* [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
@ 2025-09-03 16:14 syzbot ci
2025-09-03 17:43 ` Aleksandr Nogikh
0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2025-09-03 16:14 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v1] net: devmem: improve cpu cost of RX token management
https://lore.kernel.org/all/20250902-scratch-bobbyeshleman-devmem-tcp-token-upstream-v1-0-d946169b5550@meta.com
* [PATCH net-next 1/2] net: devmem: rename tx_vec to vec in dmabuf binding
* [PATCH net-next 2/2] net: devmem: use niov array for token management
and found the following issue:
general protection fault in sock_devmem_dontneed
Full report is available here:
https://ci.syzbot.org/series/c0dc7223-4222-461c-b04b-b6f0004c7509
***
general protection fault in sock_devmem_dontneed
tree: net-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
base: 864ecc4a6dade82d3f70eab43dad0e277aa6fc78
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/6c521908-0a73-48bc-a0fd-2576cf868361/config
C repro: https://ci.syzbot.org/findings/9374f388-d643-42ea-831b-872eb5000b3c/c_repro
syz repro: https://ci.syzbot.org/findings/9374f388-d643-42ea-831b-872eb5000b3c/syz_repro
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5993 Comm: syz.0.17 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:sock_devmem_dontneed+0x3fd/0x960 net/core/sock.c:1112
Code: 8b 44 24 40 44 8b 28 44 03 6c 24 14 48 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 ff e8 4d eb c9 f8 4d 8b 3f 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 34 eb c9 f8 4d 8b 3f 4c 89 f8 48
RSP: 0018:ffffc90001c4fac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11004ddcfe0
RDX: ffff88801f6a8000 RSI: 0000000000000400 RDI: 0000000000000000
RBP: ffffc90001c4fc50 R08: ffffc90001c4fbdf R09: 0000000000000000
R10: ffffc90001c4fb60 R11: fffff52000389f7c R12: dffffc0000000000
R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 000055558634d500(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30e63fff CR3: 0000000026b68000 CR4: 00000000000006f0
Call Trace:
<TASK>
sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1302
do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
__sys_setsockopt net/socket.c:2369 [inline]
__do_sys_setsockopt net/socket.c:2375 [inline]
__se_sys_setsockopt net/socket.c:2372 [inline]
__x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
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: 0033:0x7fea2bb8ebe9
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:00007ffc81c63348 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fea2bdc5fa0 RCX: 00007fea2bb8ebe9
RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fea2bc11e19 R08: 0000000000000048 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea2bdc5fa0 R14: 00007fea2bdc5fa0 R15: 0000000000000005
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sock_devmem_dontneed+0x3fd/0x960 net/core/sock.c:1112
Code: 8b 44 24 40 44 8b 28 44 03 6c 24 14 48 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 ff e8 4d eb c9 f8 4d 8b 3f 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 34 eb c9 f8 4d 8b 3f 4c 89 f8 48
RSP: 0018:ffffc90001c4fac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11004ddcfe0
RDX: ffff88801f6a8000 RSI: 0000000000000400 RDI: 0000000000000000
RBP: ffffc90001c4fc50 R08: ffffc90001c4fbdf R09: 0000000000000000
R10: ffffc90001c4fb60 R11: fffff52000389f7c R12: dffffc0000000000
R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000000
FS: 000055558634d500(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30e63fff CR3: 0000000026b68000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
0: 8b 44 24 40 mov 0x40(%rsp),%eax
4: 44 8b 28 mov (%rax),%r13d
7: 44 03 6c 24 14 add 0x14(%rsp),%r13d
c: 48 8b 44 24 20 mov 0x20(%rsp),%rax
11: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
16: 74 08 je 0x20
18: 4c 89 ff mov %r15,%rdi
1b: e8 4d eb c9 f8 call 0xf8c9eb6d
20: 4d 8b 3f mov (%r15),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 ff mov %r15,%rdi
34: e8 34 eb c9 f8 call 0xf8c9eb6d
39: 4d 8b 3f mov (%r15),%r15
3c: 4c 89 f8 mov %r15,%rax
3f: 48 rex.W
***
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:
[almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
2025-09-03 16:14 syzbot ci
@ 2025-09-03 17:43 ` Aleksandr Nogikh
0 siblings, 0 replies; 7+ messages in thread
From: Aleksandr Nogikh @ 2025-09-03 17:43 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Wed, Sep 3, 2025 at 6:15 PM syzbot ci
<syzbot+ci21b000914d5f7f34@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v1] net: devmem: improve cpu cost of RX token management
> https://lore.kernel.org/all/20250902-scratch-bobbyeshleman-devmem-tcp-token-upstream-v1-0-d946169b5550@meta.com
> * [PATCH net-next 1/2] net: devmem: rename tx_vec to vec in dmabuf binding
> * [PATCH net-next 2/2] net: devmem: use niov array for token management
>
> and found the following issue:
> general protection fault in sock_devmem_dontneed
>
> Full report is available here:
> https://ci.syzbot.org/series/c0dc7223-4222-461c-b04b-b6f0004c7509
>
> ***
>
> general protection fault in sock_devmem_dontneed
>
> tree: net-next
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
> base: 864ecc4a6dade82d3f70eab43dad0e277aa6fc78
> arch: amd64
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> config: https://ci.syzbot.org/builds/6c521908-0a73-48bc-a0fd-2576cf868361/config
> C repro: https://ci.syzbot.org/findings/9374f388-d643-42ea-831b-872eb5000b3c/c_repro
> syz repro: https://ci.syzbot.org/findings/9374f388-d643-42ea-831b-872eb5000b3c/syz_repro
>
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 0 UID: 0 PID: 5993 Comm: syz.0.17 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:sock_devmem_dontneed+0x3fd/0x960 net/core/sock.c:1112
> Code: 8b 44 24 40 44 8b 28 44 03 6c 24 14 48 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 ff e8 4d eb c9 f8 4d 8b 3f 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 34 eb c9 f8 4d 8b 3f 4c 89 f8 48
> RSP: 0018:ffffc90001c4fac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11004ddcfe0
> RDX: ffff88801f6a8000 RSI: 0000000000000400 RDI: 0000000000000000
> RBP: ffffc90001c4fc50 R08: ffffc90001c4fbdf R09: 0000000000000000
> R10: ffffc90001c4fb60 R11: fffff52000389f7c R12: dffffc0000000000
> R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000000
> FS: 000055558634d500(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b30e63fff CR3: 0000000026b68000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1302
> do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
> __sys_setsockopt net/socket.c:2369 [inline]
> __do_sys_setsockopt net/socket.c:2375 [inline]
> __se_sys_setsockopt net/socket.c:2372 [inline]
> __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
> 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: 0033:0x7fea2bb8ebe9
> 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:00007ffc81c63348 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
> RAX: ffffffffffffffda RBX: 00007fea2bdc5fa0 RCX: 00007fea2bb8ebe9
> RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
> RBP: 00007fea2bc11e19 R08: 0000000000000048 R09: 0000000000000000
> R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007fea2bdc5fa0 R14: 00007fea2bdc5fa0 R15: 0000000000000005
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:sock_devmem_dontneed+0x3fd/0x960 net/core/sock.c:1112
> Code: 8b 44 24 40 44 8b 28 44 03 6c 24 14 48 8b 44 24 20 42 80 3c 20 00 74 08 4c 89 ff e8 4d eb c9 f8 4d 8b 3f 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 34 eb c9 f8 4d 8b 3f 4c 89 f8 48
> RSP: 0018:ffffc90001c4fac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11004ddcfe0
> RDX: ffff88801f6a8000 RSI: 0000000000000400 RDI: 0000000000000000
> RBP: ffffc90001c4fc50 R08: ffffc90001c4fbdf R09: 0000000000000000
> R10: ffffc90001c4fb60 R11: fffff52000389f7c R12: dffffc0000000000
> R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000000
> FS: 000055558634d500(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b30e63fff CR3: 0000000026b68000 CR4: 00000000000006f0
> ----------------
> Code disassembly (best guess):
> 0: 8b 44 24 40 mov 0x40(%rsp),%eax
> 4: 44 8b 28 mov (%rax),%r13d
> 7: 44 03 6c 24 14 add 0x14(%rsp),%r13d
> c: 48 8b 44 24 20 mov 0x20(%rsp),%rax
> 11: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
> 16: 74 08 je 0x20
> 18: 4c 89 ff mov %r15,%rdi
> 1b: e8 4d eb c9 f8 call 0xf8c9eb6d
> 20: 4d 8b 3f mov (%r15),%r15
> 23: 4c 89 f8 mov %r15,%rax
> 26: 48 c1 e8 03 shr $0x3,%rax
> * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
> 2f: 74 08 je 0x39
> 31: 4c 89 ff mov %r15,%rdi
> 34: e8 34 eb c9 f8 call 0xf8c9eb6d
> 39: 4d 8b 3f mov (%r15),%r15
> 3c: 4c 89 f8 mov %r15,%rax
> 3f: 48 rex.W
>
>
> ***
>
> 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:
> [almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com.
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
@ 2025-09-12 9:13 syzbot ci
2025-09-12 9:37 ` Aleksandr Nogikh
0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2025-09-12 9:13 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v2] net: devmem: improve cpu cost of RX token management
https://lore.kernel.org/all/20250911-scratch-bobbyeshleman-devmem-tcp-token-upstream-v2-0-c80d735bd453@meta.com
* [PATCH net-next v2 1/3] net: devmem: rename tx_vec to vec in dmabuf binding
* [PATCH net-next v2 2/3] net: devmem: use niov array for token management
* [PATCH net-next v2 3/3] net: ethtool: prevent user from breaking devmem single-binding rule
and found the following issue:
general protection fault in sock_devmem_dontneed
Full report is available here:
https://ci.syzbot.org/series/40b2252a-f8bb-4cec-bfc1-2ff8a3c55336
***
general protection fault in sock_devmem_dontneed
tree: net-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
base: 5adf6f2b9972dbb69f4dd11bae52ba251c64ecb7
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/2c30c608-f14f-4e6d-9772-cc5e129939fc/config
C repro: https://ci.syzbot.org/findings/c89c36f8-4666-47d0-bc39-35662a268e4d/c_repro
syz repro: https://ci.syzbot.org/findings/c89c36f8-4666-47d0-bc39-35662a268e4d/syz_repro
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 6028 Comm: syz.0.17 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:sock_devmem_dontneed+0x40b/0x910 net/core/sock.c:1112
Code: 8b 44 24 18 44 8b 20 44 03 64 24 14 48 8b 44 24 68 80 3c 18 00 74 08 4c 89 ef e8 f0 bb c9 f8 4d 8b 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 bb c9 f8 4d 8b 2f 4c 89 e8 48 c1
RSP: 0018:ffffc90002987ac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff11020d27e78
RDX: ffff88810a039cc0 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90002987c50 R08: ffffc90002987bdf R09: 0000000000000000
R10: ffffc90002987b60 R11: fffff52000530f7c R12: 0000000000000006
R13: ffff8881235cb710 R14: 0000000000000000 R15: 0000000000000000
FS: 000055555e866500(0000) GS:ffff8881a3c14000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31b63fff CR3: 0000000027a20000 CR4: 00000000000006f0
Call Trace:
<TASK>
sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1301
do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
__sys_setsockopt net/socket.c:2369 [inline]
__do_sys_setsockopt net/socket.c:2375 [inline]
__se_sys_setsockopt net/socket.c:2372 [inline]
__x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
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: 0033:0x7faf24f8eba9
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:00007ffc3eb96018 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007faf251d5fa0 RCX: 00007faf24f8eba9
RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007faf25011e19 R08: 0000000000000048 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faf251d5fa0 R14: 00007faf251d5fa0 R15: 0000000000000005
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sock_devmem_dontneed+0x40b/0x910 net/core/sock.c:1112
Code: 8b 44 24 18 44 8b 20 44 03 64 24 14 48 8b 44 24 68 80 3c 18 00 74 08 4c 89 ef e8 f0 bb c9 f8 4d 8b 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 bb c9 f8 4d 8b 2f 4c 89 e8 48 c1
RSP: 0018:ffffc90002987ac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff11020d27e78
RDX: ffff88810a039cc0 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90002987c50 R08: ffffc90002987bdf R09: 0000000000000000
R10: ffffc90002987b60 R11: fffff52000530f7c R12: 0000000000000006
R13: ffff8881235cb710 R14: 0000000000000000 R15: 0000000000000000
FS: 000055555e866500(0000) GS:ffff8881a3c14000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31b63fff CR3: 0000000027a20000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
0: 8b 44 24 18 mov 0x18(%rsp),%eax
4: 44 8b 20 mov (%rax),%r12d
7: 44 03 64 24 14 add 0x14(%rsp),%r12d
c: 48 8b 44 24 68 mov 0x68(%rsp),%rax
11: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
15: 74 08 je 0x1f
17: 4c 89 ef mov %r13,%rdi
1a: e8 f0 bb c9 f8 call 0xf8c9bc0f
1f: 4d 8b 7d 00 mov 0x0(%r13),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 d7 bb c9 f8 call 0xf8c9bc0f
38: 4d 8b 2f mov (%r15),%r13
3b: 4c 89 e8 mov %r13,%rax
3e: 48 rex.W
3f: c1 .byte 0xc1
***
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:
[almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
2025-09-12 9:13 syzbot ci
@ 2025-09-12 9:37 ` Aleksandr Nogikh
0 siblings, 0 replies; 7+ messages in thread
From: Aleksandr Nogikh @ 2025-09-12 9:37 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Fri, Sep 12, 2025 at 11:14 AM syzbot ci
<syzbot+ci6b3b9a0c3f217c63@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v2] net: devmem: improve cpu cost of RX token management
> https://lore.kernel.org/all/20250911-scratch-bobbyeshleman-devmem-tcp-token-upstream-v2-0-c80d735bd453@meta.com
> * [PATCH net-next v2 1/3] net: devmem: rename tx_vec to vec in dmabuf binding
> * [PATCH net-next v2 2/3] net: devmem: use niov array for token management
> * [PATCH net-next v2 3/3] net: ethtool: prevent user from breaking devmem single-binding rule
>
> and found the following issue:
> general protection fault in sock_devmem_dontneed
>
> Full report is available here:
> https://ci.syzbot.org/series/40b2252a-f8bb-4cec-bfc1-2ff8a3c55336
>
> ***
>
> general protection fault in sock_devmem_dontneed
>
> tree: net-next
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
> base: 5adf6f2b9972dbb69f4dd11bae52ba251c64ecb7
> arch: amd64
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> config: https://ci.syzbot.org/builds/2c30c608-f14f-4e6d-9772-cc5e129939fc/config
> C repro: https://ci.syzbot.org/findings/c89c36f8-4666-47d0-bc39-35662a268e4d/c_repro
> syz repro: https://ci.syzbot.org/findings/c89c36f8-4666-47d0-bc39-35662a268e4d/syz_repro
>
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 1 UID: 0 PID: 6028 Comm: syz.0.17 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:sock_devmem_dontneed+0x40b/0x910 net/core/sock.c:1112
> Code: 8b 44 24 18 44 8b 20 44 03 64 24 14 48 8b 44 24 68 80 3c 18 00 74 08 4c 89 ef e8 f0 bb c9 f8 4d 8b 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 bb c9 f8 4d 8b 2f 4c 89 e8 48 c1
> RSP: 0018:ffffc90002987ac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff11020d27e78
> RDX: ffff88810a039cc0 RSI: 0000000000000003 RDI: 0000000000000000
> RBP: ffffc90002987c50 R08: ffffc90002987bdf R09: 0000000000000000
> R10: ffffc90002987b60 R11: fffff52000530f7c R12: 0000000000000006
> R13: ffff8881235cb710 R14: 0000000000000000 R15: 0000000000000000
> FS: 000055555e866500(0000) GS:ffff8881a3c14000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b31b63fff CR3: 0000000027a20000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1301
> do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
> __sys_setsockopt net/socket.c:2369 [inline]
> __do_sys_setsockopt net/socket.c:2375 [inline]
> __se_sys_setsockopt net/socket.c:2372 [inline]
> __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
> 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: 0033:0x7faf24f8eba9
> 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:00007ffc3eb96018 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
> RAX: ffffffffffffffda RBX: 00007faf251d5fa0 RCX: 00007faf24f8eba9
> RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
> RBP: 00007faf25011e19 R08: 0000000000000048 R09: 0000000000000000
> R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007faf251d5fa0 R14: 00007faf251d5fa0 R15: 0000000000000005
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:sock_devmem_dontneed+0x40b/0x910 net/core/sock.c:1112
> Code: 8b 44 24 18 44 8b 20 44 03 64 24 14 48 8b 44 24 68 80 3c 18 00 74 08 4c 89 ef e8 f0 bb c9 f8 4d 8b 7d 00 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 d7 bb c9 f8 4d 8b 2f 4c 89 e8 48 c1
> RSP: 0018:ffffc90002987ac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff11020d27e78
> RDX: ffff88810a039cc0 RSI: 0000000000000003 RDI: 0000000000000000
> RBP: ffffc90002987c50 R08: ffffc90002987bdf R09: 0000000000000000
> R10: ffffc90002987b60 R11: fffff52000530f7c R12: 0000000000000006
> R13: ffff8881235cb710 R14: 0000000000000000 R15: 0000000000000000
> FS: 000055555e866500(0000) GS:ffff8881a3c14000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b31b63fff CR3: 0000000027a20000 CR4: 00000000000006f0
> ----------------
> Code disassembly (best guess):
> 0: 8b 44 24 18 mov 0x18(%rsp),%eax
> 4: 44 8b 20 mov (%rax),%r12d
> 7: 44 03 64 24 14 add 0x14(%rsp),%r12d
> c: 48 8b 44 24 68 mov 0x68(%rsp),%rax
> 11: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
> 15: 74 08 je 0x1f
> 17: 4c 89 ef mov %r13,%rdi
> 1a: e8 f0 bb c9 f8 call 0xf8c9bc0f
> 1f: 4d 8b 7d 00 mov 0x0(%r13),%r15
> 23: 4c 89 f8 mov %r15,%rax
> 26: 48 c1 e8 03 shr $0x3,%rax
> * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction
> 2e: 74 08 je 0x38
> 30: 4c 89 ff mov %r15,%rdi
> 33: e8 d7 bb c9 f8 call 0xf8c9bc0f
> 38: 4d 8b 2f mov (%r15),%r13
> 3b: 4c 89 e8 mov %r13,%rax
> 3e: 48 rex.W
> 3f: c1 .byte 0xc1
>
>
> ***
>
> 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:
> [almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com.
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
@ 2025-09-26 15:43 syzbot ci
0 siblings, 0 replies; 7+ messages in thread
From: syzbot ci @ 2025-09-26 15:43 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v3] net: devmem: improve cpu cost of RX token management
https://lore.kernel.org/all/20250926-scratch-bobbyeshleman-devmem-tcp-token-upstream-v3-0-084b46bda88f@meta.com
* [PATCH net-next v3 1/2] net: devmem: rename tx_vec to vec in dmabuf binding
* [PATCH net-next v3 2/2] net: devmem: use niov array for token management
and found the following issue:
kernel build error
Full report is available here:
https://ci.syzbot.org/series/e81af5ec-56ef-4ac8-b819-b7c693a9f977
***
kernel build error
tree: net
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
base: 4ff71af020ae59ae2d83b174646fc2ad9fcd4dc4
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/966856af-5973-4648-b78a-9571e11b4205/config
net/core/sock.c:1124:36: error: no member named 'sk_user_frags' in 'struct sock'
***
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:
[almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 7+ messages in thread
* [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
@ 2025-09-26 21:16 syzbot ci
2025-09-27 5:58 ` Aleksandr Nogikh
0 siblings, 1 reply; 7+ messages in thread
From: syzbot ci @ 2025-09-26 21:16 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v4] net: devmem: improve cpu cost of RX token management
https://lore.kernel.org/all/20250926-scratch-bobbyeshleman-devmem-tcp-token-upstream-v4-0-39156563c3ea@meta.com
* [PATCH net-next v4 1/2] net: devmem: rename tx_vec to vec in dmabuf binding
* [PATCH net-next v4 2/2] net: devmem: use niov array for token management
and found the following issue:
general protection fault in sock_devmem_dontneed
Full report is available here:
https://ci.syzbot.org/series/b8209bd4-e9f0-4c54-bad3-613e8431151b
***
general protection fault in sock_devmem_dontneed
tree: net-next
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
base: dc1dea796b197aba2c3cae25bfef45f4b3ad46fe
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/b4d90fd9-9fbe-4e17-8fc0-3d6603df09da/config
C repro: https://ci.syzbot.org/findings/ce81b3c3-3db8-4643-9731-cbe331c65fdb/c_repro
syz repro: https://ci.syzbot.org/findings/ce81b3c3-3db8-4643-9731-cbe331c65fdb/syz_repro
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 5996 Comm: syz.0.17 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:sock_devmem_dontneed+0x372/0x920 net/core/sock.c:1113
Code: 48 44 8b 20 44 89 74 24 54 45 01 f4 48 8b 44 24 60 42 80 3c 28 00 74 08 48 89 df e8 e8 5a c9 f8 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 cf 5a c9 f8 4d 8b 3e 4c 89 f8 48
RSP: 0018:ffffc90002a1fac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810a8ab710 RCX: 1ffff11023002f45
RDX: ffff88801b339cc0 RSI: 0000000000002000 RDI: 0000000000000000
RBP: ffffc90002a1fc50 R08: ffffc90002a1fbdf R09: 0000000000000000
R10: ffffc90002a1fb60 R11: fffff52000543f7c R12: 0000000000f07000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88810a8ab710
FS: 000055556f85a500(0000) GS:ffff8881a3c3d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000a2000 CR3: 0000000024516000 CR4: 00000000000006f0
Call Trace:
<TASK>
sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1304
do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
__sys_setsockopt net/socket.c:2369 [inline]
__do_sys_setsockopt net/socket.c:2375 [inline]
__se_sys_setsockopt net/socket.c:2372 [inline]
__x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
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: 0033:0x7fea0438ec29
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:00007ffd04a8f368 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fea045d5fa0 RCX: 00007fea0438ec29
RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fea04411e41 R08: 0000000000000010 R09: 0000000000000000
R10: 00002000000a2000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea045d5fa0 R14: 00007fea045d5fa0 R15: 0000000000000005
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sock_devmem_dontneed+0x372/0x920 net/core/sock.c:1113
Code: 48 44 8b 20 44 89 74 24 54 45 01 f4 48 8b 44 24 60 42 80 3c 28 00 74 08 48 89 df e8 e8 5a c9 f8 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 cf 5a c9 f8 4d 8b 3e 4c 89 f8 48
RSP: 0018:ffffc90002a1fac0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810a8ab710 RCX: 1ffff11023002f45
RDX: ffff88801b339cc0 RSI: 0000000000002000 RDI: 0000000000000000
RBP: ffffc90002a1fc50 R08: ffffc90002a1fbdf R09: 0000000000000000
R10: ffffc90002a1fb60 R11: fffff52000543f7c R12: 0000000000f07000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88810a8ab710
FS: 000055556f85a500(0000) GS:ffff8881a3c3d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000a2000 CR3: 0000000024516000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
0: 48 rex.W
1: 44 8b 20 mov (%rax),%r12d
4: 44 89 74 24 54 mov %r14d,0x54(%rsp)
9: 45 01 f4 add %r14d,%r12d
c: 48 8b 44 24 60 mov 0x60(%rsp),%rax
11: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
16: 74 08 je 0x20
18: 48 89 df mov %rbx,%rdi
1b: e8 e8 5a c9 f8 call 0xf8c95b08
20: 4c 8b 33 mov (%rbx),%r14
23: 4c 89 f0 mov %r14,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 cf 5a c9 f8 call 0xf8c95b08
39: 4d 8b 3e mov (%r14),%r15
3c: 4c 89 f8 mov %r15,%rax
3f: 48 rex.W
***
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:
[almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [moderation/CI] Re: net: devmem: improve cpu cost of RX token management
2025-09-26 21:16 [moderation/CI] Re: net: devmem: improve cpu cost of RX token management syzbot ci
@ 2025-09-27 5:58 ` Aleksandr Nogikh
0 siblings, 0 replies; 7+ messages in thread
From: Aleksandr Nogikh @ 2025-09-27 5:58 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Fri, Sep 26, 2025 at 11:16 PM syzbot ci
<syzbot+ci91aff55081e4f959@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v4] net: devmem: improve cpu cost of RX token management
> https://lore.kernel.org/all/20250926-scratch-bobbyeshleman-devmem-tcp-token-upstream-v4-0-39156563c3ea@meta.com
> * [PATCH net-next v4 1/2] net: devmem: rename tx_vec to vec in dmabuf binding
> * [PATCH net-next v4 2/2] net: devmem: use niov array for token management
>
> and found the following issue:
> general protection fault in sock_devmem_dontneed
>
> Full report is available here:
> https://ci.syzbot.org/series/b8209bd4-e9f0-4c54-bad3-613e8431151b
>
> ***
>
> general protection fault in sock_devmem_dontneed
>
> tree: net-next
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
> base: dc1dea796b197aba2c3cae25bfef45f4b3ad46fe
> arch: amd64
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> config: https://ci.syzbot.org/builds/b4d90fd9-9fbe-4e17-8fc0-3d6603df09da/config
> C repro: https://ci.syzbot.org/findings/ce81b3c3-3db8-4643-9731-cbe331c65fdb/c_repro
> syz repro: https://ci.syzbot.org/findings/ce81b3c3-3db8-4643-9731-cbe331c65fdb/syz_repro
>
> Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 1 UID: 0 PID: 5996 Comm: syz.0.17 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:sock_devmem_dontneed+0x372/0x920 net/core/sock.c:1113
> Code: 48 44 8b 20 44 89 74 24 54 45 01 f4 48 8b 44 24 60 42 80 3c 28 00 74 08 48 89 df e8 e8 5a c9 f8 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 cf 5a c9 f8 4d 8b 3e 4c 89 f8 48
> RSP: 0018:ffffc90002a1fac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff88810a8ab710 RCX: 1ffff11023002f45
> RDX: ffff88801b339cc0 RSI: 0000000000002000 RDI: 0000000000000000
> RBP: ffffc90002a1fc50 R08: ffffc90002a1fbdf R09: 0000000000000000
> R10: ffffc90002a1fb60 R11: fffff52000543f7c R12: 0000000000f07000
> R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88810a8ab710
> FS: 000055556f85a500(0000) GS:ffff8881a3c3d000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00002000000a2000 CR3: 0000000024516000 CR4: 00000000000006f0
> Call Trace:
> <TASK>
> sk_setsockopt+0x682/0x2dc0 net/core/sock.c:1304
> do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2340
> __sys_setsockopt net/socket.c:2369 [inline]
> __do_sys_setsockopt net/socket.c:2375 [inline]
> __se_sys_setsockopt net/socket.c:2372 [inline]
> __x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2372
> 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: 0033:0x7fea0438ec29
> 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:00007ffd04a8f368 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
> RAX: ffffffffffffffda RBX: 00007fea045d5fa0 RCX: 00007fea0438ec29
> RDX: 0000000000000050 RSI: 0000000000000001 RDI: 0000000000000003
> RBP: 00007fea04411e41 R08: 0000000000000010 R09: 0000000000000000
> R10: 00002000000a2000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007fea045d5fa0 R14: 00007fea045d5fa0 R15: 0000000000000005
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:sock_devmem_dontneed+0x372/0x920 net/core/sock.c:1113
> Code: 48 44 8b 20 44 89 74 24 54 45 01 f4 48 8b 44 24 60 42 80 3c 28 00 74 08 48 89 df e8 e8 5a c9 f8 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 cf 5a c9 f8 4d 8b 3e 4c 89 f8 48
> RSP: 0018:ffffc90002a1fac0 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff88810a8ab710 RCX: 1ffff11023002f45
> RDX: ffff88801b339cc0 RSI: 0000000000002000 RDI: 0000000000000000
> RBP: ffffc90002a1fc50 R08: ffffc90002a1fbdf R09: 0000000000000000
> R10: ffffc90002a1fb60 R11: fffff52000543f7c R12: 0000000000f07000
> R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88810a8ab710
> FS: 000055556f85a500(0000) GS:ffff8881a3c3d000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00002000000a2000 CR3: 0000000024516000 CR4: 00000000000006f0
> ----------------
> Code disassembly (best guess):
> 0: 48 rex.W
> 1: 44 8b 20 mov (%rax),%r12d
> 4: 44 89 74 24 54 mov %r14d,0x54(%rsp)
> 9: 45 01 f4 add %r14d,%r12d
> c: 48 8b 44 24 60 mov 0x60(%rsp),%rax
> 11: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
> 16: 74 08 je 0x20
> 18: 48 89 df mov %rbx,%rdi
> 1b: e8 e8 5a c9 f8 call 0xf8c95b08
> 20: 4c 8b 33 mov (%rbx),%r14
> 23: 4c 89 f0 mov %r14,%rax
> 26: 48 c1 e8 03 shr $0x3,%rax
> * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
> 2f: 74 08 je 0x39
> 31: 4c 89 f7 mov %r14,%rdi
> 34: e8 cf 5a c9 f8 call 0xf8c95b08
> 39: 4d 8b 3e mov (%r14),%r15
> 3c: 4c 89 f8 mov %r15,%rax
> 3f: 48 rex.W
>
>
> ***
>
> 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:
> [almasrymina@google.com bobbyeshleman@gmail.com bobbyeshleman@meta.com davem@davemloft.net dsahern@kernel.org edumazet@google.com horms@kernel.org kuba@kernel.org kuniyu@google.com linux-kernel@vger.kernel.org ncardwell@google.com netdev@vger.kernel.org pabeni@redhat.com sdf@fomichev.me willemb@google.com]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> --
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^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2025-09-27 5:58 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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2025-09-26 21:16 [moderation/CI] Re: net: devmem: improve cpu cost of RX token management syzbot ci
2025-09-27 5:58 ` Aleksandr Nogikh
-- strict thread matches above, loose matches on Subject: below --
2025-09-26 15:43 syzbot ci
2025-09-12 9:13 syzbot ci
2025-09-12 9:37 ` Aleksandr Nogikh
2025-09-03 16:14 syzbot ci
2025-09-03 17:43 ` Aleksandr Nogikh
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