In ext4_xattr_set_entry s ffff88810cefc100, last = ffff88811da795a4
In ext4_xattr_set_entry s ffffc90000b57740, last = ffff88810d870020
In ext4_xattr_set_entry s ffffc90000b577a0, last = 0
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: 405 Comm: syz-executor.0 Not tainted 5.10.144-syzkaller-987214-g7474313da8d6-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2022
RIP: 0010:ext4_xattr_set_entry+0x858/0x22a0 fs/ext4/xattr.c:1588
Code: e6 31 c0 e8 e7 cb a5 02 48 89 9c 24 b8 00 00 00 42 80 3c 2b 00 74 08 4c 89 e7 e8 73 87 ba ff 4d 8b 24 24 4c 89 e0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 35 17 00 00 4c 2b b4 24 a0 00 00 00 4c 89
RSP: 0018:ffffc90000b574a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff9200016aef4 RCX: 3d2ea00db2221f00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000b57638 R08: ffffffff8153d3e8 R09: ffffed103ee6a5e8
R10: ffffed103ee6a5e8 R11: 1ffff1103ee6a5e7 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90000b57768
FS:  0000555556b76400(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556b87b78 CR3: 0000000101fef000 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:2229
 ext4_xattr_set_handle+0xc5d/0x15a0 fs/ext4/xattr.c:2386
 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: 0033:0x7f7504a27387
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:00007ffc21ad2558 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ffc21ad25e0 RCX: 00007f7504a27387
RDX: 00000000000001ff RSI: 00007ffc21ad25e0 RDI: 00000000ffffff9c
RBP: 00007ffc21ad25bc R08: 0000000000000000 R09: 0000000000000003
R10: 00007ffc21ad22f7 R11: 0000000000000202 R12: 0000000000000032
R13: 000000000000901e R14: 0000000000000003 R15: 00007ffc21ad2620
Modules linked in:
---[ end trace 8b9764118d25f940 ]---
RIP: 0010:ext4_xattr_set_entry+0x858/0x22a0 fs/ext4/xattr.c:1588
Code: e6 31 c0 e8 e7 cb a5 02 48 89 9c 24 b8 00 00 00 42 80 3c 2b 00 74 08 4c 89 e7 e8 73 87 ba ff 4d 8b 24 24 4c 89 e0 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 35 17 00 00 4c 2b b4 24 a0 00 00 00 4c 89
RSP: 0018:ffffc90000b574a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff9200016aef4 RCX: 3d2ea00db2221f00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000b57638 R08: ffffffff8153d3e8 R09: ffffed103ee6a5e8
R10: ffffed103ee6a5e8 R11: 1ffff1103ee6a5e7 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc90000b57768
FS:  0000555556b76400(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556b87b78 CR3: 0000000101fef000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e6 31                	out    %al,$0x31
   2:	c0 e8 e7             	shr    $0xe7,%al
   5:	cb                   	lret
   6:	a5                   	movsl  %ds:(%rsi),%es:(%rdi)
   7:	02 48 89             	add    -0x77(%rax),%cl
   a:	9c                   	pushfq
   b:	24 b8                	and    $0xb8,%al
   d:	00 00                	add    %al,(%rax)
   f:	00 42 80             	add    %al,-0x80(%rdx)
  12:	3c 2b                	cmp    $0x2b,%al
  14:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
  18:	89 e7                	mov    %esp,%edi
  1a:	e8 73 87 ba ff       	callq  0xffba8792
  1f:	4d 8b 24 24          	mov    (%r12),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 8a 04 28          	mov    (%rax,%r13,1),%al <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 35 17 00 00    	jne    0x176b
  36:	4c 2b b4 24 a0 00 00 	sub    0xa0(%rsp),%r14
  3d:	00
  3e:	4c                   	rex.WR
  3f:	89                   	.byte 0x89