#syz fix: net/smc: propagate file from SMC to TCP socket On 11/07/2018 21:57, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 0026129c8629 rhashtable: add restart routine in rhashtable.. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=10ed430c400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b88de6eac8694da6 > dashboard link: https://syzkaller.appspot.com/bug?extid=2e9616288940d15a6476 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+2e9616288940d15a6...@syzkaller.appspotmail.com > > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > CPU: 1 PID: 27 Comm: kworker/1:1 Not tainted 4.18.0-rc3+ #5 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: events smc_tcp_listen_work > RIP: 0010:inet_accept+0xf2/0x9f0 net/ipv4/af_inet.c:734 > Code: 84 d2 74 09 80 fa 03 0f 8e 93 07 00 00 48 8d 78 28 41 c7 46 80 ea ff ff > ff 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 94 > 07 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b > RSP: 0018:ffff8801d94574b0 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000005 > RDX: dffffc0000000000 RSI: ffffffff86751b46 RDI: 0000000000000028 > RBP: ffff8801d9457598 R08: ffff8801d9448700 R09: ffffed00367a0f6f > R10: ffffed00367a0f6f R11: ffff8801b3d07b7b R12: ffff8801b3d07ac0 > R13: ffff8801d94574f0 R14: ffff8801d9457570 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000001b30220000 CR3: 00000001d711f000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > kernel_accept+0x136/0x310 net/socket.c:3251 > smc_clcsock_accept net/smc/af_smc.c:701 [inline] > smc_tcp_listen_work+0x222/0xef0 net/smc/af_smc.c:1114 > process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 > worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 > kthread+0x345/0x410 kernel/kthread.c:240 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 > Modules linked in: > Dumping ftrace buffer: > (ftrace buffer empty) > ---[ end trace 0d34e5471cc130cb ]--- > RIP: 0010:inet_accept+0xf2/0x9f0 net/ipv4/af_inet.c:734 > Code: 84 d2 74 09 80 fa 03 0f 8e 93 07 00 00 48 8d 78 28 41 c7 46 80 ea ff ff > ff 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 94 > 07 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b > RSP: 0018:ffff8801d94574b0 EFLAGS: 00010206 > RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000005 > RDX: dffffc0000000000 RSI: ffffffff86751b46 RDI: 0000000000000028 > RBP: ffff8801d9457598 R08: ffff8801d9448700 R09: ffffed00367a0f6f > R10: ffffed00367a0f6f R11: ffff8801b3d07b7b R12: ffff8801b3d07ac0 > R13: ffff8801d94574f0 R14: ffff8801d9457570 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000001b30220000 CR3: 0000000008e6a000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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 syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. > > >
-- Karsten (I'm a dude)
