================================================ [ BUG: lock held when returning to user space! ] 4.9.124+ #33 Not tainted ------------------------------------------------ syz-executor4/7119 is leaving the kernel with locks still held! 1 lock held by syz-executor4/7119: #0: (&fi->mutex){+.+.+.}, at: [] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362 netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. EXT4-fs (sda1): Cannot change data mode on remount netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. EXT4-fs: Invalid sb specification: sb=0x0000000000000000,errors=continue EXT4-fs (loop2): VFS: Can't find ext4 filesystem EXT4-fs: Invalid sb specification: sb=0x0000000000000000,errors=continue EXT4-fs (loop2): VFS: Can't find ext4 filesystem selinux_nlmsg_perm: 356 callbacks suppressed SELinux: unrecognized netlink message: protocol=4 nlmsg_type=44282 sclass=netlink_tcpdiag_socket pig=7462 comm=syz-executor7 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=44282 sclass=netlink_tcpdiag_socket pig=7491 comm=syz-executor7 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 FAT-fs (loop2): invalid media value (0x5c) FAT-fs (loop2): Can't find a valid FAT filesystem hid-generic 0000:928A:0000.0002: unknown main item tag 0x0 hid-generic 0000:928A:0000.0002: hidraw0: HID v0.00 Device [syz1] on syz1 FAT-fs (loop2): invalid media value (0x5c) FAT-fs (loop2): Can't find a valid FAT filesystem tty_warn_deprecated_flags: 'syz-executor1' is using deprecated serial flags (with no effect): 00000400 tty_warn_deprecated_flags: 'syz-executor1' is using deprecated serial flags (with no effect): 00000400 TCP: request_sock_TCP: Possible SYN flooding on port 20002. Dropping request. Check SNMP counters. EXT4-fs (sda1): re-mounted. Opts: EXT4-fs (sda1): Unrecognized mount option "/selinux/mls" or missing value