=============================
WARNING: suspicious RCU usage
syzkaller #0 Not tainted
-----------------------------
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.3.2787/16404: 5, last CPU#0:
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa00 mm/mmap.c:1299
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
#4: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 16404 Comm: syz.3.2787 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6972
__might_resched+0x2d9/0x330 kernel/sched/core.c:9226
__cancel_work_sync kernel/workqueue.c:4561 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
RIP: 0010:pfn_valid+0xe9/0x4b0 include/linux/mmzone.h:2276
Code: c9 45 31 c0 b9 02 00 00 00 31 d2 31 f6 48 c7 c7 60 6e 8e 89 e8 28 a3 6b ff e8 b3 bb 64 05 31 ff 41 89 c4 89 c6 e8 67 d8 8f ff <58> 45 85 e4 0f 85 d9 01 00 00 e8 e8 dd 8f ff 48 85 ed 0f 84 69 01
RSP: 0018:ffffc90001757488 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000125cfc RCX: ffffffff82255059
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88812105bc80
RBP: ffff88823ff13480 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88823ff14000 R14: ffff888121a43918 R15: 8000000125cfc007
page_table_check_clear+0x21/0x540 mm/page_table_check.c:70
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [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+0x25e1/0x4090 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 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+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c7bcf559
Code: Unable to access opcode bytes at 0x7f81c7bcf52f.
RSP: 002b:00007f81c65fe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f81c7e56098 RCX: 00007f81c7bcf559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f81c7e56098
RBP: 00007f81c7e56090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81c7e56128 R14: 00007ffced887cf0 R15: 00007ffced887dd8
BUG: sleeping function called from invalid context at kernel/workqueue.c:4561
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 16404, name: syz.3.2787
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.3.2787/16404: 5, last CPU#0:
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa00 mm/mmap.c:1299
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
#4: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 16404 Comm: syz.3.2787 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264
__cancel_work_sync kernel/workqueue.c:4561 [inline]
cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4642
mmc_free_host+0x19/0x40 drivers/mmc/core/host.c:700
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
RIP: 0010:pfn_valid+0xe9/0x4b0 include/linux/mmzone.h:2276
Code: c9 45 31 c0 b9 02 00 00 00 31 d2 31 f6 48 c7 c7 60 6e 8e 89 e8 28 a3 6b ff e8 b3 bb 64 05 31 ff 41 89 c4 89 c6 e8 67 d8 8f ff <58> 45 85 e4 0f 85 d9 01 00 00 e8 e8 dd 8f ff 48 85 ed 0f 84 69 01
RSP: 0018:ffffc90001757488 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000125cfc RCX: ffffffff82255059
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88812105bc80
RBP: ffff88823ff13480 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88823ff14000 R14: ffff888121a43918 R15: 8000000125cfc007
page_table_check_clear+0x21/0x540 mm/page_table_check.c:70
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [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+0x25e1/0x4090 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 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+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c7bcf559
Code: Unable to access opcode bytes at 0x7f81c7bcf52f.
RSP: 002b:00007f81c65fe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f81c7e56098 RCX: 00007f81c7bcf559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f81c7e56098
RBP: 00007f81c7e56090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81c7e56128 R14: 00007ffced887cf0 R15: 00007ffced887dd8
=============================
WARNING: suspicious RCU usage
syzkaller #0 Tainted: G W
-----------------------------
kernel/rcu/srcutree.c:1464 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.3.2787/16404: 5, last CPU#0:
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa00 mm/mmap.c:1299
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
#4: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
stack backtrace:
CPU: 0 UID: 0 PID: 16404 Comm: syz.3.2787 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
lockdep_rcu_suspicious.cold+0x4f/0xb2 kernel/locking/lockdep.c:6972
__synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1464
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
RIP: 0010:pfn_valid+0xe9/0x4b0 include/linux/mmzone.h:2276
Code: c9 45 31 c0 b9 02 00 00 00 31 d2 31 f6 48 c7 c7 60 6e 8e 89 e8 28 a3 6b ff e8 b3 bb 64 05 31 ff 41 89 c4 89 c6 e8 67 d8 8f ff <58> 45 85 e4 0f 85 d9 01 00 00 e8 e8 dd 8f ff 48 85 ed 0f 84 69 01
RSP: 0018:ffffc90001757488 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000125cfc RCX: ffffffff82255059
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88812105bc80
RBP: ffff88823ff13480 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88823ff14000 R14: ffff888121a43918 R15: 8000000125cfc007
page_table_check_clear+0x21/0x540 mm/page_table_check.c:70
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [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+0x25e1/0x4090 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 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+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c7bcf559
Code: Unable to access opcode bytes at 0x7f81c7bcf52f.
RSP: 002b:00007f81c65fe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f81c7e56098 RCX: 00007f81c7bcf559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f81c7e56098
RBP: 00007f81c7e56090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81c7e56128 R14: 00007ffced887cf0 R15: 00007ffced887dd8
BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1472
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 16404, name: syz.3.2787
preempt_count: 102, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz.3.2787/16404: 5, last CPU#0:
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff888114069b40 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x124/0xa00 mm/mmap.c:1299
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff898e6f20 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
#2: ffff888135e2f738 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:947 [inline]
#3: ffffffff898e6e60 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4b0 include/linux/mmzone.h:2276
#4: ffffc90000007c98 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11d/0x5f0 kernel/time/timer.c:1745
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 16404 Comm: syz.3.2787 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
__might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9264
__synchronize_srcu+0x13c/0x300 kernel/rcu/srcutree.c:1472
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
RIP: 0010:pfn_valid+0xe9/0x4b0 include/linux/mmzone.h:2276
Code: c9 45 31 c0 b9 02 00 00 00 31 d2 31 f6 48 c7 c7 60 6e 8e 89 e8 28 a3 6b ff e8 b3 bb 64 05 31 ff 41 89 c4 89 c6 e8 67 d8 8f ff <58> 45 85 e4 0f 85 d9 01 00 00 e8 e8 dd 8f ff 48 85 ed 0f 84 69 01
RSP: 0018:ffffc90001757488 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000125cfc RCX: ffffffff82255059
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88812105bc80
RBP: ffff88823ff13480 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88823ff14000 R14: ffff888121a43918 R15: 8000000125cfc007
page_table_check_clear+0x21/0x540 mm/page_table_check.c:70
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [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+0x25e1/0x4090 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 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+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c7bcf559
Code: Unable to access opcode bytes at 0x7f81c7bcf52f.
