WARNING: suspicious RCU usage in cancel_delayed_work_sync

Status: upstream: reported on 2026/08/14 15:11
Subsystems: mmc
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+9c1988bc953fca2086a3@syzkaller.appspotmail.com
First crash: 21d, last: 23m
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
d5fea00b repro-c Reproduced: ✅ ❓ WARNING: suspicious RCU usage in cancel_delayed_work_sync 2026/09/02 20:20 2026/09/02 21:58 2026/09/02 22:47 9941e97d
7f49902c assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ WARNING: suspicious RCU usage in cancel_delayed_work_sync 2026/08/15 00:46 2026/08/15 00:46 2026/08/15 01:12 746171ee
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly mmc report (Sep 2026) 0 (1) 2026/09/02 20:33
[syzbot] [mmc?] WARNING: suspicious RCU usage in cancel_delayed_work_sync 0 (1) 2026/08/14 15:11

Sample crash report:
=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
kernel/sched/core.c:9196 Illegal context switch in RCU-sched read-side critical section!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
locks held by syz-executor/7533: 9, last CPU#0:
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x4806/0x8370 kernel/fork.c:2307
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x127/0x2370 mm/mmap.c:1716
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1c9/0x2370 mm/mmap.c:1723
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1490 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1527 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1551 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xfd0/0x57c0 mm/memory.c:1637
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
 #8: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745

stack backtrace:
CPU: 0 UID: 0 PID: 7533 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6938
 __might_resched+0x2d9/0x330 kernel/sched/core.c:9196
 __cancel_work_sync kernel/workqueue.c:4561 [inline]
 cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700
 vub300_delete drivers/mmc/host/vub300.c:379 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
 vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: 46 0c 60 00 48 89 df 5b e9 4d ee 65 00 be 03 00 00 00 5b e9 f2 1f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 2c 21 80 12 48 8b 34 24 65 48 8b 15 10 21
RSP: 0018:ffffc900034af3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000061107 RCX: ffffffff828a3608
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880283d5dc0
RBP: ffff88813fe28180 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
 pfn_valid+0x1b8/0x4b0 include/linux/mmzone.h:2286
 page_table_check_set+0x25/0x580 mm/page_table_check.c:105
 __page_table_check_ptes_set+0x2c0/0x530 mm/page_table_check.c:223
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:447 [inline]
 __copy_present_ptes mm/memory.c:1200 [inline]
 copy_present_ptes mm/memory.c:1279 [inline]
 copy_pte_range mm/memory.c:1402 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x21c4/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2307
 kernel_clone+0x176/0x9d0 kernel/fork.c:2766
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2908
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc170dc6bd2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdd6ec9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdd6ec9620 RCX: 00007fc170dc6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdd6ec97ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558efac7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000048b77 R15: 00007ffdd6ec9800
 </TASK>
BUG: sleeping function called from invalid context at ker
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7533, name: syz-executor
preempt_count: 103, expected: 0
RCU nest depth: 2, expected: 0
locks held by syz-executor/7533: 9, last CPU#0:
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x4806/0x8370 kernel/fork.c:2307
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x127/0x2370 mm/mmap.c:1716
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1c9/0x2370 mm/mmap.c:1723
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1490 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1527 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1551 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xfd0/0x57c0 mm/memory.c:1637
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
 #8: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 7533 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 __might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9234
 __cancel_work_sync kernel/workqueue.c:4561 [inline]
 cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700
 vub300_delete drivers/mmc/host/vub300.c:379 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
 vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: 46 0c 60 00 48 89 df 5b e9 4d ee 65 00 be 03 00 00 00 5b e9 f2 1f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 2c 21 80 12 48 8b 34 24 65 48 8b 15 10 21
RSP: 0018:ffffc900034af3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000061107 RCX: ffffffff828a3608
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880283d5dc0
RBP: ffff88813fe28180 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
 pfn_valid+0x1b8/0x4b0 include/linux/mmzone.h:2286
 page_table_check_set+0x25/0x580 mm/page_table_check.c:105
 __page_table_check_ptes_set+0x2c0/0x530 mm/page_table_check.c:223
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:447 [inline]
 __copy_present_ptes mm/memory.c:1200 [inline]
 copy_present_ptes mm/memory.c:1279 [inline]
 copy_pte_range mm/memory.c:1402 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x21c4/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2307
 kernel_clone+0x176/0x9d0 kernel/fork.c:2766
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2908
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc170dc6bd2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdd6ec9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdd6ec9620 RCX: 00007fc170dc6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdd6ec97ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558efac7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000048b77 R15: 00007ffdd6ec9800
 </TASK>

=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G        W          
-----------------------------
kernel/rcu/srcutree.c:1464 Illegal synchronize_srcu() in same-type SRCU (or in RCU) read-side critical section!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
locks held by syz-executor/7533: 9, last CPU#0:
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x4806/0x8370 kernel/fork.c:2307
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x127/0x2370 mm/mmap.c:1716
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1c9/0x2370 mm/mmap.c:1723
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1490 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1527 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1551 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xfd0/0x57c0 mm/memory.c:1637
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
 #8: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745

stack backtrace:
CPU: 0 UID: 0 PID: 7533 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6938
 __synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1464
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
 device_release+0xd2/0x270 drivers/base/core.c:2640
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3884
 vub300_delete drivers/mmc/host/vub300.c:379 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
 vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: 46 0c 60 00 48 89 df 5b e9 4d ee 65 00 be 03 00 00 00 5b e9 f2 1f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 2c 21 80 12 48 8b 34 24 65 48 8b 15 10 21
RSP: 0018:ffffc900034af3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000061107 RCX: ffffffff828a3608
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880283d5dc0
RBP: ffff88813fe28180 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
 pfn_valid+0x1b8/0x4b0 include/linux/mmzone.h:2286
 page_table_check_set+0x25/0x580 mm/page_table_check.c:105
 __page_table_check_ptes_set+0x2c0/0x530 mm/page_table_check.c:223
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:447 [inline]
 __copy_present_ptes mm/memory.c:1200 [inline]
 copy_present_ptes mm/memory.c:1279 [inline]
 copy_pte_range mm/memory.c:1402 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x21c4/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2307
 kernel_clone+0x176/0x9d0 kernel/fork.c:2766
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2908
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc170dc6bd2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdd6ec9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdd6ec9620 RCX: 00007fc170dc6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdd6ec97ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558efac7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000048b77 R15: 00007ffdd6ec9800
 </TASK>
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7533, name: syz-executor
preempt_count: 103, expected: 0
RCU nest depth: 2, expected: 0
locks held by syz-executor/7533: 9, last CPU#0:
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
 #0: ffffffff8ef3bc70 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x4806/0x8370 kernel/fork.c:2307
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
 #1: ffff88802aa5c378 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x127/0x2370 mm/mmap.c:1716
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
 #2: ffff88801c0836b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1c9/0x2370 mm/mmap.c:1723
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #3: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #4: ffff88807c13b978 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x310 mm/pgtable-generic.c:290
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1490 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1527 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1551 [inline]
 #6: ffff888026d79e58 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xfd0/0x57c0 mm/memory.c:1637
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
 #7: ffffffff8edebfa0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
 #8: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 7533 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 __might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9234
 __synchronize_srcu+0x13c/0x300 kernel/rcu/srcutree.c:1472
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
 device_release+0xd2/0x270 drivers/base/core.c:2640
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3884
 vub300_delete drivers/mmc/host/vub300.c:379 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
 vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: 46 0c 60 00 48 89 df 5b e9 4d ee 65 00 be 03 00 00 00 5b e9 f2 1f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 2c 21 80 12 48 8b 34 24 65 48 8b 15 10 21
RSP: 0018:ffffc900034af3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000061107 RCX: ffffffff828a3608
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880283d5dc0
RBP: ffff88813fe28180 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
 pfn_valid+0x1b8/0x4b0 include/linux/mmzone.h:2286
 page_table_check_set+0x25/0x580 mm/page_table_check.c:105
 __page_table_check_ptes_set+0x2c0/0x530 mm/page_table_check.c:223
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:447 [inline]
 __copy_present_ptes mm/memory.c:1200 [inline]
 copy_present_ptes mm/memory.c:1279 [inline]
 copy_pte_range mm/memory.c:1402 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x21c4/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2307
 kernel_clone+0x176/0x9d0 kernel/fork.c:2766
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2908
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc170dc6bd2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdd6ec9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdd6ec9620 RCX: 00007fc170dc6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdd6ec97ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558efac7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000048b77 R15: 00007ffdd6ec9800
 </TASK>
ODEBUG: object ffffc90000007a60 is NOT on stack ffffc900034a8000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#0: syz-executor/7533
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705, CPU#0: syz-executor/7533
Modules linked in:
CPU: 0 UID: 0 PID: 7533 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline]
RIP: 0010:lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705
Code: c4 60 5b 5d 41 5c 41 5d 41 5e 41 5f e9 e4 ce d9 ff 83 c5 01 89 2d f0 cd 7b 1a 4c 89 e6 48 c7 c7 c0 2f 62 8c e8 31 d7 eb ff 90 <0f> 0b 90 e9 72 ac fc 03 83 c5 01 89 2d cf cd 7b 1a 49 39 c4 73 da
RSP: 0018:ffffc900000078f0 EFLAGS: 00010082
RAX: 0000000000000050 RBX: ffff88807dd66658 RCX: 0000000000000000
RDX: 0000000000000050 RSI: ffffffff81e9c5d9 RDI: fffff52000000f0f
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000104 R11: 0000000000000001 R12: ffffc90000007a60
R13: ffff8880283d5dc0 R14: 0000000000000001 R15: 0000000000000000
FS:  000055558efac500(0000) GS:ffff888123b61000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555562e784e8 CR3: 000000007b0eb000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 lookup_object_or_alloc lib/debugobjects.c:682 [inline]
 __debug_object_init+0x2a9/0x3d0 lib/debugobjects.c:798
 __synchronize_srcu+0x1c3/0x300 kernel/rcu/srcutree.c:1475
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
 device_release+0xd2/0x270 drivers/base/core.c:2640
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3884
 vub300_delete drivers/mmc/host/vub300.c:379 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
 vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
 call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x194/0x210 kernel/softirq.c:767
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: 46 0c 60 00 48 89 df 5b e9 4d ee 65 00 be 03 00 00 00 5b e9 f2 1f 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 2c 21 80 12 48 8b 34 24 65 48 8b 15 10 21
RSP: 0018:ffffc900034af3c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000061107 RCX: ffffffff828a3608
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff8880283d5dc0
RBP: ffff88813fe28180 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000008
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
 rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
 pfn_valid+0x1b8/0x4b0 include/linux/mmzone.h:2286
 page_table_check_set+0x25/0x580 mm/page_table_check.c:105
 __page_table_check_ptes_set+0x2c0/0x530 mm/page_table_check.c:223
 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline]
 set_ptes include/linux/pgtable.h:447 [inline]
 __copy_present_ptes mm/memory.c:1200 [inline]
 copy_present_ptes mm/memory.c:1279 [inline]
 copy_pte_range mm/memory.c:1402 [inline]
 copy_pmd_range mm/memory.c:1490 [inline]
 copy_pud_range mm/memory.c:1527 [inline]
 copy_p4d_range mm/memory.c:1551 [inline]
 copy_page_range+0x21c4/0x57c0 mm/memory.c:1637
 dup_mmap+0x1230/0x2370 mm/mmap.c:1819
 dup_mm kernel/fork.c:1543 [inline]
 copy_mm kernel/fork.c:1595 [inline]
 copy_process+0x4811/0x8370 kernel/fork.c:2307
 kernel_clone+0x176/0x9d0 kernel/fork.c:2766
 __do_sys_clone+0xd9/0x120 kernel/fork.c:2908
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc170dc6bd2
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdd6ec9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdd6ec9620 RCX: 00007fc170dc6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdd6ec97ac R08: 0000000000000000 R09: 0000000000000001
R10: 000055558efac7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 0000000000048b77 R15: 00007ffdd6ec9800
 </TASK>
----------------
Code disassembly (best guess):
   0:	46 0c 60             	rex.RX or $0x60,%al
   3:	00 48 89             	add    %cl,-0x77(%rax)
   6:	df 5b e9             	fistps -0x17(%rbx)
   9:	4d ee                	rex.WRB out %al,(%dx)
   b:	65 00 be 03 00 00 00 	add    %bh,%gs:0x3(%rsi)
  12:	5b                   	pop    %rbx
  13:	e9 f2 1f 1d 03       	jmp    0x31d200a
  18:	66 90                	xchg   %ax,%ax
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
* 2a:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2e:	65 48 8b 05 2c 21 80 	mov    %gs:0x1280212c(%rip),%rax        # 0x12802162
  35:	12
  36:	48 8b 34 24          	mov    (%rsp),%rsi
  3a:	65                   	gs
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	15                   	.byte 0x15
  3e:	10 21                	adc    %ah,(%rcx)

