general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 3592 Comm: syz.6.789 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:traverse_mounts fs/namei.c:1365 [inline] RIP: 0010:handle_mounts fs/namei.c:1485 [inline] RIP: 0010:step_into+0x122/0xcf0 fs/namei.c:1790 Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90000c37760 EFLAGS: 00010203 RAX: 0000000000000001 RBX: ffffc90000c37c40 RCX: 0000000000080000 RDX: ffffc90000c37c78 RSI: 0000000000000e0e RDI: 0000000000000e0f RBP: ffffc90000c37850 R08: 0000000000000000 R09: ffffed1025785e45 R10: ffffed1025785e45 R11: 1ffff11025785e44 R12: dffffc0000000000 R13: 1ffff92000186f8f R14: 0000000000000011 R15: 000000000000000f FS: 00007eff838846c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2fed7c CR3: 000000011af59000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: walk_component+0x26a/0x460 fs/namei.c:1966 link_path_walk+0x5b2/0xb80 fs/namei.c:-1 path_openat+0x27c/0x3160 fs/namei.c:3513 do_filp_open+0x1b3/0x3e0 fs/namei.c:3544 do_sys_openat2+0x14c/0x6d0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_openat fs/open.c:1249 [inline] __se_sys_openat fs/open.c:1244 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1244 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7eff84e3d749 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:00007eff83884038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007eff85094090 RCX: 00007eff84e3d749 RDX: 0000000000040800 RSI: 0000200000000040 RDI: 000000000000000b RBP: 00007eff84ec1f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007eff85094128 R14: 00007eff85094090 R15: 00007fffd065b5f8 Modules linked in: ---[ end trace 399e878deefbc89f ]--- RIP: 0010:traverse_mounts fs/namei.c:1365 [inline] RIP: 0010:handle_mounts fs/namei.c:1485 [inline] RIP: 0010:step_into+0x122/0xcf0 fs/namei.c:1790 Code: c6 44 24 5f 00 43 0f b6 44 25 00 84 c0 48 8b 54 24 08 0f 85 51 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 56 0a 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90000c37760 EFLAGS: 00010203 RAX: 0000000000000001 RBX: ffffc90000c37c40 RCX: 0000000000080000 RDX: ffffc90000c37c78 RSI: 0000000000000e0e RDI: 0000000000000e0f RBP: ffffc90000c37850 R08: 0000000000000000 R09: ffffed1025785e45 R10: ffffed1025785e45 R11: 1ffff11025785e44 R12: dffffc0000000000 R13: 1ffff92000186f8f R14: 0000000000000011 R15: 000000000000000f FS: 00007eff838846c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000005b80 CR3: 000000011af59000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c6 44 24 5f 00 movb $0x0,0x5f(%rsp) 5: 43 0f b6 44 25 00 movzbl 0x0(%r13,%r12,1),%eax b: 84 c0 test %al,%al d: 48 8b 54 24 08 mov 0x8(%rsp),%rdx 12: 0f 85 51 0a 00 00 jne 0xa69 18: 44 8b 32 mov (%rdx),%r14d 1b: 4c 8b bc 24 88 00 00 mov 0x88(%rsp),%r15 22: 00 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 56 0a 00 00 jne 0xa8d 37: 45 8b 3f mov (%r15),%r15d 3a: 44 89 fe mov %r15d,%esi 3d: 81 .byte 0x81 3e: e6 00 out %al,$0x0