=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
kernel/sched/core.c:9159 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
9 locks held by syz-executor/2971:
#0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
#0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
#0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289
#1: ffff888122f8b5b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
#1: ffff888122f8b5b8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739
#2: ffff888120a235b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline]
#2: ffff888120a235b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746
#3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#4: ffff88811f19dbb8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
#4: ffff88811f19dbb8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#6: ffff8881311fea38 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline]
#6: ffff8881311fea38 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline]
#6: ffff8881311fea38 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline]
#6: ffff8881311fea38 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline]
#6: ffff8881311fea38 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline]
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270
#8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 2971 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876
__might_resched+0x2e0/0x330 kernel/sched/core.c:9159
__cancel_work_sync kernel/workqueue.c:4487 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568
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+0x19a/0x610 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+0x1dd/0x990 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x18/0x90 kernel/kcov.c:246
Code: 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 f9 c2 4a 0b 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d d0 c2 4a 0b 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 e9 80 6b
RSP: 0018:ffffc9000146f440 EFLAGS: 00000246
RAX: 0000000080000003 RBX: 000000000012de7e RCX: ffffffff82216929
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888123993c00
RBP: ffff88823ff5d4a0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000
rcu_read_lock_sched include/linux/rcupdate.h:939 [inline]
pfn_valid+0xe9/0x4a0 include/linux/mmzone.h:2270
page_table_check_set+0x25/0x580 mm/page_table_check.c:105
__page_table_check_ptes_set+0x217/0x270 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:1118 [inline]
copy_present_ptes mm/memory.c:1197 [inline]
copy_pte_range mm/memory.c:1320 [inline]
copy_pmd_range mm/memory.c:1408 [inline]
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0x1c87/0x56a0 mm/memory.c:1555
dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840
dup_mm kernel/fork.c:1543 [inline]
copy_mm kernel/fork.c:1595 [inline]
copy_process+0x4996/0x7dd0 kernel/fork.c:2289
kernel_clone+0x176/0x9d0 kernel/fork.c:2748
__do_sys_clone+0xd9/0x120 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e23e86b52
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:00007ffc2bdf0440 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc2bdf0440 RCX: 00007f9e23e86b52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc2bdf05cc R08: 0000000000000000 R09: 0000000000000001
R10: 00005555680f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000008e997 R15: 00007ffc2bdf0620
BUG: sleeping function called from invalid context at kernel/workqueue.c:4487
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2971, name: syz-executor
preempt_count: 103, expected: 0
RCU nest depth: 2, expected: 0
9 locks held by syz-executor/2971:
#0:
ffffffff89823d10
(dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
(dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
(dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289
#1:
ffff888122f8b5b8 (
&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739
#2: ffff888120a235b8 (
&mm->mmap_lock
/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline]
/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746
#3: ffffffff896e2bc0 (
rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#4: ffff88811f19dbb8 (
ptlock_ptr(ptdesc)
#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#5:
ffffffff896e2bc0 (rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#6: ffff8881311fea38
(ptlock_ptr(ptdesc)#2/1
){+.+.}-{3:3}
, at: copy_pte_range mm/memory.c:1272 [inline]
, at: copy_pmd_range mm/memory.c:1408 [inline]
, at: copy_pud_range mm/memory.c:1445 [inline]
, at: copy_p4d_range mm/memory.c:1469 [inline]
, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555
#7: ffffffff896e2b00 (
rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline]
rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270
#8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 2971 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9197
__cancel_work_sync kernel/workqueue.c:4487 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568
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+0x19a/0x610 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+0x1dd/0x990 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x18/0x90 kernel/kcov.c:246
Code: 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 f9 c2 4a 0b 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d d0 c2 4a 0b 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 e9 80 6b
RSP: 0018:ffffc9000146f440 EFLAGS: 00000246
RAX: 0000000080000003 RBX: 000000000012de7e RCX: ffffffff82216929
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888123993c00
RBP: ffff88823ff5d4a0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000
rcu_read_lock_sched include/linux/rcupdate.h:939 [inline]
pfn_valid+0xe9/0x4a0 include/linux/mmzone.h:2270
page_table_check_set+0x25/0x580 mm/page_table_check.c:105
__page_table_check_ptes_set+0x217/0x270 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:1118 [inline]
copy_present_ptes mm/memory.c:1197 [inline]
copy_pte_range mm/memory.c:1320 [inline]
copy_pmd_range mm/memory.c:1408 [inline]
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0x1c87/0x56a0 mm/memory.c:1555
dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840
dup_mm kernel/fork.c:1543 [inline]
copy_mm kernel/fork.c:1595 [inline]
copy_process+0x4996/0x7dd0 kernel/fork.c:2289
kernel_clone+0x176/0x9d0 kernel/fork.c:2748
__do_sys_clone+0xd9/0x120 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e23e86b52
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:00007ffc2bdf0440 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc2bdf0440 RCX: 00007f9e23e86b52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc2bdf05cc R08: 0000000000000000 R09: 0000000000000001
R10: 00005555680f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000008e997 R15: 00007ffc2bdf0620
=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G W
-----------------------------
kernel/rcu/srcutree.c:1483 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
9 locks held by syz-executor/2971:
#0: ffffffff89823d10 (dup_mmap_sem
){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289
#1:
ffff888122f8b5b8 (
&mm->mmap_lock){++++}-{4:4}
, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739
#2:
ffff888120a235b8 (&mm->mmap_lock
/1
){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline]
