rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12436/1:b..l P12842/1:b..l
(detected by 0, t=10502 jiffies, g=320945, q=778)
task:syz-executor.3 state:R running task stack:23464 pid:12842 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6668
irqentry_exit+0x31/0x80 kernel/entry/common.c:425
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__kasan_check_read+0x4/0x10 mm/kasan/shadow.c:31
Code: 43 07 48 85 db 0f 85 eb 50 45 07 48 83 c4 60 5b 5d 41 5c 41 5d c3 c3 e9 eb 51 45 07 cc cc cc cc cc cc cc cc cc cc 48 8b 0c 24 <89> f6 31 d2 e9 f3 f9 ff ff 0f 1f 00 48 8b 0c 24 89 f6 ba 01 00 00
RSP: 0018:ffffc900032078c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815bdc31
RDX: 1ffffd1ffff88a10 RSI: 0000000000000008 RDI: ffffffff8d911b90
RBP: 1ffff92000640f1b R08: 0000000000000000 R09: ffffffff8d911b97
R10: fffffbfff1b22372 R11: 0000000000000000 R12: ffffffff8bb812a0
R13: 0000000000000001 R14: 0000000000000400 R15: 00000000000000c0
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0xa1/0x720 kernel/locking/lockdep.c:5648
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:721 [inline]
percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline]
percpu_ref_tryget include/linux/percpu-refcount.h:266 [inline]
obj_cgroup_tryget include/linux/memcontrol.h:820 [inline]
get_obj_cgroup_from_current+0x1c2/0x530 mm/memcontrol.c:2918
memcg_slab_pre_alloc_hook mm/slab.h:283 [inline]
slab_pre_alloc_hook mm/slab.h:497 [inline]
slab_alloc mm/slab.c:3306 [inline]
kmem_cache_alloc+0x82/0x560 mm/slab.c:3507
anon_vma_alloc mm/rmap.c:90 [inline]
anon_vma_fork+0xed/0x630 mm/rmap.c:355
dup_mmap kernel/fork.c:568 [inline]
dup_mm+0xa07/0x13e0 kernel/fork.c:1450
copy_mm kernel/fork.c:1502 [inline]
copy_process+0x6fed/0x75a0 kernel/fork.c:2191
kernel_clone+0xe7/0xab0 kernel/fork.c:2582
__do_sys_clone+0xc8/0x110 kernel/fork.c:2699
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f041e61848b
RSP: 002b:00007fffd88bd2c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f041e61848b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 00005555564b6400
R10: 00005555564b66d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffd88bd3a0
task:syz-executor.5 state:R running task stack:24152 pid:12436 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6668
irqentry_exit+0x31/0x80 kernel/entry/common.c:425
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:avc_search_node security/selinux/avc.c:537 [inline]
RIP: 0010:avc_lookup+0xe0/0x1c0 security/selinux/avc.c:567
Code: 49 83 ec 28 0f 84 bd 00 00 00 e8 bb 0f d8 fd 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e b2 00 00 00 45 8b 3c 24 <89> ef 44 89 fe e8 96 12 d8 fd 44 39 fd 75 99 e8 8c 0f d8 fd 49 8d
RSP: 0018:ffffc90004e9f930 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8880774c4100 RSI: ffffffff839eb845 RDI: ffffffff906436f8
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff839f1c6d R11: 0000000000000000 R12: ffff88801c355e38
R13: 0000000000000005 R14: 0000000000000086 R15: 0000000000000086
avc_has_perm_noaudit+0x12d/0x390 security/selinux/avc.c:1152
cred_has_capability.isra.0+0x136/0x2b0 security/selinux/hooks.c:1660
security_capable+0x5c/0xc0 security/security.c:806
ns_capable_common kernel/capability.c:375 [inline]
ns_capable+0x6f/0x100 kernel/capability.c:396
do_ip6t_get_ctl+0xe0/0xa10 net/ipv6/netfilter/ip6_tables.c:1658
nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116
ipv6_getsockopt+0x1be/0x270 net/ipv6/ipv6_sockglue.c:1495
tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:4251
__sys_getsockopt+0x21f/0x5f0 net/socket.c:2220
__do_sys_getsockopt net/socket.c:2235 [inline]
__se_sys_getsockopt net/socket.c:2232 [inline]
__x64_sys_getsockopt+0xba/0x150 net/socket.c:2232
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f80a74394ba
RSP: 002b:00007fff8c3280c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f80a74394ba
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007fff8c3280f0 R08: 00007fff8c3280ec R09: ffffff0000000000
R10: 00007fff8c3280f0 R11: 0000000000000246 R12: 00007fff8c328150
R13: 0000000000000003 R14: 00007fff8c3280ec R15: 00007f80a751a660
----------------
Code disassembly (best guess):
0: 43 07 rex.XB (bad)
2: 48 85 db test %rbx,%rbx
5: 0f 85 eb 50 45 07 jne 0x74550f6
b: 48 83 c4 60 add $0x60,%rsp
f: 5b pop %rbx
10: 5d pop %rbp
11: 41 5c pop %r12
13: 41 5d pop %r13
15: c3 retq
16: c3 retq
17: e9 eb 51 45 07 jmpq 0x7455207
1c: cc int3
1d: cc int3
1e: cc int3
1f: cc int3
20: cc int3
21: cc int3
22: cc int3
23: cc int3
24: cc int3
25: cc int3
26: 48 8b 0c 24 mov (%rsp),%rcx
* 2a: 89 f6 mov %esi,%esi <-- trapping instruction
2c: 31 d2 xor %edx,%edx
2e: e9 f3 f9 ff ff jmpq 0xfffffa26
33: 0f 1f 00 nopl (%rax)
36: 48 8b 0c 24 mov (%rsp),%rcx
3a: 89 f6 mov %esi,%esi
3c: ba .byte 0xba
3d: 01 00 add %eax,(%rax)