syzbot


general protection fault in ucma_accept

Status: closed as dup on 2018/03/19 10:17
Subsystems: rdma
[Documentation on labels]
Reported-by: syzbot+7bed8439de3bce19a53e@syzkaller.appspotmail.com
First crash: 2270d, last: 2261d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
general protection fault in ucma_connect rdma C 2 2262d 2261d
Discussions (1)
Title Replies (including bot) Last reply
general protection fault in ucma_accept 1 (2) 2018/03/19 10:17

Sample crash report:
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 4256 Comm: syzkaller154615 Not tainted 4.16.0-rc4+ #346
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ucma_copy_conn_param drivers/infiniband/core/ucma.c:1021 [inline]
RIP: 0010:ucma_accept+0x4eb/0x970 drivers/infiniband/core/ucma.c:1085
RSP: 0018:ffff8801b9a4f8c8 EFLAGS: 00010202
RAX: ffff8801af1ec400 RBX: ffff8801b9a4f948 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000020
RBP: ffff8801b9a4fad0 R08: 0000000000000000 R09: 1ffff10037349f23
R10: ffffffff88613380 R11: 0000000000000000 R12: ffff8801b9a4f908
R13: ffff8801b9a4faa8 R14: ffff8801aeba3a00 R15: ffff8801afa34c00
FS:  00007f8d6f239700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d6f238e78 CR3: 00000001b0505006 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1627
 __vfs_write+0xef/0x970 fs/read_write.c:480
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x445ae9
RSP: 002b:00007f8d6f238da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445ae9
RDX: 0000000000000128 RSI: 0000000020000780 RDI: 0000000000000003
RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 006d635f616d6472
R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000004
Code: 0c 09 84 c9 74 09 80 f9 03 0f 8e 4a 02 00 00 49 8d 78 20 41 89 b5 70 fe ff ff 48 b9 00 00 00 00 00 fc ff df 48 89 fe 48 c1 ee 03 <0f> b6 34 0e 48 89 f9 83 e1 07 83 c1 01 40 38 f1 7c 09 40 84 f6 
RIP: ucma_copy_conn_param drivers/infiniband/core/ucma.c:1021 [inline] RSP: ffff8801b9a4f8c8
RIP: ucma_accept+0x4eb/0x970 drivers/infiniband/core/ucma.c:1085 RSP: ffff8801b9a4f8c8
---[ end trace efb43dccceaff67b ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/03/08 17:42 upstream 1b88accf6a65 acd0caa5 .config console log report syz C ci-upstream-kasan-gce
2018/03/08 17:31 upstream 1b88accf6a65 acd0caa5 .config console log report syz ci-upstream-kasan-gce-386
2018/03/17 02:14 upstream 8f5fd927c3a7 08dacaa0 .config console log report ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.