* [syzbot] [bpf?] general protection fault in bpf_struct_ops_find_value
@ 2024-01-25 17:53 syzbot
2024-01-25 18:09 ` Martin KaFai Lau
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2024-01-25 17:53 UTC (permalink / raw)
To: andrii, ast, bpf, daniel, haoluo, john.fastabend, jolsa, kpsingh,
linux-kernel, martin.lau, martin.lau, netdev, sdf, song,
syzkaller-bugs, thinker.li, yonghong.song
Hello,
syzbot found the following issue on:
HEAD commit: d47b9f68d289 libbpf: Correct bpf_core_read.h comment wrt b..
git tree: bpf-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=11479fe7e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=719e6acaf392d56b
dashboard link: https://syzkaller.appspot.com/bug?extid=88f0aafe5f950d7489d7
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ea6be3e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bc199be80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1a9b4a5622fb/disk-d47b9f68.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/dd68baeac4fd/vmlinux-d47b9f68.xz
kernel image: https://storage.googleapis.com/syzbot-assets/811ba9dc9ddf/bzImage-d47b9f68.xz
The issue was bisected to:
commit fcc2c1fb0651477c8ed78a3a293c175ccd70697a
Author: Kui-Feng Lee <thinker.li@gmail.com>
Date: Fri Jan 19 22:49:59 2024 +0000
bpf: pass attached BTF to the bpf_struct_ops subsystem
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=106a04c3e80000
final oops: https://syzkaller.appspot.com/x/report.txt?x=126a04c3e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=146a04c3e80000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+88f0aafe5f950d7489d7@syzkaller.appspotmail.com
Fixes: fcc2c1fb0651 ("bpf: pass attached BTF to the bpf_struct_ops subsystem")
general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]
CPU: 0 PID: 5058 Comm: syz-executor257 Not tainted 6.7.0-syzkaller-12348-gd47b9f68d289 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bpf_struct_ops_map_alloc+0x12f/0x5d0 kernel/bpf/bpf_struct_ops.c:674
map_create+0x548/0x1b90 kernel/bpf/syscall.c:1237
__sys_bpf+0xa32/0x4a00 kernel/bpf/syscall.c:5445
__do_sys_bpf kernel/bpf/syscall.c:5567 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5565 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5565
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f9f205ef2e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffa4ce4088 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fffa4ce4268 RCX: 00007f9f205ef2e9
RDX: 0000000000000048 RSI: 00000000200004c0 RDI: 0000000000000000
RBP: 00007f9f20662610 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffa4ce4258 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 45 85 e4 test %r12d,%r12d
3: 0f 84 d7 00 00 00 je 0xe0
9: e8 ff ee dd ff call 0xffddef0d
e: 48 8d bb 88 00 00 00 lea 0x88(%rbx),%rdi
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
* 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2a: 0f 85 dc 00 00 00 jne 0x10c
30: 48 8b 9b 88 00 00 00 mov 0x88(%rbx),%rbx
37: 48 85 db test %rbx,%rbx
3a: 0f .byte 0xf
3b: 84 .byte 0x84
---
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@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
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.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [bpf?] general protection fault in bpf_struct_ops_find_value
2024-01-25 17:53 [syzbot] [bpf?] general protection fault in bpf_struct_ops_find_value syzbot
@ 2024-01-25 18:09 ` Martin KaFai Lau
2024-01-25 18:17 ` Kui-Feng Lee
0 siblings, 1 reply; 3+ messages in thread
From: Martin KaFai Lau @ 2024-01-25 18:09 UTC (permalink / raw)
To: Kui-Feng Lee
Cc: syzbot, andrii, ast, bpf, daniel, haoluo, john.fastabend, jolsa,
kpsingh, linux-kernel, martin.lau, netdev, sdf, song,
syzkaller-bugs, thinker.li, yonghong.song
On 1/25/24 9:53 AM, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: d47b9f68d289 libbpf: Correct bpf_core_read.h comment wrt b..
> git tree: bpf-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=11479fe7e80000
> kernel config: https://syzkaller.appspot.com/x/.config?x=719e6acaf392d56b
> dashboard link: https://syzkaller.appspot.com/bug?extid=88f0aafe5f950d7489d7
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ea6be3e80000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bc199be80000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/1a9b4a5622fb/disk-d47b9f68.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/dd68baeac4fd/vmlinux-d47b9f68.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/811ba9dc9ddf/bzImage-d47b9f68.xz
>
> The issue was bisected to:
>
> commit fcc2c1fb0651477c8ed78a3a293c175ccd70697a
> Author: Kui-Feng Lee <thinker.li@gmail.com>
> Date: Fri Jan 19 22:49:59 2024 +0000
>
> bpf: pass attached BTF to the bpf_struct_ops subsystem
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=106a04c3e80000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=126a04c3e80000
> console output: https://syzkaller.appspot.com/x/log.txt?x=146a04c3e80000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+88f0aafe5f950d7489d7@syzkaller.appspotmail.com
> Fixes: fcc2c1fb0651 ("bpf: pass attached BTF to the bpf_struct_ops subsystem")
>
> general protection fault, probably for non-canonical address 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN
> KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]
> CPU: 0 PID: 5058 Comm: syz-executor257 Not tainted 6.7.0-syzkaller-12348-gd47b9f68d289 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
> RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
> Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
> RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
> RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
> RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
> R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
> R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
> FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> bpf_struct_ops_map_alloc+0x12f/0x5d0 kernel/bpf/bpf_struct_ops.c:674
The check should be IS_ERR_"OR_NULL"(btf). Kui-Feng, please take a look. Thanks.
