------------[ 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: 18578 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 18578 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 18578 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 18578 Comm: syz.7.3610 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 48 cc bd fd 4c 8b 45 00 48 c7 c7 c0 18 df 8a 48 c7 c6 80 15 df 8a 48 c7 c2 20 1a df 8a 8b 0c 24 4d 89 e9 e8 34 52 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 a5 7a 0a
RSP: 0018:ffffc90000007a10 EFLAGS: 00010246
RAX: 9dd84b20612d6500 RBX: ffffffff96e5f060 RCX: ffff88802dbe0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8def40 R08: ffffc90000007687 R09: 1ffff92000000ed0
R10: dffffc0000000000 R11: fffff52000000ed1 R12: ffff888056580a00
R13: ffffffff892aadc0 R14: ffff888056580000 R15: ffff888056580890
FS: 00007feb3f0a06c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001e8030 CR3: 00000000727d1000 CR4: 00000000003526f0
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:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:125 [inline]
RIP: 0010:rcu_read_lock_sched_held+0xfe/0x110 kernel/rcu/update.c:125
Code: 00 00 fc ff df 41 c6 04 06 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 31 db f7 44 24 20 00 02 00 00 41 c6 04 06 f8 0f 94 c3 8f e8 3b a4 c1 08 66 2e 0f 1f 84 00 00 00 00 00 90 53 48 bb 00
RSP: 0018:ffffc9000d9d76e0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000000 RCX: 9dd84b20612d6500
RDX: 0000000000000000 RSI: ffffffff8a8c23a0 RDI: ffffffff8adf0f60
RBP: ffffc9000d9d7758 R08: dffffc0000000000 R09: 1ffffffff215ec48
R10: dffffc0000000000 R11: fffffbfff215ec49 R12: ffffea0001079248
R13: dffffc0000000000 R14: 1ffff92001b3aedc R15: dffffc0000000000
task_css include/linux/cgroup.h:509 [inline]
mem_cgroup_from_task+0x49/0x110 mm/memcontrol.c:985
get_mem_cgroup_from_mm+0xd2/0x290 mm/memcontrol.c:1038
__mem_cgroup_charge+0x11/0x80 mm/memcontrol.c:6943
mem_cgroup_charge include/linux/memcontrol.h:672 [inline]
shmem_add_to_page_cache+0x90d/0x1c50 mm/shmem.c:708
shmem_get_folio_gfp+0x158e/0x3400 mm/shmem.c:1971
shmem_get_folio mm/shmem.c:2072 [inline]
shmem_write_begin+0xee/0x3f0 mm/shmem.c:2556
generic_perform_write+0x2fa/0x5c0 mm/filemap.c:3862
__generic_file_write_iter+0x148/0x2a0 mm/filemap.c:3960
generic_file_write_iter+0xab/0x2e0 mm/filemap.c:3989
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x4b1/0xa30 fs/read_write.c:584
ksys_write+0x14c/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7feb3e15cfce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007feb3f09fda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007feb3f0a06c0 RCX: 00007feb3e15cfce
RDX: 00000000013bd7ef RSI: 00007feb33ff7000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007feb3f09fee0 R14: 00007feb3f09fea0 R15: 00007feb33ff7000
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: fc cld
3: ff lcall (bad)
4: df 41 c6 filds -0x3a(%rcx)
7: 04 06 add $0x6,%al
9: 00 48 c7 add %cl,-0x39(%rax)
c: 44 24 20 rex.R and $0x20,%al
f: 00 00 add %al,(%rax)
11: 00 00 add %al,(%rax)
13: 9c pushf
14: 8f 44 24 20 pop 0x20(%rsp)
18: 31 db xor %ebx,%ebx
1a: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp)
21: 00
22: 41 c6 04 06 f8 movb $0xf8,(%r14,%rax,1)
27: 0f 94 c3 sete %bl
* 2a: eb 8f jmp 0xffffffbb <-- trapping instruction
2c: e8 3b a4 c1 08 call 0x8c1a46c
31: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
38: 00 00 00
3b: 90 nop
3c: 53 push %rbx
3d: 48 rex.W
3e: bb .byte 0xbb