gfs2: fsid=syz:syz.0: G: s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 p:0 gfs2: fsid=syz:syz.0: H: s:EX f:cH e:0 p:5208 [syz-executor.2] gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 ------------[ cut here ]------------ kernel BUG at fs/gfs2/glock.c:1560! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 3 PID: 5208 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:add_to_queue fs/gfs2/glock.c:1560 [inline] RIP: 0010:gfs2_glock_nq+0xc7b/0x1cd0 fs/gfs2/glock.c:1604 Code: 03 0f 8e 56 0d 00 00 8b 53 18 48 89 ee 48 c7 c7 20 ab 59 8b e8 d6 8c b7 fd 48 8b 34 24 ba 01 00 00 00 31 ff e8 06 4f ff ff 90 <0f> 0b e8 fe bc d6 fd 48 8b 7c 24 18 49 8d ac 24 80 00 00 00 e8 6c RSP: 0018:ffffc90003fffa38 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88805c134fa0 RCX: fffff520007ffef8 RDX: ffff8880202c2440 RSI: ffffffff83b70e4b RDI: ffffffff8b59e270 RBP: ffff888011b69270 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000005 R12: ffff88804a924000 R13: 0000000000001458 R14: ffff88805c135020 R15: ffff8880616f5500 FS: 0000000000000000(0000) GS:ffff88802c500000(0063) knlGS:00000000580cf400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000030d27000 CR3: 000000004a922000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline] do_sync+0x45a/0xd30 fs/gfs2/quota.c:946 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x82/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf727d579 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:00000000ff9afe18 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ff9afec0 RCX: 0000000000000009 RDX: 00000000f73d4ff4 RSI: 00000000f73243bd RDI: 00000000ff9b0f64 RBP: 00000000ff9afec0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:add_to_queue fs/gfs2/glock.c:1560 [inline] RIP: 0010:gfs2_glock_nq+0xc7b/0x1cd0 fs/gfs2/glock.c:1604 Code: 03 0f 8e 56 0d 00 00 8b 53 18 48 89 ee 48 c7 c7 20 ab 59 8b e8 d6 8c b7 fd 48 8b 34 24 ba 01 00 00 00 31 ff e8 06 4f ff ff 90 <0f> 0b e8 fe bc d6 fd 48 8b 7c 24 18 49 8d ac 24 80 00 00 00 e8 6c RSP: 0018:ffffc90003fffa38 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88805c134fa0 RCX: fffff520007ffef8 RDX: ffff8880202c2440 RSI: ffffffff83b70e4b RDI: ffffffff8b59e270 RBP: ffff888011b69270 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000005 R12: ffff88804a924000 R13: 0000000000001458 R14: ffff88805c135020 R15: ffff8880616f5500 FS: 0000000000000000(0000) GS:ffff88802c500000(0063) knlGS:00000000580cf400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000030d27000 CR3: 000000004a922000 CR4: 0000000000350ef0 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