syzbot

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DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 5181 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline]
WARNING: CPU: 0 PID: 5181 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4850 [inline]
WARNING: CPU: 0 PID: 5181 at kernel/locking/lockdep.c:232 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5176
Modules linked in:
CPU: 0 UID: 0 PID: 5181 Comm: syslogd Not tainted 6.13.0-rc3-syzkaller-00209-g499551201b5f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4850 [inline]
RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5176
Code: 00 00 83 3d e1 f5 9e 0e 00 75 23 90 48 c7 c7 00 96 0a 8c 48 c7 c6 00 99 0a 8c e8 67 5d e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc9000459f170 EFLAGS: 00010046
RAX: ce2ce462ec202700 RBX: 00000000000019d8 RCX: ffff88807efa0000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000c19d8 R08: ffffffff81601a42 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff88807efa0ac4
R13: 0000000000000005 R14: 1ffff1100fdf4165 R15: ffff88807efa0b28
FS:  00007f0e35027380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc247125d58 CR3: 000000002f376000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
 raw_spin_rq_lock kernel/sched/sched.h:1523 [inline]
 rq_lock kernel/sched/sched.h:1822 [inline]
 __schedule+0x35a/0x4c30 kernel/sched/core.c:6680
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x86/0x290 mm/kasan/generic.c:189
Code: 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 <0f> 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 00 45 89 dc
RSP: 0018:ffffc9000459f7c0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff11006768a5c RCX: ffffffff898b56ac
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888033b452e0
RBP: ffffffffffffffff R08: ffff888033b452e7 R09: 1ffff11006768a5c
R10: dffffc0000000000 R11: ffffed1006768a5c R12: ffff888033b452e0
R13: 0000000000000300 R14: dffffc0000000001 R15: ffffed1006768a5d
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 sock_flag include/net/sock.h:992 [inline]
 sock_wfree+0x6c/0x7b0 net/core/sock.c:2555
 unix_destruct_scm+0x1c6/0x210 net/unix/af_unix.c:1884
 skb_release_head_state+0x102/0x250 net/core/skbuff.c:1177
 skb_release_all net/core/skbuff.c:1188 [inline]
 __kfree_skb net/core/skbuff.c:1204 [inline]
 consume_skb+0x60/0xf0 net/core/skbuff.c:1436
 __unix_dgram_recvmsg+0xcea/0x12f0 net/unix/af_unix.c:2521
 sock_recvmsg_nosec net/socket.c:1033 [inline]
 sock_recvmsg+0x231/0x280 net/socket.c:1055
 sock_read_iter+0x2c4/0x3d0 net/socket.c:1125
 new_sync_read fs/read_write.c:484 [inline]
 vfs_read+0x993/0xb70 fs/read_write.c:565
 ksys_read+0x18f/0x2b0 fs/read_write.c:708
 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: 0033:0x7f0e3517bb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd5fefd918 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0e3517bb6a
RDX: 00000000000000ff RSI: 000055b5f4188950 RDI: 0000000000000000
RBP: 000055b5f4188910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f0e3531a3a3 R11: 0000000000000246 R12: 000055b5f41889a4
R13: 000055b5f4188950 R14: 0000000000000000 R15: 00007f0e3535ea80
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	df 4f 8d             	fisttps -0x73(%rdi)
   3:	3c 31                	cmp    $0x31,%al
   5:	4c 89 fd             	mov    %r15,%rbp
   8:	4c 29 dd             	sub    %r11,%rbp
   b:	48 83 fd 10          	cmp    $0x10,%rbp
   f:	7f 29                	jg     0x3a
  11:	48 85 ed             	test   %rbp,%rbp
  14:	0f 84 3e 01 00 00    	je     0x158
  1a:	4c 89 cd             	mov    %r9,%rbp
  1d:	48 f7 d5             	not    %rbp
  20:	48 01 dd             	add    %rbx,%rbp
  23:	41 80 3b 00          	cmpb   $0x0,(%r11)
* 27:	0f 85 c9 01 00 00    	jne    0x1f6 <-- trapping instruction
  2d:	49 ff c3             	inc    %r11
  30:	48 ff c5             	inc    %rbp
  33:	75 ee                	jne    0x23
  35:	e9 1e 01 00 00       	jmp    0x158
  3a:	45 89 dc             	mov    %r11d,%r12d