* [syzbot] [greybus?] WARNING: ODEBUG bug in gb_operation_sync_timeout
@ 2026-10-16 19:32 syzbot
2026-10-16 20:38 ` syzbot
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2026-10-16 19:32 UTC (permalink / raw)
To: elder, gregkh, greybus-dev, johan, linux-kernel, linux-media,
linux-staging, syzkaller-bugs
Hello,
syzbot found 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=157b1bd1580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c4b098695335c89f
dashboard link: https://syzkaller.appspot.com/bug?extid=a2e50fb40695811c2dab
compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e46a243fa39c/disk-2f2f7eee.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/04a37a0099c0/vmlinux-2f2f7eee.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c2964fdca34d/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 0x0002 of type 0x10 failed: -71
------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888087f2c878 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#1: kworker/u8:19/14610
Modules linked in:
CPU: 1 UID: 0 PID: 14610 Comm: kworker/u8:19 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: greybus1:svc gb_svc_process_deferred_request
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 4d 99 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 f3 4c 8e 0c 48 83 c4 10 5b 41 5c
RSP: 0018:ffffc9000767f7e0 EFLAGS: 00010246
RAX: 1ffffffff181f08c RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffffff8c6de740 RSI: ffffffff8c6de1c0 RDI: ffffffff91859a20
RBP: ffffffff8c6de740 R08: ffff888087f2c878 R09: ffffffff8c0f97c0
R10: dffffc0000000000 R11: ffffffff81b3f760 R12: 0000000000000000
R13: ffffffff91859a20 R14: ffff888087f2c878 R15: ffffffff8c0f8460
FS: 0000000000000000(0000) GS:ffff888123bbf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c25d909 CR3: 0000000071620000 CR4: 00000000003526f0
Call Trace:
<TASK>
__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_intf_set_power_mode drivers/greybus/svc.c:584 [inline]
gb_svc_process_hello_deferred drivers/greybus/svc.c:936 [inline]
gb_svc_process_deferred_request+0x5f3/0x1150 drivers/greybus/svc.c:1102
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
</TASK>
----------------
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 4d 99 4c fd call 0xfd4c9960
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 f3 4c 8e 0c incl 0xc8e4cf3(%rip) # 0xc8e4d2c
39: 48 83 c4 10 add $0x10,%rsp
3d: 5b pop %rbx
3e: 41 5c pop %r12
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this issue. See:
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [syzbot] [greybus?] WARNING: ODEBUG bug in gb_operation_sync_timeout
2026-10-16 19:32 [syzbot] [greybus?] WARNING: ODEBUG bug in gb_operation_sync_timeout syzbot
@ 2026-10-16 20:38 ` syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2026-10-16 20:38 UTC (permalink / raw)
To: elder, gregkh, greybus-dev-bounces, greybus-dev, johan,
linux-kernel, linux-media, linux-staging, syzkaller-bugs
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:
<TASK>
__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
</TASK>
----------------
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-10-16 19:32 [syzbot] [greybus?] WARNING: ODEBUG bug in gb_operation_sync_timeout syzbot
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