In next ext4_xattr_set_entry s ffff88811d9b88a4, name len 24 In ext4_xattr_set_entry s ffffc90000bf76a0, last = ffff88810d8e8020, lastdefref 0, name len 16 In ext4_xattr_set_entry s ffff88810c97f700, last = ffff88811d9b85a4, lastdefref 400607, name len 24 In next ext4_xattr_set_entry s ffff88811d9b85a4, name len 24 In ext4_xattr_set_entry s ffffc90000bf7740, last = ffff88810d8ea020, lastdefref 0, name len 16 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+0x983/0x2290 fs/ext4/xattr.c:1584 Code: 03 48 89 84 24 c0 00 00 00 42 80 3c 28 00 4c 8d b4 24 00 01 00 00 74 08 4c 89 ff e8 47 86 ba ff 49 8b 1f 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 dd 15 00 00 8b 0b 44 0f b6 c1 41 83 c0 13 RSP: 0018:ffffc90000bf74a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881019ba780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc90000bf7638 R08: ffffffff81ec6ae8 R09: ffffed10241039a4 R10: ffffed10241039a4 R11: 1ffff110241039a3 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90000bf75a0 R15: ffffc90000bf77a0 FS: 0000555556332400(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556343b78 CR3: 000000010c7d6000 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:2230 ext4_xattr_set_handle+0xc5d/0x15a0 fs/ext4/xattr.c:2387 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: 0033:0x7fb0c9da4387 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:00007ffff766abd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007ffff766ac60 RCX: 00007fb0c9da4387 RDX: 00000000000001ff RSI: 00007ffff766ac60 RDI: 00000000ffffff9c RBP: 00007ffff766ac3c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffff766a977 R11: 0000000000000206 R12: 0000000000000032 R13: 000000000000972a R14: 0000000000000003 R15: 00007ffff766aca0 Modules linked in: ---[ end trace b70b13fcd2842dc1 ]--- RIP: 0010:ext4_xattr_set_entry+0x983/0x2290 fs/ext4/xattr.c:1584 Code: 03 48 89 84 24 c0 00 00 00 42 80 3c 28 00 4c 8d b4 24 00 01 00 00 74 08 4c 89 ff e8 47 86 ba ff 49 8b 1f 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 dd 15 00 00 8b 0b 44 0f b6 c1 41 83 c0 13 RSP: 0018:ffffc90000bf74a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881019ba780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001c RBP: ffffc90000bf7638 R08: ffffffff81ec6ae8 R09: ffffed10241039a4 R10: ffffed10241039a4 R11: 1ffff110241039a3 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90000bf75a0 R15: ffffc90000bf77a0 FS: 0000555556332400(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557e00aa0098 CR3: 000000010c7d6000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 48 89 add -0x77(%rax),%ecx 3: 84 24 c0 test %ah,(%rax,%rax,8) 6: 00 00 add %al,(%rax) 8: 00 42 80 add %al,-0x80(%rdx) b: 3c 28 cmp $0x28,%al d: 00 4c 8d b4 add %cl,-0x4c(%rbp,%rcx,4) 11: 24 00 and $0x0,%al 13: 01 00 add %eax,(%rax) 15: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) 19: 89 ff mov %edi,%edi 1b: e8 47 86 ba ff callq 0xffba8667 20: 49 8b 1f mov (%r15),%rbx 23: 48 89 d8 mov %rbx,%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 dd 15 00 00 jne 0x1613 36: 8b 0b mov (%rbx),%ecx 38: 44 0f b6 c1 movzbl %cl,%r8d 3c: 41 83 c0 13 add $0x13,%r8d