BUG: memory leak unreferenced object 0xffff88801582f7a0 (size 16): comm "syz-executor.3", pid 20263, jiffies 4297388419 (age 16.530s) hex dump (first 16 bytes): 28 08 05 45 80 88 ff ff 00 80 0f 0f 80 88 ff ff (..E............ backtrace: [<000000001b8d22c5>] kmalloc include/linux/slab.h:552 [inline] [<000000001b8d22c5>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<000000009848e0c8>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000102abc93>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<0000000056491e05>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<00000000e1c03c1a>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<00000000a182d04e>] do_new_mount fs/namespace.c:2881 [inline] [<00000000a182d04e>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<00000000243ad9a3>] do_mount fs/namespace.c:3224 [inline] [<00000000243ad9a3>] __do_sys_mount fs/namespace.c:3432 [inline] [<00000000243ad9a3>] __se_sys_mount fs/namespace.c:3409 [inline] [<00000000243ad9a3>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<000000008ad86450>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<000000007691e5af>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed