=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G L
-----------------------------
kernel/sched/core.c:9226 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/26665: 9, last CPU#1:
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x10f/0x480 kernel/fork.c:1595
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x195/0x1dc0 mm/mmap.c:1716
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x221/0x1dc0 mm/mmap.c:1723
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range+0x6fb/0x5c10 mm/memory.c:1490
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#8: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 1 UID: 0 PID: 26665 Comm: syz-executor 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:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6972
__might_resched+0xbb/0x4c0 kernel/sched/core.c:9226
__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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x2f/0xb0 kernel/rcu/tree.c:753
Code: 57 41 56 53 65 48 ff 05 0f f4 e8 11 e8 4a 26 3a 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 97 6e 8e <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b 74 8b 00
RSP: 0018:ffffc9000693f230 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000004
RDX: 0000000000000000 RSI: ffffffff8c6dac60 RDI: ffffffff8c6dac20
RBP: 0000000000000001 R08: ffffffff8243da5a R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008bfbf1d R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8e6e97d8 R15: dffffc0000000000
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x34b/0x490 include/linux/mmzone.h:2286
page_table_check_set+0x25/0x530 mm/page_table_check.c:105
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+0x4adc/0x5c10 mm/memory.c:1490
copy_pud_range mm/memory.c:1527 [inline]
copy_p4d_range mm/memory.c:1551 [inline]
copy_page_range+0xc82/0x1290 mm/memory.c:1637
dup_mmap+0xf17/0x1dc0 mm/mmap.c:1819
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e79/0x4400 kernel/fork.c:2310
kernel_clone+0x2d7/0x940 kernel/fork.c:2769
__do_sys_clone kernel/fork.c:2911 [inline]
__se_sys_clone kernel/fork.c:2895 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2895
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: 0033:0x7fbcba9c6bd2
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:00007fbcbad4fc60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fbcbad4fc60 RCX: 00007fbcba9c6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fbcbad4fdec R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653cd7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000001a3aa5 R15: 00007fbcbad4fe40
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 26665, name: syz-executor
preempt_count: 104, expected: 0
RCU nest depth: 2, expected: 0
locks held by syz-executor/26665: 9, last CPU#1:
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x10f/0x480 kernel/fork.c:1595
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x195/0x1dc0 mm/mmap.c:1716
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x221/0x1dc0 mm/mmap.c:1723
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range+0x6fb/0x5c10 mm/memory.c:1490
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#8: 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: 26665 Comm: syz-executor 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:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x2f/0xb0 kernel/rcu/tree.c:753
Code: 57 41 56 53 65 48 ff 05 0f f4 e8 11 e8 4a 26 3a 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 97 6e 8e <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b 74 8b 00
RSP: 0018:ffffc9000693f230 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000004
RDX: 0000000000000000 RSI: ffffffff8c6dac60 RDI: ffffffff8c6dac20
RBP: 0000000000000001 R08: ffffffff8243da5a R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008bfbf1d R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8e6e97d8 R15: dffffc0000000000
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x34b/0x490 include/linux/mmzone.h:2286
page_table_check_set+0x25/0x530 mm/page_table_check.c:105
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+0x4adc/0x5c10 mm/memory.c:1490
copy_pud_range mm/memory.c:1527 [inline]
copy_p4d_range mm/memory.c:1551 [inline]
copy_page_range+0xc82/0x1290 mm/memory.c:1637
dup_mmap+0xf17/0x1dc0 mm/mmap.c:1819
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e79/0x4400 kernel/fork.c:2310
kernel_clone+0x2d7/0x940 kernel/fork.c:2769
__do_sys_clone kernel/fork.c:2911 [inline]
__se_sys_clone kernel/fork.c:2895 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2895
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: 0033:0x7fbcba9c6bd2
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:00007fbcbad4fc60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fbcbad4fc60 RCX: 00007fbcba9c6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fbcbad4fdec R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653cd7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000001a3aa5 R15: 00007fbcbad4fe40
================================
WARNING: inconsistent lock state
syzkaller #0 Tainted: G W L
--------------------------------
inconsistent {SOFTIRQ-ON-R} -> {IN-SOFTIRQ-W} usage.
syz-executor/26665 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffffffff8f817d78 (wakeup_srcu){.+-+}-{0:0}, at: srcu_lock_sync include/linux/srcu.h:210 [inline]
ffffffff8f817d78 (wakeup_srcu){.+-+}-{0:0}, at: __synchronize_srcu+0xb5/0x2f0 kernel/rcu/srcutree.c:1462
{SOFTIRQ-ON-R} state was registered at:
lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
srcu_lock_acquire include/linux/srcu.h:198 [inline]
srcu_read_lock include/linux/srcu.h:305 [inline]
pm_print_active_wakeup_sources+0x60/0x370 drivers/base/power/wakeup.c:843
wakeup_count_store+0xcc/0x120 kernel/power/main.c:893
kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
aio_write+0x5d0/0x870 fs/aio.c:1687
__io_submit_one fs/aio.c:-1 [inline]
io_submit_one+0x798/0x13d0 fs/aio.c:2106
__do_sys_io_submit fs/aio.c:2165 [inline]
__se_sys_io_submit+0x195/0x340 fs/aio.c:2135
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
irq event stamp: 1245494
hardirqs last enabled at (1245494): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:210 [inline]
hardirqs last enabled at (1245494): [] _raw_spin_unlock_irqrestore+0x30/0x80 kernel/locking/spinlock.c:221
hardirqs last disabled at (1245493): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:153 [inline]
hardirqs last disabled at (1245493): [] _raw_spin_lock_irqsave+0x1a/0x60 kernel/locking/spinlock.c:181
softirqs last enabled at (1244832): [] __do_softirq kernel/softirq.c:679 [inline]
softirqs last enabled at (1244832): [] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last enabled at (1244832): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
softirqs last disabled at (1244871): [] __do_softirq kernel/softirq.c:679 [inline]
softirqs last disabled at (1244871): [] invoke_softirq kernel/softirq.c:519 [inline]
softirqs last disabled at (1244871): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(wakeup_srcu);
lock(wakeup_srcu);
*** DEADLOCK ***
locks held by syz-executor/26665: 9, last CPU#1:
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline]
#0: ffffffff8ee36730 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x10f/0x480 kernel/fork.c:1595
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
#1: ffff8880771703b8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x195/0x1dc0 mm/mmap.c:1716
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:552 [inline]
#2: ffff88804ff503b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x221/0x1dc0 mm/mmap.c:1723
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#3: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#4: ffff888074383a98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#5: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1354 [inline]
#6: ffff888035716c78 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range+0x6fb/0x5c10 mm/memory.c:1490
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#7: ffffffff8ed5c9e0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#8: ffffc90000a18cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 1 UID: 0 PID: 26665 Comm: syz-executor 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:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_usage_bug+0x28c/0x2e0 kernel/locking/lockdep.c:4086
valid_state+0xbe/0xf0 kernel/locking/lockdep.c:4100
mark_lock_irq+0x58/0x380 kernel/locking/lockdep.c:4317
mark_lock+0x117/0x190 kernel/locking/lockdep.c:4797
mark_usage kernel/locking/lockdep.c:-1 [inline]
__lock_acquire+0x71e/0x2de0 kernel/locking/lockdep.c:5242
lock_sync+0xb3/0x130 kernel/locking/lockdep.c:5991
srcu_lock_sync include/linux/srcu.h:210 [inline]
__synchronize_srcu+0xc9/0x2f0 kernel/rcu/srcutree.c:1462
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x2f/0xb0 kernel/rcu/tree.c:753
Code: 57 41 56 53 65 48 ff 05 0f f4 e8 11 e8 4a 26 3a 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 97 6e 8e <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b 74 8b 00
RSP: 0018:ffffc9000693f230 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000004
RDX: 0000000000000000 RSI: ffffffff8c6dac60 RDI: ffffffff8c6dac20
RBP: 0000000000000001 R08: ffffffff8243da5a R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008bfbf1d R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8e6e97d8 R15: dffffc0000000000
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x34b/0x490 include/linux/mmzone.h:2286
page_table_check_set+0x25/0x530 mm/page_table_check.c:105
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+0x4adc/0x5c10 mm/memory.c:1490
copy_pud_range mm/memory.c:1527 [inline]
copy_p4d_range mm/memory.c:1551 [inline]
copy_page_range+0xc82/0x1290 mm/memory.c:1637
dup_mmap+0xf17/0x1dc0 mm/mmap.c:1819
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e79/0x4400 kernel/fork.c:2310
kernel_clone+0x2d7/0x940 kernel/fork.c:2769
__do_sys_clone kernel/fork.c:2911 [inline]
__se_sys_clone kernel/fork.c:2895 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2895
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: 0033:0x7fbcba9c6bd2
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:00007fbcbad4fc60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fbcbad4fc60 RCX: 00007fbcba9c6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fbcbad4fdec R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653cd7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000001a3aa5 R15: 00007fbcbad4fe40
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 26665, name: syz-executor
preempt_count: 104, expected: 0
RCU nest depth: 2, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 UID: 0 PID: 26665 Comm: syz-executor 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:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x2f/0xb0 kernel/rcu/tree.c:753
Code: 57 41 56 53 65 48 ff 05 0f f4 e8 11 e8 4a 26 3a 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 97 6e 8e <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b 74 8b 00
RSP: 0018:ffffc9000693f230 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000004
RDX: 0000000000000000 RSI: ffffffff8c6dac60 RDI: ffffffff8c6dac20
RBP: 0000000000000001 R08: ffffffff8243da5a R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008bfbf1d R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8e6e97d8 R15: dffffc0000000000
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x34b/0x490 include/linux/mmzone.h:2286
page_table_check_set+0x25/0x530 mm/page_table_check.c:105
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+0x4adc/0x5c10 mm/memory.c:1490
copy_pud_range mm/memory.c:1527 [inline]
copy_p4d_range mm/memory.c:1551 [inline]
copy_page_range+0xc82/0x1290 mm/memory.c:1637
dup_mmap+0xf17/0x1dc0 mm/mmap.c:1819
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e79/0x4400 kernel/fork.c:2310
kernel_clone+0x2d7/0x940 kernel/fork.c:2769
__do_sys_clone kernel/fork.c:2911 [inline]
__se_sys_clone kernel/fork.c:2895 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2895
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: 0033:0x7fbcba9c6bd2
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:00007fbcbad4fc60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fbcbad4fc60 RCX: 00007fbcba9c6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fbcbad4fdec R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653cd7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000001a3aa5 R15: 00007fbcbad4fe40
ODEBUG: object ffffc90000a18a80 is NOT on stack ffffc90006938000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#1: syz-executor/26665
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#1: syz-executor/26665
WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#1: syz-executor/26665
Modules linked in:
CPU: 1 UID: 0 PID: 26665 Comm: syz-executor 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: cc cc cc 41 ff c7 44 89 3d 09 2a e8 15 48 c7 c1 80 b5 6d 8c 48 c7 c7 e0 b5 6d 8c 84 c0 48 0f 45 f9 48 89 de e8 4d bc 3c fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 a1 c5 6d 0a 3b 05 9f
RSP: 0018:ffffc90000a189b8 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc90000a18a80 RCX: 9c34dabcef33a600
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff8880322b9f60 R08: 0000000000000100 R09: 1ffffffff1ed22fc
R10: dffffc0000000000 R11: fffffbfff1ed22fd R12: 1ffff9200014314c
R13: ffff8880468873f0 R14: dffffc0000000000 R15: 0000000000000001
FS: 00005555653cd500(0000) GS:ffff888124dca000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000016038 CR3: 000000007418c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000800400 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x2f/0xb0 kernel/rcu/tree.c:753
Code: 57 41 56 53 65 48 ff 05 0f f4 e8 11 e8 4a 26 3a 0a 89 c3 83 f8 08 73 66 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 97 6e 8e <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b 74 8b 00
RSP: 0018:ffffc9000693f230 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000004
RDX: 0000000000000000 RSI: ffffffff8c6dac60 RDI: ffffffff8c6dac20
RBP: 0000000000000001 R08: ffffffff8243da5a R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1008bfbf1d R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8e6e97d8 R15: dffffc0000000000
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x34b/0x490 include/linux/mmzone.h:2286
page_table_check_set+0x25/0x530 mm/page_table_check.c:105
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+0x4adc/0x5c10 mm/memory.c:1490
copy_pud_range mm/memory.c:1527 [inline]
copy_p4d_range mm/memory.c:1551 [inline]
copy_page_range+0xc82/0x1290 mm/memory.c:1637
dup_mmap+0xf17/0x1dc0 mm/mmap.c:1819
dup_mm kernel/fork.c:1543 [inline]
copy_mm+0x11a/0x480 kernel/fork.c:1595
copy_process+0x1e79/0x4400 kernel/fork.c:2310
kernel_clone+0x2d7/0x940 kernel/fork.c:2769
__do_sys_clone kernel/fork.c:2911 [inline]
__se_sys_clone kernel/fork.c:2895 [inline]
__x64_sys_clone+0x1b6/0x230 kernel/fork.c:2895
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: 0033:0x7fbcba9c6bd2
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:00007fbcbad4fc60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fbcbad4fc60 RCX: 00007fbcba9c6bd2
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fbcbad4fdec R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653cd7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000001a3aa5 R15: 00007fbcbad4fe40
----------------
Code disassembly (best guess):
0: 57 push %rdi
1: 41 56 push %r14
3: 53 push %rbx
4: 65 48 ff 05 0f f4 e8 incq %gs:0x11e8f40f(%rip) # 0x11e8f41b
b: 11
c: e8 4a 26 3a 0a call 0xa3a265b
11: 89 c3 mov %eax,%ebx
13: 83 f8 08 cmp $0x8,%eax
16: 73 66 jae 0x7e
18: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
1f: fc ff df
22: 4c 8d 34 dd d0 97 6e lea -0x71916830(,%rbx,8),%r14
29: 8e
* 2a: 4c 89 f0 mov %r14,%rax <-- trapping instruction
2d: 48 c1 e8 03 shr $0x3,%rax
31: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
36: 74 08 je 0x40
38: 4c 89 f7 mov %r14,%rdi
3b: e8 2b 74 8b 00 call 0x8b746b