BUG: memory leak unreferenced object 0xffff8880366c00e0 (size 16): comm "syz-executor.2", pid 12561, jiffies 4295928897 (age 17.484s) hex dump (first 16 bytes): d0 d1 0d 44 80 88 ff ff 00 80 6c 3f 80 88 ff ff ...D......l?.... backtrace: [<000000002c0252f4>] kmalloc include/linux/slab.h:552 [inline] [<000000002c0252f4>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<00000000bba3af63>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<000000003ea7ca30>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<00000000a5e6cd8a>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<000000000a2d5712>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<00000000754f5705>] do_new_mount fs/namespace.c:2881 [inline] [<00000000754f5705>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<0000000098ffbcef>] do_mount fs/namespace.c:3224 [inline] [<0000000098ffbcef>] __do_sys_mount fs/namespace.c:3432 [inline] [<0000000098ffbcef>] __se_sys_mount fs/namespace.c:3409 [inline] [<0000000098ffbcef>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<000000007b442037>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000d4885bf0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed