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Message-ID: <000000000000516d5905fd0d12ec@google.com>
Date: Thu, 01 Jun 2023 01:17:47 -0700
From: syzbot <syzbot+8252ac3e16614ea0ea04@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
daniel@...earbox.net, davem@...emloft.net, edumazet@...gle.com,
jakub@...udflare.com, john.fastabend@...il.com, kuba@...nel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] [bpf?] general protection fault in sk_psock_verdict_data_ready
Hello,
syzbot found the following issue on:
HEAD commit: 4781e965e655 net: phy: broadcom: Register dummy IRQ handler
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=117277de280000
kernel config: https://syzkaller.appspot.com/x/.config?x=5335204dcdecfda
dashboard link: https://syzkaller.appspot.com/bug?extid=8252ac3e16614ea0ea04
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7a839a1e1e20/disk-4781e965.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ceb0a7674b18/vmlinux-4781e965.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f3e82748f103/bzImage-4781e965.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8252ac3e16614ea0ea04@...kaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc000000005c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000002e0-0x00000000000002e7]
CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.4.0-rc3-syzkaller-00588-g4781e965e655 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:sk_psock_verdict_data_ready+0x19f/0x3c0 net/core/skmsg.c:1213
Code: 4c 89 e6 e8 63 70 5e f9 4d 85 e4 75 75 e8 19 74 5e f9 48 8d bb e0 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 07 02 00 00 48 89 ef ff 93 e0 02 00 00 e8 29 fd
RSP: 0018:ffffc90000147688 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 000000000000005c RSI: ffffffff8825ceb7 RDI: 00000000000002e0
RBP: ffff888076518c40 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000008000 R15: ffff888076518c40
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f901375bab0 CR3: 000000004bf26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tcp_data_ready+0x10a/0x520 net/ipv4/tcp_input.c:5006
tcp_data_queue+0x25d3/0x4c50 net/ipv4/tcp_input.c:5080
tcp_rcv_established+0x829/0x1f90 net/ipv4/tcp_input.c:6019
tcp_v4_do_rcv+0x65a/0x9c0 net/ipv4/tcp_ipv4.c:1726
tcp_v4_rcv+0x2cbf/0x3340 net/ipv4/tcp_ipv4.c:2148
ip_protocol_deliver_rcu+0x9f/0x480 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2ec/0x520 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:303 [inline]
NF_HOOK include/linux/netfilter.h:297 [inline]
ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:468 [inline]
ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449
NF_HOOK include/linux/netfilter.h:303 [inline]
NF_HOOK include/linux/netfilter.h:297 [inline]
ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491
__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605
process_backlog+0x101/0x670 net/core/dev.c:5933
__napi_poll+0xb7/0x6f0 net/core/dev.c:6499
napi_poll net/core/dev.c:6566 [inline]
net_rx_action+0x8a9/0xcb0 net/core/dev.c:6699
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
run_ksoftirqd kernel/softirq.c:939 [inline]
run_ksoftirqd+0x31/0x60 kernel/softirq.c:931
smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sk_psock_verdict_data_ready+0x19f/0x3c0 net/core/skmsg.c:1213
Code: 4c 89 e6 e8 63 70 5e f9 4d 85 e4 75 75 e8 19 74 5e f9 48 8d bb e0 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 07 02 00 00 48 89 ef ff 93 e0 02 00 00 e8 29 fd
RSP: 0018:ffffc90000147688 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 000000000000005c RSI: ffffffff8825ceb7 RDI: 00000000000002e0
RBP: ffff888076518c40 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000008000 R15: ffff888076518c40
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f901375bab0 CR3: 000000004bf26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 4c 89 e6 mov %r12,%rsi
3: e8 63 70 5e f9 callq 0xf95e706b
8: 4d 85 e4 test %r12,%r12
b: 75 75 jne 0x82
d: e8 19 74 5e f9 callq 0xf95e742b
12: 48 8d bb e0 02 00 00 lea 0x2e0(%rbx),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 07 02 00 00 jne 0x23b
34: 48 89 ef mov %rbp,%rdi
37: ff 93 e0 02 00 00 callq *0x2e0(%rbx)
3d: e8 .byte 0xe8
3e: 29 fd sub %edi,%ebp
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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