IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready audit: type=1400 audit(1582023880.119:41): avc: denied { associate } for pid=8240 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 ===================================== WARNING: bad unlock balance detected! 4.19.104-syzkaller #0 Not tainted ------------------------------------- syz-executor.0/8705 is trying to release lock (&file->mut) at: [] ucma_destroy_id+0x24c/0x4a0 drivers/infiniband/core/ucma.c:628 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor.0/8705: #0: 0000000041874434 (&file->mut){+.+.}, at: ucma_destroy_id+0x1e9/0x4a0 drivers/infiniband/core/ucma.c:626 stack backtrace: CPU: 1 PID: 8705 Comm: syz-executor.0 Not tainted 4.19.104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_unlock_imbalance_bug kernel/locking/lockdep.c:3464 [inline] print_unlock_imbalance_bug.cold+0x114/0x123 kernel/locking/lockdep.c:3441 __lock_release kernel/locking/lockdep.c:3674 [inline] lock_release+0x6cd/0xa30 kernel/locking/lockdep.c:3922 __mutex_unlock_slowpath+0x8e/0x6b0 kernel/locking/mutex.c:1197 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:713 ucma_destroy_id+0x24c/0x4a0 drivers/infiniband/core/ucma.c:628 ucma_write+0x2d7/0x3c0 drivers/infiniband/core/ucma.c:1689 __vfs_write+0x114/0x810 fs/read_write.c:485 vfs_write+0x20c/0x560 fs/read_write.c:549 ksys_write+0x14f/0x2d0 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:608 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c6b9 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbc1e9a9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbc1e9aa6d4 RCX: 000000000045c6b9 RDX: 0000000000000018 RSI: 0000000020001380 RDI: 0000000000000003 RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000c8a R14: 00000000004d78f0 R15: 000000000076bfcc