BUG: memory leak unreferenced object 0xffff8880221bbfe0 (size 16): comm "syz-executor.7", pid 24549, jiffies 4296081298 (age 19.369s) hex dump (first 16 bytes): b0 8c ba 4d 80 88 ff ff 00 a0 7a 5f 80 88 ff ff ...M......z_.... backtrace: [<000000008392ff1e>] kmalloc include/linux/slab.h:552 [inline] [<000000008392ff1e>] ext4_multi_mount_protect+0x861/0xb20 fs/ext4/mmp.c:367 [<00000000b402796e>] ext4_fill_super+0xa20e/0xcf20 fs/ext4/super.c:4774 [<00000000fe919ee2>] mount_bdev+0x331/0x3f0 fs/super.c:1419 [<00000000d7755eb5>] legacy_get_tree+0x105/0x220 fs/fs_context.c:592 [<0000000011558eec>] vfs_get_tree+0x8e/0x2f0 fs/super.c:1549 [<0000000050c51f71>] do_new_mount fs/namespace.c:2881 [inline] [<0000000050c51f71>] path_mount+0x139a/0x2080 fs/namespace.c:3211 [<000000004ed5cb3c>] do_mount fs/namespace.c:3224 [inline] [<000000004ed5cb3c>] __do_sys_mount fs/namespace.c:3432 [inline] [<000000004ed5cb3c>] __se_sys_mount fs/namespace.c:3409 [inline] [<000000004ed5cb3c>] __x64_sys_mount+0x27e/0x300 fs/namespace.c:3409 [<00000000e9004f92>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<00000000b2a077c6>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: leak checking failed