general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 PID: 7344 Comm: syz.4.467 Not tainted 6.6.100-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1502 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2308 [inline] RIP: 0010:gfs2_dump_glock+0xd5f/0x1920 fs/gfs2/glock.c:2424 Code: e0 8d ef 8a be 14 03 00 00 48 c7 c2 20 8e ef 8a e8 f6 ae c8 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 10 06 00 00 48 89 5c 24 38 0f b7 1b 89 RSP: 0018:ffffc90004046ee0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000066 RCX: 0000000000080000 RDX: ffffc90019a01000 RSI: 00000000000601b6 RDI: 00000000000601b7 RBP: ffffc900040471d0 R08: dffffc0000000000 R09: 1ffffffff21b46a4 R10: dffffc0000000000 R11: fffffbfff21b46a5 R12: ffffffff839f0b9f R13: 0000000000000046 R14: 000000000000000c R15: 0000000000000000 FS: 00007f6bed8766c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f667adb1512 CR3: 00000000750d3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000800 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:455 gfs2_dirent_scan+0x525/0x650 fs/gfs2/dir.c:602 gfs2_dirent_search+0x2e1/0x7e0 fs/gfs2/dir.c:850 gfs2_dir_search+0x4d/0x220 fs/gfs2/dir.c:1650 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:339 __gfs2_lookup+0x90/0x270 fs/gfs2/inode.c:896 __lookup_slow+0x281/0x3b0 fs/namei.c:1694 lookup_slow+0x53/0x70 fs/namei.c:1711 walk_component fs/namei.c:2002 [inline] link_path_walk+0x970/0xe00 fs/namei.c:2329 path_lookupat+0x9d/0x440 fs/namei.c:2482 do_o_path+0x98/0x1f0 fs/namei.c:3760 path_openat+0x2a31/0x3190 fs/namei.c:3782 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_openat fs/open.c:1450 [inline] __se_sys_openat fs/open.c:1445 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1445 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6bec98e9a9 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:00007f6bed876038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f6becbb6080 RCX: 00007f6bec98e9a9 RDX: 0000000000200002 RSI: 00002000000000c0 RDI: ffffffffffffff9c RBP: 00007f6beca10d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f6becbb6080 R15: 00007fff1bee01e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1502 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2308 [inline] RIP: 0010:gfs2_dump_glock+0xd5f/0x1920 fs/gfs2/glock.c:2424 Code: e0 8d ef 8a be 14 03 00 00 48 c7 c2 20 8e ef 8a e8 f6 ae c8 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 10 06 00 00 48 89 5c 24 38 0f b7 1b 89 RSP: 0018:ffffc90004046ee0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000066 RCX: 0000000000080000 RDX: ffffc90019a01000 RSI: 00000000000601b6 RDI: 00000000000601b7 RBP: ffffc900040471d0 R08: dffffc0000000000 R09: 1ffffffff21b46a4 R10: dffffc0000000000 R11: fffffbfff21b46a5 R12: ffffffff839f0b9f R13: 0000000000000046 R14: 000000000000000c R15: 0000000000000000 FS: 00007f6bed8766c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d417ff8 CR3: 00000000750d3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000800 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e0 8d loopne 0xffffff8f 2: ef out %eax,(%dx) 3: 8a be 14 03 00 00 mov 0x314(%rsi),%bh 9: 48 c7 c2 20 8e ef 8a mov $0xffffffff8aef8e20,%rdx 10: e8 f6 ae c8 fd call 0xfdc8af0b 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 10 06 00 00 jne 0x647 37: 48 89 5c 24 38 mov %rbx,0x38(%rsp) 3c: 0f b7 1b movzwl (%rbx),%ebx 3f: 89 .byte 0x89