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Message-ID: <67530069.050a0220.2477f.0003.GAE@google.com> Date: Fri, 06 Dec 2024 05:47:21 -0800 From: syzbot <syzbot+2e0d2840414ce817aaac@...kaller.appspotmail.com> To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net, eddyz87@...il.com, haoluo@...gle.com, john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org, linux-kernel@...r.kernel.org, martin.lau@...ux.dev, netdev@...r.kernel.org, sdf@...ichev.me, song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev Subject: [syzbot] [bpf?] general protection fault in bpf_prog_array_delete_safe Hello, syzbot found the following issue on: HEAD commit: e2cf913314b9 Merge branch 'fixes-for-stack-with-allow_ptr_.. git tree: bpf console+strace: https://syzkaller.appspot.com/x/log.txt?x=13b5ede8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fb680913ee293bcc dashboard link: https://syzkaller.appspot.com/bug?extid=2e0d2840414ce817aaac compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=132a2020580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1291d0f8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/487d8ef2aead/disk-e2cf9133.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/899f2234c9d5/vmlinux-e2cf9133.xz kernel image: https://storage.googleapis.com/syzbot-assets/ea8993a0dfd6/bzImage-e2cf9133.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2e0d2840414ce817aaac@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 UID: 0 PID: 5849 Comm: syz-executor326 Not tainted 6.12.0-syzkaller-09099-ge2cf913314b9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:bpf_prog_array_delete_safe+0x2d/0xc0 kernel/bpf/core.c:2583 Code: 00 41 57 41 56 41 55 41 54 53 49 89 f7 49 89 fd 49 bc 00 00 00 00 00 fc ff df e8 ce 84 f0 ff 4d 8d 75 10 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 54 6b 5b 00 49 8b 1e 48 85 db 74 RSP: 0018:ffffc90003807970 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 1ffff92000700f38 RCX: ffff888034eb8000 RDX: 0000000000000000 RSI: ffffc90000abe000 RDI: 0000000000000000 RBP: ffffc90003807a48 R08: ffffffff81a1aa9e R09: 1ffffffff203c816 R10: dffffc0000000000 R11: fffffbfff203c817 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000010 R15: ffffc90000abe000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000e738000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> perf_event_detach_bpf_prog+0x2b0/0x330 kernel/trace/bpf_trace.c:2255 perf_event_free_bpf_prog kernel/events/core.c:10801 [inline] _free_event+0xb04/0xf60 kernel/events/core.c:5352 put_event kernel/events/core.c:5454 [inline] perf_event_release_kernel+0x7c1/0x850 kernel/events/core.c:5579 perf_release+0x38/0x40 kernel/events/core.c:5589 __fput+0x23c/0xa50 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9408276e09 Code: Unable to access opcode bytes at 0x7f9408276ddf. RSP: 002b:00007fffe6c98ad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9408276e09 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f94082f22b0 R08: ffffffffffffffb8 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f94082f22b0 R13: 0000000000000000 R14: 00007f94082f2d00 R15: 00007f9408248040 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bpf_prog_array_delete_safe+0x2d/0xc0 kernel/bpf/core.c:2583 Code: 00 41 57 41 56 41 55 41 54 53 49 89 f7 49 89 fd 49 bc 00 00 00 00 00 fc ff df e8 ce 84 f0 ff 4d 8d 75 10 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 54 6b 5b 00 49 8b 1e 48 85 db 74 RSP: 0018:ffffc90003807970 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 1ffff92000700f38 RCX: ffff888034eb8000 RDX: 0000000000000000 RSI: ffffc90000abe000 RDI: 0000000000000000 RBP: ffffc90003807a48 R08: ffffffff81a1aa9e R09: 1ffffffff203c816 R10: dffffc0000000000 R11: fffffbfff203c817 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000010 R15: ffffc90000abe000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007f382000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 41 57 add %al,0x57(%rcx) 3: 41 56 push %r14 5: 41 55 push %r13 7: 41 54 push %r12 9: 53 push %rbx a: 49 89 f7 mov %rsi,%r15 d: 49 89 fd mov %rdi,%r13 10: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 17: fc ff df 1a: e8 ce 84 f0 ff call 0xfff084ed 1f: 4d 8d 75 10 lea 0x10(%r13),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 f7 mov %r14,%rdi 34: e8 54 6b 5b 00 call 0x5b6b8d 39: 49 8b 1e mov (%r14),%rbx 3c: 48 85 db test %rbx,%rbx 3f: 74 .byte 0x74 --- 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@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 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
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