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ODEBUG: free active (active state 0) object: ffff88803f4d2090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2942
WARNING: lib/debugobjects.c:629 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:629, CPU#2: syz.1.11287/7248
Modules linked in:
CPU: 2 UID: 0 PID: 7248 Comm: syz.1.11287 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:debug_print_object+0x19b/0x2a0 lib/debugobjects.c:629
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d f2 18 e4 0b 41 56 48 8b 14 dd c0 33 1c 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 0c c5 d9 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90005ba7808 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8c1c3300 RSI: ffffffff8c1c2f20 RDI: ffffffff90e6aac0
RBP: 0000000000000001 R08: ffff88803f4d2090 R09: ffffffff8bb2c6e0
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c1c2f20
R13: ffffffff8bb2c720 R14: ffffffff8a84b230 R15: ffffc90005ba7908
FS: 0000000000000000(0000) GS:ffff8880d64db000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555594c2f9e8 CR3: 0000000039419000 CR4: 0000000000352ef0
Call Trace:
<TASK>
__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
debug_check_no_obj_freed+0x4da/0x630 lib/debugobjects.c:1146
slab_free_hook mm/slub.c:2620 [inline]
slab_free mm/slub.c:6246 [inline]
kfree+0x3d0/0x6c0 mm/slub.c:6561
rose_neigh_put include/net/rose.h:166 [inline]
rose_neigh_put include/net/rose.h:160 [inline]
rose_release+0x60b/0x740 net/rose/af_rose.c:658
__sock_release+0xb3/0x260 net/socket.c:722
sock_close+0x1c/0x30 net/socket.c:1514
__fput+0x3ff/0xb50 fs/file_table.c:510
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x8d2/0x2a60 kernel/exit.c:975
do_group_exit+0xd5/0x2a0 kernel/exit.c:1117
get_signal+0x1ec7/0x21e0 kernel/signal.c:3037
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x706/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: eccb:0xe4a421182f13d611
Code: Unable to access opcode bytes at 0xe4a421182f13d5e7.
RSP: 002b:00007fb92f11ff58 EFLAGS: 00000756 ORIG_RAX: d1d66dbfed01019b
RAX: 2bf9e1987c1988ee RBX: 6f67a894836fe1f3 RCX: ed0b474b2b46640f
RDX: fb381f0b5e12d2ce RSI: 401aaa756d8c34aa RDI: 30b9ec15aecde911
RBP: 532828f82bbb556c R08: dbce39d105fdbf88 R09: ae9ea378b9c9fbc7
R10: 33740f3b8630618c R11: 2450ade207355af5 R12: 0a61688f027fb1a4
R13: 339c71c774e61334 R14: 28baed4a0483d193 R15: 7c1f9cf2b758efdc
</TASK>
----------------
Code disassembly (best guess):
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff lcall (bad)
8: df 48 89 fisttps -0x77(%rax)
b: fa cli
c: 48 c1 ea 03 shr $0x3,%rdx
10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
14: 75 4f jne 0x65
16: 48 8d 3d f2 18 e4 0b lea 0xbe418f2(%rip),%rdi # 0xbe4190f
1d: 41 56 push %r14
1f: 48 8b 14 dd c0 33 1c mov -0x73e3cc40(,%rbx,8),%rdx
26: 8c
27: 4c 89 e6 mov %r12,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 58 pop %rax
30: 83 05 0c c5 d9 0b 01 addl $0x1,0xbd9c50c(%rip) # 0xbd9c543
37: 48 83 c4 18 add $0x18,%rsp
3b: 5b pop %rbx
3c: 5d pop %rbp
3d: 41 5c pop %r12
3f: 41 rex.B