loop2: detected capacity change from 0 to 32768 general protection fault, probably for non-canonical address 0xdffffc000000001c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000e0-0x00000000000000e7] CPU: 0 PID: 25472 Comm: syz-executor.2 Not tainted 6.1.0-rc8-next-20221207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:gfs2_get_tree+0xb8/0x270 fs/gfs2/ops_fstype.c:1342 Code: 03 80 3c 02 00 0f 85 9f 01 00 00 4c 8b bb b0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bf e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 62 01 00 00 4d 8b b7 e0 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc900068b7d50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888036c15800 RCX: ffffc9001a7a1000 RDX: 000000000000001c RSI: ffffffff83925ec7 RDI: 00000000000000e0 RBP: ffff888076c83200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888036c158b0 R14: ffff888036c15800 R15: 0000000000000000 FS: 00007fa57f6a0700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f68252516b0 CR3: 00000000876a2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_get_tree+0x8d/0x2f0 fs/super.c:1489 do_new_mount fs/namespace.c:3145 [inline] path_mount+0x132a/0x1e20 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa57e88d60a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa57f69ff88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000133e6 RCX: 00007fa57e88d60a RDX: 0000000020013400 RSI: 0000000020013440 RDI: 00007fa57f69ffe0 RBP: 00007fa57f6a0020 R08: 00007fa57f6a0020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020013400 R13: 0000000020013440 R14: 00007fa57f69ffe0 R15: 00000000200000c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:gfs2_get_tree+0xb8/0x270 fs/gfs2/ops_fstype.c:1342 Code: 03 80 3c 02 00 0f 85 9f 01 00 00 4c 8b bb b0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bf e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 62 01 00 00 4d 8b b7 e0 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc900068b7d50 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888036c15800 RCX: ffffc9001a7a1000 RDX: 000000000000001c RSI: ffffffff83925ec7 RDI: 00000000000000e0 RBP: ffff888076c83200 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888036c158b0 R14: ffff888036c15800 R15: 0000000000000000 FS: 00007fa57f6a0700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbc0fb821b8 CR3: 00000000876a2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax 6: 85 9f 01 00 00 4c test %ebx,0x4c000001(%rdi) c: 8b bb b0 00 00 00 mov 0xb0(%rbx),%edi 12: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 19: fc ff df 1c: 49 8d bf e0 00 00 00 lea 0xe0(%r15),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 62 01 00 00 jne 0x196 34: 4d 8b b7 e0 00 00 00 mov 0xe0(%r15),%r14 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)