------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: rose_transmit_restart_request net/rose/rose_link.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:284
WARNING: CPU: 0 PID: 11961 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 11961 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 11961 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 11961 Comm: syz.3.1812 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 88 b6 bd fd 4c 8b 45 00 48 c7 c7 80 16 df 8a 48 c7 c6 40 13 df 8a 48 c7 c2 e0 17 df 8a 8b 0c 24 4d 89 e9 e8 e4 1b 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 65 4a 0a
RSP: 0000:ffffc90000007a10 EFLAGS: 00010246
RAX: b8ec25e2c4e1eb00 RBX: ffffffff96eee0e0 RCX: ffff888024585940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8dedc0 R08: ffffc90000007687 R09: 1ffff92000000ed0
R10: dffffc0000000000 R11: fffff52000000ed1 R12: ffff888056bce200
R13: ffffffff892b51e0 R14: ffff888056bce000 R15: ffff888056bce090
FS: 00007fe9674c56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe95c44f000 CR3: 000000007bca2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_free_hook mm/slub.c:1704 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4a7/0x5d0 net/rose/rose_timer.c:183
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5124
Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 e9 e8 04 00 00 4c 8b 75 d0 4c 89 e7 e8 00 2c de 08 e8 8b 2c 2f 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0000:ffffc9000d547838 EFLAGS: 00000282
RAX: b8ec25e2c4e1eb00 RBX: 0000000000000000 RCX: b8ec25e2c4e1eb00
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: ffffffff8adf0d20
RBP: ffffc9000d547890 R08: ffffffff90af7277 R09: 1ffffffff215ee4e
R10: dffffc0000000000 R11: fffffbfff215ee4f R12: ffff888024585940
R13: dffffc0000000000 R14: ffffffff8c8bc740 R15: ffff8880b8e3b5d0
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x11d9/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x13/0x80 kernel/kcov.c:293
Code: 11 08 04 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 65 48 8b 0d c4 f8 7f 7e 65 8b 15 c5 f8 7f 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00
RSP: 0000:ffffc9000d547ba0 EFLAGS: 00000246
RAX: ffffffff8a1aa59e RBX: ffff88801f257c1c RCX: ffff888024585940
RDX: 0000000080000000 RSI: 00007fe95c44f000 RDI: 00007fe9647f7fff
RBP: 0000000000000002 R08: ffff888024585940 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000002 R12: dffffc0000000000
R13: 00007fe9647f7fff R14: 00007fe95c44f000 R15: ffff88801f257c00
mtree_range_walk+0x26e/0x7b0 lib/maple_tree.c:2969
mas_state_walk lib/maple_tree.c:3903 [inline]
mt_find+0x242/0x830 lib/maple_tree.c:6539
find_vma+0x12c/0x1b0 mm/mmap.c:1898
lock_mm_and_find_vma+0x71/0x2f0 mm/memory.c:5385
do_user_addr_fault+0x2db/0xb10 arch/x86/mm/fault.c:1310
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fe966453b8e
Code: c1 49 39 4f 08 72 54 8d 4d ff 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007fe9674c4470 EFLAGS: 00010206
RAX: 0000000000058001 RBX: 00007fe9674c4530 RCX: 000000000000009e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fe9674c45d0
RBP: 0000000000000102 R08: 00007fe95c3f7000 R09: 0000000000058000
R10: 0000000000000000 R11: 00007fe9674c4540 R12: 0000000000000001
R13: 00007fe966652600 R14: 0000000000000000 R15: 00007fe9674c45d0
----------------
Code disassembly (best guess):
0: 0f 84 3b 01 00 00 je 0x141
6: 48 85 db test %rbx,%rbx
9: 0f 85 5a 01 00 00 jne 0x169
f: e9 e8 04 00 00 jmp 0x4fc
14: 4c 8b 75 d0 mov -0x30(%rbp),%r14
18: 4c 89 e7 mov %r12,%rdi
1b: e8 00 2c de 08 call 0x8de2c20
20: e8 8b 2c 2f 00 call 0x2f2cb0
25: fb sti
26: 4c 8b 65 c0 mov -0x40(%rbp),%r12
* 2a: 49 8d bc 24 f8 15 00 lea 0x15f8(%r12),%rdi <-- trapping instruction
31: 00
32: 48 89 f8 mov %rdi,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
3e: 84 c0 test %al,%al