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ODEBUG: free active (active state 0) object: ffff88806022d890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 24877 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 24877 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 24877 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 24877 Comm: syz.6.4857 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Code: 4c 8b 4d 00 48 c7 c7 80 7b fc 8a 48 c7 c6 e0 77 fc 8a 48 c7 c2 00 7d fc 8a 8b 0c 24 4d 89 f8 41 55 e8 fe 0a 2a fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 53 c5 24
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: fb130ba378024800 RBX: ffffffff97101108 RCX: ffff888079415a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9ec0 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88806022da00
R13: ffffffff89671800 R14: ffff88806022d000 R15: ffff88806022d890
FS: 00007f0240ba26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0240b80f98 CR3: 000000002d010000 CR4: 00000000003506e0
Call Trace:
slab_free_hook mm/slub.c:1786 [inline]
slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4c6/0x5f0 net/rose/rose_timer.c:183
call_timer_fn+0x16e/0x530 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x52d/0x7d0 kernel/time/timer.c:2022
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__might_resched+0x7f/0x610 kernel/sched/core.c:10163
Code: 8c 48 c7 44 24 50 10 2a 5d 81 48 8d 5c 24 40 48 c1 eb 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 09 f2 f2 f2 00 <66> 42 c7 44 2b 0d f3 f3 42 c6 44 2b 0f f3 e8 ee 24 11 09 85 c0 74
RSP: 0018:ffffc90004157b60 EFLAGS: 00000a06
RAX: f2f2f200f1f1f1f1 RBX: 1ffff9200082af74 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000ba8 RDI: ffffffff8ba25740
RBP: ffffc90004157c70 R08: ffffffff8e4a91af R09: 1ffffffff1c95235
R10: dffffc0000000000 R11: fffffbfff1c95236 R12: 0000000000007561
R13: dffffc0000000000 R14: 00002000000000c0 R15: dffffc0000000000
do_recvmmsg+0x53b/0x7d0 net/socket.c:2984
__sys_recvmmsg net/socket.c:3029 [inline]
__do_sys_recvmmsg net/socket.c:3052 [inline]
__se_sys_recvmmsg net/socket.c:3045 [inline]
__x64_sys_recvmmsg+0x191/0x240 net/socket.c:3045
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f023fd8ec29
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:00007f0240ba2038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f023ffd6090 RCX: 00007f023fd8ec29
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000007
RBP: 00007f023fe11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f023ffd6128 R14: 00007f023ffd6090 R15: 00007ffc3f1105b8
----------------
Code disassembly (best guess):
0: 8c 48 c7 mov %cs,-0x39(%rax)
3: 44 24 50 rex.R and $0x50,%al
6: 10 2a adc %ch,(%rdx)
8: 5d pop %rbp
9: 81 48 8d 5c 24 40 48 orl $0x4840245c,-0x73(%rax)
10: c1 eb 03 shr $0x3,%ebx
13: 48 b8 f1 f1 f1 f1 00 movabs $0xf2f2f200f1f1f1f1,%rax
1a: f2 f2 f2
1d: 4a 89 04 2b mov %rax,(%rbx,%r13,1)
21: 42 c7 44 2b 09 f2 f2 movl $0xf2f2f2,0x9(%rbx,%r13,1)
28: f2 00
* 2a: 66 42 c7 44 2b 0d f3 movw $0xf3f3,0xd(%rbx,%r13,1) <-- trapping instruction
31: f3
32: 42 c6 44 2b 0f f3 movb $0xf3,0xf(%rbx,%r13,1)
38: e8 ee 24 11 09 call 0x911252b
3d: 85 c0 test %eax,%eax
3f: 74 .byte 0x74