=============================
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.4.3161/17342: 5, last CPU#0:
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#4: ffffc90000007cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 17342 Comm: syz.4.3161 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:check_kcov_mode kernel/kcov.c:181 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x80 kernel/kcov.c:213
Code: 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 2c <8b> 91 18 17 00 00 83 fa 02 75 21 48 8b 91 20 17 00 00 48 8b 32 48
RSP: 0018:ffffc900048c7550 EFLAGS: 00000246
RAX: ffffffff8244eaf4 RBX: ffffffff8244e85a RCX: ffff8880379d3e80
RDX: 8000000000000002 RSI: ffffffff8c6ddc60 RDI: ffffffff8c6ddc20
RBP: 0000000000000001 R08: ffffffff8244e85a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000399ee9 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000733dd R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x354/0x490 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/0x2350 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
__do_sys_exit_group kernel/exit.c:1140 [inline]
__se_sys_exit_group kernel/exit.c:1138 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1138
x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f20e7f9e559
Code: Unable to access opcode bytes at 0x7f20e7f9e52f.
RSP: 002b:00007f20e834fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20e7f9e559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f20e834fdec R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002c
R13: 00000000000927c0 R14: 00000000000bd49d R15: 00007f20e834fe40
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 17342, name: syz.4.3161
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.4.3161/17342: 5, last CPU#0:
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#4: ffffc90000007cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 17342 Comm: syz.4.3161 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:check_kcov_mode kernel/kcov.c:181 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x80 kernel/kcov.c:213
Code: 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 2c <8b> 91 18 17 00 00 83 fa 02 75 21 48 8b 91 20 17 00 00 48 8b 32 48
RSP: 0018:ffffc900048c7550 EFLAGS: 00000246
RAX: ffffffff8244eaf4 RBX: ffffffff8244e85a RCX: ffff8880379d3e80
RDX: 8000000000000002 RSI: ffffffff8c6ddc60 RDI: ffffffff8c6ddc20
RBP: 0000000000000001 R08: ffffffff8244e85a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000399ee9 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000733dd R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x354/0x490 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/0x2350 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
__do_sys_exit_group kernel/exit.c:1140 [inline]
__se_sys_exit_group kernel/exit.c:1138 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1138
x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f20e7f9e559
Code: Unable to access opcode bytes at 0x7f20e7f9e52f.
RSP: 002b:00007f20e834fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20e7f9e559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f20e834fdec R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002c
R13: 00000000000927c0 R14: 00000000000bd49d R15: 00007f20e834fe40
=============================
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.4.3161/17342: 5, last CPU#0:
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#4: ffffc90000007cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 17342 Comm: syz.4.3161 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:check_kcov_mode kernel/kcov.c:181 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x80 kernel/kcov.c:213
Code: 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 2c <8b> 91 18 17 00 00 83 fa 02 75 21 48 8b 91 20 17 00 00 48 8b 32 48
RSP: 0018:ffffc900048c7550 EFLAGS: 00000246
RAX: ffffffff8244eaf4 RBX: ffffffff8244e85a RCX: ffff8880379d3e80
RDX: 8000000000000002 RSI: ffffffff8c6ddc60 RDI: ffffffff8c6ddc20
RBP: 0000000000000001 R08: ffffffff8244e85a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000399ee9 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000733dd R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x354/0x490 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/0x2350 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
__do_sys_exit_group kernel/exit.c:1140 [inline]
__se_sys_exit_group kernel/exit.c:1138 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1138
x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f20e7f9e559
Code: Unable to access opcode bytes at 0x7f20e7f9e52f.
RSP: 002b:00007f20e834fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20e7f9e559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f20e834fdec R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002c
R13: 00000000000927c0 R14: 00000000000bd49d R15: 00007f20e834fe40
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 17342, name: syz.4.3161
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.4.3161/17342: 5, last CPU#0:
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88801c096540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1a4/0x9f0 mm/mmap.c:1299
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:290
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888075213738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff8fd5c9a0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490 include/linux/mmzone.h:2276
#4: ffffc90000007cc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 17342 Comm: syz.4.3161 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:check_kcov_mode kernel/kcov.c:181 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x80 kernel/kcov.c:213
Code: 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 2c <8b> 91 18 17 00 00 83 fa 02 75 21 48 8b 91 20 17 00 00 48 8b 32 48
RSP: 0018:ffffc900048c7550 EFLAGS: 00000246
RAX: ffffffff8244eaf4 RBX: ffffffff8244e85a RCX: ffff8880379d3e80
RDX: 8000000000000002 RSI: ffffffff8c6ddc60 RDI: ffffffff8c6ddc20
RBP: 0000000000000001 R08: ffffffff8244e85a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000399ee9 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000733dd R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x354/0x490 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/0x2350 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
__do_sys_exit_group kernel/exit.c:1140 [inline]
__se_sys_exit_group kernel/exit.c:1138 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1138
x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f20e7f9e559
Code: Unable to access opcode bytes at 0x7f20e7f9e52f.
