From: syzbot <syzbot+af9492708df9797198d6@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, davem@davemloft.net, eadavis@qq.com,
eddyz87@gmail.com, haoluo@google.com, hawk@kernel.org,
john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org,
kuba@kernel.org, linux-kernel@vger.kernel.org,
martin.lau@linux.dev, netdev@vger.kernel.org, sdf@google.com,
song@kernel.org, syzkaller-bugs@googlegroups.com,
toke@kernel.org, yonghong.song@linux.dev
Subject: Re: [syzbot] [bpf?] [net?] general protection fault in dev_map_enqueue
Date: Mon, 08 Apr 2024 15:03:03 -0700 [thread overview]
Message-ID: <0000000000003a924406159cf8ee@google.com> (raw)
In-Reply-To: <877ch7hnxf.fsf@toke.dk>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
general protection fault in dev_map_enqueue
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 8787 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-05236-g443574b03387-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:dev_map_enqueue+0x31/0x3e0 kernel/bpf/devmap.c:539
Code: 41 56 41 55 41 54 53 48 83 ec 18 49 89 d4 49 89 f5 48 89 fd 49 be 00 00 00 00 00 fc ff df e8 a6 42 d8 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 10 8a 3b 00 4c 8b 7d 00 48 83 c5
RSP: 0018:ffffc9000bc1f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888011815a00
RDX: 0000000000000000 RSI: ffff88802bed7070 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000005 R09: ffffffff894ff90e
R10: 0000000000000004 R11: ffff888011815a00 R12: ffff888022f4a000
R13: ffff88802bed7070 R14: dffffc0000000000 R15: ffff8880b943c088
FS: 00007f0b6b2916c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b6a5a80c0 CR3: 000000002dad2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__xdp_do_redirect_frame net/core/filter.c:4384 [inline]
xdp_do_redirect_frame+0x20d/0x4d0 net/core/filter.c:4438
xdp_test_run_batch net/bpf/test_run.c:337 [inline]
bpf_test_run_xdp_live+0xf0b/0x1f10 net/bpf/test_run.c:385
bpf_prog_test_run_xdp+0x813/0x11b0 net/bpf/test_run.c:1268
bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4240
__sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5649
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f0b6a47dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0b6b2910c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0b6a5abf80 RCX: 00007f0b6a47dda9
RDX: 0000000000000050 RSI: 0000000020000240 RDI: 000000000000000a
RBP: 00007f0b6a4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0b6a5abf80 R15: 00007ffe8c70ed58
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dev_map_enqueue+0x31/0x3e0 kernel/bpf/devmap.c:539
Code: 41 56 41 55 41 54 53 48 83 ec 18 49 89 d4 49 89 f5 48 89 fd 49 be 00 00 00 00 00 fc ff df e8 a6 42 d8 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 10 8a 3b 00 4c 8b 7d 00 48 83 c5
RSP: 0018:ffffc9000bc1f688 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888011815a00
RDX: 0000000000000000 RSI: ffff88802bed7070 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000005 R09: ffffffff894ff90e
R10: 0000000000000004 R11: ffff888011815a00 R12: ffff888022f4a000
R13: ffff88802bed7070 R14: dffffc0000000000 R15: ffff8880b943c088
FS: 00007f0b6b2916c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b6a5a80c0 CR3: 000000002dad2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 41 56 push %r14
2: 41 55 push %r13
4: 41 54 push %r12
6: 53 push %rbx
7: 48 83 ec 18 sub $0x18,%rsp
b: 49 89 d4 mov %rdx,%r12
e: 49 89 f5 mov %rsi,%r13
11: 48 89 fd mov %rdi,%rbp
14: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
1b: fc ff df
1e: e8 a6 42 d8 ff call 0xffd842c9
23: 48 89 e8 mov %rbp,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 ef mov %rbp,%rdi
34: e8 10 8a 3b 00 call 0x3b8a49
39: 4c 8b 7d 00 mov 0x0(%rbp),%r15
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c5 .byte 0xc5
Tested on:
commit: 443574b0 riscv, bpf: Fix kfunc parameters incompatibil..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
console output: https://syzkaller.appspot.com/x/log.txt?x=11ac5323180000
kernel config: https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
dashboard link: https://syzkaller.appspot.com/bug?extid=af9492708df9797198d6
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=154653d3180000
next prev parent reply other threads:[~2024-04-08 22:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-26 19:00 [syzbot] [bpf?] [net?] general protection fault in dev_map_enqueue syzbot
2024-03-27 8:10 ` syzbot
2024-03-27 15:19 ` Alexei Starovoitov
2024-03-28 8:58 ` Jesper Dangaard Brouer
2024-03-28 20:39 ` Toke Høiland-Jørgensen
2024-03-31 9:08 ` [PATCH] bpf: fix null ptr deref " Edward Adam Davis
2024-04-01 11:00 ` Jesper Dangaard Brouer
2024-04-02 3:03 ` Edward Adam Davis
2024-04-04 11:03 ` Jesper Dangaard Brouer
2024-04-04 21:02 ` Toke Høiland-Jørgensen
2024-04-05 3:55 ` [syzbot] [bpf?] [net?] general protection fault " syzbot
2024-04-08 15:30 ` Toke Høiland-Jørgensen
2024-04-08 22:03 ` syzbot [this message]
2024-04-16 20:55 ` Toke Høiland-Jørgensen
2024-04-17 14:49 ` syzbot
2024-04-17 19:18 ` Toke Høiland-Jørgensen
2024-04-18 2:51 ` syzbot
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