BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 21248, name: syz.7.3734
preempt_count: 101, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.7.3734/21248: 5, last CPU#1:
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: madvise_lock+0x152/0x2e0 mm/madvise.c:1789
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: anon_vma_lock_write mm/internal.h:295 [inline]
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: __folio_split+0x68b/0x1a40 mm/huge_memory.c:4202
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
 #4: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 21248 Comm: syz.7.3734 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x36a/0x4c0 kernel/sched/core.c:9264
 __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4561
 mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:memcmp+0x40/0x230 lib/string.c:665
Code: fc ff df 48 83 fa 08 0f 82 50 01 00 00 48 89 f3 49 89 fe 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 6f 49 8d 46 07 48 89 c1 <48> c1 e9 03 42 0f b6 0c 39 84 c9 0f 85 85 00 00 00 4c 8b 27 48 89
RSP: 0018:ffffc900058ee280 EFLAGS: 00000246
RAX: ffff8880429a85bf RBX: ffff88800c1a75b8 RCX: ffff8880429a85bf
RDX: 0000000000000a48 RSI: ffff88800c1a75b8 RDI: ffff8880429a85b8
RBP: ffffc900058ee4a8 R08: ffffea00010a6a07 R09: 1ffffd4000214d40
R10: dffffc0000000000 R11: fffff94000214d41 R12: 0000000000000000
R13: ffffea00010a6a34 R14: ffff8880429a85b8 R15: dffffc0000000000
 pages_identical include/linux/mm.h:5354 [inline]
 try_to_map_unused_to_zeropage mm/migrate.c:322 [inline]
 remove_migration_pte+0xb41/0x2300 mm/migrate.c:385
 rmap_walk_anon+0x6d4/0x910 mm/rmap.c:3057
 remove_migration_ptes+0x186/0x210 mm/migrate.c:483
 remap_page mm/huge_memory.c:3640 [inline]
 __folio_split+0x108a/0x1a40 mm/huge_memory.c:4289
 shrink_folio_list+0x3277/0x5250 mm/vmscan.c:1286
 reclaim_folio_list+0x100/0x430 mm/vmscan.c:2168
 reclaim_pages+0x452/0x530 mm/vmscan.c:2205
 madvise_cold_or_pageout_pte_range+0x1fe5/0x2300 mm/madvise.c:452
 walk_pmd_range mm/pagewalk.c:147 [inline]
 walk_pud_range mm/pagewalk.c:237 [inline]
 walk_p4d_range mm/pagewalk.c:278 [inline]
 walk_pgd_range+0x102d/0x1dc0 mm/pagewalk.c:319
 __walk_page_range+0x16d/0x720 mm/pagewalk.c:427
 walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:737
 madvise_pageout_page_range mm/madvise.c:630 [inline]
 madvise_pageout mm/madvise.c:655 [inline]
 madvise_vma_behavior+0x2831/0x41d0 mm/madvise.c:1366
 madvise_walk_vmas+0x576/0xb00 mm/madvise.c:1721
 madvise_do_behavior+0x385/0x540 mm/madvise.c:1916
 do_madvise+0x327/0x3a0 mm/madvise.c:2014
 __do_sys_madvise mm/madvise.c:2023 [inline]
 __se_sys_madvise mm/madvise.c:2021 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2021
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca2779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca285d3028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fca27a26090 RCX: 00007fca2779e159
RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007fca2783506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fca27a26128 R14: 00007fca27a26090 R15: 00007fca27b4fa48
 </TASK>

=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G        W    L     
-----------------------------
kernel/rcu/srcutree.c:1468 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.7.3734/21248: 5, last CPU#1:
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: madvise_lock+0x152/0x2e0 mm/madvise.c:1789
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: anon_vma_lock_write mm/internal.h:295 [inline]
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: __folio_split+0x68b/0x1a40 mm/huge_memory.c:4202
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
 #4: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745

stack backtrace:
