BUG: memory leak unreferenced object 0xffff888044bd6120 (size 16): comm "syz-executor.0", pid 12568, jiffies 4296390872 (age 21.409s) hex dump (first 16 bytes): 80 5e 89 45 80 88 ff ff 00 c0 b8 4b 80 88 ff ff .^.E.......K.... backtrace: [<00000000245130e4>] kmalloc include/linux/slab.h:552 [inline] [<00000000245130e4>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<00000000e2dc1110>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000cdc8b76c>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<000000002c328422>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<00000000655d5e55>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<00000000a9ecbbed>] do_new_mount fs/namespace.c:2881 [inline] [<00000000a9ecbbed>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<00000000950075a2>] do_mount fs/namespace.c:3224 [inline] [<00000000950075a2>] __do_sys_mount fs/namespace.c:3432 [inline] [<00000000950075a2>] __se_sys_mount fs/namespace.c:3409 [inline] [<00000000950075a2>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<000000005daca984>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000ebd71eca>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed