Hello, syzbot found the following issue on: HEAD commit: a3debf177f21 libbpf: Fix segfault in static linker for obj.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=122fa35f300000 kernel config: https://syzkaller.appspot.com/x/.config?x=c31c0936547df9ea dashboard link: https://syzkaller.appspot.com/bug?extid=f27ed6d2b22fe3b92377 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. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f27ed6d2b22fe3b92377@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xfe001bea7e002090: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xf000ff53f0010480-0xf000ff53f0010487] CPU: 0 PID: 29889 Comm: syz-executor.4 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_tp_filter_match kernel/events/core.c:9622 [inline] RIP: 0010:perf_tp_event_match kernel/events/core.c:9639 [inline] RIP: 0010:perf_tp_event_match kernel/events/core.c:9627 [inline] RIP: 0010:perf_tp_event+0x2af/0xb70 kernel/events/core.c:9682 Code: 3c 20 00 0f 85 d7 07 00 00 4c 8b bb e8 02 00 00 4d 85 ff 4c 0f 44 fb e8 df 37 e1 ff 49 8d bf 30 05 00 00 48 89 fa 48 c1 ea 03 <42> 80 3c 22 00 0f 85 a1 07 00 00 4d 8b 87 30 05 00 00 4d 85 c0 0f RSP: 0018:ffffc90002137540 EFLAGS: 00010806 RAX: 0000000000000a8c RBX: ffff887fffffffa0 RCX: ffffc90012317000 RDX: 1e001fea7e002090 RSI: ffffffff8194d811 RDI: f000ff53f0010483 RBP: ffffc900021377b0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8194d7ac R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880b9c2c800 R14: 0000000000000001 R15: f000ff53f000ff53 FS: 00007fb42500a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb424fe9718 CR3: 0000000021c6d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0x11c/0x210 kernel/events/core.c:9657 perf_trace_lock+0x2ef/0x4d0 include/trace/events/lock.h:39 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x4a8/0x720 kernel/locking/lockdep.c:5636 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x16/0x70 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] pcpu_alloc+0x848/0x1350 mm/percpu.c:1851 bpf_prog_alloc+0x4b/0x1a0 kernel/bpf/core.c:125 bpf_prog_load+0x651/0x21f0 kernel/bpf/syscall.c:2248 __sys_bpf+0x67e/0x5df0 kernel/bpf/syscall.c:4587 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb427a93709 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb42500a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb427b97f60 RCX: 00007fb427a93709 RDX: 0000000000000070 RSI: 0000000020000440 RDI: 0000000000000005 RBP: 00007fb427aedcb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe8ec545f R14: 00007fb42500a300 R15: 0000000000022000 Modules linked in: ---[ end trace 01ae9f661067bd97 ]--- RIP: 0010:perf_tp_filter_match kernel/events/core.c:9622 [inline] RIP: 0010:perf_tp_event_match kernel/events/core.c:9639 [inline] RIP: 0010:perf_tp_event_match kernel/events/core.c:9627 [inline] RIP: 0010:perf_tp_event+0x2af/0xb70 kernel/events/core.c:9682 Code: 3c 20 00 0f 85 d7 07 00 00 4c 8b bb e8 02 00 00 4d 85 ff 4c 0f 44 fb e8 df 37 e1 ff 49 8d bf 30 05 00 00 48 89 fa 48 c1 ea 03 <42> 80 3c 22 00 0f 85 a1 07 00 00 4d 8b 87 30 05 00 00 4d 85 c0 0f RSP: 0018:ffffc90002137540 EFLAGS: 00010806 RAX: 0000000000000a8c RBX: ffff887fffffffa0 RCX: ffffc90012317000 RDX: 1e001fea7e002090 RSI: ffffffff8194d811 RDI: f000ff53f0010483 RBP: ffffc900021377b0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8194d7ac R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880b9c2c800 R14: 0000000000000001 R15: f000ff53f000ff53 FS: 00007fb42500a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb424fe9718 CR3: 0000000021c6d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 20 00 and %al,(%rax) 2: 0f 85 d7 07 00 00 jne 0x7df 8: 4c 8b bb e8 02 00 00 mov 0x2e8(%rbx),%r15 f: 4d 85 ff test %r15,%r15 12: 4c 0f 44 fb cmove %rbx,%r15 16: e8 df 37 e1 ff callq 0xffe137fa 1b: 49 8d bf 30 05 00 00 lea 0x530(%r15),%rdi 22: 48 89 fa mov %rdi,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 42 80 3c 22 00 cmpb $0x0,(%rdx,%r12,1) <-- trapping instruction 2e: 0f 85 a1 07 00 00 jne 0x7d5 34: 4d 8b 87 30 05 00 00 mov 0x530(%r15),%r8 3b: 4d 85 c0 test %r8,%r8 3e: 0f .byte 0xf --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
