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INFO: rcu detected stall in sys_bpf (2)

Status: upstream: reported on 2024/04/09 19:57
Reported-by: syzbot+4ca114518ed3e3b28ead@syzkaller.appspotmail.com
First crash: 294d, last: 20d
▶ ▼ Similar bugs (13)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_bpf (5) bpf C unreliable 56 1102d 1195d 0/28 closed as invalid on 2022/02/08 10:34
upstream INFO: rcu detected stall in sys_bpf (9) bpf C error 74 5d18h 245d 0/28 upstream: reported C repro on 2024/05/28 13:32
upstream INFO: rcu detected stall in sys_bpf (3) bpf 4 1847d 1847d 0/28 closed as invalid on 2020/01/09 08:13
linux-5.15 INFO: rcu detected stall in sys_bpf 2 418d 460d 0/3 auto-obsoleted due to no activity on 2024/03/16 17:33
upstream INFO: rcu detected stall in sys_bpf bpf net 3 2013d 2134d 0/28 auto-closed as invalid on 2019/11/23 00:18
upstream INFO: rcu detected stall in sys_bpf (2) bpf 12 1882d 1883d 0/28 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in sys_bpf (8) bpf 1 436d 436d 0/28 auto-obsoleted due to no activity on 2024/02/17 03:10
linux-6.1 INFO: rcu detected stall in sys_bpf 16 53d 283d 0/3 upstream: reported on 2024/04/20 10:27
linux-4.19 INFO: rcu detected stall in sys_bpf 3 1831d 1961d 0/1 auto-closed as invalid on 2020/05/23 14:47
upstream INFO: rcu detected stall in sys_bpf (6) net 7 913d 1063d 0/28 auto-obsoleted due to no activity on 2022/10/28 06:32
upstream INFO: rcu detected stall in sys_bpf (4) bpf net 3 1800d 1839d 0/28 auto-closed as invalid on 2020/05/24 13:03
android-5-15 BUG: soft lockup in sys_bpf origin:upstream C error 108 138d 305d 0/2 upstream: reported C repro on 2024/03/29 12:25
android-5-10 BUG: soft lockup in sys_bpf 2 218d 222d 0/2 auto-obsoleted due to no activity on 2024/09/22 11:37

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9370/1:b..l
	(detected by 0, t=10502 jiffies, g=28265, q=1651)
task:syz.0.1464      state:R  running task     stack:25592 pid: 9370 ppid:  4172 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:65
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc90002fdf880 EFLAGS: 00000202
RAX: ffffffff885e8b00 RBX: ffff88801c71a780 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffc90002fdf9e2
RBP: 00000000000c0000 R08: dffffc0000000000 R09: ffffc90002fdf9e0
R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000c0000
R13: 0000000000000002 R14: ffffc90002fdf9e0 R15: 000000000000004e
 ____bpf_skb_load_bytes_relative net/core/filter.c:1819 [inline]
 bpf_skb_load_bytes_relative+0x16d/0x1f0 net/core/filter.c:1789
 bpf_prog_346f3b72d653cbc8+0x46/0x9b4
 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x3f4/0x8a0 net/bpf/test_run.c:119
 bpf_prog_test_run_skb+0xb41/0x1420 net/bpf/test_run.c:669
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3368
 __sys_bpf+0x3ac/0x670 kernel/bpf/syscall.c:4669
 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdb266bad29
RSP: 002b:00007fdb2452b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fdb268aafa0 RCX: 00007fdb266bad29
RDX: 0000000000000050 RSI: 0000000020000180 RDI: 000000000000000a
RBP: 00007fdb26736b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdb268aafa0 R15: 00007ffc61ea2a48
 </TASK>

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/08 07:49 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/10/21 01:03 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/10/07 23:10 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/10/04 09:26 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/09/29 02:49 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/09/11 06:26 linux-5.15.y 14e468424d3e 8ab55d0e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/09/03 20:34 linux-5.15.y fa93fa65db6e 326f9c5a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/09/01 03:43 linux-5.15.y fa93fa65db6e 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/08/17 16:09 linux-5.15.y 7e89efd3ae1c dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/08/05 21:48 linux-5.15.y 7e89efd3ae1c e35c337f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf INFO: rcu detected stall in sys_bpf
2024/06/17 17:38 linux-5.15.y 4878aadf2d15 1f11cfd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_bpf
2024/06/12 09:15 linux-5.15.y c61bd26ae81a 4d75f4f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_bpf
2024/05/28 06:04 linux-5.15.y c61bd26ae81a f550015e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_bpf
2024/05/07 13:28 linux-5.15.y 284087d4f7d5 cb2dcc0e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_bpf
2024/04/09 19:57 linux-5.15.y 9465fef4ae35 171ec371 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: rcu detected stall in sys_bpf
* Struck through repros no longer work on HEAD.