EXT4-fs (sda1): Unrecognized mount option "func=MODULE_CHECK" or missing value ================================================================== BUG: KASAN: use-after-free in ext4_xattr_set_entry+0x2e28/0x2f00 fs/ext4/xattr.c:1602 Read of size 4 at addr ffff888192b8b184 by task syz-executor.3/23660 CPU: 0 PID: 23660 Comm: syz-executor.3 Not tainted 4.14.141+ #0 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 print_address_description+0x60/0x226 mm/kasan/report.c:187 __kasan_report.cold+0x1a/0x41 mm/kasan/report.c:316 ext4_xattr_set_entry+0x2e28/0x2f00 fs/ext4/xattr.c:1602 ext4_xattr_ibody_set+0x73/0x280 fs/ext4/xattr.c:2238 ext4_xattr_set_handle+0x508/0xdd0 fs/ext4/xattr.c:2394 ext4_initxattrs+0xb5/0x110 fs/ext4/xattr_security.c:43 security_inode_init_security security/security.c:493 [inline] security_inode_init_security+0x246/0x330 security/security.c:466 __ext4_new_inode+0x336f/0x4850 fs/ext4/ialloc.c:1166 ext4_symlink+0x352/0xa30 fs/ext4/namei.c:3152 vfs_symlink2+0x32a/0x560 fs/namei.c:4292 SYSC_symlinkat fs/namei.c:4325 [inline] SyS_symlinkat+0x116/0x1e0 fs/namei.c:4305 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4595a7 RSP: 002b:00007ffc37b6c1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004595a7 RDX: 00007ffc37b6c287 RSI: 00000000004bf0f0 RDI: 00007ffc37b6c270 RBP: 0000000000000000 R08: 0000000000000800 R09: 0000000000000017 R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000001 R13: 00007ffc37b6c220 R14: 0000000000000000 R15: 00007ffc37b6c230 The buggy address belongs to the page: page:ffffea00064ae2c0 count:0 mapcount:0 mapping: (null) index:0x1 flags: 0x4000000000000000() raw: 4000000000000000 0000000000000000 0000000000000001 00000000ffffffff raw: dead000000000100 dead000000000200 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888192b8b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888192b8b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888192b8b180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888192b8b200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888192b8b280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs (sda1): Unrecognized mount option "func=MODULE_CHECK" or missing value