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WARNING in __free_event

Status: upstream: reported C repro on 2025/04/04 07:02
Subsystems: perf
[Documentation on labels]
Reported-by: syzbot+ff3aa851d46ab82953a3@syzkaller.appspotmail.com
Fix commit: 10a77965760c batman-adv: Fix double-hold of meshif when getting enabled 0ba3a4ab76fd perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 52d, last: 31d
Cause bisection: introduced by (bisect log) :
commit 00b35530811f2aa3d7ceec2dbada80861c7632a8
Author: Eric Dumazet <edumazet@google.com>
Date: Thu Feb 6 14:04:22 2025 +0000

  batman-adv: adopt netdev_hold() / netdev_put()

Crash: unregister_netdevice: waiting for DEV to become free (log)
Repro: C syz .config
  
▶ ▼ Discussions (8)
Title Replies (including bot) Last reply
[PATCH net v5] batman-adv: Fix double-hold of meshif when getting enabled 3 (3) 2025/04/16 03:10
[PATCH AUTOSEL 6.6 05/24] perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init 1 (1) 2025/04/14 13:29
[PATCH AUTOSEL 6.12 05/30] perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init 1 (1) 2025/04/14 13:28
[PATCH AUTOSEL 6.13 06/34] perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init 1 (1) 2025/04/14 13:27
[PATCH AUTOSEL 6.14 06/34] perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init 1 (1) 2025/04/14 13:25
Re: [PATCH net v3] batman-adv: Fix double-hold of meshif when getting enabled 2 (2) 2025/04/10 13:31
[PATCH] perf/core: Prevent WARN_ON(!ctx) in __free_event for partial init 3 (3) 2025/04/06 18:42
[syzbot] [perf?] WARNING in __free_event 0 (6) 2025/04/05 22:58
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/04/05 22:58 30m gshahrouzi@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5fc31936081919a8572a3d644f3fbb258038f337 OK log
2025/04/05 22:52 22m gshahrouzi@gmail.com patch git://git.kernel.dk/linux.git master report log
2025/04/05 22:45 28m gshahrouzi@gmail.com patch git://git.kernel.dk/linux.git syztest OK log
2025/04/05 19:32 22m gshahrouzi@gmail.com patch bpf-next report log
2025/04/05 17:12 8m gshahrouzi@gmail.com patch bpf-next error

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6031 at kernel/events/core.c:5572 __free_event+0x50f/0x620 kernel/events/core.c:5572
Modules linked in:
CPU: 1 UID: 0 PID: 6031 Comm: syz-executor189 Not tainted 6.14.0-syzkaller-g0a87d6bb6fd2 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__free_event+0x50f/0x620 kernel/events/core.c:5572
Code: ff 48 c7 c7 a0 0c df 8e e8 6e a5 a6 ff 43 0f b6 44 25 00 84 c0 0f 85 f5 00 00 00 41 80 26 ef e9 ea fc ff ff e8 d2 46 cb ff 90 <0f> 0b 90 42 80 3c 3b 00 0f 85 2d fe ff ff e9 30 fe ff ff e8 b9 46
RSP: 0018:ffffc9000461f858 EFLAGS: 00010293
RAX: ffffffff81f8104e RBX: 1ffff110089a873c RCX: ffff88802f5dda00
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: 0000000000000003 R08: ffffffff81f80e1b R09: 1ffff1100fc94b45
R10: dffffc0000000000 R11: ffffed100fc94b46 R12: ffff888044d439d8
R13: ffff888044d439e0 R14: 1ffff110089a873b R15: dffffc0000000000
FS:  00007f1a7f6516c0(0000) GS:ffff888125099000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a7f743320 CR3: 000000003461c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inherit_event+0x190/0x9d0 kernel/events/core.c:14036
 inherit_group kernel/events/core.c:14110 [inline]
 inherit_task_group+0x18d/0x4f0 kernel/events/core.c:14177
 perf_event_init_context kernel/events/core.c:14226 [inline]
 perf_event_init_task+0x244/0x650 kernel/events/core.c:14295
 copy_process+0x151e/0x3d10 kernel/fork.c:2403
 kernel_clone+0x242/0x930 kernel/fork.c:2844
 __do_sys_clone kernel/fork.c:2987 [inline]
 __se_sys_clone kernel/fork.c:2971 [inline]
 __x64_sys_clone+0x268/0x2e0 kernel/fork.c:2971
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a7f6b98d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1a7f651218 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f1a7f743338 RCX: 00007f1a7f6b98d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ab009400
RBP: 00007f1a7f743330 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1a7f710a94
R13: affffff7ffffffff R14: 0000200000000180 R15: 00000000ab009400
 </TASK>

Crashes (73):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/03 04:31 bpf-next 0a87d6bb6fd2 996a9618 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/21 11:16 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/20 19:04 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/20 13:24 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/20 05:43 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/20 04:43 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/20 00:25 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/19 20:03 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/18 21:32 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/17 21:59 bpf-next 8582d9ab3efd 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/16 22:25 bpf-next 8582d9ab3efd 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/16 17:50 bpf-next 8582d9ab3efd 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/15 04:54 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/14 22:41 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/14 19:33 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/14 14:55 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/14 12:42 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/13 22:31 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/13 20:42 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/13 16:40 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/13 15:33 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/12 17:32 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/12 07:46 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/11 22:12 bpf-next a27a97f71394 12ba9c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/11 03:53 bpf-next a27a97f71394 1bc60a19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/11 01:28 bpf-next a27a97f71394 1bc60a19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/10 21:45 bpf-next a27a97f71394 1bc60a19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/10 19:37 bpf-next a27a97f71394 1bc60a19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/10 03:10 bpf-next 527b33dda1b5 988b336c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/09 09:34 bpf-next c9661394850d b133e63a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/09 07:28 bpf-next c9661394850d b133e63a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/09 06:20 bpf-next c9661394850d b133e63a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/08 20:09 bpf-next c9661394850d a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/08 06:53 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/08 06:38 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 21:09 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 19:49 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 17:35 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 17:29 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 15:50 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 14:57 bpf-next c9661394850d a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 07:14 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/07 01:48 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 22:44 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 16:36 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 13:29 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 12:02 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 08:29 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 07:41 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 06:58 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/06 01:42 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/05 22:16 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/05 21:14 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/05 19:40 bpf-next c9661394850d 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/05 09:37 bpf-next c9661394850d 1c4febdb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/05 01:59 bpf-next 06a22366d6a1 1c4febdb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/04 22:26 bpf-next 06a22366d6a1 1c4febdb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/04 14:31 bpf-next 06a22366d6a1 d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/04 14:23 bpf-next 06a22366d6a1 d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/04 04:12 bpf-next a1b5bd45d4ee d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/03 22:40 bpf-next a1b5bd45d4ee d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/03 12:15 bpf-next 0a87d6bb6fd2 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/03 09:45 bpf-next 0a87d6bb6fd2 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/03 08:01 bpf-next 0a87d6bb6fd2 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/03 02:52 bpf-next 0a87d6bb6fd2 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/02 09:23 bpf-next 25601e85441d c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/01 15:53 bpf-next 1e7857b28020 d863cf4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/01 05:57 bpf-next 4e82c87058f4 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/04/01 04:02 bpf-next 4e82c87058f4 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/03/31 09:44 bpf-next aa918db707fb d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/03/31 08:47 bpf-next aa918db707fb d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
2025/03/31 06:58 bpf-next aa918db707fb d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in __free_event
* Struck through repros no longer work on HEAD.