BUG: memory leak unreferenced object 0xffff8880188d4800 (size 16): comm "syz-executor.3", pid 8101, jiffies 4295460604 (age 19.909s) hex dump (first 16 bytes): e0 ca 04 45 80 88 ff ff 00 a0 5d 43 80 88 ff ff ...E......]C.... backtrace: [<00000000f6619fc4>] kmalloc include/linux/slab.h:552 [inline] [<00000000f6619fc4>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<000000008ff2f21b>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000356f2c9a>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<00000000841ae420>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<00000000cae63d3c>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<000000005860bcdd>] do_new_mount fs/namespace.c:2881 [inline] [<000000005860bcdd>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<00000000cdf005f6>] do_mount fs/namespace.c:3224 [inline] [<00000000cdf005f6>] __do_sys_mount fs/namespace.c:3432 [inline] [<00000000cdf005f6>] __se_sys_mount fs/namespace.c:3409 [inline] [<00000000cdf005f6>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<0000000025d030ac>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<000000008bdd80e7>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed