BUG: memory leak unreferenced object 0xffff88804d337820 (size 16): comm "syz-executor.4", pid 7410, jiffies 4297871558 (age 19.285s) hex dump (first 16 bytes): d0 51 06 4e 80 88 ff ff 00 60 62 64 80 88 ff ff .Q.N.....`bd.... backtrace: [<00000000afc5fa1a>] kmalloc include/linux/slab.h:552 [inline] [<00000000afc5fa1a>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<0000000051eb8980>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<000000003c08d801>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<00000000de149e9f>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<00000000e5324afb>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<0000000035002875>] do_new_mount fs/namespace.c:2881 [inline] [<0000000035002875>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<00000000b9681d64>] do_mount fs/namespace.c:3224 [inline] [<00000000b9681d64>] __do_sys_mount fs/namespace.c:3432 [inline] [<00000000b9681d64>] __se_sys_mount fs/namespace.c:3409 [inline] [<00000000b9681d64>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<00000000dce6961c>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000bd499a5f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed