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AKwUvBwaWKObgLWDhU0xEe7kCzxLfV4UrYWJUKgwzKU7rW0D0Nw0JhhhMSrh1yt/TBgk+xeMTZfddJ5hwFsq4PEA@lists.linux.dev X-Gm-Message-State: AFq9FYJGJ3uAdHrQnVDLBmyhTo4lLFK4/kz/E7yFdlUzKISsqOpQ5D8m ZIe1r57M220YgUv0r3N57FkhYHpunH5gNzZpM435skLeIWIWXMDU41duAsSs7ZrcewM+gAzaEt4 03oasXRBDqA8mGxBfyY2RYaRK233GWwGIo5tnhWIe3RLgR3081p+osTAXuXc= Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3509:b0:4d7:17d5:6c9b with SMTP id 5614622812f47-53cc1ef9b0cmr725570b6e.9.1792183123019; Fri, 16 Oct 2026 13:38:43 -0700 (PDT) Date: Fri, 16 Oct 2026 13:38:43 -0700 In-Reply-To: <6ad27bcb.6814cce4.34c49f.000b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad28b52.a6d1a155.34a93f.0005.GAE@google.com> Subject: Re: [syzbot] [greybus?] WARNING: ODEBUG bug in gb_operation_sync_timeout From: syzbot To: elder@kernel.org, gregkh@linuxfoundation.org, greybus-dev-bounces@lists.linaro.org, greybus-dev@lists.linaro.org, johan@kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-staging@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 2f2f7eeef8b0 Merge tag 'soc-fixes-7.3-3' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13a0d18e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4ccb65e03706547e dashboard link: https://syzkaller.appspot.com/bug?extid=a2e50fb40695811c2dab compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=172ff571580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1333e971580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-2f2f7eee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5c84d55442c9/vmlinux-2f2f7eee.xz kernel image: https://storage.googleapis.com/syzbot-assets/45a44266fe39/bzImage-2f2f7eee.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a2e50fb40695811c2dab@syzkaller.appspotmail.com greybus greybus1: 0/0:0: synchronous operation id 0x0003 of type 0x14 failed: -71 ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff8880353040d0 object type: timer_list hint: gb_operation_timeout+0x0/0x110 drivers/greybus/operation.c:1265 WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230 lib/debugobjects.c:629, CPU#0: kworker/u4:7/180 Modules linked in: CPU: 0 UID: 0 PID: 180 Comm: kworker/u4:7 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: greybus1:0 gb_operation_work RIP: 0010:debug_print_object+0x18a/0x230 lib/debugobjects.c:629 Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 cd 97 4c fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 73 bf 8c 0c 48 83 c4 10 5b 41 5c RSP: 0018:ffffc90001a2f780 EFLAGS: 00010246 RAX: 1ffffffff181f08c RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffffffff8c6df740 RSI: ffffffff8c6df1c0 RDI: ffffffff9185c030 RBP: ffffffff8c6df740 R08: ffff8880353040d0 R09: ffffffff8c0f97c0 R10: dffffc0000000000 R11: ffffffff81b3f760 R12: 0000000000000000 R13: ffffffff9185c030 R14: ffff8880353040d0 R15: ffffffff8c0f8460 FS: 0000000000000000(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5280b524c0 CR3: 000000000fb48000 CR4: 0000000000352ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1171 [inline] debug_check_no_obj_freed+0x2e3/0x450 lib/debugobjects.c:1201 slab_free_hook mm/slub.c:2679 [inline] slab_free mm/slub.c:6509 [inline] kmem_cache_free+0xfd/0x650 mm/slub.c:6636 gb_operation_sync_timeout+0x1c7/0x270 drivers/greybus/operation.c:1172 gb_operation_sync include/linux/greybus/operation.h:203 [inline] gb_svc_pwrmon_rail_count_get drivers/greybus/svc.c:137 [inline] gb_svc_pwrmon_debugfs_init drivers/greybus/svc.c:772 [inline] gb_svc_debugfs_init drivers/greybus/svc.c:827 [inline] gb_svc_hello drivers/greybus/svc.c:875 [inline] gb_svc_request_handler+0x902/0x1300 drivers/greybus/svc.c:1276 gb_operation_request_handle drivers/greybus/operation.c:243 [inline] gb_operation_work+0xe1/0x960 drivers/greybus/operation.c:280 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: f8 clc 1: 48 c1 e8 03 shr $0x3,%rax 5: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 9: 74 08 je 0x13 b: 4c 89 ff mov %r15,%rdi e: e8 cd 97 4c fd call 0xfd4c97e0 13: 4d 8b 0f mov (%r15),%r9 16: 4c 89 ef mov %r13,%rdi 19: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 1e: 48 89 ea mov %rbp,%rdx 21: 44 89 e1 mov %r12d,%ecx 24: 4d 89 f0 mov %r14,%r8 27: ff 34 24 push (%rsp) * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 08 add $0x8,%rsp 33: ff 05 73 bf 8c 0c incl 0xc8cbf73(%rip) # 0xc8cbfac 39: 48 83 c4 10 add $0x10,%rsp 3d: 5b pop %rbx 3e: 41 5c pop %r12 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.