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: 383 Comm: syz-executor.0 Not tainted 5.10.140-syzkaller-00825-g59390358870a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:ext4_xattr_set_entry+0x4ad/0x37e0 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 1d 97 ba ff 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 46 2d 00 00 4c 89 f8 48 2b 44 24 18 48 89 RSP: 0018:ffffc90000c773a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90000c777a0 RCX: ffff88811cd4a780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc90000c77638 R08: ffffffff81ec6059 R09: ffffed1029c48479 R10: ffffed1029c48479 R11: 1ffff11029c48478 R12: dffffc0000000000 R13: 1ffff9200018eeee R14: 0000000000000000 R15: 0000000000000000 FS: 00005555555b3400(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555555c4b78 CR3: 00000001464b0000 CR4: 00000000003506a0 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_mkdir+0x3b3/0xbb0 fs/ext4/namei.c:2947 vfs_mkdir+0x435/0x610 fs/namei.c:3729 do_mkdirat+0x1b6/0x2d0 fs/namei.c:3752 __do_sys_mkdirat fs/namei.c:3763 [inline] __se_sys_mkdirat fs/namei.c:3761 [inline] __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3761 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7ff9f0bf3387 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007ffdfe122df8 EFLAGS: 00000202 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007ffdfe122e80 RCX: 00007ff9f0bf3387 RDX: 00000000000001ff RSI: 00007ffdfe122e80 RDI: 00000000ffffff9c RBP: 00007ffdfe122e5c R08: 0000000000000000 R09: 0000000000000007 R10: 00007ffdfe122b93 R11: 0000000000000202 R12: 0000000000000032 R13: 0000000000144b81 R14: 0000000000000003 R15: 00007ffdfe122ec0 Modules linked in: ---[ end trace 49a4059c0a0aef7e ]--- RIP: 0010:ext4_xattr_set_entry+0x4ad/0x37e0 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 1d 97 ba ff 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 46 2d 00 00 4c 89 f8 48 2b 44 24 18 48 89 RSP: 0018:ffffc90000c773a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90000c777a0 RCX: ffff88811cd4a780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc90000c77638 R08: ffffffff81ec6059 R09: ffffed1029c48479 R10: ffffed1029c48479 R11: 1ffff11029c48478 R12: dffffc0000000000 R13: 1ffff9200018eeee R14: 0000000000000000 R15: 0000000000000000 FS: 00005555555b3400(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5297283000 CR3: 00000001464b0000 CR4: 00000000003506a0 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 1d 97 ba ff callq 0xffba973d 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 46 2d 00 00 jne 0x2d7c 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