=============================
[ BUG: Invalid wait context ]
6.12.0-syzkaller-08446-g228a1157fb9f #0 Not tainted
-----------------------------
syz-executor/5937 is trying to lock:
ffff88806a73aea0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88806a73aea0 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0xef/0x7f0 drivers/char/random.c:551
other info that might help us debug this:
context-{2:2}
2 locks held by syz-executor/5937:
#0: ffff888031571320 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff88806a73eb18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
stack backtrace:
CPU: 1 UID: 0 PID: 5937 Comm: syz-executor Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 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+0x878/0x3c40 kernel/locking/lockdep.c:5176
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
get_random_u8+0x107/0x7f0 drivers/char/random.c:551
get_random_u32_below include/linux/random.h:78 [inline]
kfence_guarded_alloc mm/kfence/core.c:421 [inline]
__kfence_alloc+0x4e8/0x15f0 mm/kfence/core.c:1136
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:4118 [inline]
__kmalloc_cache_noprof+0x1e4/0x300 mm/slub.c:4290
kmalloc_noprof include/linux/slab.h:879 [inline]
add_stack_record_to_list mm/page_owner.c:172 [inline]
inc_stack_record_count mm/page_owner.c:214 [inline]
__set_page_owner+0x34d/0x560 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474
__alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
stack_depot_save_flags+0x566/0x8f0 lib/stackdepot.c:627
kasan_save_stack+0x42/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
task_work_add+0xc0/0x3b0 kernel/task_work.c:77
task_tick_numa kernel/sched/fair.c:3607 [inline]
task_tick_fair+0x524/0x8e0 kernel/sched/fair.c:13054
sched_tick+0x1dd/0x4f0 kernel/sched/core.c:5652
update_process_times+0x19c/0x2d0 kernel/time/timer.c:2524
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x376/0x530 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x5fb/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:number+0x856/0xb80 lib/vsprintf.c:568
Code: 88 14 24 e8 0c 8f 78 f6 83 ed 01 31 ff 49 83 c4 01 89 ee 49 83 ed 01 e8 38 91 78 f6 83 fd ff 0f 85 6b ff ff ff 4a 8d 5c 3b 01 e5 8e 78 f6 8b 44 24 08 31 ff 44 8d 60 ff 44 89 e6 e8 13 91 78
RSP: 0018:ffffc90004a27708 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802426289c RCX: ffffffff8b15aaa8
RDX: ffff88802689c880 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff88802426289c
R13: ffffc90004a27797 R14: ffff888024263000 R15: 000000000000000f
pointer_string lib/vsprintf.c:742 [inline]
pointer+0x321/0xbf0 lib/vsprintf.c:2514
vsnprintf+0x4c4/0x1880 lib/vsprintf.c:2852
seq_vprintf fs/seq_file.c:391 [inline]
seq_printf+0x1a6/0x250 fs/seq_file.c:406
s_show+0x288/0x320 kernel/kallsyms.c:751
seq_read_iter+0xb19/0x12b0 fs/seq_file.c:272
seq_read+0x39f/0x4e0 fs/seq_file.c:162
pde_read fs/proc/inode.c:308 [inline]
proc_reg_read+0x23d/0x330 fs/proc/inode.c:320
vfs_read+0x1df/0xbe0 fs/read_write.c:563
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa53ed7d21d
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 78 48 00 00 0f 1f 84 00 00 00 00 00 80 3d 21 03 19 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffc847ce688 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055558ad62e70 RCX: 00007fa53ed7d21d
RDX: 0000000000001000 RSI: 00007fa53a4ab075 RDI: 0000000000000008
RBP: 00007ffc847ce990 R08: 0000000000da4000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 000055558ad61c70 R14: 0000000000000000 R15: 00007ffc847ce800
----------------
Code disassembly (best guess):
0: 88 14 24 mov %dl,(%rsp)
3: e8 0c 8f 78 f6 call 0xf6788f14
8: 83 ed 01 sub $0x1,%ebp
b: 31 ff xor %edi,%edi
d: 49 83 c4 01 add $0x1,%r12
11: 89 ee mov %ebp,%esi
13: 49 83 ed 01 sub $0x1,%r13
17: e8 38 91 78 f6 call 0xf6789154
1c: 83 fd ff cmp $0xffffffff,%ebp
1f: 0f 85 6b ff ff ff jne 0xffffff90
25: 4a 8d 5c 3b 01 lea 0x1(%rbx,%r15,1),%rbx
* 2a: e8 e5 8e 78 f6 call 0xf6788f14 <-- trapping instruction
2f: 8b 44 24 08 mov 0x8(%rsp),%eax
33: 31 ff xor %edi,%edi
35: 44 8d 60 ff lea -0x1(%rax),%r12d
39: 44 89 e6 mov %r12d,%esi
3c: e8 .byte 0xe8
3d: 13 .byte 0x13
3e: 91 xchg %eax,%ecx
3f: 78 .byte 0x78