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: 5397 Comm: syz-executor198 Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1457 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2266 [inline] RIP: 0010:gfs2_dump_glock+0xdcd/0x1ad0 fs/gfs2/glock.c:2382 Code: 05 22 3c cc 0a 01 48 c7 c7 40 fe 4c 8b be ef 02 00 00 48 c7 c2 80 fe 4c 8b e8 6f 89 b4 fd 4d 8d 74 24 20 4d 89 f5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 f1 06 00 00 41 0f b7 1e 89 de 81 e6 RSP: 0018:ffffc9000421f160 EFLAGS: 00010207 RAX: ffffffff83b742b9 RBX: 0000000000000001 RCX: ffff88802c0e0000 RDX: 0000000000000000 RSI: ffffffff8b58adc0 RDI: ffffffff8b58ad80 RBP: ffffc9000421f450 R08: ffffffff83b742a7 R09: 1ffffffff20f6860 R10: dffffc0000000000 R11: fffffbfff20f6861 R12: 0000000000000046 R13: 000000000000000c R14: 0000000000000066 R15: dffffc0000000000 FS: 00007f01282bb6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f012829ad58 CR3: 000000007ce43000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:448 gfs2_dirent_scan+0x512/0x640 fs/gfs2/dir.c:602 gfs2_dirent_search+0x30e/0x8c0 fs/gfs2/dir.c:850 gfs2_dir_search+0xb2/0x2f0 fs/gfs2/dir.c:1650 gfs2_lookupi+0x460/0x5d0 fs/gfs2/inode.c:332 __gfs2_lookup+0xa4/0x270 fs/gfs2/inode.c:888 gfs2_atomic_open+0x9e/0x230 fs/gfs2/inode.c:1289 atomic_open fs/namei.c:3355 [inline] lookup_open fs/namei.c:3463 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0x1044/0x3180 fs/namei.c:3790 do_filp_open+0x234/0x490 fs/namei.c:3820 do_sys_openat2+0x13e/0x1d0 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f012f71fa59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f01282bb218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f012f7b96b8 RCX: 00007f012f71fa59 RDX: 0000000000000300 RSI: 0000000020000540 RDI: 00000000ffffff9c RBP: 00007f012f7b96b0 R08: 00007ffd5690c897 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f012f7b96bc R13: 0030656c69662f2e R14: 00007f012f7740c0 R15: 0032656c69662f2e Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1457 [inline] RIP: 0010:dump_holder fs/gfs2/glock.c:2266 [inline] RIP: 0010:gfs2_dump_glock+0xdcd/0x1ad0 fs/gfs2/glock.c:2382 Code: 05 22 3c cc 0a 01 48 c7 c7 40 fe 4c 8b be ef 02 00 00 48 c7 c2 80 fe 4c 8b e8 6f 89 b4 fd 4d 8d 74 24 20 4d 89 f5 49 c1 ed 03 <43> 0f b6 44 3d 00 84 c0 0f 85 f1 06 00 00 41 0f b7 1e 89 de 81 e6 RSP: 0018:ffffc9000421f160 EFLAGS: 00010207 RAX: ffffffff83b742b9 RBX: 0000000000000001 RCX: ffff88802c0e0000 RDX: 0000000000000000 RSI: ffffffff8b58adc0 RDI: ffffffff8b58ad80 RBP: ffffc9000421f450 R08: ffffffff83b742a7 R09: 1ffffffff20f6860 R10: dffffc0000000000 R11: fffffbfff20f6861 R12: 0000000000000046 R13: 000000000000000c R14: 0000000000000066 R15: dffffc0000000000 FS: 00007f01282bb6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f012829ad58 CR3: 000000007ce43000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 05 22 3c cc 0a add $0xacc3c22,%eax 5: 01 48 c7 add %ecx,-0x39(%rax) 8: c7 40 fe 4c 8b be ef movl $0xefbe8b4c,-0x2(%rax) f: 02 00 add (%rax),%al 11: 00 48 c7 add %cl,-0x39(%rax) 14: c2 80 fe ret $0xfe80 17: 4c 8b e8 mov %rax,%r13 1a: 6f outsl %ds:(%rsi),(%dx) 1b: 89 b4 fd 4d 8d 74 24 mov %esi,0x24748d4d(%rbp,%rdi,8) 22: 20 4d 89 and %cl,-0x77(%rbp) 25: f5 cmc 26: 49 c1 ed 03 shr $0x3,%r13 * 2a: 43 0f b6 44 3d 00 movzbl 0x0(%r13,%r15,1),%eax <-- trapping instruction 30: 84 c0 test %al,%al 32: 0f 85 f1 06 00 00 jne 0x729 38: 41 0f b7 1e movzwl (%r14),%ebx 3c: 89 de mov %ebx,%esi 3e: 81 .byte 0x81 3f: e6 .byte 0xe6