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ODEBUG: free active (active state 0) object: ffff888025d28cb8 object type: timer_list hint: cec_wait_timeout+0x0/0x180 include/media/cec.h:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.0.3204/21212
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1154 [inline], CPU#1: syz.0.3204/21212
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x358/0x530 lib/debugobjects.c:1184, CPU#1: syz.0.3204/21212
Modules linked in:
CPU: 1 UID: 0 PID: 21212 Comm: syz.0.3204 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1154 [inline]
RIP: 0010:debug_check_no_obj_freed+0x39c/0x530 lib/debugobjects.c:1184
Code: 48 89 04 24 e8 a5 b8 75 fd 48 8b 04 24 4c 8b 4d 00 4c 89 ef 48 c7 c6 e0 9f 28 8c 48 c7 c2 60 a5 28 8c 8b 4c 24 1c 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 10 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90005ac78a0 EFLAGS: 00010246
RAX: ffffffff87e83c30 RBX: ffffffff9a6fa8b8 RCX: 0000000000000000
RDX: ffffffff8c28a560 RSI: ffffffff8c289fe0 RDI: ffffffff903a7340
RBP: ffffffff8bcf39c0 R08: ffff888025d28cb8 R09: ffffffff8bcf4d20
R10: dffffc0000000000 R11: ffffffff81b1a1f0 R12: 0000000000000001
R13: ffffffff903a7340 R14: ffff888025d28000 R15: ffff888025d28cb8
FS: 00007f6b13bf26c0(0000) GS:ffff8881253b9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa101deb078 CR3: 000000008a112000 CR4: 0000000000350ef0
Call Trace:
<TASK>
slab_free_hook mm/slub.c:2620 [inline]
slab_free mm/slub.c:6251 [inline]
kfree+0x13e/0x640 mm/slub.c:6566
cec_transmit_msg_fh+0x16f0/0x24d0 drivers/media/cec/core/cec-adap.c:988
cec_transmit drivers/media/cec/core/cec-api.c:230 [inline]
cec_ioctl+0x2020/0x3060 drivers/media/cec/core/cec-api.c:534
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b1619ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6b13bf2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b16416360 RCX: 00007f6b1619ce59
RDX: 00002000000000c0 RSI: 00000000c0386105 RDI: 0000000000000006
RBP: 00007f6b16232d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b164163f8 R14: 00007f6b16416360 R15: 00007ffdafcf65c8
</TASK>
----------------
Code disassembly (best guess):
0: 48 89 04 24 mov %rax,(%rsp)
4: e8 a5 b8 75 fd call 0xfd75b8ae
9: 48 8b 04 24 mov (%rsp),%rax
d: 4c 8b 4d 00 mov 0x0(%rbp),%r9
11: 4c 89 ef mov %r13,%rdi
14: 48 c7 c6 e0 9f 28 8c mov $0xffffffff8c289fe0,%rsi
1b: 48 c7 c2 60 a5 28 8c mov $0xffffffff8c28a560,%rdx
22: 8b 4c 24 1c mov 0x1c(%rsp),%ecx
26: 4d 89 f8 mov %r15,%r8
29: 50 push %rax
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 6c 24 10 mov 0x10(%rsp),%r13
38: 48 rex.W
39: b9 00 00 00 00 mov $0x0,%ecx
3e: 00 fc add %bh,%ah