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WARNING: suspicious RCU usage in should_fail (6)

Status: closed as invalid on 2018/02/17 12:58
Subsystems: rds
[Documentation on labels]
First crash: 2537d, last: 2537d
▶ ▼ 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 (2) mm 1 2542d 2542d 0/28 closed as invalid on 2018/02/12 11:24
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 (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:
=============================
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
WARNING: suspicious RCU usage
4.16.0-rc1+ #316 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
CPU: 1 PID: 5830 Comm: syz-executor3 Not tainted 4.16.0-rc1+ #316
1 lock held by syz-executor1/5832:
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
 #0: 
 (
rcu_read_lock
){....}
 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
, at: [<000000009106dd44>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218

stack backtrace:
 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+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453931
RSP: 002b:00007f58c1e25ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000000006e RCX: 0000000000453931
RDX: 0000000000000001 RSI: 00007f58c1e25bf0 RDI: 0000000000000012
RBP: 00000000207f7000 R08: 0000000000000012 R09: 0000000000000000
R10: 000000000000006e R11: 0000000000000293 R12: 0000000000000013
R13: 000000000000060f R14: 00000000006f9208 R15: 0000000000000000
CPU: 0 PID: 5832 Comm: syz-executor1 Not tainted 4.16.0-rc1+ #316
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:6098
 __might_sleep+0x95/0x190 kernel/sched/core.c:6086
 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+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453a59
RSP: 002b:00007f06e7779c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f06e777a6d4 RCX: 0000000000453a59
RDX: 00000000000001c1 RSI: 0000000020dbf000 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000020b2d000 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: 5832, name: syz-executor1
1 lock held by syz-executor1/5832:
 #0:  (rcu_read_lock){....}, at: [<000000009106dd44>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218
CPU: 0 PID: 5832 Comm: syz-executor1 Not tainted 4.16.0-rc1+ #316
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:6133
 __might_sleep+0x95/0x190 kernel/sched/core.c:6086
 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+0x280/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x453a59
RSP: 002b:00007f06e7779c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f06e777a6d4 RCX: 0000000000453a59
RDX: 00000000000001c1 RSI: 0000000020dbf000 RDI: 0000000000000013
RBP: 000000000071bea0 R08: 0000000020b2d000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000
xt_connbytes: Forcing CT accounting to be enabled
netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 'syz-executor5': attribute type 20 has an invalid length.
netlink: 'syz-executor5': attribute type 20 has an invalid length.
kauditd_printk_skb: 12 callbacks suppressed
audit: type=1400 audit(1518870322.770:42): avc:  denied  { setgid } for  pid=6273 comm="syz-executor3" capability=6  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(1518870324.050:43): avc:  denied  { setuid } for  pid=6331 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
binder: 6357 RLIMIT_NICE not set
audit: type=1400 audit(1518870324.116:44): avc:  denied  { set_context_mgr } for  pid=6352 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=binder permissive=1
binder: 6352:6357 Acquire 1 refcount change on invalid ref 0 ret -22
binder: 6352:6370 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: 6352:6373 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 6373 RLIMIT_NICE not set
binder: undelivered death notification, 0000000000000000
xt_connbytes: Forcing CT accounting to be enabled
audit: type=1400 audit(1518870324.824:45): avc:  denied  { ioctl } for  pid=6490 comm="syz-executor7" path="socket:[18703]" dev="sockfs" ino=18703 ioctlcmd=0x89a1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=sock_file permissive=1
xt_cluster: you have exceeded the maximum number of cluster nodes (1024 > 32)
xt_cluster: you have exceeded the maximum number of cluster nodes (1024 > 32)
ipt_CLUSTERIP: Please specify destination IP
NFQUEUE: number of total queues is 0
device eql entered promiscuous mode
NFQUEUE: number of total queues is 0
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=6759 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=6773 comm=syz-executor2
syz-executor5 (6789): /proc/6785/oom_adj is deprecated, please use /proc/6785/oom_score_adj instead.
audit: type=1400 audit(1518870326.450:46): avc:  denied  { map } for  pid=6815 comm="syz-executor2" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=19061 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1
mmap: syz-executor7 (6826) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt.
raw_sendmsg: syz-executor1 forgot to set AF_INET. Fix it!
audit: type=1400 audit(1518870326.712:47): avc:  denied  { create } for  pid=6883 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=netlink_scsitransport_socket permissive=1
audit: type=1400 audit(1518870327.150:48): avc:  denied  { map } for  pid=6988 comm="syz-executor2" path="/dev/ashmem" dev="devtmpfs" ino=9046 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1
audit: type=1326 audit(1518870327.298:49): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7007 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0
audit: type=1326 audit(1518870327.422:50): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7033 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0
dccp_v4_rcv: dropped packet with invalid checksum
netlink: 20 bytes leftover after parsing attributes in process `syz-executor4'.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor4'.
device gre0 entered promiscuous mode
device gre0 left promiscuous mode
device gre0 entered promiscuous mode
device gre0 left promiscuous mode
ip6t_REJECT: ECHOREPLY is not supported.
ip6t_REJECT: ECHOREPLY is not supported.
device eql entered promiscuous mode
Cannot find add_set index 3 as target
capability: warning: `syz-executor7' uses deprecated v2 capabilities in a way that may be insecure
Cannot find add_set index 3 as target
Dead loop on virtual device ip6_vti0, fix it urgently!
openvswitch: netlink: Either Ethernet header or EtherType is required.
Dead loop on virtual device ip6_vti0, fix it urgently!
openvswitch: netlink: Either Ethernet header or EtherType is required.
netlink: 'syz-executor7': attribute type 1 has an invalid length.
netlink: 'syz-executor7': attribute type 1 has an invalid length.

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/17 12:25 upstream 1e3510b2b053 c8b3f7c1 .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.