> map_create+0x548/0x1b90 kernel/bpf/syscall.c:1237
> __sys_bpf+0xa32/0x4a00 kernel/bpf/syscall.c:5445
> __do_sys_bpf kernel/bpf/syscall.c:5567 [inline]
> __se_sys_bpf kernel/bpf/syscall.c:5565 [inline]
> __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5565
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x63/0x6b
> RIP: 0033:0x7f9f205ef2e9
> Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fffa4ce4088 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
> RAX: ffffffffffffffda RBX: 00007fffa4ce4268 RCX: 00007f9f205ef2e9
> RDX: 0000000000000048 RSI: 00000000200004c0 RDI: 0000000000000000
> RBP: 00007f9f20662610 R08: 0000000000000000 R09: 0000000000000000
> R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
> R13: 00007fffa4ce4258 R14: 0000000000000001 R15: 0000000000000001
> </TASK>
> Modules linked in:
> ---[ end trace 0000000000000000 ]---
> RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
> Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
> RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
> RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
> RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
> R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
> R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
> FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> ----------------
> Code disassembly (best guess), 4 bytes skipped:
> 0: 45 85 e4 test %r12d,%r12d
> 3: 0f 84 d7 00 00 00 je 0xe0
> 9: e8 ff ee dd ff call 0xffddef0d
> e: 48 8d bb 88 00 00 00 lea 0x88(%rbx),%rdi
> 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
> 1c: fc ff df
> 1f: 48 89 fa mov %rdi,%rdx
> 22: 48 c1 ea 03 shr $0x3,%rdx
> * 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
> 2a: 0f 85 dc 00 00 00 jne 0x10c
> 30: 48 8b 9b 88 00 00 00 mov 0x88(%rbx),%rbx
> 37: 48 85 db test %rbx,%rbx
> 3a: 0f .byte 0xf
> 3b: 84 .byte 0x84
>
>
> ---
> 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@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
>
> 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.
>
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
>
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
>
> If you want to undo deduplication, reply with:
> #syz undup
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [bpf?] general protection fault in bpf_struct_ops_find_value
2024-01-25 18:09 ` Martin KaFai Lau
@ 2024-01-25 18:17 ` Kui-Feng Lee
0 siblings, 0 replies; 3+ messages in thread
From: Kui-Feng Lee @ 2024-01-25 18:17 UTC (permalink / raw)
To: Martin KaFai Lau
Cc: syzbot, andrii, ast, bpf, daniel, haoluo, john.fastabend, jolsa,
kpsingh, linux-kernel, martin.lau, netdev, sdf, song,
syzkaller-bugs, thinker.li, yonghong.song
On 1/25/24 10:09, Martin KaFai Lau wrote:
> On 1/25/24 9:53 AM, syzbot wrote:
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit: d47b9f68d289 libbpf: Correct bpf_core_read.h comment
>> wrt b..