CPU: 1 UID: 0 PID: 21248 Comm: syz.7.3734 Tainted: G        W    L      syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6972
 __synchronize_srcu+0x157/0x2f0 kernel/rcu/srcutree.c:1464
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister+0x129/0x3f0 drivers/base/power/wakeup.c:237
 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:69
 device_release+0xc4/0x1f0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x222/0x550 lib/kobject.c:737
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:memcmp+0x40/0x230 lib/string.c:665
Code: fc ff df 48 83 fa 08 0f 82 50 01 00 00 48 89 f3 49 89 fe 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 6f 49 8d 46 07 48 89 c1 <48> c1 e9 03 42 0f b6 0c 39 84 c9 0f 85 85 00 00 00 4c 8b 27 48 89
RSP: 0018:ffffc900058ee280 EFLAGS: 00000246
RAX: ffff8880429a85bf RBX: ffff88800c1a75b8 RCX: ffff8880429a85bf
RDX: 0000000000000a48 RSI: ffff88800c1a75b8 RDI: ffff8880429a85b8
RBP: ffffc900058ee4a8 R08: ffffea00010a6a07 R09: 1ffffd4000214d40
R10: dffffc0000000000 R11: fffff94000214d41 R12: 0000000000000000
R13: ffffea00010a6a34 R14: ffff8880429a85b8 R15: dffffc0000000000
 pages_identical include/linux/mm.h:5354 [inline]
 try_to_map_unused_to_zeropage mm/migrate.c:322 [inline]
 remove_migration_pte+0xb41/0x2300 mm/migrate.c:385
 rmap_walk_anon+0x6d4/0x910 mm/rmap.c:3057
 remove_migration_ptes+0x186/0x210 mm/migrate.c:483
 remap_page mm/huge_memory.c:3640 [inline]
 __folio_split+0x108a/0x1a40 mm/huge_memory.c:4289
 shrink_folio_list+0x3277/0x5250 mm/vmscan.c:1286
 reclaim_folio_list+0x100/0x430 mm/vmscan.c:2168
 reclaim_pages+0x452/0x530 mm/vmscan.c:2205
 madvise_cold_or_pageout_pte_range+0x1fe5/0x2300 mm/madvise.c:452
 walk_pmd_range mm/pagewalk.c:147 [inline]
 walk_pud_range mm/pagewalk.c:237 [inline]
 walk_p4d_range mm/pagewalk.c:278 [inline]
 walk_pgd_range+0x102d/0x1dc0 mm/pagewalk.c:319
 __walk_page_range+0x16d/0x720 mm/pagewalk.c:427
 walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:737
 madvise_pageout_page_range mm/madvise.c:630 [inline]
 madvise_pageout mm/madvise.c:655 [inline]
 madvise_vma_behavior+0x2831/0x41d0 mm/madvise.c:1366
 madvise_walk_vmas+0x576/0xb00 mm/madvise.c:1721
 madvise_do_behavior+0x385/0x540 mm/madvise.c:1916
 do_madvise+0x327/0x3a0 mm/madvise.c:2014
 __do_sys_madvise mm/madvise.c:2023 [inline]
 __se_sys_madvise mm/madvise.c:2021 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2021
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca2779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca285d3028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fca27a26090 RCX: 00007fca2779e159
RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007fca2783506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fca27a26128 R14: 00007fca27a26090 R15: 00007fca27b4fa48
 </TASK>
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 21248, name: syz.7.3734
preempt_count: 101, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.7.3734/21248: 5, last CPU#1:
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
 #0: ffff888025f61bc0 (&mm->mmap_lock){++++}-{4:4}, at: madvise_lock+0x152/0x2e0 mm/madvise.c:1789
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: anon_vma_lock_write mm/internal.h:295 [inline]
 #1: ffff888077bfa6a0 (&anon_vma->rwsem){++++}-{4:4}, at: __folio_split+0x68b/0x1a40 mm/huge_memory.c:4202
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #3: ffff888058fd7d38 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
 #4: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 21248 Comm: syz.7.3734 Tainted: G        W    L      syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 __might_resched+0x36a/0x4c0 kernel/sched/core.c:9264
 __synchronize_srcu+0x1a1/0x2f0 kernel/rcu/srcutree.c:1472
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister+0x129/0x3f0 drivers/base/power/wakeup.c:237
 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:69
 device_release+0xc4/0x1f0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x222/0x550 lib/kobject.c:737
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:memcmp+0x40/0x230 lib/string.c:665
Code: fc ff df 48 83 fa 08 0f 82 50 01 00 00 48 89 f3 49 89 fe 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 6f 49 8d 46 07 48 89 c1 <48> c1 e9 03 42 0f b6 0c 39 84 c9 0f 85 85 00 00 00 4c 8b 27 48 89
RSP: 0018:ffffc900058ee280 EFLAGS: 00000246
RAX: ffff8880429a85bf RBX: ffff88800c1a75b8 RCX: ffff8880429a85bf
RDX: 0000000000000a48 RSI: ffff88800c1a75b8 RDI: ffff8880429a85b8
RBP: ffffc900058ee4a8 R08: ffffea00010a6a07 R09: 1ffffd4000214d40
R10: dffffc0000000000 R11: fffff94000214d41 R12: 0000000000000000
R13: ffffea00010a6a34 R14: ffff8880429a85b8 R15: dffffc0000000000
 pages_identical include/linux/mm.h:5354 [inline]
 try_to_map_unused_to_zeropage mm/migrate.c:322 [inline]
 remove_migration_pte+0xb41/0x2300 mm/migrate.c:385
 rmap_walk_anon+0x6d4/0x910 mm/rmap.c:3057
 remove_migration_ptes+0x186/0x210 mm/migrate.c:483
 remap_page mm/huge_memory.c:3640 [inline]
 __folio_split+0x108a/0x1a40 mm/huge_memory.c:4289
 shrink_folio_list+0x3277/0x5250 mm/vmscan.c:1286
 reclaim_folio_list+0x100/0x430 mm/vmscan.c:2168
 reclaim_pages+0x452/0x530 mm/vmscan.c:2205
 madvise_cold_or_pageout_pte_range+0x1fe5/0x2300 mm/madvise.c:452
 walk_pmd_range mm/pagewalk.c:147 [inline]
 walk_pud_range mm/pagewalk.c:237 [inline]
 walk_p4d_range mm/pagewalk.c:278 [inline]
 walk_pgd_range+0x102d/0x1dc0 mm/pagewalk.c:319
 __walk_page_range+0x16d/0x720 mm/pagewalk.c:427
 walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:737
 madvise_pageout_page_range mm/madvise.c:630 [inline]
 madvise_pageout mm/madvise.c:655 [inline]
 madvise_vma_behavior+0x2831/0x41d0 mm/madvise.c:1366
 madvise_walk_vmas+0x576/0xb00 mm/madvise.c:1721
 madvise_do_behavior+0x385/0x540 mm/madvise.c:1916
 do_madvise+0x327/0x3a0 mm/madvise.c:2014
 __do_sys_madvise mm/madvise.c:2023 [inline]
 __se_sys_madvise mm/madvise.c:2021 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2021
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca2779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca285d3028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fca27a26090 RCX: 00007fca2779e159
RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007fca2783506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fca27a26128 R14: 00007fca27a26090 R15: 00007fca27b4fa48
 </TASK>
ODEBUG: object ffffc90000a18a80 is NOT on stack ffffc900058e8000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#1: syz.7.3734/21248
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#1: syz.7.3734/21248
WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#1: syz.7.3734/21248
Modules linked in:
CPU: 1 UID: 0 PID: 21248 Comm: syz.7.3734 Tainted: G        W    L      syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:672 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:705 [inline]
RIP: 0010:__debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798
Code: fe 06 cc 41 ff c7 44 89 3d 69 31 e8 15 48 c7 c1 80 b6 6d 8c 48 c7 c7 e0 b6 6d 8c 84 c0 48 0f 45 f9 48 89 de e8 ad a3 3c fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 81 ac 6d 0a 3b 05 7f
RSP: 0018:ffffc90000a189b8 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc90000a18a80 RCX: 7958a79aa5935900
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff888029603ea0 R08: 0000000000000100 R09: 1ffffffff1ed22ec
R10: dffffc0000000000 R11: fffffbfff1ed22ed R12: 1ffff9200014314c
R13: ffff88803e52a460 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fca285d36c0(0000) GS:ffff888124dc8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fca285d1fe0 CR3: 0000000081b58000 CR4: 00000000003526f0
