syzbot


general protection fault in bpf_int_jit_compile

Status: auto-obsoleted due to no activity on 2023/04/03 20:27
Subsystems: bpf net
[Documentation on labels]
Reported-by: syzbot+e6036f5d97dac01d60b3@syzkaller.appspotmail.com
First crash: 441d, last: 441d

Sample crash report:
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

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/02 20:26 linux-next ea4dabbb4ad7 16d19e30 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in bpf_int_jit_compile
* Struck through repros no longer work on HEAD.