RSP: 002b:00007f81c65fe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f81c7e56098 RCX: 00007f81c7bcf559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f81c7e56098
RBP: 00007f81c7e56090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81c7e56128 R14: 00007ffced887cf0 R15: 00007ffced887dd8
ODEBUG: object ffffc90000007a60 is NOT on stack ffffc90001750000, but annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:672 at debug_object_is_on_stack lib/debugobjects.c:672 [inline], CPU#0: syz.3.2787/16404
WARNING: lib/debugobjects.c:672 at lookup_object_or_alloc.part.0.cold+0x19/0x40 lib/debugobjects.c:705, CPU#0: syz.3.2787/16404
Modules linked in:
CPU: 0 UID: 0 PID: 16404 Comm: syz.3.2787 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
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.part.0.cold+0x19/0x40 lib/debugobjects.c:705
Code: c4 60 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 83 c5 01 89 2d 60 8b 0f 13 4c 89 e6 48 c7 c7 c0 c8 d2 87 e8 21 c2 fa ff 90 <0f> 0b 90 e9 b2 e0 bb 01 83 c5 01 89 2d 3f 8b 0f 13 49 39 c4 73 da
RSP: 0018:ffffc900000078f0 EFLAGS: 00010082
RAX: 0000000000000050 RBX: ffff888112e58f50 RCX: 0000000000000000
RDX: 0000000000000050 RSI: ffffffff8193b6e9 RDI: fffff52000000f0f
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000103 R11: 0000000000000001 R12: ffffc90000007a60
R13: ffff88812105bc80 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8882683d5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde1b7586c0 CR3: 0000000124780000 CR4: 00000000003506f0
Call Trace:
lookup_object_or_alloc lib/debugobjects.c:682 [inline]
__debug_object_init+0x2a9/0x3d0 lib/debugobjects.c:798
__synchronize_srcu+0x1c3/0x300 kernel/rcu/srcutree.c:1475
wakeup_source_remove drivers/base/power/wakeup.c:201 [inline]
wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237
wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236
mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69
device_release+0xd2/0x270 drivers/base/core.c:2640
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1f7/0x640 lib/kobject.c:737
put_device+0x1f/0x30 drivers/base/core.c:3884
vub300_delete drivers/mmc/host/vub300.c:379 [inline]
kref_put include/linux/kref.h:65 [inline]
vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline]
vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742
call_timer_fn+0x198/0x5f0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xb00 kernel/time/timer.c:2374
__run_timer_base kernel/time/timer.c:2386 [inline]
__run_timer_base kernel/time/timer.c:2378 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2395
run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 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+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:948 [inline]
RIP: 0010:pfn_valid+0xe9/0x4b0 include/linux/mmzone.h:2276
Code: c9 45 31 c0 b9 02 00 00 00 31 d2 31 f6 48 c7 c7 60 6e 8e 89 e8 28 a3 6b ff e8 b3 bb 64 05 31 ff 41 89 c4 89 c6 e8 67 d8 8f ff <58> 45 85 e4 0f 85 d9 01 00 00 e8 e8 dd 8f ff 48 85 ed 0f 84 69 01
RSP: 0018:ffffc90001757488 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000125cfc RCX: ffffffff82255059
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff88812105bc80
RBP: ffff88823ff13480 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: ffff88823ff14000 R14: ffff888121a43918 R15: 8000000125cfc007
page_table_check_clear+0x21/0x540 mm/page_table_check.c:70
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [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+0x25e1/0x4090 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 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+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c7bcf559
Code: Unable to access opcode bytes at 0x7f81c7bcf52f.
RSP: 002b:00007f81c65fe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f81c7e56098 RCX: 00007f81c7bcf559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f81c7e56098
RBP: 00007f81c7e56090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81c7e56128 R14: 00007ffced887cf0 R15: 00007ffced887dd8
----------------
Code disassembly (best guess):
0: c9 leave
1: 45 31 c0 xor %r8d,%r8d
4: b9 02 00 00 00 mov $0x2,%ecx
9: 31 d2 xor %edx,%edx
b: 31 f6 xor %esi,%esi
d: 48 c7 c7 60 6e 8e 89 mov $0xffffffff898e6e60,%rdi
14: e8 28 a3 6b ff call 0xff6ba341
19: e8 b3 bb 64 05 call 0x564bbd1
1e: 31 ff xor %edi,%edi
20: 41 89 c4 mov %eax,%r12d
23: 89 c6 mov %eax,%esi
25: e8 67 d8 8f ff call 0xff8fd891
* 2a: 58 pop %rax <-- trapping instruction
2b: 45 85 e4 test %r12d,%r12d
2e: 0f 85 d9 01 00 00 jne 0x20d
34: e8 e8 dd 8f ff call 0xff8fde21
39: 48 85 ed test %rbp,%rbp
3c: 0f .byte 0xf
3d: 84 69 01 test %ch,0x1(%rcx)