gfs2: fsid=syz:syz.0: gfs2_check_dirent: name length is greater than space in dirent (first in block) gfs2: fsid=syz:syz.0: fatal: filesystem consistency error - inode = 12 2341, function = gfs2_dirent_scan, file = fs/gfs2/dir.c, line = 575 gfs2: fsid=syz:syz.0: G: s:SH n:2/925 f:aqob t:SH d:EX/0 a:0 v:0 r:4 m:20 p:1 gfs2: fsid=syz:syz.0: H: s:SH f:H e:0 p:5364 [syz.0.0] __gfs2_lookup+0x8f/0x270 fs/gfs2/inode.c:975 gfs2: fsid=syz:syz.0: H: s:SH f:H e:0 p:5371 [syz.0.0] __gfs2_lookup+0x8f/0x270 fs/gfs2/inode.c:975 Oops: general protection fault, probably for non-canonical address 0xe0de364969ea55e4: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x06f1d24b4f52af20-0x06f1d24b4f52af27] CPU: 0 UID: 0 PID: 5372 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1467 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2291 [inline] RIP: 0010:gfs2_dump_glock+0x1033/0x1c50 fs/gfs2/glock.c:2413 Code: c0 9b d0 8b be 4b 03 00 00 48 c7 c2 00 9c d0 8b e8 f2 9b a7 fd 49 8d 5d 20 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 28 06 00 00 48 89 5c 24 28 0f b7 1b 89 RSP: 0018:ffffc9000d3f70e0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 06f1d24b4f52af20 RCX: 0000000000100000 RDX: ffffc90020802000 RSI: 00000000000026c5 RDI: 00000000000026c6 RBP: ffffc9000d3f73d0 R08: 0000000000000000 R09: ffffffff83f5e723 R10: dffffc0000000000 R11: fffffbfff1f46887 R12: ffffffff83f5e723 R13: 06f1d24b4f52af00 R14: 00de3a4969ea55e4 R15: 0000000000000000 FS: 00007f340ffb06c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34024a4000 CR3: 0000000043e0b000 CR4: 0000000000352ef0 Call Trace: gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:448 gfs2_dirent_scan+0x545/0x690 fs/gfs2/dir.c:-1 gfs2_dirent_search+0x2e0/0x7e0 fs/gfs2/dir.c:854 gfs2_dir_search+0x4c/0x220 fs/gfs2/dir.c:1651 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:340 __gfs2_lookup+0x8f/0x270 fs/gfs2/inode.c:975 __lookup_slow+0x297/0x3d0 fs/namei.c:1808 lookup_slow+0x53/0x70 fs/namei.c:1825 walk_component+0x2d2/0x400 fs/namei.c:2129 lookup_last fs/namei.c:2630 [inline] path_lookupat+0x163/0x430 fs/namei.c:2654 filename_lookup+0x212/0x570 fs/namei.c:2683 vfs_statx+0xf8/0x550 fs/stat.c:353 vfs_fstatat+0x118/0x170 fs/stat.c:375 __do_sys_newfstatat fs/stat.c:542 [inline] __se_sys_newfstatat fs/stat.c:536 [inline] __x64_sys_newfstatat+0x116/0x190 fs/stat.c:536 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f340f18eb69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f340ffb0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007f340f3b6240 RCX: 00007f340f18eb69 RDX: 0000200000000180 RSI: 0000200000000100 RDI: ffffffffffffff9c RBP: 00007f340f211df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f340f3b6240 R15: 00007ffefcf737c8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1467 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2291 [inline] RIP: 0010:gfs2_dump_glock+0x1033/0x1c50 fs/gfs2/glock.c:2413 Code: c0 9b d0 8b be 4b 03 00 00 48 c7 c2 00 9c d0 8b e8 f2 9b a7 fd 49 8d 5d 20 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 28 06 00 00 48 89 5c 24 28 0f b7 1b 89 RSP: 0018:ffffc9000d3f70e0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 06f1d24b4f52af20 RCX: 0000000000100000 RDX: ffffc90020802000 RSI: 00000000000026c5 RDI: 00000000000026c6 RBP: ffffc9000d3f73d0 R08: 0000000000000000 R09: ffffffff83f5e723 R10: dffffc0000000000 R11: fffffbfff1f46887 R12: ffffffff83f5e723 R13: 06f1d24b4f52af00 R14: 00de3a4969ea55e4 R15: 0000000000000000 FS: 00007f340ffb06c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3402fff000 CR3: 0000000043e0b000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: c0 9b d0 8b be 4b 03 rcrb $0x3,0x4bbe8bd0(%rbx) 7: 00 00 add %al,(%rax) 9: 48 c7 c2 00 9c d0 8b mov $0xffffffff8bd09c00,%rdx 10: e8 f2 9b a7 fd call 0xfda79c07 15: 49 8d 5d 20 lea 0x20(%r13),%rbx 19: 49 89 de mov %rbx,%r14 1c: 49 c1 ee 03 shr $0x3,%r14 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 41 0f b6 04 06 movzbl (%r14,%rax,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 28 06 00 00 jne 0x65f 37: 48 89 5c 24 28 mov %rbx,0x28(%rsp) 3c: 0f b7 1b movzwl (%rbx),%ebx 3f: 89 .byte 0x89