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WARNING: suspicious RCU usage in get_callchain_entry

Status: upstream: reported C repro on 2024/06/13 11:30
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+fc37d916410f29b8588d@syzkaller.appspotmail.com
First crash: 358d, last: 11h49m
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2024/06/28 upstream (ToT) 5bbd9b249880 C [report] WARNING: suspicious RCU usage in get_callchain_entry
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING: suspicious RCU usage in get_callchain_entry origin:upstream missing-backport C 718 12h31m 406d 0/3 upstream: reported C repro on 2024/04/26 10:45
upstream WARNING: suspicious RCU usage in get_callchain_entry perf C error 6090 10h17m 402d 0/28 upstream: reported C repro on 2024/04/30 10:49
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/07/15 11:02 14m radoslaw.zielonek@gmail.com patch linux-5.15.y OK log

Sample crash report:
=============================
WARNING: suspicious RCU usage
5.15.182-syzkaller #0 Not tainted
-----------------------------
kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor234/4167:
 #0: ffffffff8c11c020 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312

stack backtrace:
CPU: 1 PID: 4167 Comm: syz-executor234 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 get_callchain_entry+0x2a5/0x3b0 kernel/events/callchain.c:161
 get_perf_callchain+0x9f/0x480 kernel/events/callchain.c:187
 __bpf_get_stack+0x2cb/0x4f0 kernel/bpf/stackmap.c:482
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline]
 bpf_get_stack_raw_tp+0x175/0x1d0 kernel/trace/bpf_trace.c:1480
 bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c
 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_prog_run_pin_on_cpu+0x63/0x140 include/linux/filter.h:652
 bpf_prog_test_run_syscall+0x354/0x4e0 net/bpf/test_run.c:1061
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3368
 __sys_bpf+0x535/0x670 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+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f95f172c629
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007ffe2da2f3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f95f172c629
RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a
RBP: 00002000000000c0 R08: 0000000000000000 R09: 0000000000000000
R10: 000020000000010c R11: 0000000000000246 R12: 00002000000000f0
R13: 00002000000000c8 R14: 0000000000000001 R15: 00002000000000c4
 </TASK>

=============================
WARNING: suspicious RCU usage
5.15.182-syzkaller #0 Not tainted
-----------------------------
include/linux/perf_event.h:1274 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor234/4167:
 #0: ffffffff8c11c020 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312

stack backtrace:
CPU: 1 PID: 4167 Comm: syz-executor234 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 perf_get_guest_cbs include/linux/perf_event.h:1274 [inline]
 perf_callchain_user+0x6d3/0x10e0 arch/x86/events/core.c:2870
 get_perf_callchain+0x35d/0x480 kernel/events/callchain.c:221
 __bpf_get_stack+0x2cb/0x4f0 kernel/bpf/stackmap.c:482
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline]
 bpf_get_stack_raw_tp+0x175/0x1d0 kernel/trace/bpf_trace.c:1480
 bpf_prog_b8a90dd1efcc4ad9+0x3d/0x60c
 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_prog_run_pin_on_cpu+0x63/0x140 include/linux/filter.h:652
 bpf_prog_test_run_syscall+0x354/0x4e0 net/bpf/test_run.c:1061
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3368
 __sys_bpf+0x535/0x670 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+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f95f172c629
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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:00007ffe2da2f3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f95f172c629
RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a
RBP: 00002000000000c0 R08: 0000000000000000 R09: 0000000000000000
R10: 000020000000010c R11: 0000000000000246 R12: 00002000000000f0
R13: 00002000000000c

Crashes (638):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/14 12:12 linux-5.15.y 3b8db0e4f263 7344edeb .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/03/19 22:18 linux-5.15.y 0c935c049b5c e20d7b13 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/11 11:56 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/04 20:26 linux-5.15.y 91786f140358 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/04 19:15 linux-5.15.y 91786f140358 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/04 04:45 linux-5.15.y 91786f140358 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/04 04:05 linux-5.15.y 91786f140358 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/11/18 06:49 linux-5.15.y 0a51d2d4527b cfe3a04a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/07/28 09:13 linux-5.15.y 7e89efd3ae1c 46eb10b7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/06/29 23:09 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/06/28 23:35 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/06/13 13:14 linux-5.15.y c61bd26ae81a 2aa5052f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/06/06 09:18 linux-5.15.y 1c700860e8bc 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/06/05 07:38 linux-5.15.y 1c700860e8bc 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/06/05 06:09 linux-5.15.y 1c700860e8bc 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/06/04 09:34 linux-5.15.y 98f47d0e9b8c a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/29 02:32 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/28 20:58 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/28 08:58 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/27 21:50 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/23 11:50 linux-5.15.y 98f47d0e9b8c fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/23 11:50 linux-5.15.y 98f47d0e9b8c fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/23 09:54 linux-5.15.y 98f47d0e9b8c fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/23 04:36 linux-5.15.y 98f47d0e9b8c fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/23 03:36 linux-5.15.y 98f47d0e9b8c fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/22 10:02 linux-5.15.y a68c15152131 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/22 05:56 linux-5.15.y a68c15152131 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/18 15:10 linux-5.15.y a68c15152131 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/17 10:32 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/17 01:42 linux-5.15.y 3b8db0e4f263 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/14 06:42 linux-5.15.y 3b8db0e4f263 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/13 10:33 linux-5.15.y 3b8db0e4f263 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/13 08:37 linux-5.15.y 3b8db0e4f263 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/13 02:21 linux-5.15.y 3b8db0e4f263 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/12 20:22 linux-5.15.y 3b8db0e4f263 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/10 02:20 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/09 05:06 linux-5.15.y 16fdf2c7111b bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/05/08 03:05 linux-5.15.y 16fdf2c7111b dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/07 04:55 linux-5.15.y 16fdf2c7111b 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/03 10:21 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/02 05:38 linux-5.15.y f7347f400572 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/05/02 05:15 linux-5.15.y f7347f400572 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/04/30 03:30 linux-5.15.y f7347f400572 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/29 22:53 linux-5.15.y f7347f400572 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/04/19 14:39 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/19 10:24 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/04/13 00:24 linux-5.15.y f7347f400572 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/11 15:31 linux-5.15.y f7347f400572 94486846 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/11 13:57 linux-5.15.y f7347f400572 94486846 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/11 09:06 linux-5.15.y f7347f400572 94486846 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/04/11 01:44 linux-5.15.y f7347f400572 1ef3ab4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/11 01:44 linux-5.15.y f7347f400572 1ef3ab4d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/07 07:32 linux-5.15.y 0c935c049b5c 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/03 13:17 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/03 08:54 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/04/02 18:41 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/02 15:41 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/04/02 10:30 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/03/28 10:09 linux-5.15.y 0c935c049b5c 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/03/28 07:53 linux-5.15.y 0c935c049b5c 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/03/28 07:53 linux-5.15.y 0c935c049b5c 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/03/22 05:48 linux-5.15.y 0c935c049b5c c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/03/22 00:58 linux-5.15.y 0c935c049b5c c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/06/13 11:29 linux-5.15.y c61bd26ae81a 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: suspicious RCU usage in get_callchain_entry
* Struck through repros no longer work on HEAD.