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Message-ID: <00000000000099cf25061964d113@google.com> Date: Sun, 26 May 2024 17:44:24 -0700 From: syzbot <syzbot+cca39e6e84a367a7e6f6@...kaller.appspotmail.com> To: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net, davem@...emloft.net, eddyz87@...il.com, haoluo@...gle.com, hawk@...nel.org, john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org, kuba@...nel.org, linux-kernel@...r.kernel.org, martin.lau@...ux.dev, netdev@...r.kernel.org, sdf@...gle.com, song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev Subject: [syzbot] [bpf?] [net?] general protection fault in dev_map_enqueue (2) Hello, syzbot found the following issue on: HEAD commit: 8f6a15f095a6 Merge tag 'cocci-for-6.10' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=136bd8fc980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6be91306a8917025 dashboard link: https://syzkaller.appspot.com/bug?extid=cca39e6e84a367a7e6f6 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/02867060d65d/disk-8f6a15f0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4bb75fbf6fb1/vmlinux-8f6a15f0.xz kernel image: https://storage.googleapis.com/syzbot-assets/fd38cadddf33/bzImage-8f6a15f0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cca39e6e84a367a7e6f6@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000003b: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000001d8-0x00000000000001df] CPU: 0 PID: 12830 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:484 [inline] RIP: 0010:dev_map_enqueue+0x70/0x3e0 kernel/bpf/devmap.c:541 Code: c5 18 48 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 ef e8 b2 10 3a 00 48 8b 5d 00 49 8d af d8 01 00 00 48 89 e8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 3a 02 00 00 8b 6d 00 89 ee 83 e6 04 31 RSP: 0018:ffffc900031ff678 EFLAGS: 00010202 RAX: 000000000000003b RBX: ffff888023efa078 RCX: 0000000000040000 RDX: ffffc90015e01000 RSI: 0000000000000ba1 RDI: 0000000000000ba2 RBP: 00000000000001d9 R08: ffffffff895b0946 R09: ffffffff895b0903 R10: 0000000000000004 R11: ffff888020d73c00 R12: ffff888058f06000 R13: ffff888021fff070 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f9f791576c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30823000 CR3: 000000002e298000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __xdp_do_redirect_frame net/core/filter.c:4397 [inline] xdp_do_redirect_frame+0x2a6/0x660 net/core/filter.c:4451 xdp_test_run_batch net/bpf/test_run.c:336 [inline] bpf_test_run_xdp_live+0xe60/0x1e60 net/bpf/test_run.c:384 bpf_prog_test_run_xdp+0x80e/0x11b0 net/bpf/test_run.c:1275 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4291 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5705 __do_sys_bpf kernel/bpf/syscall.c:5794 [inline] __se_sys_bpf kernel/bpf/syscall.c:5792 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5792 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9f7847cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9f791570c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9f785ac050 RCX: 00007f9f7847cee9 RDX: 0000000000000048 RSI: 00000000200000c0 RDI: 000000000000000a RBP: 00007f9f784c949e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f9f785ac050 R15: 00007ffc7dc03298 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:484 [inline] RIP: 0010:dev_map_enqueue+0x70/0x3e0 kernel/bpf/devmap.c:541 Code: c5 18 48 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 ef e8 b2 10 3a 00 48 8b 5d 00 49 8d af d8 01 00 00 48 89 e8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 3a 02 00 00 8b 6d 00 89 ee 83 e6 04 31 RSP: 0018:ffffc900031ff678 EFLAGS: 00010202 RAX: 000000000000003b RBX: ffff888023efa078 RCX: 0000000000040000 RDX: ffffc90015e01000 RSI: 0000000000000ba1 RDI: 0000000000000ba2 RBP: 00000000000001d9 R08: ffffffff895b0946 R09: ffffffff895b0903 R10: 0000000000000004 R11: ffff888020d73c00 R12: ffff888058f06000 R13: ffff888021fff070 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f9f791576c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30823000 CR3: 000000002e298000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 18 48 89 sbb %cl,-0x77(%rax) 3: e8 48 c1 e8 03 call 0x3e8c150 8: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) d: 74 08 je 0x17 f: 48 89 ef mov %rbp,%rdi 12: e8 b2 10 3a 00 call 0x3a10c9 17: 48 8b 5d 00 mov 0x0(%rbp),%rbx 1b: 49 8d af d8 01 00 00 lea 0x1d8(%r15),%rbp 22: 48 89 e8 mov %rbp,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 3a 02 00 00 jne 0x270 36: 8b 6d 00 mov 0x0(%rbp),%ebp 39: 89 ee mov %ebp,%esi 3b: 83 e6 04 and $0x4,%esi 3e: 31 .byte 0x31 --- 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 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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