RSP: 002b:00007f20e834fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20e7f9e559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f20e834fdec R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002c
R13: 00000000000927c0 R14: 00000000000bd49d R15: 00007f20e834fe40
ODEBUG: object ffffc90000007a80 is NOT on stack ffffc900048c0000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#0: syz.4.3161/17342
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc lib/debugobjects.c:705 [inline], CPU#0: syz.4.3161/17342
WARNING: lib/debugobjects.c:672 at __debug_object_init+0x2c4/0x3c0 lib/debugobjects.c:798, CPU#0: syz.4.3161/17342
Modules linked in:
CPU: 0 UID: 0 PID: 17342 Comm: syz.4.3161 Tainted: G W L syzkaller #0 PREEMPT(full)
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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 c9 83 e7 16 48 c7 c1 80 e5 6d 8c 48 c7 c7 e0 e5 6d 8c 84 c0 48 0f 45 f9 48 89 de e8 4d 6c 3b fc 90 <0f> 0b 90 e9 c0 fe ff ff e8 4f 1c 00 00 8b 05 21 82 6c 0b 3b 05 1f
RSP: 0018:ffffc900000079b8 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc90000007a80 RCX: ca7061ad004f3600
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff8880379d3ea0 R08: 0000000000000100 R09: 1ffffffff20d24e0
R10: dffffc0000000000 R11: fffffbfff20d24e1 R12: ffff888020f2b210
R13: ffff8880134d49a0 R14: dffffc0000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff888123abf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000b2030 CR3: 000000000fb48000 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:check_kcov_mode kernel/kcov.c:181 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x49/0x80 kernel/kcov.c:213
Code: 29 89 d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00 00 10 0f 93 c2 40 08 f2 75 35 83 b9 44 17 00 00 00 74 2c <8b> 91 18 17 00 00 83 fa 02 75 21 48 8b 91 20 17 00 00 48 8b 32 48
RSP: 0018:ffffc900048c7550 EFLAGS: 00000246
RAX: ffffffff8244eaf4 RBX: ffffffff8244e85a RCX: ffff8880379d3e80
RDX: 8000000000000002 RSI: ffffffff8c6ddc60 RDI: ffffffff8c6ddc20
RBP: 0000000000000001 R08: ffffffff8244e85a R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000399ee9 R12: dffffc0000000000
R13: 0000000000000008 R14: 00000000000733dd R15: 0000000000000001
rcu_read_unlock_sched include/linux/rcupdate.h:969 [inline]
pfn_valid+0x354/0x490 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/0x2350 kernel/exit.c:974
do_group_exit+0x22d/0x2f0 kernel/exit.c:1129
__do_sys_exit_group kernel/exit.c:1140 [inline]
__se_sys_exit_group kernel/exit.c:1138 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1138
x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f20e7f9e559
Code: Unable to access opcode bytes at 0x7f20e7f9e52f.
RSP: 002b:00007f20e834fd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f20e7f9e559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f20e834fdec R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000002c
R13: 00000000000927c0 R14: 00000000000bd49d R15: 00007f20e834fe40
----------------
Code disassembly (best guess):
0: 29 89 d6 81 e6 00 sub %ecx,0xe681d6(%rcx)
6: 01 00 add %eax,(%rax)
8: 0f 81 fe 00 01 00 jno 0x1010c
e: 00 40 0f add %al,0xf(%rax)
11: 95 xchg %eax,%ebp
12: c6 81 fa 00 00 00 10 movb $0x10,0xfa(%rcx)
19: 0f 93 c2 setae %dl
1c: 40 08 f2 or %sil,%dl
1f: 75 35 jne 0x56
21: 83 b9 44 17 00 00 00 cmpl $0x0,0x1744(%rcx)
28: 74 2c je 0x56
* 2a: 8b 91 18 17 00 00 mov 0x1718(%rcx),%edx <-- trapping instruction
30: 83 fa 02 cmp $0x2,%edx
33: 75 21 jne 0x56
35: 48 8b 91 20 17 00 00 mov 0x1720(%rcx),%rdx
3c: 48 8b 32 mov (%rdx),%rsi
3f: 48 rex.W