kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 694 Comm: kworker/u4:4 Not tainted 5.4.254-syzkaller-00006-g9e316e5d734e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: netns cleanup_net
RIP: 0010:tipc_conn_close+0x4a/0x140 net/tipc/topsrv.c:158
Code: 24 08 49 89 de 49 c1 ee 03 41 80 3c 2e 00 74 08 48 89 df e8 a8 f7 52 fd 48 89 1c 24 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 88 f7 52 fd 48 8b 1b 4c 8d bb 38 02
RSP: 0018:ffff8881e0507bf0 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff8881e1958000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881de508e00
RBP: dffffc0000000000 R08: ffffffff823142b1 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881de508e00
R13: ffff8881f5ccc118 R14: 1ffff1103bca11c1 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd4c5debe8 CR3: 00000001e5a6a000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tipc_topsrv_stop net/tipc/topsrv.c:703 [inline]
tipc_topsrv_exit_net+0x141/0x320 net/tipc/topsrv.c:725
ops_exit_list net/core/net_namespace.c:179 [inline]
cleanup_net+0x665/0xc90 net/core/net_namespace.c:609
process_one_work+0x765/0xd20 kernel/workqueue.c:2290
worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
kthread+0x2da/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Modules linked in:
---[ end trace 0e2f8ded27bc4e3d ]---
RIP: 0010:tipc_conn_close+0x4a/0x140 net/tipc/topsrv.c:158
Code: 24 08 49 89 de 49 c1 ee 03 41 80 3c 2e 00 74 08 48 89 df e8 a8 f7 52 fd 48 89 1c 24 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 88 f7 52 fd 48 8b 1b 4c 8d bb 38 02
RSP: 0018:ffff8881e0507bf0 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff8881e1958000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881de508e00
RBP: dffffc0000000000 R08: ffffffff823142b1 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881de508e00
R13: ffff8881f5ccc118 R14: 1ffff1103bca11c1 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faf936ffd58 CR3: 00000001bd532000 CR4: 00000000003426b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 24 08 and $0x8,%al
2: 49 89 de mov %rbx,%r14
5: 49 c1 ee 03 shr $0x3,%r14
9: 41 80 3c 2e 00 cmpb $0x0,(%r14,%rbp,1)
e: 74 08 je 0x18
10: 48 89 df mov %rbx,%rdi
13: e8 a8 f7 52 fd call 0xfd52f7c0
18: 48 89 1c 24 mov %rbx,(%rsp)
1c: 48 8b 1b mov (%rbx),%rbx
1f: 48 83 c3 18 add $0x18,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 48 89 df mov %rbx,%rdi
33: e8 88 f7 52 fd call 0xfd52f7c0
38: 48 8b 1b mov (%rbx),%rbx
3b: 4c rex.WR
3c: 8d .byte 0x8d
3d: bb .byte 0xbb
3e: 38 02 cmp %al,(%rdx)