audit: type=1400 audit(1518299748.550:15): avc: denied { dac_override } for pid=5275 comm="syz-executor1" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 netlink: 'syz-executor7': attribute type 25 has an invalid length. ============================= WARNING: suspicious RCU usage 4.15.0+ #307 Not tainted ----------------------------- ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 audit: type=1400 audit(1518299748.581:16): avc: denied { net_raw } for pid=5274 comm="syz-executor3" capability=13 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 1 lock held by syz-executor2/5282: #0: (rcu_read_lock){....}, at: [<0000000010116224>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 stack backtrace: CPU: 0 PID: 5282 Comm: syz-executor2 Not tainted 4.15.0+ #307 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4592 rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline] ___might_sleep+0x385/0x470 kernel/sched/core.c:6093 audit: type=1400 audit(1518299748.708:17): avc: denied { net_broadcast } for pid=5272 comm="syz-executor7" capability=11 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 __might_sleep+0x95/0x190 kernel/sched/core.c:6081 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453a59 RSP: 002b:00007f1c434abc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f1c434ac6d4 RCX: 0000000000453a59 RDX: 0000000000000000 RSI: 0000000020c15000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020062000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 5282, name: syz-executor2 netlink: 'syz-executor7': attribute type 25 has an invalid length. 1 lock held by syz-executor2/5282: #0: (rcu_read_lock){....}, at: [<0000000010116224>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 CPU: 0 PID: 5282 Comm: syz-executor2 Not tainted 4.15.0+ #307 audit: type=1400 audit(1518299749.110:18): avc: denied { net_bind_service } for pid=1233 comm="xprtiod" capability=10 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=cap_userns permissive=1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128 __might_sleep+0x95/0x190 kernel/sched/core.c:6081 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453a59 RSP: 002b:00007f1c434abc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f1c434ac6d4 RCX: 0000000000453a59 RDX: 0000000000000000 RSI: 0000000020c15000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020062000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 audit: type=1400 audit(1518299749.540:19): avc: denied { dac_read_search } for pid=4226 comm="syz-executor0" capability=2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 syz-executor0 (5332) used greatest stack depth: 16576 bytes left audit: type=1400 audit(1518299749.637:20): avc: denied { map_create } for pid=5335 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 audit: type=1400 audit(1518299749.663:21): avc: denied { map_read map_write } for pid=5335 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 syz-executor0 (5342) used greatest stack depth: 11968 bytes left audit: type=1400 audit(1518299749.682:22): avc: denied { create } for pid=5343 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 xt_HMARK: proto mask must be zero with L3 mode audit: type=1400 audit(1518299749.809:23): avc: denied { setuid } for pid=5362 comm="syz-executor2" capability=7 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 xt_HMARK: proto mask must be zero with L3 mode audit: type=1400 audit(1518299749.926:25): avc: denied { relabelto } for pid=5390 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1518299749.926:24): avc: denied { create } for pid=5388 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1518299749.926:26): avc: denied { send } for pid=5390 comm="syz-executor3" saddr=fe80::a8aa:aaff:feaa:3aa daddr=ff01::1 netif=gretap0 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1518299749.926:27): avc: denied { send } for pid=5390 comm="syz-executor3" saddr=fe80::a8aa:aaff:feaa:3aa daddr=ff01::1 netif=gretap0 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 device eql entered promiscuous mode syz-executor3 uses obsolete (PF_INET,SOCK_PACKET) device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor1 (5713) triggered the difference, watch for misbehavior. binder_alloc: binder_alloc_mmap_handler: 5697 2000c000-2000e000 already mapped failed -16 dccp_close: ABORT with 1 bytes unread kauditd_printk_skb: 1497 callbacks suppressed audit: type=1400 audit(1518299754.113:1525): avc: denied { net_admin } for pid=4226 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.114:1526): avc: denied { net_admin } for pid=4221 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.115:1527): avc: denied { net_admin } for pid=4221 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 capability: warning: `syz-executor5' uses 32-bit capabilities (legacy support in use) audit: type=1400 audit(1518299754.119:1528): avc: denied { net_admin } for pid=4223 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.120:1529): avc: denied { net_admin } for pid=4231 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.122:1530): avc: denied { net_admin } for pid=4231 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.124:1531): avc: denied { net_admin } for pid=4223 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.130:1532): avc: denied { net_admin } for pid=4221 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.132:1533): avc: denied { net_admin } for pid=4223 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1518299754.136:1534): avc: denied { net_admin } for pid=4221 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1