| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <6970d61d.050a0220.706b.0010.GAE@google.com> Date: Wed, 21 Jan 2026 05:35:25 -0800 From: syzbot <syzbot+5cf914f193dffde3bd3c@...kaller.appspotmail.com> To: davem@...emloft.net, edumazet@...gle.com, horms@...nel.org, jhs@...atatu.com, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, yotam.gi@...il.com Subject: [syzbot] [net?] general protection fault in ife_tlv_meta_encode Hello, syzbot found the following issue on: HEAD commit: c03e9c42ae8f Merge tag 'dma-mapping-6.19-2026-01-20' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ce73fa580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ae589cd0a6acd9be dashboard link: https://syzkaller.appspot.com/bug?extid=5cf914f193dffde3bd3c compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c03e9c42.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b6abca6c0155/vmlinux-c03e9c42.xz kernel image: https://storage.googleapis.com/syzbot-assets/1bcd936b6484/bzImage-c03e9c42.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5cf914f193dffde3bd3c@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166 Code: 89 d5 53 89 f3 c1 e3 10 e8 8c ed 71 f6 0f b7 c5 4c 89 ea 44 8d 78 07 83 c0 04 48 c1 ea 03 09 c3 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 e8 0f cb 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 RSP: 0018:ffffc900038cf238 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000010008 RCX: ffffc900038cf290 RDX: 0000000000000000 RSI: ffffffff8b4c7434 RDI: 0000000000000000 RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000001000 R11: 000000000000001e R12: ffffc900038cf290 R13: 0000000000000000 R14: 0000000000000004 R15: 000000000000000b FS: 0000000000000000(0000) GS:ffff8880979f6000(0063) knlGS:00000000f544db40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f544cfac CR3: 000000006a9f4000 CR4: 0000000000352ef0 Call Trace: <TASK> ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101 tcf_ife_encode net/sched/act_ife.c:841 [inline] tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877 tc_act include/net/tc_wrapper.h:130 [inline] tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152 tcf_exts_exec include/net/pkt_cls.h:349 [inline] mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42 tc_classify include/net/tc_wrapper.h:197 [inline] __tcf_classify net/sched/cls_api.c:1764 [inline] tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860 multiq_classify net/sched/sch_multiq.c:39 [inline] multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66 dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147 __dev_xmit_skb net/core/dev.c:4262 [inline] __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798 dev_queue_xmit include/linux/netdevice.h:3381 [inline] packet_xmit+0x23e/0x350 net/packet/af_packet.c:275 packet_snd net/packet/af_packet.c:3076 [inline] packet_sendmsg+0x26e3/0x54a0 net/packet/af_packet.c:3108 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa5d/0xc30 net/socket.c:2592 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2646 __sys_sendmsg+0x16d/0x220 net/socket.c:2678 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xe8/0x680 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf705d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f544d55c EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00000000800000c0 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166 Code: 89 d5 53 89 f3 c1 e3 10 e8 8c ed 71 f6 0f b7 c5 4c 89 ea 44 8d 78 07 83 c0 04 48 c1 ea 03 09 c3 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 e8 0f cb 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 RSP: 0018:ffffc900038cf238 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000010008 RCX: ffffc900038cf290 RDX: 0000000000000000 RSI: ffffffff8b4c7434 RDI: 0000000000000000 RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000001000 R11: 000000000000001e R12: ffffc900038cf290 R13: 0000000000000000 R14: 0000000000000004 R15: 000000000000000b FS: 0000000000000000(0000) GS:ffff8880979f6000(0063) knlGS:00000000f544db40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f544cfac CR3: 000000006a9f4000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 89 d5 mov %edx,%ebp 2: 53 push %rbx 3: 89 f3 mov %esi,%ebx 5: c1 e3 10 shl $0x10,%ebx 8: e8 8c ed 71 f6 call 0xf671ed99 d: 0f b7 c5 movzwl %bp,%eax 10: 4c 89 ea mov %r13,%rdx 13: 44 8d 78 07 lea 0x7(%rax),%r15d 17: 83 c0 04 add $0x4,%eax 1a: 48 c1 ea 03 shr $0x3,%rdx 1e: 09 c3 or %eax,%ebx 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 4c 89 e8 mov %r13,%rax 31: 0f cb bswap %ebx 33: 83 e0 07 and $0x7,%eax 36: 83 c0 03 add $0x3,%eax 39: 38 d0 cmp %dl,%al 3b: 7c 04 jl 0x41 3d: 84 d2 test %dl,%dl 3f: 75 .byte 0x75 --- 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
Powered by blists - more mailing lists