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Date: Thu, 27 Jun 2019 19:47:06 -0700 From: syzbot <syzbot+1e0edc4b8b7494c28450@...kaller.appspotmail.com> To: davem@...emloft.net, dhowells@...hat.com, linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: kernel BUG at net/rxrpc/local_object.c:LINE! Hello, syzbot found the following crash on: HEAD commit: 249155c2 Merge branch 'parisc-5.2-4' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14fabe45a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e7c31a94f66cc0aa dashboard link: https://syzkaller.appspot.com/bug?extid=1e0edc4b8b7494c28450 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13e2738da00000 The bug was bisected to: commit 46894a13599a977ac35411b536fb3e0b2feefa95 Author: David Howells <dhowells@...hat.com> Date: Thu Oct 4 08:32:28 2018 +0000 rxrpc: Use IPv4 addresses throught the IPv6 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=152fabe3a00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=172fabe3a00000 console output: https://syzkaller.appspot.com/x/log.txt?x=132fabe3a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1e0edc4b8b7494c28450@...kaller.appspotmail.com Fixes: 46894a13599a ("rxrpc: Use IPv4 addresses throught the IPv6") rxrpc: Assertion failed ------------[ cut here ]------------ kernel BUG at net/rxrpc/local_object.c:468! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.2.0-rc6+ #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rxrpc_local_rcu net/rxrpc/local_object.c:468 [inline] RIP: 0010:rxrpc_local_rcu.cold+0x11/0x13 net/rxrpc/local_object.c:462 Code: 83 eb 20 e9 74 ff ff ff e8 58 aa 2d fb eb cc 4c 89 ef e8 6e aa 2d fb eb e2 e8 d7 fd f4 fa 48 c7 c7 20 8c 15 88 e8 6f 03 df fa <0f> 0b e8 c4 fd f4 fa 48 c7 c7 20 8c 15 88 e8 5c 03 df fa 0f 0b e8 RSP: 0018:ffff8880a9917c98 EFLAGS: 00010286 RAX: 0000000000000017 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815ad926 RDI: ffffed1015322f85 RBP: ffff8880a9917ca8 R08: 0000000000000017 R09: ffffed1015d260a1 R10: ffffed1015d260a0 R11: ffff8880ae930507 R12: ffff888099033b40 R13: ffff888099033b40 R14: ffffffff867b8f10 R15: ffff8880a9917d28 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f380ebda000 CR3: 000000007ad50000 CR4: 00000000001406e0 Call Trace: __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2092 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2310 [inline] rcu_core+0xba5/0x1500 kernel/rcu/tree.c:2291 __do_softirq+0x25c/0x94c kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:603 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595 smpboot_thread_fn+0x6a3/0xa30 kernel/smpboot.c:165 kthread+0x354/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace 0e784d6285151217 ]--- RIP: 0010:rxrpc_local_rcu net/rxrpc/local_object.c:468 [inline] RIP: 0010:rxrpc_local_rcu.cold+0x11/0x13 net/rxrpc/local_object.c:462 Code: 83 eb 20 e9 74 ff ff ff e8 58 aa 2d fb eb cc 4c 89 ef e8 6e aa 2d fb eb e2 e8 d7 fd f4 fa 48 c7 c7 20 8c 15 88 e8 6f 03 df fa <0f> 0b e8 c4 fd f4 fa 48 c7 c7 20 8c 15 88 e8 5c 03 df fa 0f 0b e8 RSP: 0018:ffff8880a9917c98 EFLAGS: 00010286 RAX: 0000000000000017 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815ad926 RDI: ffffed1015322f85 RBP: ffff8880a9917ca8 R08: 0000000000000017 R09: ffffed1015d260a1 R10: ffffed1015d260a0 R11: ffff8880ae930507 R12: ffff888099033b40 R13: ffff888099033b40 R14: ffffffff867b8f10 R15: ffff8880a9917d28 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f380ebda000 CR3: 000000007ad50000 CR4: 00000000001406e0 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
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