syzbot


general protection fault in relay_open_buf

Status: fixed on 2019/03/06 07:43
Subsystems: block trace
[Documentation on labels]
Reported-by: syzbot+16c3a70e1e9b29346c43@syzkaller.appspotmail.com
Fix commit: 2c1cf00eeacb relay: check return of create_buf_file() properly
First crash: 1941d, last: 1939d
Discussions (7)
Title Replies (including bot) Last reply
[PATCH 4.20 000/171] 4.20.16-stable review 178 (178) 2019/04/08 20:22
[PATCH 4.19 000/149] 4.19.29-stable review 153 (153) 2019/03/13 20:35
[PATCH 4.14 000/135] 4.14.106-stable review 140 (140) 2019/03/13 20:35
[PATCH AUTOSEL 4.20 01/81] ARM: OMAP: dts: N950/N9: fix onenand timings 89 (89) 2019/03/11 17:23
[PATCH AUTOSEL 4.19 01/64] ARM: OMAP: dts: N950/N9: fix onenand timings 68 (68) 2019/03/11 17:21
[PATCH AUTOSEL 4.14 01/36] ARM: dts: omap4-droid4: Fix typo in cpcap IRQ flags 36 (36) 2019/02/28 15:13
general protection fault in relay_open_buf 12 (15) 2019/02/01 09:07
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in relay_open_buf 1 1545d 1545d 0/1 auto-closed as invalid on 2020/06/29 02:36

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8092 Comm: syz-executor405 Not tainted 5.0.0-rc4-next-20190130 #22
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline]
RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458
Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff888088897670 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff88809f2b3080 RCX: 1ffff110110c6919
RDX: 0000000000000008 RSI: ffffffff81833b80 RDI: 0000000000000047
RBP: ffff8880888976e8 R08: 0000000000000006 R09: ffff8880886348c8
R10: ffff888088634000 R11: 0000000000000000 R12: ffff88809f5ef580
R13: ffffffffffffffef R14: 0000000000000000 R15: 0000000000000000
FS:  00000000021c4880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cf090 CR3: 00000000a4ccd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 relay_open_buf kernel/relay.c:447 [inline]
 relay_open kernel/relay.c:597 [inline]
 relay_open+0x5f3/0xaf0 kernel/relay.c:561
 do_blk_trace_setup+0x50d/0xdb0 kernel/trace/blktrace.c:532
 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577
 blk_trace_ioctl+0x170/0x300 kernel/trace/blktrace.c:716
 blkdev_ioctl+0x141/0x2120 block/ioctl.c:591
 block_ioctl+0xee/0x130 fs/block_dev.c:1914
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x107b/0x17d0 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x444af9
Code: e8 cc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db ce fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd22903da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000444af9
RDX: 0000000020000040 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 000000000000d8fa R08: 00000000021c4880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401e60
R13: 0000000000401ef0 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace d79fd6b85e15805c ]---
RIP: 0010:relay_set_buf_dentry kernel/relay.c:412 [inline]
RIP: 0010:relay_open_buf.part.0+0x7cb/0xb40 kernel/relay.c:458
Code: c1 ea 03 80 3c 02 00 0f 85 4c 03 00 00 49 8d 7d 58 4d 89 ac 24 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1b 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffff888088897670 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff88809f2b3080 RCX: 1ffff110110c6919
RDX: 0000000000000008 RSI: ffffffff81833b80 RDI: 0000000000000047
RBP: ffff8880888976e8 R08: 0000000000000006 R09: ffff8880886348c8
R10: ffff888088634000 R11: 0000000000000000 R12: ffff88809f5ef580
R13: ffffffffffffffef R14: 0000000000000000 R15: 0000000000000000
FS:  00000000021c4880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006cf090 CR3: 00000000a4ccd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (287):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/01/30 13:12 linux-next 02495e76ded5 aa432daf .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2019/02/01 05:00 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/02/01 03:55 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/02/01 02:30 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/02/01 02:27 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/02/01 00:20 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 22:45 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 19:48 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 18:43 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 17:42 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 17:34 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 15:47 linux-next 9fe36dd579c7 0e8ea0a3 .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 14:32 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 13:25 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 11:50 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 10:34 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 09:26 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 08:39 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 07:28 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 07:00 linux-next 9fe36dd579c7 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 06:00 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 05:45 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 04:00 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 02:33 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 01:32 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/31 00:24 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 23:24 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 21:34 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 20:52 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 19:21 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 18:12 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 17:01 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 16:11 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 15:07 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 11:46 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 10:43 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 10:10 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:47 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:08 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:07 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:06 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:06 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:03 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:02 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
2019/01/30 09:01 linux-next 02495e76ded5 aa432daf .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.