===================================== [ BUG: bad unlock balance detected! ] 4.9.68-gfb66dc2 #107 Not tainted ------------------------------------- syz-executor7/9089 is trying to release lock (mrt_lock[ 50.013049] device gre0 entered promiscuous mode ) at: but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor7/9089: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0x9f/0xc0 fs/file.c:781 #1: (&p->lock){+.+.+.}, at: [] seq_read+0xdd/0x1290 fs/seq_file.c:178 stack backtrace: CPU: 0 PID: 9089 Comm: syz-executor7 Not tainted 4.9.68-gfb66dc2 #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801a54d78e8 ffffffff81d90889 ffffffff849ae9f8 ffff8801aa49b000 ffffffff834dfc54 ffffffff849ae9f8 ffff8801aa49b888 ffff8801a54d7918 ffffffff812353f4 dffffc0000000000 ffffffff849ae9f8 00000000ffffffff Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3398 [] __lock_release kernel/locking/lockdep.c:3540 [inline] [] lock_release+0x6f8/0xb80 kernel/locking/lockdep.c:3775 [] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] [] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255 [] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553 [] seq_read+0xa83/0x1290 fs/seq_file.c:283 [] proc_reg_read+0xef/0x170 fs/proc/inode.c:202 [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_readv+0xe6/0x250 fs/read_write.c:924 [] SYSC_readv fs/read_write.c:1011 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1008 [] entry_SYSCALL_64_fastpath+0x23/0xc6 device gre0 entered promiscuous mode device gre0 entered promiscuous mode program syz-executor7 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 program syz-executor7 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 program syz-executor7 is using a deprecated SCSI ioctl, please convert it to SG_IO device gre0 entered promiscuous mode sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 program syz-executor7 is using a deprecated SCSI ioctl, please convert it to SG_IO device gre0 entered promiscuous mode sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 nla_parse: 9 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'. keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range keychord: keycode 25638 out of range