syzbot


kernel BUG in gfs2_quota_cleanup

Status: fixed on 2024/01/30 15:47
Subsystems: gfs2
[Documentation on labels]
Reported-by: syzbot+3b6e67ac2b646da57862@syzkaller.appspotmail.com
Fix commit: 71733b492200 gfs2: fix kernel BUG in gfs2_quota_cleanup
First crash: 220d, last: 116d
Cause bisection: introduced by (bisect log) :
commit bdcb8aa434c6d36b5c215d02a9ef07551be25a37
Author: Juntong Deng <juntong.deng@outlook.com>
Date: Sun Oct 29 21:10:06 2023 +0000

  gfs2: Fix slab-use-after-free in gfs2_qd_dealloc

Crash: kernel BUG in gfs2_quota_cleanup (log)
Repro: C syz .config
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] gfs2: fix kernel BUG in gfs2_quota_cleanup 2 (2) 2023/12/05 13:51
[syzbot] [gfs2?] kernel BUG in gfs2_quota_cleanup 0 (4) 2023/12/02 21:33
Last patch testing requests (1)
Created Duration User Patch Repo Result
2023/12/02 04:18 1h12m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 994d5c58e50e OK log

Sample crash report:
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
------------[ cut here ]------------
kernel BUG at fs/gfs2/quota.c:1508!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5056 Comm: syz-executor244 Not tainted 6.7.0-rc6-syzkaller-00010-g2cf4f94d8e86 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:gfs2_quota_cleanup+0x6b5/0x6c0 fs/gfs2/quota.c:1508
Code: fe e9 cf fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 2d fe ff ff 4c 89 ef e8 f6 02 23 fe e9 20 fe ff ff e8 1c fe c6 fd 90 <0f> 0b e8 84 03 50 07 0f 1f 40 00 66 0f 1f 00 55 41 57 41 56 41 54
RSP: 0018:ffffc90003a8f9e0 EFLAGS: 00010293
RAX: ffffffff83c76944 RBX: 0000000000000002 RCX: ffff88801e13bb80
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90003a8fb00 R08: ffffffff83c763a0 R09: 1ffff11003ce4815
R10: dffffc0000000000 R11: ffffed1003ce4816 R12: dffffc0000000000
R13: ffff88801e724828 R14: ffff88801c67f580 R15: ffff88801e724000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27ce94fcf8 CR3: 000000000d731000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_put_super+0x2e1/0x940 fs/gfs2/super.c:611
 generic_shutdown_super+0x13a/0x2c0 fs/super.c:696
 kill_block_super+0x44/0x90 fs/super.c:1667
 deactivate_locked_super+0xc1/0x130 fs/super.c:484
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
 task_work_run+0x24a/0x300 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa2c/0x2740 kernel/exit.c:869
 do_group_exit+0x206/0x2c0 kernel/exit.c:1018
 __do_sys_exit_group kernel/exit.c:1029 [inline]
 __se_sys_exit_group kernel/exit.c:1027 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1027
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f27ce905789
Code: Unable to access opcode bytes at 0x7f27ce90575f.
RSP: 002b:00007ffd1d420598 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f27ce905789
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007f27ce9932d0 R08: ffffffffffffffb8 R09: 00007ffd1d420670
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27ce9932d0
R13: 0000000000000000 R14: 00007f27ce994040 R15: 00007f27ce8d3cb0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_quota_cleanup+0x6b5/0x6c0 fs/gfs2/quota.c:1508
Code: fe e9 cf fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 2d fe ff ff 4c 89 ef e8 f6 02 23 fe e9 20 fe ff ff e8 1c fe c6 fd 90 <0f> 0b e8 84 03 50 07 0f 1f 40 00 66 0f 1f 00 55 41 57 41 56 41 54
RSP: 0018:ffffc90003a8f9e0 EFLAGS: 00010293
RAX: ffffffff83c76944 RBX: 0000000000000002 RCX: ffff88801e13bb80
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90003a8fb00 R08: ffffffff83c763a0 R09: 1ffff11003ce4815
R10: dffffc0000000000 R11: ffffed1003ce4816 R12: dffffc0000000000
R13: ffff88801e724828 R14: ffff88801c67f580 R15: ffff88801e724000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27ce9910f8 CR3: 0000000029041000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/19 18:36 upstream 2cf4f94d8e86 3ad490ea .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root kernel BUG in gfs2_quota_cleanup
2023/12/01 23:56 upstream 994d5c58e50e f819d6f7 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root kernel BUG in gfs2_quota_cleanup
2023/09/13 10:30 upstream 3669558bdf35 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in gfs2_quota_cleanup
2023/09/06 14:43 upstream 65d6e954e378 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root kernel BUG in gfs2_quota_cleanup
* Struck through repros no longer work on HEAD.