* [moderation/CI] Re: net: af_packet: Use hrtimer to do the retire operation
@ 2025-08-20 13:39 syzbot ci
2025-08-20 13:48 ` Aleksandr Nogikh
0 siblings, 1 reply; 2+ messages in thread
From: syzbot ci @ 2025-08-20 13:39 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v6] net: af_packet: Use hrtimer to do the retire operation
https://lore.kernel.org/all/20250820092925.2115372-1-jackzxcui1989@163.com
* [PATCH net-next v6] net: af_packet: Use hrtimer to do the retire operation
and found the following issue:
WARNING in hrtimer_forward
Full report is available here:
https://ci.syzbot.org/series/81b08fd6-a740-4520-9c88-b7dcdc7953a1
***
WARNING in hrtimer_forward
tree: net-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
base: da114122b83149d1f1db0586b1d67947b651aa20
arch: amd64
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
config: https://ci.syzbot.org/builds/0ebac6ed-b7ae-4c3d-9edc-db3a521ad7a0/config
C repro: https://ci.syzbot.org/findings/c3421800-7bbc-4097-a1cf-36e97a4dea98/c_repro
syz repro: https://ci.syzbot.org/findings/c3421800-7bbc-4097-a1cf-36e97a4dea98/syz_repro
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6012 at kernel/time/hrtimer.c:1052 hrtimer_forward+0x1d6/0x2b0 kernel/time/hrtimer.c:1052
Modules linked in:
CPU: 1 UID: 0 PID: 6012 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hrtimer_forward+0x1d6/0x2b0 kernel/time/hrtimer.c:1052
Code: 4c 89 33 48 8b 04 24 eb 07 e8 66 30 12 00 31 c0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 b0 ce 09 cc e8 4b 30 12 00 90 <0f> 0b 90 eb df 48 89 e8 4c 09 f8 48 c1 e8 20 74 0a 48 89 e8 31 d2
RSP: 0018:ffffc900029def90 EFLAGS: 00010293
RAX: ffffffff81ad7be5 RBX: ffff888028782648 RCX: ffff88810e88d640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 000000000000116b R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: ffffffff81724e10 R12: ffff888028782660
R13: 00000000007a1200 R14: 1ffff110050f04cc R15: 0000000000000001
FS: 000055555f6cd500(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcf1be3d88 CR3: 0000000023c86000 CR4: 00000000000006f0
Call Trace:
<TASK>
hrtimer_forward_now include/linux/hrtimer.h:366 [inline]
_prb_refresh_rx_retire_blk_timer net/packet/af_packet.c:697 [inline]
prb_open_block+0x3a7/0x5e0 net/packet/af_packet.c:930
prb_dispatch_next_block net/packet/af_packet.c:994 [inline]
__packet_lookup_frame_in_block net/packet/af_packet.c:1152 [inline]
packet_current_rx_frame net/packet/af_packet.c:1178 [inline]
tpacket_rcv+0x1229/0x2f40 net/packet/af_packet.c:2409
deliver_skb net/core/dev.c:2472 [inline]
deliver_ptype_list_skb net/core/dev.c:2487 [inline]
__netif_receive_skb_core+0x3107/0x4020 net/core/dev.c:5923
__netif_receive_skb_list_core+0x23f/0x800 net/core/dev.c:6054
__netif_receive_skb_list net/core/dev.c:6121 [inline]
netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6212
netif_receive_skb_list+0x54/0x450 net/core/dev.c:6264
xdp_recv_frames net/bpf/test_run.c:280 [inline]
xdp_test_run_batch net/bpf/test_run.c:361 [inline]
bpf_test_run_xdp_live+0x1786/0x1b10 net/bpf/test_run.c:390
bpf_prog_test_run_xdp+0x713/0x1000 net/bpf/test_run.c:1322
bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4590
__sys_bpf+0x581/0x870 kernel/bpf/syscall.c:6047
__do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31da38ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcf1be5358 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f31da5b5fa0 RCX: 00007f31da38ebe9
RDX: 0000000000000050 RSI: 0000200000000600 RDI: 000000000000000a
RBP: 00007f31da411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31da5b5fa0 R14: 00007f31da5b5fa0 R15: 0000000000000003
</TASK>
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
The email will later be sent to:
[davem@davemloft.net edumazet@google.com ferenc@fejes.dev horms@kernel.org jackzxcui1989@163.com kuba@kernel.org linux-kernel@vger.kernel.org netdev@vger.kernel.org pabeni@redhat.com willemdebruijn.kernel@gmail.com]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [moderation/CI] Re: net: af_packet: Use hrtimer to do the retire operation
2025-08-20 13:39 [moderation/CI] Re: net: af_packet: Use hrtimer to do the retire operation syzbot ci
@ 2025-08-20 13:48 ` Aleksandr Nogikh
0 siblings, 0 replies; 2+ messages in thread
From: Aleksandr Nogikh @ 2025-08-20 13:48 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Wed, Aug 20, 2025 at 3:39 PM syzbot ci
<syzbot+ci1b055c1c5811b39f@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v6] net: af_packet: Use hrtimer to do the retire operation
