syzbot


INFO: rcu detected stall in sys_sendmmsg

Status: auto-obsoleted due to no activity on 2023/08/02 15:37
Reported-by: syzbot+cfd48e72578f76af87a2@syzkaller.appspotmail.com
First crash: 466d, last: 466d
Similar bugs (11)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_sendmmsg (2) kernel 2 1685d 1685d 0/27 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in sys_sendmmsg (6) mm net 3 214d 261d 0/27 auto-obsoleted due to no activity on 2024/03/11 17:33
linux-6.1 INFO: rcu detected stall in sys_sendmmsg 1 36d 36d 0/3 upstream: reported on 2024/06/08 04:23
linux-6.1 BUG: soft lockup in sys_sendmmsg 2 379d 408d 0/3 auto-obsoleted due to no activity on 2023/10/08 22:57
upstream INFO: rcu detected stall in sys_sendmmsg (3) kernel 3 919d 1019d 0/27 closed as invalid on 2022/02/08 10:00
linux-5.15 INFO: rcu detected stall in sys_sendmmsg (2) 1 65d 65d 0/3 upstream: reported on 2024/05/09 11:17
upstream INFO: rcu detected stall in sys_sendmmsg (5) net 3 405d 418d 0/27 auto-obsoleted due to no activity on 2023/09/03 00:09
upstream INFO: rcu detected stall in sys_sendmmsg net 2 1769d 1769d 13/27 fixed on 2019/10/09 10:54
upstream INFO: rcu detected stall in sys_sendmmsg (4) net 1 718d 718d 0/27 auto-obsoleted due to no activity on 2022/10/25 00:28
android-5-15 BUG: soft lockup in sys_sendmmsg 1 48d 48d 0/2 premoderation: reported on 2024/05/26 08:47
android-6-1 BUG: soft lockup in sys_sendmmsg 1 261d 261d 0/2 auto-obsoleted due to no activity on 2024/01/25 01:21

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=41f/1/0x4000000000000000 softirq=66067/66067 fqs=1 
	(detected by 1, t=10502 jiffies, g=91685, q=87)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18918 Comm: syz-executor.5 Not tainted 5.15.105-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x71/0x290 mm/kasan/generic.c:189
Code: 54 37 ff 49 c1 ea 03 49 bb 01 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83 fd 10 7f 26 48 85 ed 0f 84 3a 01 00 00 <49> f7 d2 49 01 da 41 80 39 00 0f 85 c4 01 00 00 49 ff c1 49 ff c2
RSP: 0018:ffffc90000007990 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffffffff1f76e14 RCX: ffffffff8162a4e8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbb70a0
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1f76e14
R10: 1ffffffff1f76e14 R11: dffffc0000000001 R12: 0000000000000001
R13: dffffc0000000000 R14: fffffbfff1f76e15 R15: ffff88807704e148
FS:  00007fab932e9700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000c030 CR3: 000000007e04b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 hlock_class kernel/locking/lockdep.c:197 [inline]
 mark_lock+0x98/0x340 kernel/locking/lockdep.c:4568
 mark_usage kernel/locking/lockdep.c:4511 [inline]
 __lock_acquire+0xc97/0x1ff0 kernel/locking/lockdep.c:4965
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x61/0x3f0 lib/debugobjects.c:742
 debug_hrtimer_deactivate kernel/time/hrtimer.c:425 [inline]
 debug_deactivate+0x1b/0x1e0 kernel/time/hrtimer.c:481
 __run_hrtimer kernel/time/hrtimer.c:1653 [inline]
 __hrtimer_run_queues+0x31d/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_lock_switch+0x91/0x100 kernel/sched/core.c:4781
Code: 45 31 c9 68 07 20 59 81 e8 2c 17 09 00 48 83 c4 08 4c 89 ff e8 30 d9 fe ff eb 32 4c 89 ff e8 e6 0a c7 08 e8 61 08 2d 00 fb 5b <41> 5c 41 5d 41 5e 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 87
RSP: 0018:ffffc90003eff298 EFLAGS: 00000286
RAX: e3ddc674fb450d00 RBX: ffff88807ca2d734 RCX: ffffffff913aef03
RDX: dffffc0000000000 RSI: ffffffff8a8af0e0 RDI: ffffffff8ad85140
RBP: ffffc90003eff310 R08: ffffffff818628d0 R09: ffffed10173472d1
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1101734747b R14: ffff8880b9a3a3d8 R15: ffff8880b9a39680
 finish_task_switch+0x134/0x630 kernel/sched/core.c:4898
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0x12cc/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1860
 unix_wait_for_peer+0x24b/0x330 net/unix/af_unix.c:1315
 unix_dgram_sendmsg+0x1441/0x2090 net/unix/af_unix.c:1913
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2412
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2466
 __sys_sendmmsg+0x2bf/0x560 net/socket.c:2552
 __do_sys_sendmmsg net/socket.c:2581 [inline]
 __se_sys_sendmmsg net/socket.c:2578 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2578
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fab94d77169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fab932e9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fab94e96f80 RCX: 00007fab94d77169
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007fab94dd2ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccf00e1ef R14: 00007fab932e9300 R15: 0000000000022000
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g91685 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27040 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
 rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1958
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2131
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 18922 Comm: syz-executor.2 Not tainted 5.15.105-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481
 print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:586
 check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
 rcu_pending kernel/rcu/tree.c:3887 [inline]
 rcu_sched_clock_irq+0x94f/0x1770 kernel/rcu/tree.c:2605
 update_process_times+0x196/0x200 kernel/time/timer.c:1788
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1420
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__sanitizer_cov_trace_pc+0x41/0x60 kernel/kcov.c:202
Code: ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 64 15 00 00 00 74 2c 8b 91 40 15 00 00 83 fa 02 75 21 48 8b 91 48 15 00 00 48 8b 32 <48> 8d 7e 01 8b 89 44 15 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89
RSP: 0018:ffffc90003fef238 EFLAGS: 00000246
RAX: ffffffff81740b84 RBX: 1ffff11017348371 RCX: ffff88802a7a5700
RDX: ffffc90003a31000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90003fef370 R08: ffffffff81740b54 R09: fffffbfff1f76e15
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880b9a41b88 R14: ffff8880b9b3a700 R15: 0000000000000001
 csd_lock_wait kernel/smp.c:440 [inline]
 smp_call_function_many_cond+0xab4/0xd90 kernel/smp.c:969
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
 on_each_cpu include/linux/smp.h:71 [inline]
 flush_tlb_kernel_range+0x197/0x230 arch/x86/mm/tlb.c:1033
 __purge_vmap_area_lazy+0x15ae/0x1740 mm/vmalloc.c:1704
 _vm_unmap_aliases+0x453/0x4e0 mm/vmalloc.c:2107
 change_page_attr_set_clr+0x308/0x1050 arch/x86/mm/pat/set_memory.c:1740
 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline]
 set_memory_ro+0xa1/0xe0 arch/x86/mm/pat/set_memory.c:1943
 bpf_jit_binary_lock_ro include/linux/filter.h:888 [inline]
 bpf_int_jit_compile+0xbf57/0xc6e0 arch/x86/net/bpf_jit_comp.c:2372
 bpf_prog_select_runtime+0x6e2/0x9b0 kernel/bpf/core.c:1926
 bpf_migrate_filter net/core/filter.c:1296 [inline]
 bpf_prepare_filter+0x10d0/0x13d0 net/core/filter.c:1344
 bpf_prog_create_from_user+0x2a7/0x3d0 net/core/filter.c:1438
 seccomp_prepare_filter kernel/seccomp.c:669 [inline]
 seccomp_prepare_user_filter kernel/seccomp.c:706 [inline]
 seccomp_set_mode_filter kernel/seccomp.c:1834 [inline]
 do_seccomp+0x8cf/0x1790 kernel/seccomp.c:1954
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f4d20463169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4d1e9d5168 EFLAGS: 00000246 ORIG_RAX: 000000000000013d
RAX: ffffffffffffffda RBX: 00007f4d20582f80 RCX: 00007f4d20463169
RDX: 0000000020000040 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00007f4d204beca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcd29ce32f R14: 00007f4d1e9d5300 R15: 0000000000022000
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/04 15:36 linux-5.15.y c957cbb87315 928dd177 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_sendmmsg
* Struck through repros no longer work on HEAD.