DR0: 0000000000000002 DR1: 00000000000012ad DR2: 0000000000007611
DR3: 000000000000000a DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __synchronize_srcu+0x1d5/0x2f0 kernel/rcu/srcutree.c:1475
 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
 wakeup_source_unregister+0x129/0x3f0 drivers/base/power/wakeup.c:237
 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:69
 device_release+0xc4/0x1f0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x222/0x550 lib/kobject.c:737
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:memcmp+0x40/0x230 lib/string.c:665
Code: fc ff df 48 83 fa 08 0f 82 50 01 00 00 48 89 f3 49 89 fe 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 6f 49 8d 46 07 48 89 c1 <48> c1 e9 03 42 0f b6 0c 39 84 c9 0f 85 85 00 00 00 4c 8b 27 48 89
RSP: 0018:ffffc900058ee280 EFLAGS: 00000246
RAX: ffff8880429a85bf RBX: ffff88800c1a75b8 RCX: ffff8880429a85bf
RDX: 0000000000000a48 RSI: ffff88800c1a75b8 RDI: ffff8880429a85b8
RBP: ffffc900058ee4a8 R08: ffffea00010a6a07 R09: 1ffffd4000214d40
R10: dffffc0000000000 R11: fffff94000214d41 R12: 0000000000000000
R13: ffffea00010a6a34 R14: ffff8880429a85b8 R15: dffffc0000000000
 pages_identical include/linux/mm.h:5354 [inline]
 try_to_map_unused_to_zeropage mm/migrate.c:322 [inline]
 remove_migration_pte+0xb41/0x2300 mm/migrate.c:385
 rmap_walk_anon+0x6d4/0x910 mm/rmap.c:3057
 remove_migration_ptes+0x186/0x210 mm/migrate.c:483
 remap_page mm/huge_memory.c:3640 [inline]
 __folio_split+0x108a/0x1a40 mm/huge_memory.c:4289
 shrink_folio_list+0x3277/0x5250 mm/vmscan.c:1286
 reclaim_folio_list+0x100/0x430 mm/vmscan.c:2168
 reclaim_pages+0x452/0x530 mm/vmscan.c:2205
 madvise_cold_or_pageout_pte_range+0x1fe5/0x2300 mm/madvise.c:452
 walk_pmd_range mm/pagewalk.c:147 [inline]
 walk_pud_range mm/pagewalk.c:237 [inline]
 walk_p4d_range mm/pagewalk.c:278 [inline]
 walk_pgd_range+0x102d/0x1dc0 mm/pagewalk.c:319
 __walk_page_range+0x16d/0x720 mm/pagewalk.c:427
 walk_page_range_vma_unsafe+0x309/0x410 mm/pagewalk.c:737
 madvise_pageout_page_range mm/madvise.c:630 [inline]
 madvise_pageout mm/madvise.c:655 [inline]
 madvise_vma_behavior+0x2831/0x41d0 mm/madvise.c:1366
 madvise_walk_vmas+0x576/0xb00 mm/madvise.c:1721
 madvise_do_behavior+0x385/0x540 mm/madvise.c:1916
 do_madvise+0x327/0x3a0 mm/madvise.c:2014
 __do_sys_madvise mm/madvise.c:2023 [inline]
 __se_sys_madvise mm/madvise.c:2021 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2021
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca2779e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fca285d3028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fca27a26090 RCX: 00007fca2779e159
RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007fca2783506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fca27a26128 R14: 00007fca27a26090 R15: 00007fca27b4fa48
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	48 83 fa 08          	cmp    $0x8,%rdx
   4:	0f 82 50 01 00 00    	jb     0x15a
   a:	48 89 f3             	mov    %rsi,%rbx
   d:	49 89 fe             	mov    %rdi,%r14
  10:	4c 89 f0             	mov    %r14,%rax
  13:	48 c1 e8 03          	shr    $0x3,%rax
  17:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  1c:	84 c0                	test   %al,%al
  1e:	75 6f                	jne    0x8f
  20:	49 8d 46 07          	lea    0x7(%r14),%rax
  24:	48 89 c1             	mov    %rax,%rcx
* 27:	48 c1 e9 03          	shr    $0x3,%rcx <-- trapping instruction
  2b:	42 0f b6 0c 39       	movzbl (%rcx,%r15,1),%ecx
  30:	84 c9                	test   %cl,%cl
  32:	0f 85 85 00 00 00    	jne    0xbd
  38:	4c 8b 27             	mov    (%rdi),%r12
  3b:	48                   	rex.W
  3c:	89                   	.byte 0x89