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: 16946 Comm: syz-executor.5 Not tainted 5.10.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:ext4_xattr_set_entry+0x498/0x3960 fs/ext4/xattr.c:1616 Code: 24 78 48 89 d8 48 c1 e8 03 48 89 84 24 28 01 00 00 42 80 3c 38 00 74 08 48 89 df e8 e2 b3 ba ff 4c 8b 23 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 d1 2e 00 00 4c 89 e8 48 2b 44 24 20 48 RSP: 0018:ffffc90008e26f20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90008e27320 RCX: 0000000000040000 RDX: ffffc9000220a000 RSI: 000000000000037b RDI: 000000000000037c RBP: ffffc90008e271c0 R08: ffffffff81ecc504 R09: ffffed1029d63479 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 000000000000001c R15: dffffc0000000000 FS: 00007fa9a693e700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e024000 CR3: 000000010fb05000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_xattr_ibody_set+0x7c/0x2b0 fs/ext4/xattr.c:2253 ext4_xattr_set_handle+0xc26/0x14e0 fs/ext4/xattr.c:2410 ext4_initxattrs+0xa7/0x120 fs/ext4/xattr_security.c:43 security_inode_init_security+0x252/0x390 security/security.c:1033 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:57 __ext4_new_inode+0x3159/0x3f70 fs/ext4/ialloc.c:1319 ext4_create+0x267/0x530 fs/ext4/namei.c:2770 lookup_open fs/namei.c:3253 [inline] open_last_lookups fs/namei.c:3323 [inline] path_openat+0x1377/0x3000 fs/namei.c:3512 do_filp_open+0x21c/0x460 fs/namei.c:3542 do_sys_openat2+0x13f/0x6e0 fs/open.c:1217 do_sys_open fs/open.c:1233 [inline] __do_sys_creat fs/open.c:1307 [inline] __se_sys_creat fs/open.c:1301 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1301 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fa9a7bcb169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa9a693e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fa9a7ceaf80 RCX: 00007fa9a7bcb169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fa9a7c26ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff4f1f01cf R14: 00007fa9a693e300 R15: 0000000000022000 Modules linked in: ---[ end trace 23b863f893ec8fb4 ]--- RIP: 0010:ext4_xattr_set_entry+0x498/0x3960 fs/ext4/xattr.c:1616 Code: 24 78 48 89 d8 48 c1 e8 03 48 89 84 24 28 01 00 00 42 80 3c 38 00 74 08 48 89 df e8 e2 b3 ba ff 4c 8b 23 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 d1 2e 00 00 4c 89 e8 48 2b 44 24 20 48 RSP: 0018:ffffc90008e26f20 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90008e27320 RCX: 0000000000040000 RDX: ffffc9000220a000 RSI: 000000000000037b RDI: 000000000000037c RBP: ffffc90008e271c0 R08: ffffffff81ecc504 R09: ffffed1029d63479 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 000000000000001c R15: dffffc0000000000 FS: 00007fa9a693e700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e324000 CR3: 000000010fb05000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 24 78 and $0x78,%al 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 38 00 cmpb $0x0,(%rax,%r15,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 e2 b3 ba ff callq 0xffbab402 20: 4c 8b 23 mov (%rbx),%r12 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 d1 2e 00 00 jne 0x2f08 37: 4c 89 e8 mov %r13,%rax 3a: 48 2b 44 24 20 sub 0x20(%rsp),%rax 3f: 48 rex.W