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: 371 Comm: syz-executor160 Not tainted 5.10.160-syzkaller-01321-g003c389455eb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:ext4_xattr_set_entry+0x4a7/0x3820 fs/ext4/xattr.c:1586 Code: 00 00 48 89 d8 48 c1 e8 03 48 89 84 24 28 01 00 00 42 80 3c 20 00 74 08 48 89 df e8 63 79 ba ff 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 8f 2d 00 00 4c 89 f8 48 2b 44 24 18 48 89 RSP: 0018:ffffc9000021ef60 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc9000021f360 RCX: ffff8881178e8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc9000021f1f8 R08: ffffffff81eca8b9 R09: ffffed1023655242 R10: ffffed1023655242 R11: 1ffff11023655241 R12: dffffc0000000000 R13: 1ffff92000043e66 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555556deb300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557ef4e221e8 CR3: 000000011de2c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_xattr_ibody_set+0x7c/0x2a0 fs/ext4/xattr.c:2227 ext4_xattr_set_handle+0xc5d/0x15a0 fs/ext4/xattr.c:2384 ext4_initxattrs+0xb2/0x120 fs/ext4/xattr_security.c:43 security_inode_init_security+0x26c/0x3c0 security/security.c:1033 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:57 __ext4_new_inode+0x3648/0x4530 fs/ext4/ialloc.c:1322 ext4_create+0x266/0x540 fs/ext4/namei.c:2774 lookup_open fs/namei.c:3185 [inline] open_last_lookups fs/namei.c:3255 [inline] path_openat+0x1362/0x2fd0 fs/namei.c:3445 do_filp_open+0x200/0x440 fs/namei.c:3475 do_sys_openat2+0x13b/0x470 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fc451e8eb69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec8b187a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc451e8eb69 RDX: 000000000000275a RSI: 00000000200001c0 RDI: 00000000ffffff9c RBP: 00007fc451e4e170 R08: 00007ffec8b186a0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc451e4e200 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace d9a38d6a18a69e61 ]--- RIP: 0010:ext4_xattr_set_entry+0x4a7/0x3820 fs/ext4/xattr.c:1586 Code: 00 00 48 89 d8 48 c1 e8 03 48 89 84 24 28 01 00 00 42 80 3c 20 00 74 08 48 89 df e8 63 79 ba ff 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 8f 2d 00 00 4c 89 f8 48 2b 44 24 18 48 89 RSP: 0018:ffffc9000021ef60 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc9000021f360 RCX: ffff8881178e8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc9000021f1f8 R08: ffffffff81eca8b9 R09: ffffed1023655242 R10: ffffed1023655242 R11: 1ffff11023655241 R12: dffffc0000000000 R13: 1ffff92000043e66 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555556deb300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557ef4e221e8 CR3: 000000011de2c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 d8 mov %rbx,%rax 5: 48 c1 e8 03 shr $0x3,%rax 9: 48 89 84 24 28 01 00 mov %rax,0x128(%rsp) 10: 00 11: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 63 79 ba ff callq 0xffba7983 20: 4c 8b 33 mov (%rbx),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 8a 04 20 mov (%rax,%r12,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 8f 2d 00 00 jne 0x2dc5 36: 4c 89 f8 mov %r15,%rax 39: 48 2b 44 24 18 sub 0x18(%rsp),%rax 3e: 48 rex.W 3f: 89 .byte 0x89