syzbot


WARNING in bdev_file_open_by_dev

Status: upstream: reported C repro on 2024/02/09 18:08
Subsystems: block
[Documentation on labels]
Reported-by: syzbot+96f61f1ad84e33cee93e@syzkaller.appspotmail.com
First crash: 67d, last: 63d
Cause bisection: introduced by (bisect log) :
commit e6d7c6cd8e6aeb8b4add207d31dff240680ff573
Author: Christian Brauner <brauner@kernel.org>
Date: Tue Jan 23 13:26:20 2024 +0000

  block/genhd: port disk_scan_partitions() to file

Crash: WARNING in bdev_file_open_by_dev (log)
Repro: C syz .config
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [block?] WARNING in bdev_file_open_by_dev 3 (7) 2024/02/10 15:32
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/02/27 07:46 22m retest repro linux-next error OK
2024/02/10 08:52 20m brauner@kernel.org https://gitlab.com/brauner/linux vfs.super OK log
2024/02/09 22:35 0m brauner@kernel.org git@gitlab.com:brauner/linux.git vfs.super error OK

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5075 at block/bdev.c:930 blk_to_file_flags block/bdev.c:930 [inline]
WARNING: CPU: 1 PID: 5075 at block/bdev.c:930 bdev_file_open_by_dev+0x112/0x270 block/bdev.c:963
Modules linked in:
CPU: 1 PID: 5075 Comm: syz-executor215 Not tainted 6.8.0-rc3-next-20240209-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:blk_to_file_flags block/bdev.c:930 [inline]
RIP: 0010:bdev_file_open_by_dev+0x112/0x270 block/bdev.c:963
Code: 04 b2 14 fd 44 89 e8 83 e0 02 75 23 44 89 ee 83 e6 01 45 31 e4 31 ff e8 ec b1 14 fd 44 89 e8 83 e0 01 75 18 e8 9f ad 14 fd 90 <0f> 0b 90 eb 12 e8 94 ad 14 fd 41 bc 01 00 00 00 eb 05 e8 87 ad 14
RSP: 0018:ffffc90003457b58 EFLAGS: 00010293
RAX: ffffffff847f2dc1 RBX: 0000000000000000 RCX: ffff8880786e9e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801d0a8000 R08: ffffffff847f2db4 R09: 1ffff11003a1510b
R10: dffffc0000000000 R11: ffffed1003a1510c R12: 0000000000000000
R13: 0000000000000010 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555556bbe380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005fdeb8 CR3: 00000000785f2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 disk_scan_partitions+0x1be/0x2b0 block/genhd.c:369
 blkdev_common_ioctl+0x15cc/0x2880 block/ioctl.c:558
 blkdev_ioctl+0x532/0x740 block/ioctl.c:627
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:857
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f07197090e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd2bd39c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fffd2bd3b98 RCX: 00007f07197090e9
RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000003
RBP: 00007f071977c610 R08: 002364626e2f7665 R09: 00007fffd2bd3b98
R10: 000000000000001f R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffd2bd3b88 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/09 12:16 linux-next 445a555e0623 7f07e9b0 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/13 01:58 linux-next ae00c445390b 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/12 14:42 linux-next ae00c445390b 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/11 22:24 linux-next 445a555e0623 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/10 09:49 linux-next 445a555e0623 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/10 04:57 linux-next 445a555e0623 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
2024/02/09 12:00 linux-next 445a555e0623 7f07e9b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bdev_file_open_by_dev
* Struck through repros no longer work on HEAD.