Crashes (129):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/03 17:52 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 15:29 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 07:33 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/17 14:09 upstream 8d3ae59288f1 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/04 03:18 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 20:47 linux-next 9d80aa4617b3 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 18:59 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 16:13 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 11:03 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 05:10 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 04:01 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/03 02:09 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/02 18:30 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/02 14:44 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/02 13:27 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/02 11:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/02 01:14 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing edc1518454f6 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 23:29 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 17:33 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 15:01 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 10:04 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 06:12 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 05:41 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5704a4065c2c 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 23:39 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cee9395acd80 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 17:03 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cee9395acd80 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 08:44 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 02:37 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 22:33 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 14:06 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 12:24 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 11:20 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 08:58 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 21:16 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 14:23 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 13:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 03:49 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/28 16:23 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/28 09:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 18:56 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 13:21 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 09:49 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 07:11 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 00:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 21:29 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 16:26 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 45c13f3f9e3b a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 03:53 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing e1e6e541c5c9 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 01:38 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing e1e6e541c5c9 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 23:23 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing e1e6e541c5c9 a9a1fc32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 20:48 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing e1e6e541c5c9 a9a1fc32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/14 16:56 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing bdab5605259b 6f9b3e89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/14 05:43 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 05abeffcc27e b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/13 20:33 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5d5fd841c346 b13552fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING: suspicious RCU usage in cancel_delayed_work_sync
* Struck through repros no longer work on HEAD.