general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 21172 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-15601-g4bbdb725a36b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:autofs_fill_super+0x47d/0xb50 fs/autofs/inode.c:334 Code: 03 60 d7 9f 8b 4d 8d 67 04 48 8b 14 24 48 89 d0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 58 03 00 00 8b 1a 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 4c 89 f5 0f 85 61 03 00 00 41 89 5f 04 4d 8d RSP: 0018:ffffc90004747c90 EFLAGS: 00010247 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff88802a468460 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff888071e3a580 R08: ffffffff8da2aa13 R09: 1ffffffff1b45542 R10: dffffc0000000000 R11: fffffbfff1b45543 R12: 0000000000000004 R13: ffff888071e3a500 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007faea44be6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020007000 CR3: 0000000027bcc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vfs_get_super fs/super.c:1338 [inline] get_tree_nodev+0xb4/0x140 fs/super.c:1357 vfs_get_tree+0x8c/0x280 fs/super.c:1771 do_new_mount+0x28f/0xae0 fs/namespace.c:3337 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7faea367cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007faea44be0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007faea379bf80 RCX: 00007faea367cae9 RDX: 0000000020000040 RSI: 0000000020000380 RDI: 0000000000000000 RBP: 00007faea44be120 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007faea379bf80 R15: 00007ffc2e5510b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:autofs_fill_super+0x47d/0xb50 fs/autofs/inode.c:334 Code: 03 60 d7 9f 8b 4d 8d 67 04 48 8b 14 24 48 89 d0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 58 03 00 00 8b 1a 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 4c 89 f5 0f 85 61 03 00 00 41 89 5f 04 4d 8d RSP: 0018:ffffc90004747c90 EFLAGS: 00010247 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffff88802a468460 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff888071e3a580 R08: ffffffff8da2aa13 R09: 1ffffffff1b45542 R10: dffffc0000000000 R11: fffffbfff1b45543 R12: 0000000000000004 R13: ffff888071e3a500 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007faea44be6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7e7578038 CR3: 0000000027bcc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 60 d7 add -0x29(%rax),%esp 3: 9f lahf 4: 8b 4d 8d mov -0x73(%rbp),%ecx 7: 67 04 48 addr32 add $0x48,%al a: 8b 14 24 mov (%rsp),%edx d: 48 89 d0 mov %rdx,%rax 10: 48 c1 e8 03 shr $0x3,%rax 14: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 19: 84 c0 test %al,%al 1b: 0f 85 58 03 00 00 jne 0x379 21: 8b 1a mov (%rdx),%ebx 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 4c 89 f5 mov %r14,%rbp 34: 0f 85 61 03 00 00 jne 0x39b 3a: 41 89 5f 04 mov %ebx,0x4(%r15) 3e: 4d rex.WRB 3f: 8d .byte 0x8d