================================================ WARNING: lock held when returning to user space! 5.6.0-rc3-syzkaller #0 Not tainted ------------------------------------------------ syz-executor331/8718 is leaving the kernel with locks still held! 1 lock held by syz-executor331/8718: #0: ffff888214550428 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2903 [inline] #0: ffff888214550428 (sb_writers#3){.+.+}, at: ovl_write_iter+0x3c1/0x10d0 fs/overlayfs/file.c:348