syzbot


kernel BUG in ext4_enable_quotas

Status: upstream: reported C repro on 2023/08/21 04:17
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+2bf413b73340f4011a9f@syzkaller.appspotmail.com
First crash: 242d, last: 32d
Cause bisection: failed (error log, bisect log)
  
Bug presence (2)
Date Name Commit Repro Result
2023/08/21 lts (merge base) b1644a0031cf C [report] kernel BUG in ext4_enable_quotas
2023/08/21 upstream (ToT) 706a74159504 C [report] kernel BUG in ext4_enable_quotas
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 kernel BUG in ext4_enable_quotas C 2 12h39m 242d 0/2 upstream: reported C repro on 2023/08/20 19:02
android-5-15 kernel BUG in ext4_enable_quotas origin:upstream C 1 12d 215d 0/2 upstream: reported C repro on 2023/09/16 16:19
upstream kernel BUG in ext4_enable_quotas ext4 C error done 16 106d 287d 26/26 fixed on 2024/02/16 19:40
Fix bisection attempts (6)
Created Duration User Patch Repo Result
2024/03/17 07:12 1h11m bisect fix android14-6.1 job log (0) log
2024/02/12 19:20 1h17m bisect fix android14-6.1 job log (0) log
2024/01/07 03:47 1h11m bisect fix android14-6.1 job log (0) log
2023/12/07 21:54 1h35m bisect fix android14-6.1 job log (0) log
2023/11/07 07:41 1h17m bisect fix android14-6.1 job log (0) log
2023/10/05 21:35 1h31m bisect fix android14-6.1 job log (0) log

Sample crash report:
loop1: detected capacity change from 0 to 512
------------[ cut here ]------------
kernel BUG at fs/ext4/super.c:6918!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 493 Comm: syz-executor326 Not tainted 6.1.25-syzkaller-00052-gc2611a04b92f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:ext4_quota_enable fs/ext4/super.c:6918 [inline]
RIP: 0010:ext4_enable_quotas+0x96a/0x980 fs/ext4/super.c:6965
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4f f9 ff ff 49 89 d7 48 89 df e8 93 a8 bb ff 4c 89 fa e9 3c f9 ff ff e8 06 59 75 ff <0f> 0b e8 ff 58 75 ff 0f 0b e8 b8 78 f4 02 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900014377c0 EFLAGS: 00010293
RAX: ffffffff81ff958a RBX: 0000000000000000 RCX: ffff888115729440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001437930 R08: ffffffff81ff9087 R09: ffffed102170dc83
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: 0000000000000004 R14: dffffc0000000000 R15: ffff88812317f464
FS:  00007efd4eb8c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc3690dff8 CR3: 0000000113b49000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4_fill_super fs/ext4/super.c:5501 [inline]
 ext4_fill_super+0x7b1f/0x8450 fs/ext4/super.c:5644
 get_tree_bdev+0x440/0x680 fs/super.c:1348
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5674
 vfs_get_tree+0x88/0x290 fs/super.c:1555
 do_new_mount+0x28b/0xac0 fs/namespace.c:3040
 path_mount+0x671/0x1070 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3568
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efd4ebd95aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 6e 07 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd4eb8bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007efd4ebd95aa
RDX: 00000000200005c0 RSI: 0000000020000000 RDI: 00007efd4eb8bfe0
RBP: 00000000200005c0 R08: 00007efd4eb8c020 R09: 00000000000004d4
R10: 0000000000200810 R11: 0000000000000202 R12: 00007efd4eb8bfe0
R13: 0000000020000000 R14: 00000000000004da R15: 00007efd4eb8c020
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_quota_enable fs/ext4/super.c:6918 [inline]
RIP: 0010:ext4_enable_quotas+0x96a/0x980 fs/ext4/super.c:6965
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4f f9 ff ff 49 89 d7 48 89 df e8 93 a8 bb ff 4c 89 fa e9 3c f9 ff ff e8 06 59 75 ff <0f> 0b e8 ff 58 75 ff 0f 0b e8 b8 78 f4 02 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900014377c0 EFLAGS: 00010293
RAX: ffffffff81ff958a RBX: 0000000000000000 RCX: ffff888115729440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001437930 R08: ffffffff81ff9087 R09: ffffed102170dc83
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: 0000000000000004 R14: dffffc0000000000 R15: ffff88812317f464
FS:  00007efd4eb8c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd4ec24194 CR3: 0000000113b49000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/21 04:16 android14-6.1 c2611a04b92f d216d8a0 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-android-6-1 kernel BUG in ext4_enable_quotas
* Struck through repros no longer work on HEAD.