>> git tree: bpf-next
>> console+strace: https://syzkaller.appspot.com/x/log.txt?x=11479fe7e80000
>> kernel config:
>> https://syzkaller.appspot.com/x/.config?x=719e6acaf392d56b
>> dashboard link:
>> https://syzkaller.appspot.com/bug?extid=88f0aafe5f950d7489d7
>> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils
>> for Debian) 2.40
>> syz repro:
>> https://syzkaller.appspot.com/x/repro.syz?x=14ea6be3e80000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bc199be80000
>>
>> Downloadable assets:
>> disk image:
>> https://storage.googleapis.com/syzbot-assets/1a9b4a5622fb/disk-d47b9f68.raw.xz
>> vmlinux:
>> https://storage.googleapis.com/syzbot-assets/dd68baeac4fd/vmlinux-d47b9f68.xz
>> kernel image:
>> https://storage.googleapis.com/syzbot-assets/811ba9dc9ddf/bzImage-d47b9f68.xz
>>
>> The issue was bisected to:
>>
>> commit fcc2c1fb0651477c8ed78a3a293c175ccd70697a
>> Author: Kui-Feng Lee <thinker.li@gmail.com>
>> Date: Fri Jan 19 22:49:59 2024 +0000
>>
>> bpf: pass attached BTF to the bpf_struct_ops subsystem
>>
>> bisection log:
>> https://syzkaller.appspot.com/x/bisect.txt?x=106a04c3e80000
>> final oops:
>> https://syzkaller.appspot.com/x/report.txt?x=126a04c3e80000
>> console output: https://syzkaller.appspot.com/x/log.txt?x=146a04c3e80000
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the
>> commit:
>> Reported-by: syzbot+88f0aafe5f950d7489d7@syzkaller.appspotmail.com
>> Fixes: fcc2c1fb0651 ("bpf: pass attached BTF to the bpf_struct_ops
>> subsystem")
>>
>> general protection fault, probably for non-canonical address
>> 0xdffffc0000000011: 0000 [#1] PREEMPT SMP KASAN
>> KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]
>> CPU: 0 PID: 5058 Comm: syz-executor257 Not tainted
>> 6.7.0-syzkaller-12348-gd47b9f68d289 #0
>> Hardware name: Google Google Compute Engine/Google Compute Engine,
>> BIOS Google 11/17/2023
>> RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
>> Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb
>> 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
>> RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
>> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
>> RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
>> RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
>> R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
>> R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
>> FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000)
>> knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> Call Trace:
>> <TASK>
>> bpf_struct_ops_map_alloc+0x12f/0x5d0 kernel/bpf/bpf_struct_ops.c:674
>
> The check should be IS_ERR_"OR_NULL"(btf). Kui-Feng, please take a
> look. Thanks.
Sure!
>
>> map_create+0x548/0x1b90 kernel/bpf/syscall.c:1237
>> __sys_bpf+0xa32/0x4a00 kernel/bpf/syscall.c:5445
>> __do_sys_bpf kernel/bpf/syscall.c:5567 [inline]
>> __se_sys_bpf kernel/bpf/syscall.c:5565 [inline]
>> __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5565
>> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>> do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
>> entry_SYSCALL_64_after_hwframe+0x63/0x6b
>> RIP: 0033:0x7f9f205ef2e9
>> Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
>> RSP: 002b:00007fffa4ce4088 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
>> RAX: ffffffffffffffda RBX: 00007fffa4ce4268 RCX: 00007f9f205ef2e9
>> RDX: 0000000000000048 RSI: 00000000200004c0 RDI: 0000000000000000
>> RBP: 00007f9f20662610 R08: 0000000000000000 R09: 0000000000000000
>> R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
>> R13: 00007fffa4ce4258 R14: 0000000000000001 R15: 0000000000000001
>> </TASK>
>> Modules linked in:
>> ---[ end trace 0000000000000000 ]---
>> RIP: 0010:bpf_struct_ops_find_value+0x49/0x140 kernel/bpf/btf.c:8763
>> Code: 7d ea dd ff 45 85 e4 0f 84 d7 00 00 00 e8 ff ee dd ff 48 8d bb
>> 88 00 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 dc 00 00 00 48 8b 9b 88 00 00 00 48 85 db 0f 84
>> RSP: 0018:ffffc90003bb7b20 EFLAGS: 00010206
>> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81aa3283
>> RDX: 0000000000000011 RSI: ffffffff81aa3291 RDI: 0000000000000088
>> RBP: ffffc90003bb7dd0 R08: 0000000000000005 R09: 0000000000000000
>> R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000002
>> R13: 000000000000001a R14: ffffffff8ad6bca0 R15: ffffc90003bb7e04
>> FS: 0000555556ed2380(0000) GS:ffff8880b9800000(0000)
>> knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> CR2: 000000000160d398 CR3: 000000007809c000 CR4: 00000000003506f0
>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> ----------------
>> Code disassembly (best guess), 4 bytes skipped:
>> 0: 45 85 e4 test %r12d,%r12d
>> 3: 0f 84 d7 00 00 00 je 0xe0
>> 9: e8 ff ee dd ff call 0xffddef0d
>> e: 48 8d bb 88 00 00 00 lea 0x88(%rbx),%rdi
>> 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
>> 1c: fc ff df
>> 1f: 48 89 fa mov %rdi,%rdx
>> 22: 48 c1 ea 03 shr $0x3,%rdx
>> * 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <--
>> trapping instruction
>> 2a: 0f 85 dc 00 00 00 jne 0x10c
>> 30: 48 8b 9b 88 00 00 00 mov 0x88(%rbx),%rbx
>> 37: 48 85 db test %rbx,%rbx
>> 3a: 0f .byte 0xf
>> 3b: 84 .byte 0x84
>>
>>
>> ---
>> 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@googlegroups.com.
>>
>> syzbot will keep track of this issue. See:
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>> For information about bisection process see:
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>>
>> If the report is already addressed, let syzbot know by replying with:
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>>
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>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-01-25 18:17 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-01-25 17:53 [syzbot] [bpf?] general protection fault in bpf_struct_ops_find_value syzbot
2024-01-25 18:09 ` Martin KaFai Lau
2024-01-25 18:17 ` Kui-Feng Lee
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