BUG: memory leak unreferenced object 0xffff88800d5c0f00 (size 16): comm "syz-executor.1", pid 18534, jiffies 4296376993 (age 17.654s) hex dump (first 16 bytes): 98 bd d1 41 80 88 ff ff 00 60 19 45 80 88 ff ff ...A.....`.E.... backtrace: [<000000007990b2ca>] kmalloc include/linux/slab.h:552 [inline] [<000000007990b2ca>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<00000000e788a68a>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000040b0025>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<0000000071869d4e>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<00000000e9c0e113>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<0000000046a40988>] do_new_mount fs/namespace.c:2881 [inline] [<0000000046a40988>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<000000000a61b6ca>] do_mount fs/namespace.c:3224 [inline] [<000000000a61b6ca>] __do_sys_mount fs/namespace.c:3432 [inline] [<000000000a61b6ca>] __se_sys_mount fs/namespace.c:3409 [inline] [<000000000a61b6ca>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<000000001460a93e>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<000000008ec47b2a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed