bisecting fixing commit since aea8526edf59da3ff5306ca408e13d8f6ab89b34
building syzkaller on 1656845f45f284c574eb4f8bfe85dd7916a47a3a
testing commit aea8526edf59da3ff5306ca408e13d8f6ab89b34 with gcc (GCC) 8.1.0
kernel signature: ae885d1cebbfbd79c388e4eed16f327284ce4024
all runs: crashed: general protection fault in rxrpc_connect_call
testing current HEAD fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f
testing commit fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f with gcc (GCC) 8.1.0
kernel signature: 2176fb67d18b75ebb123a1fea2f8f7521d21fab8
run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in rxrpc_send_data_packet
run #1: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #2: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #3: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #4: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #5: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #6: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #7: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #8: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
run #9: crashed: kernel BUG at net/rxrpc/local_object.c:LINE!
revisions tested: 2, total time: 30m1.433878786s (build: 15m33.8122096s, test: 13m17.997812565s)
the crash still happens on HEAD
commit msg: Linux 4.14.157
crash: kernel BUG at net/rxrpc/local_object.c:LINE!
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
rxrpc: AF_RXRPC: Leaked local ffff888099f1f680 {1}
------------[ cut here ]------------
kernel BUG at net/rxrpc/local_object.c:405!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 364 Comm: kworker/u4:3 Not tainted 4.14.157-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff8880a9052180 task.stack: ffff8880a9058000
RIP: 0010:rxrpc_destroy_all_locals+0xd6/0xe2 net/rxrpc/local_object.c:405
RSP: 0018:ffff8880a905fb98 EFLAGS: 00010296
RAX: dffffc0000000000 RBX: ffff8880a08b0820 RCX: dffffc0000000000
RDX: 1ffffffff0f22d29 RSI: 0000000000000000 RDI: 0000000000000286
RBP: ffff8880a905fbc0 R08: ffffffff894286a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a08b0800
R13: ffff8880a08b0820 R14: ffff8880a08b0830 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000017ff038 CR3: 0000000092778000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxrpc_exit_net+0x130/0x220 net/rxrpc/net_ns.c:78
 ops_exit_list.isra.7+0x8b/0x120 net/core/net_namespace.c:142
 cleanup_net+0x39d/0x800 net/core/net_namespace.c:484
 process_one_work+0x79e/0x16c0 kernel/workqueue.c:2114
 worker_thread+0xcc/0xee0 kernel/workqueue.c:2248
 kthread+0x338/0x400 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 8b a4 24 a0 02 00 00 49 bf 00 00 00 00 00 fc ff df 49 83 ec 20 4d 8d 6c 24 20 4c 39 eb 0f 85 3e 00 00 00 4c 89 f7 e8 3a e6 84 00 <0f> 0b 48 89 df e8 c0 94 e8 fb eb c8 48 c7 c7 a0 f7 1b 87 e8 1f 
RIP: rxrpc_destroy_all_locals+0xd6/0xe2 net/rxrpc/local_object.c:405 RSP: ffff8880a905fb98
---[ end trace 654534639c09fcd0 ]---