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ODEBUG: free active (active state 0) object: ffff88802ee79890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 25140 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 25140 Comm: syz.3.5854 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 97 e8 52 fd 4d 8b 0f 48 c7 c7 20 40 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 1e b3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 8a d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a10 EFLAGS: 00010292
RAX: 83bd3c1fd6176f00 RBX: dffffc0000000000 RCX: ffff8880338c5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffffff8a6c9760
R13: ffffffff8be341a0 R14: ffff88802ee79890 R15: ffffffff8b8cdfa0
FS: 00007f822948b6c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc27b48d08 CR3: 00000000212e4000 CR4: 00000000003526f0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2348 [inline]
slab_free mm/slub.c:4680 [inline]
kfree+0x112/0x440 mm/slub.c:4879
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset_orig+0x6a/0xb0 arch/x86/lib/memset_64.S:87
Code: 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1 e9 03 <66> 0f 1f 44 00 00 ff c9 48 89 07 48 8d 7f 08 75 f5 83 e2 07 74 0a
RSP: 0018:ffffc9000c587250 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc9000c587360 RCX: 0000000000000002
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc9000c587378
RBP: dffffc0000000000 R08: ffffc9000c587387 R09: 0000000000000000
R10: ffffc9000c587378 R11: fffff520018b0e71 R12: ffffc9000c587a30
R13: ffffc9000c587378 R14: ffffc9000c587328 R15: ffffc9000c587370
unwind_next_frame+0xc98/0x2390 arch/x86/kernel/unwind_orc.c:592
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:243 [inline]
__kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2417 [inline]
slab_free mm/slub.c:4680 [inline]
kmem_cache_free+0x18f/0x400 mm/slub.c:4782
netlink_broadcast_filtered+0x1188/0x12c0 net/netlink/af_netlink.c:1537
nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
nlmsg_multicast include/net/netlink.h:1184 [inline]
nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2595
inet6_ifmcaddr_notify+0x134/0x1d0 net/ipv6/mcast.c:928
__ipv6_dev_mc_inc+0x8a9/0xa50 net/ipv6/mcast.c:978
ipv6_add_dev+0xe54/0x1370 net/ipv6/addrconf.c:472
addrconf_notify+0x794/0x1010 net/ipv6/addrconf.c:3650
notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
register_netdevice+0x1608/0x1ae0 net/core/dev.c:11244
ppp_unit_register drivers/net/ppp/ppp_generic.c:1219 [inline]
ppp_dev_configure+0x8a4/0xb10 drivers/net/ppp/ppp_generic.c:1280
ppp_create_interface drivers/net/ppp/ppp_generic.c:3367 [inline]
ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1065 [inline]
ppp_ioctl+0x6a5/0x19a0 drivers/net/ppp/ppp_generic.c:738
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:598 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f822858ebe9
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:00007f822948b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f82287b5fa0 RCX: 00007f822858ebe9
RDX: 0000200000000040 RSI: 00000000c004743e RDI: 0000000000000006
RBP: 00007f8228611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f82287b6038 R14: 00007f82287b5fa0 R15: 00007ffdb05ea0a8
----------------
Code disassembly (best guess):
0: 47 18 48 89 rex.RXB sbb %r9b,-0x77(%r8)
4: 47 20 48 89 rex.RXB and %r9b,-0x77(%r8)
8: 47 28 48 89 rex.RXB sub %r9b,-0x77(%r8)
c: 47 30 48 89 rex.RXB xor %r9b,-0x77(%r8)
10: 47 38 48 8d rex.RXB cmp %r9b,-0x73(%r8)
14: 7f 40 jg 0x56
16: 75 d8 jne 0xfffffff0
18: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
1f: 00
20: 89 d1 mov %edx,%ecx
22: 83 e1 38 and $0x38,%ecx
25: 74 14 je 0x3b
27: c1 e9 03 shr $0x3,%ecx
* 2a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) <-- trapping instruction
30: ff c9 dec %ecx
32: 48 89 07 mov %rax,(%rdi)
35: 48 8d 7f 08 lea 0x8(%rdi),%rdi
39: 75 f5 jne 0x30
3b: 83 e2 07 and $0x7,%edx
3e: 74 0a je 0x4a