RBP: 00007f6cc1d72120 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007f6cc119bf80 R15: 00007ffd1035b1f8 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 9956 Comm: syz-executor.3 Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:autofs_fill_super+0x1de/0x880 fs/autofs/inode.c:334 Code: e8 17 43 a6 fe 48 89 df be ed 41 00 00 e8 0a fb ff ff 48 8d 78 04 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 bb RSP: 0018:ffffc90022ee7ce0 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff88815920a000 RCX: ffffc900299c1000 RDX: 0000000000000000 RSI: ffffffff82e04110 RDI: 0000000000000004 RBP: ffff88815155d000 R08: 00000000ffffffff R09: fffffbfff1a27d5e R10: ffffffff8d13eaf3 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8880386590c0 R14: ffffffff82e04240 R15: ffff88814ed87c00 FS: 00007f6cc1d726c0(0000) GS:ffff88806b600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6cc1d71ff8 CR3: 0000000157bca000 CR4: 0000000000350ef0 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+0xd6/0x180 fs/super.c:1357 autofs_get_tree+0x1e2/0x290 fs/autofs/inode.c:398 vfs_get_tree+0x8c/0x370 fs/super.c:1771 do_new_mount fs/namespace.c:3337 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3863 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f6cc107cae9 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:00007f6cc1d720c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6cc119bf80 RCX: 00007f6cc107cae9 RDX: 0000000020000100 RSI: 0000000020000380 RDI: 0000000000000000 RBP: 00007f6cc1d72120 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007f6cc119bf80 R15: 00007ffd1035b1f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:autofs_fill_super+0x1de/0x880 fs/autofs/inode.c:334 Code: e8 17 43 a6 fe 48 89 df be ed 41 00 00 e8 0a fb ff ff 48 8d 78 04 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 bb RSP: 0018:ffffc90022ee7ce0 EFLAGS: 00010247 RAX: dffffc0000000000 RBX: ffff88815920a000 RCX: ffffc900299c1000 RDX: 0000000000000000 RSI: ffffffff82e04110 RDI: 0000000000000004 RBP: ffff88815155d000 R08: 00000000ffffffff R09: fffffbfff1a27d5e R10: ffffffff8d13eaf3 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8880386590c0 R14: ffffffff82e04240 R15: ffff88814ed87c00 FS: 00007f6cc1d726c0(0000) GS:ffff88806b700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f123000 CR3: 0000000157bca000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 17 43 a6 fe call 0xfea6431c 5: 48 89 df mov %rbx,%rdi 8: be ed 41 00 00 mov $0x41ed,%esi d: e8 0a fb ff ff call 0xfffffb1c 12: 48 8d 78 04 lea 0x4(%rax),%rdi 16: 49 89 c4 mov %rax,%r12 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: bb .byte 0xbb