BUG: memory leak unreferenced object 0xffff8880158e9920 (size 16): comm "syz-executor.3", pid 6561, jiffies 4295170223 (age 16.453s) hex dump (first 16 bytes): 58 66 d9 48 80 88 ff ff 00 00 19 16 80 88 ff ff Xf.H............ backtrace: [<00000000e63211d3>] kmalloc include/linux/slab.h:552 [inline] [<00000000e63211d3>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<0000000042ca10a3>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000bbe6c113>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<0000000077f80c43>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<000000007ae64508>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<00000000ae300e0c>] do_new_mount fs/namespace.c:2881 [inline] [<00000000ae300e0c>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<000000002c194c4e>] do_mount fs/namespace.c:3224 [inline] [<000000002c194c4e>] __do_sys_mount fs/namespace.c:3432 [inline] [<000000002c194c4e>] __se_sys_mount fs/namespace.c:3409 [inline] [<000000002c194c4e>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<00000000ec083137>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000ba634bbe>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed