=============================
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.0.703/8290: 5, last CPU#1:
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#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: 8290 Comm: syz.0.703 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:__sanitizer_cov_trace_const_cmp4+0x9e/0xb0 kernel/kcov.c:312
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 05 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc90003967310 EFLAGS: 00000293
RAX: ffffffff8243edd2 RBX: ffffffff8243eb4a RCX: ffff88802e591f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243eb4a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328df1 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000651be R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x342/0x490 include/linux/mmzone.h:2286
page_table_check_clear+0x21/0x500 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f052779e159
Code: Unable to access opcode bytes at 0x7f052779e12f.
RSP: 002b:00007f05285b1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: fffffffffffffffe RBX: 00007f0527a25fa0 RCX: 00007f052779e159
RDX: 0000000000000001 RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f052783506b R08: 00000000fffffbff R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0527a26038 R14: 00007f0527a25fa0 R15: 00007f0527b4fa48
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8290, name: syz.0.703
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.0.703/8290: 5, last CPU#1:
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#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: 8290 Comm: syz.0.703 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:__sanitizer_cov_trace_const_cmp4+0x9e/0xb0 kernel/kcov.c:312
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 05 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc90003967310 EFLAGS: 00000293
RAX: ffffffff8243edd2 RBX: ffffffff8243eb4a RCX: ffff88802e591f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243eb4a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328df1 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000651be R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x342/0x490 include/linux/mmzone.h:2286
page_table_check_clear+0x21/0x500 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f052779e159
Code: Unable to access opcode bytes at 0x7f052779e12f.
RSP: 002b:00007f05285b1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: fffffffffffffffe RBX: 00007f0527a25fa0 RCX: 00007f052779e159
RDX: 0000000000000001 RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f052783506b R08: 00000000fffffbff R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0527a26038 R14: 00007f0527a25fa0 R15: 00007f0527b4fa48
=============================
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.0.703/8290: 5, last CPU#1:
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#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: 8290 Comm: syz.0.703 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x9e/0xb0 kernel/kcov.c:312
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 05 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc90003967310 EFLAGS: 00000293
RAX: ffffffff8243edd2 RBX: ffffffff8243eb4a RCX: ffff88802e591f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243eb4a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328df1 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000651be R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x342/0x490 include/linux/mmzone.h:2286
page_table_check_clear+0x21/0x500 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f052779e159
Code: Unable to access opcode bytes at 0x7f052779e12f.
RSP: 002b:00007f05285b1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: fffffffffffffffe RBX: 00007f0527a25fa0 RCX: 00007f052779e159
RDX: 0000000000000001 RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f052783506b R08: 00000000fffffbff R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0527a26038 R14: 00007f0527a25fa0 R15: 00007f0527b4fa48
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 8290, name: syz.0.703
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.0.703/8290: 5, last CPU#1:
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888028084080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff8880341aba98 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8ed5c960 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#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: 8290 Comm: syz.0.703 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:__sanitizer_cov_trace_const_cmp4+0x9e/0xb0 kernel/kcov.c:312
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 05 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc90003967310 EFLAGS: 00000293
RAX: ffffffff8243edd2 RBX: ffffffff8243eb4a RCX: ffff88802e591f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243eb4a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328df1 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000651be R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x342/0x490 include/linux/mmzone.h:2286
page_table_check_clear+0x21/0x500 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f052779e159
Code: Unable to access opcode bytes at 0x7f052779e12f.
RSP: 002b:00007f05285b1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: fffffffffffffffe RBX: 00007f0527a25fa0 RCX: 00007f052779e159
RDX: 0000000000000001 RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f052783506b R08: 00000000fffffbff R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0527a26038 R14: 00007f0527a25fa0 R15: 00007f0527b4fa48
ODEBUG: object ffffc90000a18a80 is NOT on stack ffffc90003960000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#1: syz.0.703/8290
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#1: syz.0.703/8290
WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#1: syz.0.703/8290
Modules linked in:
CPU: 1 UID: 0 PID: 8290 Comm: syz.0.703 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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 89 3e 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 cd a0 3c fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 a1 a9 6d 0a 3b 05 9f
RSP: 0018:ffffc90000a189b8 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc90000a18a80 RCX: 12303bfe5ef7dc00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff88802e591f60 R08: 0000000000000100 R09: 0000000000000001
R10: dffffc0000000000 R11: fffff520001430b9 R12: ffff88805a53a3d0
R13: ffff88802aec9850 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888124dc7000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c4280bf CR3: 000000005d6ea000 CR4: 00000000003526f0
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:__sanitizer_cov_trace_const_cmp4+0x9e/0xb0 kernel/kcov.c:312
Code: 8d 51 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 02 48 c7 44 0a 08 05 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc90003967310 EFLAGS: 00000293
RAX: ffffffff8243edd2 RBX: ffffffff8243eb4a RCX: ffff88802e591f40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8243eb4a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000328df1 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000651be R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x342/0x490 include/linux/mmzone.h:2286
page_table_check_clear+0x21/0x500 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x3a12/0x4f80 mm/memory.c:2240
unmap_vmas+0x390/0x550 mm/memory.c:2309
exit_mmap+0x293/0x9f0 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1193
exit_mm+0x18e/0x240 kernel/exit.c:592
do_exit+0x6cd/0x2360 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
get_signal+0x121b/0x12c0 kernel/signal.c:3112
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f052779e159
Code: Unable to access opcode bytes at 0x7f052779e12f.
RSP: 002b:00007f05285b1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: fffffffffffffffe RBX: 00007f0527a25fa0 RCX: 00007f052779e159
RDX: 0000000000000001 RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f052783506b R08: 00000000fffffbff R09: 0000000000000000
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0527a26038 R14: 00007f0527a25fa0 R15: 00007f0527b4fa48
----------------
Code disassembly (best guess):
0: 8d 51 28 lea 0x28(%rcx),%edx
3: 4d 39 ca cmp %r9,%r10
6: 77 22 ja 0x2a
8: 89 ff mov %edi,%edi
a: 89 f6 mov %esi,%esi
c: 49 ff c0 inc %r8
f: 4c 89 02 mov %r8,(%rdx)
12: 48 c7 44 0a 08 05 00 movq $0x5,0x8(%rdx,%rcx,1)
19: 00 00
1b: 48 89 7c 0a 10 mov %rdi,0x10(%rdx,%rcx,1)
20: 48 89 74 0a 18 mov %rsi,0x18(%rdx,%rcx,1)
25: 48 89 44 0a 20 mov %rax,0x20(%rdx,%rcx,1)
* 2a: c3 ret <-- trapping instruction
2b: cc int3
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 66 66 2e 0f 1f 84 data16 data16 cs nopw 0x0(%rax,%rax,1)
37: 00 00 00 00 00
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop