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WARNING: suspicious RCU usage in should_fail (2)

Status: closed as invalid on 2018/02/12 11:24
Subsystems: mm
[Documentation on labels]
First crash: 2542d, last: 2542d
▶ ▼ Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: suspicious RCU usage in should_fail (7) mm 1 2535d 2535d 0/28 closed as invalid on 2018/02/19 12:58
upstream WARNING: suspicious RCU usage in should_fail (4) rds 1 2540d 2540d 0/28 closed as invalid on 2018/02/15 08:58
upstream WARNING: suspicious RCU usage in should_fail (8) net 1 2471d 2471d 0/28 closed as invalid on 2018/04/24 13:49
upstream WARNING: suspicious RCU usage in should_fail rds 8 2542d 2544d 0/28 closed as invalid on 2018/02/12 10:57
upstream WARNING: suspicious RCU usage in should_fail (6) rds 1 2537d 2537d 0/28 closed as invalid on 2018/02/17 12:58
upstream WARNING: suspicious RCU usage in should_fail (3) mm 1 2542d 2542d 0/28 closed as invalid on 2018/02/12 19:58
upstream WARNING: suspicious RCU usage in should_fail (5) mm 1 2537d 2537d 0/28 closed as invalid on 2018/02/17 10:58

Sample crash report:
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium

=============================
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
WARNING: suspicious RCU usage
CPU: 0 PID: 6431 Comm: syz-executor0 Not tainted 4.15.0+ #222
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
4.15.0+ #222 Not tainted
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
-----------------------------
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
./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
1 lock held by syz-executor3/6427:
 #0: 
 (
 should_failslab+0xec/0x120 mm/failslab.c:32
rcu_read_lock
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc mm/slab.c:3365 [inline]
 kmem_cache_alloc+0x47/0x760 mm/slab.c:3539
 __build_skb+0x9d/0x450 net/core/skbuff.c:281
){....}
, at: [<00000000b3cd3611>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218
 build_skb+0x6f/0x2a0 net/core/skbuff.c:312

stack backtrace:
 tun_build_skb.isra.50+0x9cb/0x1850 drivers/net/tun.c:1692
 tun_get_user+0x17d0/0x3940 drivers/net/tun.c:1802
 tun_chr_write_iter+0xbd/0x1c0 drivers/net/tun.c:1988
 call_write_iter include/linux/fs.h:1781 [inline]
 do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653
 do_iter_write+0x154/0x540 fs/read_write.c:932
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453931
RSP: 002b:00007facda0a3ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000000002a RCX: 0000000000453931
RDX: 0000000000000001 RSI: 00007facda0a3bf0 RDI: 0000000000000012
RBP: 000000002037c000 R08: 0000000000000012 R09: 0000000000000000
R10: 000000000000002a R11: 0000000000000293 R12: 0000000000000013
R13: 000000000000060f R14: 00000000006f9208 R15: 0000000000000001
CPU: 1 PID: 6427 Comm: syz-executor3 Not tainted 4.15.0+ #222
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
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
 __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
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
 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:00007f223ce0dc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f223ce0e6d4 RCX: 0000000000453a59
RDX: 0000000000000001 RSI: 00000000200f7000 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000020dfcff0 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: 6427, name: syz-executor3
1 lock held by syz-executor3/6427:
 #0:  (rcu_read_lock){....}, at: [<00000000b3cd3611>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218
CPU: 1 PID: 6427 Comm: syz-executor3 Not tainted 4.15.0+ #222
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:00007f223ce0dc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f223ce0e6d4 RCX: 0000000000453a59
RDX: 0000000000000001 RSI: 00000000200f7000 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000020dfcff0 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000
ipt_CLUSTERIP: Please specify destination IP
nla_parse: 5 callbacks suppressed
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_CLUSTERIP: Please specify destination IP
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
sit: non-ECT from 0.0.0.0 with TOS=0x2
kauditd_printk_skb: 14 callbacks suppressed
audit: type=1400 audit(1518433149.351:36): avc:  denied  { map } for  pid=6681 comm="syz-executor7" path="socket:[17356]" dev="sockfs" ino=17356 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=packet_socket permissive=1
sit: non-ECT from 0.0.0.0 with TOS=0x2
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1400 audit(1518433149.553:37): avc:  denied  { read } for  pid=6710 comm="syz-executor2" path="socket:[17397]" dev="sockfs" ino=17397 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
device lo entered promiscuous mode
audit: type=1400 audit(1518433149.713:38): avc:  denied  { net_broadcast } for  pid=6747 comm="syz-executor0" 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
device lo left promiscuous mode
device lo entered promiscuous mode
device lo left promiscuous mode
audit: type=1400 audit(1518433149.794:39): avc:  denied  { connect } for  pid=6765 comm="syz-executor5" 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
dccp_close: ABORT with 1 bytes unread
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
TCP: request_sock_TCP: Possible SYN flooding on port 20029. Sending cookies.  Check SNMP counters.
xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables

======================================================
WARNING: possible circular locking dependency detected
4.15.0+ #222 Tainted: G        W       
------------------------------------------------------
syz-executor1/7082 is trying to acquire lock:
 (rtnl_mutex){+.+.}, at: [<00000000d89050d8>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74

but task is already holding lock:
 (&xt[i].mutex){+.+.}, at: [<0000000063a4a086>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1046

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&xt[i].mutex){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
       xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1046
       xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1093
       get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989
       do_arpt_get_ctl+0x2a9/0xa00 net/ipv4/netfilter/arp_tables.c:1481
       nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
       nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122
       ip_getsockopt+0x15c/0x220 net/ipv4/ip_sockglue.c:1571
       tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359
       sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934
       SYSC_getsockopt net/socket.c:1880 [inline]
       SyS_getsockopt+0x178/0x340 net/socket.c:1862
       do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x26/0x9b

-> #1 (sk_lock-AF_INET){+.+.}:
       lock_sock_nested+0xc2/0x110 net/core/sock.c:2777
       lock_sock include/net/sock.h:1463 [inline]
       do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646
       ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252
       tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905
       sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
       SYSC_setsockopt net/socket.c:1849 [inline]
       SyS_setsockopt+0x189/0x360 net/socket.c:1828
       do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x26/0x9b

-> #0 (rtnl_mutex){+.+.}:
       lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
       rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
       unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673
       tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123
       cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673
       __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108
       do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline]
       do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686
       nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
       nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
       ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927
       rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060
       sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
       SYSC_setsockopt net/socket.c:1849 [inline]
       SyS_setsockopt+0x189/0x360 net/socket.c:1828
       do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x26/0x9b

other info that might help us debug this:

Chain exists of:
  rtnl_mutex --> sk_lock-AF_INET --> &xt[i].mutex

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&xt[i].mutex);
                               lock(sk_lock-AF_INET);
                               lock(&xt[i].mutex);
  lock(rtnl_mutex);

 *** DEADLOCK ***

1 lock held by syz-executor1/7082:
 #0:  (&xt[i].mutex){+.+.}, at: [<0000000063a4a086>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1046

stack backtrace:
CPU: 1 PID: 7082 Comm: syz-executor1 Tainted: G        W        4.15.0+ #222
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
 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223
 check_prev_add kernel/locking/lockdep.c:1863 [inline]
 check_prevs_add kernel/locking/lockdep.c:1976 [inline]
 validate_chain kernel/locking/lockdep.c:2417 [inline]
 __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431
 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74
 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673
 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123
 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673
 __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108
 do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline]
 do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927
 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060
 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975
 SYSC_setsockopt net/socket.c:1849 [inline]
 SyS_setsockopt+0x189/0x360 net/socket.c:1828
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453a59
RSP: 002b:00007f71372b0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f71372b16d4 RCX: 0000000000453a59
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000016
RBP: 000000000071bea0 R08: 00000000000003c0 R09: 0000000000000000
R10: 0000000020010c40 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004d4 R14: 00000000006f7480 R15: 0000000000000000
netlink: 'syz-executor6': attribute type 21 has an invalid length.
netlink: 'syz-executor6': attribute type 21 has an invalid length.
audit: type=1400 audit(1518433151.877:40): avc:  denied  { getattr } for  pid=7187 comm="syz-executor0" 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
netlink: 'syz-executor7': attribute type 1 has an invalid length.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
x_tables: ip_tables: ah match: only valid for protocol 51
x_tables: ip_tables: ah match: only valid for protocol 51
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 7316 Comm: syz-executor4 Tainted: G        W        4.15.0+ #222
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
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3629
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 sock_write_iter+0x31a/0x5d0 net/socket.c:909
 call_write_iter include/linux/fs.h:1781 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x684/0x970 fs/read_write.c:482
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453a59
RSP: 002b:00007ff9c1d09c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff9c1d0a6d4 RCX: 0000000000453a59
RDX: 000000000000001c RSI: 0000000020df9fe0 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000655 R14: 00000000006f9898 R15: 0000000000000000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 7334 Comm: syz-executor4 Tainted: G        W        4.15.0+ #222
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
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node_trace+0x5a/0x760 mm/slab.c:3648
 __do_kmalloc_node mm/slab.c:3668 [inline]
 __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3683
 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137
 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:983 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1180 [inline]
 netlink_sendmsg+0xa86/0xe60 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 sock_write_iter+0x31a/0x5d0 net/socket.c:909
 call_write_iter include/linux/fs.h:1781 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x684/0x970 fs/read_write.c:482
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453a59
RSP: 002b:00007ff9c1d09c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff9c1d0a6d4 RCX: 0000000000453a59
RDX: 000000000000001c RSI: 0000000020df9fe0 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000655 R14: 00000000006f9898 R15: 0000000000000001
sctp: [Deprecated]: syz-executor6 (pid 7374) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 7381 Comm: syz-executor4 Tainted: G        W        4.15.0+ #222
sctp: [Deprecated]: syz-executor6 (pid 7386) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
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
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slab.c:3286 [inline]
 kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3629
 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193
netlink: 'syz-executor1': attribute type 3 has an invalid length.
 alloc_skb include/linux/skbuff.h:983 [inline]
 nlmsg_new include/net/netlink.h:511 [inline]
 netlink_ack+0x283/0xa10 net/netlink/af_netlink.c:2376
 netlink_rcv_skb+0x2b4/0x380 net/netlink/af_netlink.c:2448
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=8622 sclass=netlink_route_socket pig=7420 comm=syz-executor1
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635
 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline]
 netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897
netlink: 'syz-executor1': attribute type 3 has an invalid length.
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:640
 sock_write_iter+0x31a/0x5d0 net/socket.c:909
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=8622 sclass=netlink_route_socket pig=7437 comm=syz-executor1
 call_write_iter include/linux/fs.h:1781 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x684/0x970 fs/read_write.c:482
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453a59
RSP: 002b:00007ff9c1d09c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff9c1d0a6d4 RCX: 0000000000453a59
RDX: 000000000000001c RSI: 0000000020df9fe0 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000655 R14: 00000000006f9898 R15: 0000000000000002
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1400 audit(1518433153.458:41): avc:  denied  { map } for  pid=7452 comm="syz-executor7" path="socket:[18289]" dev="sockfs" ino=18289 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=tcp_socket permissive=1
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
ipt_REJECT: TCP_RESET invalid for non-tcp
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
IPv4: Oversized IP packet from 172.20.3.13
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
bpf: check failed: parse error
ipt_REJECT: TCP_RESET invalid for non-tcp
bpf: check failed: parse error
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
audit: type=1400 audit(1518433154.427:42): avc:  denied  { map } for  pid=7798 comm="syz-executor5" path="socket:[19719]" dev="sockfs" ino=19719 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=socket permissive=1
ipt_REJECT: TCP_RESET invalid for non-tcp
netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
xt_CT: You must specify a L4 protocol, and not use inversions on it.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
xt_CT: You must specify a L4 protocol, and not use inversions on it.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 'syz-executor7': attribute type 21 has an invalid length.
netlink: 'syz-executor7': attribute type 21 has an invalid length.
IPv6: Can't replace route, no match found
xt_socket: unknown flags 0xa4
IPv6: Can't replace route, no match found
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
xt_socket: unknown flags 0xa4
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
sctp: [Deprecated]: syz-executor0 (pid 8142) Use of int in max_burst socket option.
Use struct sctp_assoc_value instead
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
sctp: [Deprecated]: syz-executor0 (pid 8160) Use of int in max_burst socket option.
Use struct sctp_assoc_value instead
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_CLUSTERIP: unknown mode 3
ipt_CLUSTERIP: unknown mode 3
xt_connbytes: Forcing CT accounting to be enabled
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_CLUSTERIP: unknown mode 3
ipt_REJECT: TCP_RESET invalid for non-tcp
audit: type=1400 audit(1518433155.710:43): avc:  denied  { connect } for  pid=8281 comm="syz-executor4" 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
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
ipt_REJECT: TCP_RESET invalid for non-tcp
CPU: 1 PID: 8342 Comm: syz-executor6 Tainted: G        W        4.15.0+ #222
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
ipt_REJECT: TCP_RESET invalid for non-tcp
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
 should_fail_alloc_page mm/page_alloc.c:2955 [inline]
 prepare_alloc_pages mm/page_alloc.c:4194 [inline]
 __alloc_pages_nodemask+0x327/0xdd0 mm/page_alloc.c:4233
 alloc_pages_current+0xb6/0x1e0 mm/mempolicy.c:2055
 alloc_pages include/linux/gfp.h:492 [inline]
 skb_page_frag_refill+0x358/0x5f0 net/core/sock.c:2208
 tun_build_skb.isra.50+0x2f0/0x1850 drivers/net/tun.c:1631
 tun_get_user+0x17d0/0x3940 drivers/net/tun.c:1802
 tun_chr_write_iter+0xbd/0x1c0 drivers/net/tun.c:1988
 call_write_iter include/linux/fs.h:1781 [inline]
 do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653
 do_iter_write+0x154/0x540 fs/read_write.c:932
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x453931
RSP: 002b:00007f8d9ce19ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000000002a RCX: 0000000000453931
RDX: 0000000000000001 RSI: 00007f8d9ce19bf0 RDI: 0000000000000012
RBP: 000000002025a000 R08: 0000000000000012 R09: 0000000000000000
R10: 000000000000002a R11: 0000000000000293 R12: 0000000000000013
R13: 000000000000060f R14: 00000000006f9208 R15: 0000000000000000
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
ipt_REJECT: TCP_RESET invalid for non-tcp
ipt_REJECT: TCP_RESET invalid for non-tcp
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/12 10:59 net-next-old 9a61df9e5f74 88bc17df .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.