syzbot


general protection fault in ucma_set_ib_path

Status: closed as dup on 2018/03/19 14:14
Subsystems: rdma
[Documentation on labels]
Reported-by: syzbot+5e82f99b242e7f5e1d18@syzkaller.appspotmail.com
First crash: 2270d, last: 2270d
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_set_ib_path 1 (2) 2018/03/19 14:14
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in ucma_set_ib_path (2) rdma C 6 2236d 2244d 5/26 fixed on 2018/05/08 18:30

Sample crash report:
audit: type=1400 audit(1520532856.844:6): avc:  denied  { map } for  pid=4235 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
audit: type=1400 audit(1520532863.173:7): avc:  denied  { map } for  pid=4249 comm="syzkaller677323" path="/root/syzkaller677323420" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
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
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4249 Comm: syzkaller677323 Not tainted 4.16.0-rc4+ #346
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rdma_cap_opa_ah include/rdma/ib_verbs.h:2777 [inline]
RIP: 0010:ucma_set_ib_path.isra.14+0x26a/0x850 drivers/infiniband/core/ucma.c:1231
RSP: 0018:ffff8801d3fcf820 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000029
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000148
RBP: ffff8801d3fcfa20 R08: ffffed003a7f9f1e R09: ffffffff867a1b5c
R10: 0000000000000002 R11: ffffed003a7f9f1d R12: ffff8801d3fcf8d0
R13: 1ffff1003a7f9f06 R14: ffff8801b0e3d070 R15: ffff8801b09576c0
FS:  0000000001c43880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005581e954c110 CR3: 00000001b7de6005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ucma_set_option_ib drivers/infiniband/core/ucma.c:1254 [inline]
 ucma_set_option_level drivers/infiniband/core/ucma.c:1273 [inline]
 ucma_set_option+0x252/0x4d0 drivers/infiniband/core/ucma.c:1304
 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: 0033:0x43fea9
RSP: 002b:00007ffc0b06c988 EFLAGS: 00000217 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fea9
RDX: 000000000000034d RSI: 0000000020001340 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004017d0
R13: 0000000000401860 R14: 0000000000000000 R15: 0000000000000000
Code: 00 00 48 c1 ea 03 80 3c 02 00 0f 85 0d 05 00 00 49 8b 07 48 ba 00 00 00 00 00 fc ff df 48 8d b8 48 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 54 05 00 00 48 c1 e3 04 48 03 98 48 01 00 00 
RIP: rdma_cap_opa_ah include/rdma/ib_verbs.h:2777 [inline] RSP: ffff8801d3fcf820
RIP: ucma_set_ib_path.isra.14+0x26a/0x850 drivers/infiniband/core/ucma.c:1231 RSP: ffff8801d3fcf820
---[ end trace e658861a5e75e206 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/03/08 18:17 upstream 1b88accf6a65 acd0caa5 .config console log report syz C ci-upstream-kasan-gce
2018/03/08 18:07 upstream 1b88accf6a65 acd0caa5 .config console log report syz ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.