syzbot

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ODEBUG: free active (active state 0) object: ffff88801a24b890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 0 PID: 8571 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 8571 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 0 PID: 8571 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 0 PID: 8571 Comm: syz.1.744 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 40 79 fc 8a 48 c7 c6 a0 75 fc 8a 48 c7 c2 c0 7a fc 8a 8b 0c 24 4d 89 f8 41 55 e8 3e b9 29 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 43 02 24
RSP: 0018:ffffc90000007a50 EFLAGS: 00010296
RAX: ad897f3269204700 RBX: ffffffff9711d620 RCX: ffff88802d58bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9f00 R08: ffffc90000007647 R09: 1ffff92000000ec8
R10: dffffc0000000000 R11: fffff52000000ec9 R12: ffff88801a24ba00
R13: ffffffff89603730 R14: ffff88801a24b000 R15: ffff88801a24b890
FS:  00007f03fb3606c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75a5f98000 CR3: 00000000212f9000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 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:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:kasan_check_range+0x1be/0x290 mm/kasan/generic.c:-1
Code: 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 49 ff cc 75 ee 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 45 84 ff 75 61 41 f7 c7 00 ff 00 00
RSP: 0018:ffffc900048ff6d0 EFLAGS: 00000256
RAX: ffff888025b49001 RBX: ffff888025b49060 RCX: ffffffff891cbdbc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888025b49060
RBP: ffffc900048ff898 R08: ffff888025b49067 R09: 1ffff11004b6920c
R10: dffffc0000000000 R11: ffffed1004b6920d R12: 0000000000000001
R13: 1ffff9200091fef0 R14: ffffed1004b6920d R15: 1ffff11004b6920c
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 sock_flag include/net/sock.h:1000 [inline]
 __unix_dgram_recvmsg+0x69c/0xd60 net/unix/af_unix.c:2453
 sock_recvmsg_nosec+0x82/0xd0 net/socket.c:1046
 ____sys_recvmsg+0x49b/0x5b0 net/socket.c:2812
 ___sys_recvmsg+0x1b6/0x510 net/socket.c:2856
 do_recvmmsg+0x360/0x7d0 net/socket.c:2950
 __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: 0033:0x7f03fa58f749
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:00007f03fb360038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f03fa7e6090 RCX: 00007f03fa58f749
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f03fa613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f03fa7e6128 R14: 00007f03fa7e6090 R15: 00007ffdd0aff6b8
 </TASK>
----------------
Code disassembly (best guess):
   0:	01 f3                	add    %esi,%ebx
   2:	49 8d 5c 24 07       	lea    0x7(%r12),%rbx
   7:	4d 85 e4             	test   %r12,%r12
   a:	49 0f 49 dc          	cmovns %r12,%rbx
   e:	48 83 e3 f8          	and    $0xfffffffffffffff8,%rbx
  12:	49 29 dc             	sub    %rbx,%r12
  15:	74 12                	je     0x29
  17:	41 80 3b 00          	cmpb   $0x0,(%r11)
  1b:	0f 85 a6 00 00 00    	jne    0xc7
  21:	49 ff c3             	inc    %r11
  24:	49 ff cc             	dec    %r12
  27:	75 ee                	jne    0x17
  29:	5b                   	pop    %rbx
* 2a:	41 5c                	pop    %r12 <-- trapping instruction
  2c:	41 5d                	pop    %r13
  2e:	41 5e                	pop    %r14
  30:	41 5f                	pop    %r15
  32:	5d                   	pop    %rbp
  33:	c3                   	ret
  34:	45 84 ff             	test   %r15b,%r15b
  37:	75 61                	jne    0x9a
  39:	41 f7 c7 00 ff 00 00 	test   $0xff00,%r15d