syzbot


WARNING: suspicious RCU usage in get_callchain_entry

Status: upstream: reported C repro on 2024/04/26 10:45
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+a7ca37e23072f6e28af5@syzkaller.appspotmail.com
First crash: 296d, last: 14h13m
Bug presence (3)
Date Name Commit Repro Result
2025/01/23 linux-6.1.y (ToT) f4f677285b38 C [report] WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 upstream (ToT) c942a0cd3603 C [report] WARNING: suspicious RCU usage in get_callchain_entry
2025/01/23 upstream (ToT) 7004a2e46d16 C Didn't crash
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING: suspicious RCU usage in get_callchain_entry origin:upstream C 480 1d09h 248d 0/3 upstream: reported C repro on 2024/06/13 11:30
upstream WARNING: suspicious RCU usage in get_callchain_entry perf C error 4877 1d10h 292d 0/28 upstream: reported C repro on 2024/04/30 10:49

Sample crash report:
=============================
WARNING: suspicious RCU usage
6.1.122-syzkaller #0 Tainted: G        W         
-----------------------------
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-executor290/4245:
 #0: ffffffff8d32b9a0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #0: ffffffff8d32b9a0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x37/0x70 include/linux/rcupdate_trace.h:57

stack backtrace:
CPU: 0 PID: 4245 Comm: syz-executor290 Tainted: G        W          6.1.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 lockdep_rcu_suspicious+0x21c/0x330 kernel/locking/lockdep.c:6608
 get_callchain_entry+0x2ac/0x3c0 kernel/events/callchain.c:161
 get_perf_callchain+0xe6/0x810 kernel/events/callchain.c:187
 __bpf_get_stack+0x378/0x570 kernel/bpf/stackmap.c:438
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1879 [inline]
 bpf_get_stack_raw_tp+0x1b2/0x220 kernel/trace/bpf_trace.c:1869
 bpf_prog_b8a90dd1efcc4ad9+0x3d/0x41
 bpf_dispatcher_nop_func include/linux/bpf.h:992 [inline]
 __bpf_prog_run include/linux/filter.h:603 [inline]
 bpf_prog_run include/linux/filter.h:610 [inline]
 bpf_prog_run_pin_on_cpu+0x62/0x130 include/linux/filter.h:627
 bpf_prog_test_run_syscall+0x312/0x4d0 net/bpf/test_run.c:1635
 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3685
 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5038
 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5122 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f79266b06a9
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:00007ffff45e4cf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffff45e4ec8 RCX: 00007f79266b06a9
RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a
RBP: 00007f7926723610 R08: 00007ffff45e4ec8 R09: 000

Crashes (560):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/30 05:56 linux-6.1.y 563edd786f0a d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/06/12 05:34 linux-6.1.y 88690811da69 4d75f4f7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/05/09 01:11 linux-6.1.y 909ba1f1b414 20bf80e1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/05/01 03:04 linux-6.1.y dcbc050cb0d3 3ba885bc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 17:16 linux-6.1.y 6741e066ec76 059e9963 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 16:44 linux-6.1.y 6741e066ec76 059e9963 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 16:15 linux-6.1.y 6741e066ec76 059e9963 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 15:42 linux-6.1.y 6741e066ec76 059e9963 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 11:02 linux-6.1.y 6741e066ec76 8bdc0f22 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/16 17:43 linux-6.1.y 0cbb5f65e52f 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/09 20:43 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/02/09 19:40 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/09 08:40 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/09 06:30 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/02/09 06:24 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/02/08 17:32 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/08 16:21 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/02/05 06:41 linux-6.1.y 0cbb5f65e52f 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/02 05:47 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/02/02 00:53 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/02/01 03:10 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/31 20:46 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/31 20:45 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/27 20:38 linux-6.1.y 75cefdf153f5 d99a33ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/27 16:42 linux-6.1.y 75cefdf153f5 d99a33ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/23 00:31 linux-6.1.y f4f677285b38 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/22 20:24 linux-6.1.y f4f677285b38 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/16 17:56 linux-6.1.y c63962be84ef f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/16 11:52 linux-6.1.y c63962be84ef 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/16 03:58 linux-6.1.y c63962be84ef 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/15 22:54 linux-6.1.y c63962be84ef 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/15 22:52 linux-6.1.y c63962be84ef 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/13 19:23 linux-6.1.y c63962be84ef 249ceea9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/13 14:43 linux-6.1.y c63962be84ef 249ceea9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/12 23:05 linux-6.1.y c63962be84ef 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/12 13:38 linux-6.1.y c63962be84ef 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/12 07:40 linux-6.1.y c63962be84ef 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2025/01/05 05:20 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2025/01/05 02:46 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/30 04:57 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/27 23:32 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/27 18:53 linux-6.1.y 563edd786f0a d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/24 04:16 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/24 01:04 linux-6.1.y 29f02ec58a94 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/19 15:12 linux-6.1.y 52f863f820fd 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/19 04:44 linux-6.1.y 52f863f820fd 1432fc84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/16 19:55 linux-6.1.y 52f863f820fd eec85da6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/16 15:12 linux-6.1.y 52f863f820fd eec85da6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/15 20:59 linux-6.1.y 52f863f820fd 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/15 20:59 linux-6.1.y 52f863f820fd 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/15 11:31 linux-6.1.y 52f863f820fd 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/11 22:24 linux-6.1.y e4d90d63d385 ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/12/11 18:00 linux-6.1.y e4d90d63d385 ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/08 07:55 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/08 04:38 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in get_callchain_entry
2024/12/08 04:13 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
2024/04/26 10:45 linux-6.1.y 6741e066ec76 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in get_callchain_entry
* Struck through repros no longer work on HEAD.