kernel BUG in rxrpc_destroy_all_connections (2)

Status: upstream: reported on 2026/08/06 00:12
Subsystems: afs net
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+89001660f14fb7684c83@syzkaller.appspotmail.com
First crash: 6d03h, last: 33m
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
613bef23 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ kernel BUG in rxrpc_destroy_all_connections (2) 2026/08/03 00:00 2026/08/03 00:00 2026/08/03 00:53 e611ffe1
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [afs?] [net?] kernel BUG in rxrpc_destroy_all_connections (2) 0 (1) 2026/08/06 00:12
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at net/rxrpc/conn_object.c:LINE! (2) afs net -1 7 2007d 2069d 0/29 auto-closed as invalid on 2021/05/17 08:51
upstream kernel BUG in rxrpc_destroy_all_connections net afs -1 4 1786d 1838d 0/29 auto-closed as invalid on 2022/01/14 17:56

Sample crash report:
tipc: Left network mode
rxrpc: Assertion failed
------------[ cut here ]------------
kernel BUG at net/rxrpc/conn_object.c:488!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 1040 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: netns cleanup_net
RIP: 0010:rxrpc_destroy_all_connections.cold+0x12/0x14 net/rxrpc/conn_object.c:488
Code: ff 90 0f 0b e8 ca 82 98 00 48 c7 c7 80 12 3a 8d e8 9e 79 b0 ff 90 0f 0b e8 b6 82 98 00 48 c7 c7 80 12 3a 8d e8 8a 79 b0 ff 90 <0f> 0b e8 a2 82 98 00 49 63 d6 48 83 ce ff 48 c7 c7 20 7c de 90 e8
RSP: 0018:ffffc9000519f990 EFLAGS: 00010282
RAX: 0000000000000017 RBX: ffff888029c40000 RCX: 0000000000000000
RDX: 0000000000000017 RSI: ffffffff81e89fd9 RDI: fffff52000a33f23
RBP: ffff888029c40064 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: 1ffff92000a33f34
R13: ffff888029c40078 R14: ffff888029c40088 R15: ffff888029c40088
FS:  0000000000000000(0000) GS:ffff888123dd9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c701e4b45 CR3: 0000000057648000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 rxrpc_exit_net+0x7b/0xc0 net/rxrpc/net_ns.c:113
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252
 cleanup_net+0x499/0x920 net/core/net_namespace.c:702
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rxrpc_destroy_all_connections.cold+0x12/0x14 net/rxrpc/conn_object.c:488
Code: ff 90 0f 0b e8 ca 82 98 00 48 c7 c7 80 12 3a 8d e8 9e 79 b0 ff 90 0f 0b e8 b6 82 98 00 48 c7 c7 80 12 3a 8d e8 8a 79 b0 ff 90 <0f> 0b e8 a2 82 98 00 49 63 d6 48 83 ce ff 48 c7 c7 20 7c de 90 e8
RSP: 0018:ffffc9000519f990 EFLAGS: 00010282
RAX: 0000000000000017 RBX: ffff888029c40000 RCX: 0000000000000000
RDX: 0000000000000017 RSI: ffffffff81e89fd9 RDI: fffff52000a33f23
RBP: ffff888029c40064 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: 1ffff92000a33f34
R13: ffff888029c40078 R14: ffff888029c40088 R15: ffff888029c40088
FS:  0000000000000000(0000) GS:ffff888123dd9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558cf9997138 CR3: 000000000e994000 CR4: 0000000000350ef0

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/05 04:42 upstream c21bb4193868 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root kernel BUG in rxrpc_destroy_all_connections
2026/08/01 17:43 upstream 0131b508c0e2 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce kernel BUG in rxrpc_destroy_all_connections
2026/08/07 20:28 linux-next cc2b5f627e8c e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce kernel BUG in rxrpc_destroy_all_connections
2026/08/06 02:22 linux-next cc2b5f627e8c cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce kernel BUG in rxrpc_destroy_all_connections
2026/08/02 13:52 linux-next cc2b5f627e8c e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce kernel BUG in rxrpc_destroy_all_connections
* Struck through repros no longer work on HEAD.