Re: [syzbot] [net?] [afs?] kernel BUG in rxrpc_destroy_all_connections (2)
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From: syzbot <hidden>
Date: 2026-09-27 12:19:03
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Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in rxrpc_destroy_all_connections rxrpc: AF_RXRPC: proc conn 7f4 cid fba44d28 state 7 ref 1 act 0 flags 2 cache_empty 1 calls 0000000000000000 0000000000000000 0000000000000000 0000000000000000 bundle ffff88802d3d1000 rxrpc: Assertion failed ------------[ cut here ]------------ kernel BUG at net/rxrpc/conn_object.c:506! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 3 UID: 0 PID: 5762 Comm: kworker/u32:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:rxrpc_destroy_all_connections.cold+0x12/0x34f net/rxrpc/conn_object.c:506 Code: ff 90 0f 0b e8 6e a7 99 00 48 c7 c7 20 73 5d 8d e8 72 be af ff 90 0f 0b e8 5a a7 99 00 48 c7 c7 20 73 5d 8d e8 5e be af ff 90 <0f> 0b e8 46 a7 99 00 48 c7 c7 60 78 5d 8d e8 4a be af ff 4c 89 e7 RSP: 0018:ffffc9000443f928 EFLAGS: 00010286 RAX: 0000000000000017 RBX: ffff888054ab4000 RCX: 0000000000000000 RDX: 0000000000000017 RSI: ffffffff81ea2579 RDI: fffff52000887f16 RBP: ffff888054ab4064 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: ffff888054ab4098 R13: ffff888054ab3e70 R14: ffff888054ab4078 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880d5e52000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0fcd74e9c CR3: 0000000035950000 CR4: 0000000000352ef0 Call Trace: <TASK> rxrpc_exit_net+0x7b/0xc0 net/rxrpc/net_ns.c:113 ops_exit_list net/core/net_namespace.c:200 [inline] ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:253 cleanup_net+0x499/0x920 net/core/net_namespace.c:706 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 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+0x12/0x34f net/rxrpc/conn_object.c:506 Code: ff 90 0f 0b e8 6e a7 99 00 48 c7 c7 20 73 5d 8d e8 72 be af ff 90 0f 0b e8 5a a7 99 00 48 c7 c7 20 73 5d 8d e8 5e be af ff 90 <0f> 0b e8 46 a7 99 00 48 c7 c7 60 78 5d 8d e8 4a be af ff 4c 89 e7 RSP: 0018:ffffc9000443f928 EFLAGS: 00010286 RAX: 0000000000000017 RBX: ffff888054ab4000 RCX: 0000000000000000 RDX: 0000000000000017 RSI: ffffffff81ea2579 RDI: fffff52000887f16 RBP: ffff888054ab4064 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: ffff888054ab4098 R13: ffff888054ab3e70 R14: ffff888054ab4078 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880d5e52000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0fcd74e9c CR3: 0000000035950000 CR4: 0000000000352ef0 Tested on: commit: a7bfaba4 ipv6: fix prefix route expiry in modify_prefi.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git console output: https://syzkaller.appspot.com/x/log.txt?x=13e06605580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7d012d9c67977ee4 dashboard link: https://syzkaller.appspot.com/bug?extid=89001660f14fb7684c83 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=124d5315580000