Hello, syzbot found the following issue on: HEAD commit: 65d6e954e378 Merge tag 'gfs2-v6.5-rc5-fixes' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1294ea14680000 kernel config: https://syzkaller.appspot.com/x/.config?x=b273cdfbc13e9a4b dashboard link: https://syzkaller.appspot.com/bug?extid=ac749796740f1d4348bc compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-65d6e954.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cdf5375ab649/vmlinux-65d6e954.xz kernel image: https://storage.googleapis.com/syzbot-assets/302d058f1d48/bzImage-65d6e954.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ac749796740f1d4348bc@xxxxxxxxxxxxxxxxxxxxxxxxx kernel BUG at fs/gfs2/quota.c:323! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5188 Comm: syz-executor.2 Not tainted 6.5.0-syzkaller-11938-g65d6e954e378 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:qd_put+0x132/0x190 fs/gfs2/quota.c:323 Code: c7 43 70 00 00 00 00 48 8d 73 78 e8 48 7e 1e fe 4c 89 e7 e8 f0 24 9a 06 5b 5d 41 5c 41 5d 41 5e e9 c3 ef e0 fd e8 be ef e0 fd <0f> 0b e8 b7 ef e0 fd 4c 89 e7 e8 cf 07 7a 00 4c 89 e7 e8 c7 24 9a RSP: 0018:ffffc90004017c30 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880269c23f0 RCX: 0000000000000000 RDX: ffff8880164fc800 RSI: ffffffff83a6b442 RDI: 0000000000000005 RBP: 00000000ffffff80 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffff80 R11: 0000000000000000 R12: ffff8880269c2420 R13: ffff8880269c2460 R14: ffff8880276aca68 R15: ffff88802441f008 FS: 0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:000000005771d400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7268bb0 CR3: 0000000076871000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> gfs2_quota_sync+0x44b/0x630 fs/gfs2/quota.c:1350 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:667 sync_filesystem fs/sync.c:56 [inline] sync_filesystem+0x109/0x280 fs/sync.c:30 generic_shutdown_super+0x7e/0x3c0 fs/super.c:666 kill_block_super+0x3b/0x70 fs/super.c:1646 gfs2_kill_sb+0x361/0x410 fs/gfs2/ops_fstype.c:1811 deactivate_locked_super+0x9a/0x170 fs/super.c:481 deactivate_super+0xde/0x100 fs/super.c:514 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254 task_work_run+0x14d/0x240 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 __do_fast_syscall_32+0x6d/0xe0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7fe8579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffd6aa88 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ffd6ab30 RCX: 000000000000000a RDX: 00000000f7353ff4 RSI: 00000000f72a53bd RDI: 00000000ffd6bbd4 RBP: 00000000ffd6ab30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:qd_put+0x132/0x190 fs/gfs2/quota.c:323 Code: c7 43 70 00 00 00 00 48 8d 73 78 e8 48 7e 1e fe 4c 89 e7 e8 f0 24 9a 06 5b 5d 41 5c 41 5d 41 5e e9 c3 ef e0 fd e8 be ef e0 fd <0f> 0b e8 b7 ef e0 fd 4c 89 e7 e8 cf 07 7a 00 4c 89 e7 e8 c7 24 9a RSP: 0018:ffffc90004017c30 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8880269c23f0 RCX: 0000000000000000 RDX: ffff8880164fc800 RSI: ffffffff83a6b442 RDI: 0000000000000005 RBP: 00000000ffffff80 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffff80 R11: 0000000000000000 R12: ffff8880269c2420 R13: ffff8880269c2460 R14: ffff8880276aca68 R15: ffff88802441f008 FS: 0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:000000005771d400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7268bb0 CR3: 0000000076871000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
