general protection fault in bpf_int_jit_compile

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: ea4dabbb4ad7 Add linux-next specific files for 20230202
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17c35473480000
kernel config: https://syzkaller.appspot.com/x/.config?x=e72b2255c35d4f1d
dashboard link: https://syzkaller.appspot.com/bug?extid=e6036f5d97dac01d60b3
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [and...@kernel.org a...@kernel.org b...@alien8.de b...@vger.kernel.org dan...@iogearbox.net dave....@linux.intel.com da...@davemloft.net dsa...@kernel.org hao...@google.com h...@zytor.com john.fa...@gmail.com jo...@kernel.org kps...@kernel.org linux-...@vger.kernel.org ll...@lists.linux.dev marti...@linux.dev mi...@redhat.com nat...@kernel.org ndesau...@google.com net...@vger.kernel.org s...@google.com so...@kernel.org tg...@linutronix.de tr...@redhat.com x...@kernel.org y...@fb.com yosh...@linux-ipv6.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3f528ea7aadc/disk-ea4dabbb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3cfef520b19c/vmlinux-ea4dabbb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4cb33ff30fd7/bzImage-ea4dabbb.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6036f...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000000099: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000004c8-0x00000000000004cf]
CPU: 1 PID: 15691 Comm: syz-executor.1 Not tainted 6.2.0-rc6-next-20230202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:bpf_int_jit_compile+0x58a/0x15a0 arch/x86/net/bpf_jit_comp.c:2566
Code: 00 0f 85 19 0c 00 00 48 8b 04 24 4d 01 f4 48 b9 00 00 00 00 00 fc ff df 4c 8b 78 38 49 8d bf c8 04 00 00 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 14 0c 00 00 4d 89 a7 c8 04 00 00 e9 1e fe ff ff
RSP: 0018:ffffc9001158f968 EFLAGS: 00010206
RAX: 0000000000000099 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: ffffffff814ad1e1 RDI: 00000000000004c8
RBP: 000000000000001f R08: 0000000000000004 R09: 00000000e37eec68
R10: 0000000000000018 R11: 0000000000000000 R12: ffffffffa000066c
R13: 0000000000000000 R14: ffffffffa000064c R15: 0000000000000000
FS: 00007f20c105b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20c02d9210 CR3: 000000002b964000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bpf_prog_select_runtime+0x2de/0x4b0 kernel/bpf/core.c:2198
bpf_prog_load+0x170d/0x21d0 kernel/bpf/syscall.c:2621
__sys_bpf+0x1435/0x5100 kernel/bpf/syscall.c:4977
__do_sys_bpf kernel/bpf/syscall.c:5081 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5079 [inline]
__x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5079
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f20c028c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f20c105b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f20c03abf80 RCX: 00007f20c028c0c9
RDX: 0000000000000080 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007f20c02e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff99175b3f R14: 00007f20c105b300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bpf_int_jit_compile+0x58a/0x15a0 arch/x86/net/bpf_jit_comp.c:2566
Code: 00 0f 85 19 0c 00 00 48 8b 04 24 4d 01 f4 48 b9 00 00 00 00 00 fc ff df 4c 8b 78 38 49 8d bf c8 04 00 00 48 89 f8 48 c1 e8 03 <80> 3c 08 00 0f 85 14 0c 00 00 4d 89 a7 c8 04 00 00 e9 1e fe ff ff
RSP: 0018:ffffc9001158f968 EFLAGS: 00010206
RAX: 0000000000000099 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000040000 RSI: ffffffff814ad1e1 RDI: 00000000000004c8
RBP: 000000000000001f R08: 0000000000000004 R09: 00000000e37eec68
R10: 0000000000000018 R11: 0000000000000000 R12: ffffffffa000066c
R13: 0000000000000000 R14: ffffffffa000064c R15: 0000000000000000
FS: 00007f20c105b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3272d000 CR3: 000000002b964000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 0f add %cl,(%rdi)
2: 85 19 test %ebx,(%rcx)
4: 0c 00 or $0x0,%al
6: 00 48 8b add %cl,-0x75(%rax)
9: 04 24 add $0x24,%al
b: 4d 01 f4 add %r14,%r12
e: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
15: fc ff df
18: 4c 8b 78 38 mov 0x38(%rax),%r15
1c: 49 8d bf c8 04 00 00 lea 0x4c8(%r15),%rdi
23: 48 89 f8 mov %rdi,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 0f 85 14 0c 00 00 jne 0xc48
34: 4d 89 a7 c8 04 00 00 mov %r12,0x4c8(%r15)
3b: e9 1e fe ff ff jmpq 0xfffffe5e


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.