> https://lore.kernel.org/all/20250820092925.2115372-1-jackzxcui1989@163.com
> * [PATCH net-next v6] net: af_packet: Use hrtimer to do the retire operation
>
> and found the following issue:
> WARNING in hrtimer_forward
>
> Full report is available here:
> https://ci.syzbot.org/series/81b08fd6-a740-4520-9c88-b7dcdc7953a1
>
> ***
>
> WARNING in hrtimer_forward
>
> tree: net-next
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
> base: da114122b83149d1f1db0586b1d67947b651aa20
> arch: amd64
> compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
> config: https://ci.syzbot.org/builds/0ebac6ed-b7ae-4c3d-9edc-db3a521ad7a0/config
> C repro: https://ci.syzbot.org/findings/c3421800-7bbc-4097-a1cf-36e97a4dea98/c_repro
> syz repro: https://ci.syzbot.org/findings/c3421800-7bbc-4097-a1cf-36e97a4dea98/syz_repro
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 6012 at kernel/time/hrtimer.c:1052 hrtimer_forward+0x1d6/0x2b0 kernel/time/hrtimer.c:1052
> Modules linked in:
> CPU: 1 UID: 0 PID: 6012 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> RIP: 0010:hrtimer_forward+0x1d6/0x2b0 kernel/time/hrtimer.c:1052
> Code: 4c 89 33 48 8b 04 24 eb 07 e8 66 30 12 00 31 c0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 b0 ce 09 cc e8 4b 30 12 00 90 <0f> 0b 90 eb df 48 89 e8 4c 09 f8 48 c1 e8 20 74 0a 48 89 e8 31 d2
> RSP: 0018:ffffc900029def90 EFLAGS: 00010293
> RAX: ffffffff81ad7be5 RBX: ffff888028782648 RCX: ffff88810e88d640
> RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
> RBP: 000000000000116b R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
> R10: dffffc0000000000 R11: ffffffff81724e10 R12: ffff888028782660
> R13: 00000000007a1200 R14: 1ffff110050f04cc R15: 0000000000000001
> FS: 000055555f6cd500(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007ffcf1be3d88 CR3: 0000000023c86000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> hrtimer_forward_now include/linux/hrtimer.h:366 [inline]
> _prb_refresh_rx_retire_blk_timer net/packet/af_packet.c:697 [inline]
> prb_open_block+0x3a7/0x5e0 net/packet/af_packet.c:930
> prb_dispatch_next_block net/packet/af_packet.c:994 [inline]
> __packet_lookup_frame_in_block net/packet/af_packet.c:1152 [inline]
> packet_current_rx_frame net/packet/af_packet.c:1178 [inline]
> tpacket_rcv+0x1229/0x2f40 net/packet/af_packet.c:2409
> deliver_skb net/core/dev.c:2472 [inline]
> deliver_ptype_list_skb net/core/dev.c:2487 [inline]
> __netif_receive_skb_core+0x3107/0x4020 net/core/dev.c:5923
> __netif_receive_skb_list_core+0x23f/0x800 net/core/dev.c:6054
> __netif_receive_skb_list net/core/dev.c:6121 [inline]
> netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6212
> netif_receive_skb_list+0x54/0x450 net/core/dev.c:6264
> xdp_recv_frames net/bpf/test_run.c:280 [inline]
> xdp_test_run_batch net/bpf/test_run.c:361 [inline]
> bpf_test_run_xdp_live+0x1786/0x1b10 net/bpf/test_run.c:390
> bpf_prog_test_run_xdp+0x713/0x1000 net/bpf/test_run.c:1322
> bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4590
> __sys_bpf+0x581/0x870 kernel/bpf/syscall.c:6047
> __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
> __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
> __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
> do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f31da38ebe9
> Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffcf1be5358 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
> RAX: ffffffffffffffda RBX: 00007f31da5b5fa0 RCX: 00007f31da38ebe9
> RDX: 0000000000000050 RSI: 0000200000000600 RDI: 000000000000000a
> RBP: 00007f31da411e19 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007f31da5b5fa0 R14: 00007f31da5b5fa0 R15: 0000000000000003
> </TASK>
>
>
> ***
>
> If these findings have caused you to resend the series or submit a
> separate fix, please add the following tag to your commit message:
> Tested-by: syzbot@syzkaller.appspotmail.com
>
> ---
> This report is generated by a bot. It may contain errors.
> syzbot ci engineers can be reached at syzkaller@googlegroups.com.
>
> The email will later be sent to:
> [davem@davemloft.net edumazet@google.com ferenc@fejes.dev horms@kernel.org jackzxcui1989@163.com kuba@kernel.org linux-kernel@vger.kernel.org netdev@vger.kernel.org pabeni@redhat.com willemdebruijn.kernel@gmail.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> --
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2025-08-20 13:39 [moderation/CI] Re: net: af_packet: Use hrtimer to do the retire operation syzbot ci
2025-08-20 13:48 ` Aleksandr Nogikh
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