){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746
#3:
ffffffff896e2bc0
(rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
(rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
(rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#4: ffff88811f19dbb8 (ptlock_ptr(ptdesc)
#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#5:
ffffffff896e2bc0
(
rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#6: ffff8881311fea38 (
ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline]
ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline]
ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline]
ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline]
ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline]
#7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270
#8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 2971 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876
__synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1483
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:2636
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:3880
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+0x19a/0x610 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+0x1dd/0x990 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x18/0x90 kernel/kcov.c:246
Code: 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 f9 c2 4a 0b 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d d0 c2 4a 0b 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 e9 80 6b
RSP: 0018:ffffc9000146f440 EFLAGS: 00000246
RAX: 0000000080000003 RBX: 000000000012de7e RCX: ffffffff82216929
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888123993c00
RBP: ffff88823ff5d4a0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000
rcu_read_lock_sched include/linux/rcupdate.h:939 [inline]
pfn_valid+0xe9/0x4a0 include/linux/mmzone.h:2270
page_table_check_set+0x25/0x580 mm/page_table_check.c:105
__page_table_check_ptes_set+0x217/0x270 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:1118 [inline]
copy_present_ptes mm/memory.c:1197 [inline]
copy_pte_range mm/memory.c:1320 [inline]
copy_pmd_range mm/memory.c:1408 [inline]
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0x1c87/0x56a0 mm/memory.c:1555
dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840
dup_mm kernel/fork.c:1543 [inline]
copy_mm kernel/fork.c:1595 [inline]
copy_process+0x4996/0x7dd0 kernel/fork.c:2289
kernel_clone+0x176/0x9d0 kernel/fork.c:2748
__do_sys_clone+0xd9/0x120 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e23e86b52
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:00007ffc2bdf0440 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc2bdf0440 RCX: 00007f9e23e86b52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc2bdf05cc R08: 0000000000000000 R09: 0000000000000001
R10: 00005555680f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000008e997 R15: 00007ffc2bdf0620
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1491
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2971, name: syz-executor
preempt_count: 103, expected: 0
RCU nest depth: 2, expected: 0
9 locks held by syz-executor/2971:
#0: ffffffff89823d10 (dup_mmap_sem
){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline]
){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289
#1:
ffff888122f8b5b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
ffff888122f8b5b8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739
#2:
ffff888120a235b8 (&mm->mmap_lock/1
){+.+.}-{4:4}
, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline]
, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746
#3: ffffffff896e2bc0 (
rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#4:
ffff88811f19dbb8 (ptlock_ptr(ptdesc)
#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#5: ffffffff896e2bc0
(rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#6:
ffff8881311fea38 (ptlock_ptr(ptdesc)
#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline]
#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline]
#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline]
#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline]
#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555
#7:
ffffffff896e2b00 (
rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline]
rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270
#8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 2971 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9197
__synchronize_srcu+0x13c/0x300 kernel/rcu/srcutree.c:1491
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:2636
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:3880
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+0x19a/0x610 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+0x1dd/0x990 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x160/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x18/0x90 kernel/kcov.c:246
Code: 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 8b 05 f9 c2 4a 0b 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d d0 c2 4a 0b 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 e9 80 6b
RSP: 0018:ffffc9000146f440 EFLAGS: 00000246
RAX: 0000000080000003 RBX: 000000000012de7e RCX: ffffffff82216929
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888123993c00
RBP: ffff88823ff5d4a0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000
rcu_read_lock_sched include/linux/rcupdate.h:939 [inline]
pfn_valid+0xe9/0x4a0 include/linux/mmzone.h:2270
page_table_check_set+0x25/0x580 mm/page_table_check.c:105
__page_table_check_ptes_set+0x217/0x270 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:1118 [inline]
copy_present_ptes mm/memory.c:1197 [inline]
copy_pte_range mm/memory.c:1320 [inline]
copy_pmd_range mm/memory.c:1408 [inline]
copy_pud_range mm/memory.c:1445 [inline]
copy_p4d_range mm/memory.c:1469 [inline]
copy_page_range+0x1c87/0x56a0 mm/memory.c:1555
dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840
dup_mm kernel/fork.c:1543 [inline]
copy_mm kernel/fork.c:1595 [inline]
copy_process+0x4996/0x7dd0 kernel/fork.c:2289
kernel_clone+0x176/0x9d0 kernel/fork.c:2748
__do_sys_clone+0xd9/0x120 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9e23e86b52
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:00007ffc2bdf0440 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc2bdf0440 RCX: 00007f9e23e86b52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc2bdf05cc R08: 0000000000000000 R09: 0000000000000001
R10: 00005555680f87d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000008e997 R15: 00007ffc2bdf0620
ODEBUG: object ffffc90000007a70 is NOT on stack ffffc90001468000, but annotated.
======================================================
----------------
Code disassembly (best guess):
0: 66 90 xchg %ax,%ax
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 65 8b 05 f9 c2 4a 0b mov %gs:0xb4ac2f9(%rip),%eax # 0xb4ac312
19: 49 89 f8 mov %rdi,%r8
1c: 49 89 f1 mov %rsi,%r9
1f: 49 89 d2 mov %rdx,%r10
22: 65 48 8b 3d d0 c2 4a mov %gs:0xb4ac2d0(%rip),%rdi # 0xb4ac2fa
29: 0b
* 2a: a9 00 01 ff 00 test $0xff0100,%eax <-- trapping instruction
2f: 74 1b je 0x4c
31: f6 c4 01 test $0x1,%ah
34: 74 07 je 0x3d
36: a9 00 00 ff 00 test $0xff0000,%eax
3b: 74 05 je 0x42
3d: e9 .byte 0xe9
3e: 80 .byte 0x80
3f: 6b .byte 0x6b