BUG: memory leak unreferenced object 0xffff88800d016540 (size 16): comm "syz-executor.6", pid 8084, jiffies 4295519408 (age 25.915s) hex dump (first 16 bytes): f8 d9 7a 20 80 88 ff ff 00 80 cd 43 80 88 ff ff ..z .......C.... backtrace: [<000000004bb1c8ec>] kmalloc include/linux/slab.h:552 [inline] [<000000004bb1c8ec>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<000000001491fb01>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000a2820c9d>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<000000000856d7b2>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<0000000050a9b552>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<0000000042081870>] do_new_mount fs/namespace.c:2881 [inline] [<0000000042081870>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<0000000005f30158>] do_mount fs/namespace.c:3224 [inline] [<0000000005f30158>] __do_sys_mount fs/namespace.c:3432 [inline] [<0000000005f30158>] __se_sys_mount fs/namespace.c:3409 [inline] [<0000000005f30158>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<0000000065fb1bd0>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000d9291a11>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed