------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888026c28490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880
WARNING: CPU: 1 PID: 14554 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 14554 Comm: syz.4.3073 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd 60 44 16 8c 4c 89 e6 48 c7 c7 e0 38 16 8c e8 df f0 8e fc 90 <0f> 0b 90 90 58 83 05 46 57 c0 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc900006a0a28 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817a4388
RDX: ffff8880250b4880 RSI: ffffffff817a4395 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8c163f80
R13: ffffffff8baff040 R14: ffffffff8a824d40 R15: ffffc900006a0b28
FS: 00007f23123e66c0(0000) GS:ffff8880d67b1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c38db42 CR3: 000000003a7b5000 CR4: 0000000000352ef0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4695 [inline]
kfree+0x28f/0x4d0 mm/slub.c:4894
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers+0x6ef/0x960 kernel/time/timer.c:2372
__run_timer_base kernel/time/timer.c:2384 [inline]
__run_timer_base kernel/time/timer.c:2376 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2393
run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unwind_next_frame+0x1589/0x20a0 arch/x86/kernel/unwind_orc.c:648
Code: 03 0f b6 34 10 48 8d 41 03 49 89 c0 49 c1 e8 03 41 0f b6 14 10 49 89 f8 41 83 e0 07 44 38 c6 41 0f 9e c0 40 84 f6 40 0f 95 c6 <41> 84 f0 0f 85 47 08 00 00 83 e0 07 38 c2 40 0f 9e c6 84 d2 0f 95
RSP: 0018:ffffc9000670f948 EFLAGS: 00000246
RAX: ffffffff91534243 RBX: 0000000000000001 RCX: ffffffff91534240
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff91534242
RBP: ffffc9000670fa00 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000014d36 R12: ffffc9000670fa08
R13: ffffc9000670f9b8 R14: ffffc9000670ff10 R15: ffffc9000670f9ec
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4247
lsm_inode_alloc security/security.c:755 [inline]
security_inode_alloc+0x3b/0x2b0 security/security.c:1697
inode_init_always_gfp+0xce4/0x1030 fs/inode.c:306
inode_init_always include/linux/fs.h:3309 [inline]
alloc_inode+0x86/0x240 fs/inode.c:353
new_inode_pseudo include/linux/fs.h:3392 [inline]
alloc_anon_inode+0x28/0x3e0 fs/libfs.c:1653
anon_inode_make_secure_inode+0x31/0x140 fs/anon_inodes.c:119
__anon_inode_getfile+0x1cf/0x280 fs/anon_inodes.c:147
new_userfaultfd+0x25e/0x3d0 fs/userfaultfd.c:2143
__do_sys_userfaultfd fs/userfaultfd.c:2182 [inline]
__se_sys_userfaultfd fs/userfaultfd.c:2177 [inline]
__x64_sys_userfaultfd+0x4b/0xb0 fs/userfaultfd.c:2177
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f231158eec9
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:00007f23123e6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000143
RAX: ffffffffffffffda RBX: 00007f23117e6090 RCX: 00007f231158eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00007f2311611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23117e6128 R14: 00007f23117e6090 R15: 00007fff7a04f4b8
----------------
Code disassembly (best guess):
0: 03 0f add (%rdi),%ecx
2: b6 34 mov $0x34,%dh
4: 10 48 8d adc %cl,-0x73(%rax)
7: 41 03 49 89 add -0x77(%r9),%ecx
b: c0 49 c1 e8 rorb $0xe8,-0x3f(%rcx)
f: 03 41 0f add 0xf(%rcx),%eax
12: b6 14 mov $0x14,%dh
14: 10 49 89 adc %cl,-0x77(%rcx)
17: f8 clc
18: 41 83 e0 07 and $0x7,%r8d
1c: 44 38 c6 cmp %r8b,%sil
1f: 41 0f 9e c0 setle %r8b
23: 40 84 f6 test %sil,%sil
26: 40 0f 95 c6 setne %sil
* 2a: 41 84 f0 test %sil,%r8b <-- trapping instruction
2d: 0f 85 47 08 00 00 jne 0x87a
33: 83 e0 07 and $0x7,%eax
36: 38 c2 cmp %al,%dl
38: 40 0f 9e c6 setle %sil
3c: 84 d2 test %dl,%dl
3e: 0f .byte 0xf
3f: 95 xchg %eax,%ebp