=============================
[ BUG: Invalid wait context ]
6.12.0-rc5-next-20241031-syzkaller #0 Not tainted
-----------------------------
syz.0.54/6211 is trying to lock:
ffffffff8ea733d8 (stack_list_lock){-.-.}-{3:3}, at: add_stack_record_to_list mm/page_owner.c:182 [inline]
ffffffff8ea733d8 (stack_list_lock){-.-.}-{3:3}, at: inc_stack_record_count mm/page_owner.c:214 [inline]
ffffffff8ea733d8 (stack_list_lock){-.-.}-{3:3}, at: __set_page_owner+0x5cb/0x800 mm/page_owner.c:329
other info that might help us debug this:
context-{2:2}
1 lock held by syz.0.54/6211:
#0: ffffffff8f18d4a8 (reading_mutex){+.+.}-{4:4}, at: rng_dev_read+0x16e/0x710 drivers/char/hw_random/core.c:225
stack backtrace:
CPU: 0 UID: 0 PID: 6211 Comm: syz.0.54 Not tainted 6.12.0-rc5-next-20241031-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline]
check_wait_context kernel/locking/lockdep.c:4898 [inline]
__lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
add_stack_record_to_list mm/page_owner.c:182 [inline]
inc_stack_record_count mm/page_owner.c:214 [inline]
__set_page_owner+0x5cb/0x800 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1541
prep_new_page mm/page_alloc.c:1549 [inline]
get_page_from_freelist+0x3725/0x3870 mm/page_alloc.c:3495
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4771
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
stack_depot_save_flags+0x666/0x830 lib/stackdepot.c:627
kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
task_work_add+0xd9/0x490 kernel/task_work.c:77
__run_posix_cpu_timers kernel/time/posix-cpu-timers.c:1219 [inline]
run_posix_cpu_timers+0x6ac/0x810 kernel/time/posix-cpu-timers.c:1418
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x551/0xd50 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__outw arch/x86/include/asm/shared/io.h:23 [inline]
RIP: 0010:iowrite16+0x37/0x90 lib/iomap.c:213
Code: cd dc fc 48 81 fb 00 00 04 00 72 0a e8 b2 cd dc fc 66 89 2b eb 59 48 81 fb 01 00 01 00 72 0d e8 9f cd dc fc 89 e8 89 da 66 ef 43 8b 2d c1 ea 50 0a 31 ff 89 ee e8 c8 d1 dc fc 85 ed 74 2b e8
RSP: 0018:ffffc9000485f928 EFLAGS: 00000287
RAX: 0000000000000000 RBX: 000000000001c0b0 RCX: 0000000000040000
RDX: 000000000001c0b0 RSI: 000000000000528c RDI: 000000000000528d
RBP: 0000000000000000 R08: ffffffff852bb010 R09: 1ffffffff203a076
R10: dffffc0000000000 R11: ffffffff852d0d60 R12: dffffc0000000000
R13: 000000000000280d R14: dffffc0000000000 R15: ffff888140afca00
vp_notify+0x57/0x80 drivers/virtio/virtio_pci_common.c:45
virtqueue_notify drivers/virtio/virtio_ring.c:2370 [inline]
virtqueue_kick+0x39b/0x5c0 drivers/virtio/virtio_ring.c:2393
request_entropy drivers/char/hw_random/virtio-rng.c:63 [inline]
copy_data+0x237/0x370 drivers/char/hw_random/virtio-rng.c:74
virtio_read+0xcb/0x200 drivers/char/hw_random/virtio-rng.c:92
rng_get_data drivers/char/hw_random/core.c:187 [inline]
rng_dev_read+0x240/0x710 drivers/char/hw_random/core.c:230
do_loop_readv_writev fs/read_write.c:854 [inline]
vfs_readv+0x6bc/0xa80 fs/read_write.c:1027
do_preadv fs/read_write.c:1142 [inline]
__do_sys_preadv fs/read_write.c:1192 [inline]
__se_sys_preadv fs/read_write.c:1187 [inline]
__x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1187
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f383657e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f38363f9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f3836735f80 RCX: 00007f383657e719
RDX: 0000000000000001 RSI: 0000000020000500 RDI: 0000000000000008
RBP: 00007f38365f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3836735f80 R15: 00007ffdbf18b198
vkms_vblank_simulate: vblank timer overrun
----------------
Code disassembly (best guess):
0: cd dc int $0xdc
2: fc cld
3: 48 81 fb 00 00 04 00 cmp $0x40000,%rbx
a: 72 0a jb 0x16
c: e8 b2 cd dc fc call 0xfcdccdc3
11: 66 89 2b mov %bp,(%rbx)
14: eb 59 jmp 0x6f
16: 48 81 fb 01 00 01 00 cmp $0x10001,%rbx
1d: 72 0d jb 0x2c
1f: e8 9f cd dc fc call 0xfcdccdc3
24: 89 e8 mov %ebp,%eax
26: 89 da mov %ebx,%edx
28: 66 ef out %ax,(%dx)
* 2a: eb 43 jmp 0x6f <-- trapping instruction
2c: 8b 2d c1 ea 50 0a mov 0xa50eac1(%rip),%ebp # 0xa50eaf3
32: 31 ff xor %edi,%edi
34: 89 ee mov %ebp,%esi
36: e8 c8 d1 dc fc call 0xfcdcd203
3b: 85 ed test %ebp,%ebp
3d: 74 2b je 0x6a
3f: e8 .byte 0xe8