=============================
[ BUG: Invalid wait context ]
6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #0 Not tainted
-----------------------------
syz-executor/5890 is trying to lock:
ffff88802b73b0a0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88802b73b0a0 (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/5890:
#0: ffff88801ea0a790 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff88802b73ed18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
stack backtrace:
CPU: 3 UID: 0 PID: 5890 Comm: syz-executor Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #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:4152 [inline]
__kmalloc_cache_noprof+0x125/0x420 mm/slub.c:4324
kmalloc_noprof include/linux/slab.h:901 [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+0x50f/0x790 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
stack_depot_save_flags+0x8e0/0x9e0 lib/stackdepot.c:627
kasan_save_stack+0x42/0x60 mm/kasan/common.c:48
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544
task_work_add+0xc0/0x3b0 kernel/task_work.c:77
task_tick_numa kernel/sched/fair.c:3616 [inline]
task_tick_fair+0x524/0x8e0 kernel/sched/fair.c:13101
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:kallsyms_expand_symbol.constprop.0+0x1f2/0x310 kernel/kallsyms.c:77
Code: 48 c1 e8 03 83 e2 07 42 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 d0 00 00 00 0f b6 2b 31 ff 41 bc 01 00 00 00 89 ee e8 ce 8b 0b 00 <40> 84 ed 0f 85 5f ff ff ff e8 e0 89 0b 00 31 ff 83 6c 24 08 01 8b
RSP: 0018:ffffc900034f7a20 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffffff8d1d384b RCX: ffffffff818dc562
RDX: ffff8880206e4880 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000063 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000063 R11: 0000000000000000 R12: 0000000000000001
R13: ffff888022d9383a R14: 00000000000001f3 R15: dffffc0000000000
get_ksymbol_core kernel/kallsyms.c:650 [inline]
update_iter+0x288/0x860 kernel/kallsyms.c:702
s_next+0x67/0xb0 kernel/kallsyms.c:712
seq_read_iter+0xa10/0x12b0 fs/seq_file.c:262
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_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70de579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffa5ddf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00000000f46f138d
RDX: 0000000000001000 RSI: 00000000f7413ff4 RDI: 000000005707ee44
RBP: 00000000ffa5de58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 48 c1 e8 03 shr $0x3,%rax
4: 83 e2 07 and $0x7,%edx
7: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
c: 38 d0 cmp %dl,%al
e: 7f 08 jg 0x18
10: 84 c0 test %al,%al
12: 0f 85 d0 00 00 00 jne 0xe8
18: 0f b6 2b movzbl (%rbx),%ebp
1b: 31 ff xor %edi,%edi
1d: 41 bc 01 00 00 00 mov $0x1,%r12d
23: 89 ee mov %ebp,%esi
25: e8 ce 8b 0b 00 call 0xb8bf8
* 2a: 40 84 ed test %bpl,%bpl <-- trapping instruction
2d: 0f 85 5f ff ff ff jne 0xffffff92
33: e8 e0 89 0b 00 call 0xb8a18
38: 31 ff xor %edi,%edi
3a: 83 6c 24 08 01 subl $0x1,0x8(%rsp)
3f: 8b .byte 0x8b