| 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: <68666a48.a00a0220.c7b3.0003.GAE@google.com> Date: Thu, 03 Jul 2025 04:32:24 -0700 From: syzbot <syzbot+d8b58d7b0ad89a678a16@...kaller.appspotmail.com> To: davem@...emloft.net, edumazet@...gle.com, horms@...nel.org, jhs@...atatu.com, jiri@...nulli.us, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, xiyou.wangcong@...il.com Subject: Re: [syzbot] [net?] general protection fault in htb_qlen_notify syzbot has found a reproducer for the following issue on: HEAD commit: bd475eeaaf3c Merge branch '200GbE' of git://git.kernel.org.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=15cc0582580000 kernel config: https://syzkaller.appspot.com/x/.config?x=36b0e72cad5298f8 dashboard link: https://syzkaller.appspot.com/bug?extid=d8b58d7b0ad89a678a16 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1113748c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10909ebc580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d59bc82a55e0/disk-bd475eea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2a83759fceb6/vmlinux-bd475eea.xz kernel image: https://storage.googleapis.com/syzbot-assets/07576fd8e432/bzImage-bd475eea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8b58d7b0ad89a678a16@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000035: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000001a8-0x00000000000001af] CPU: 1 UID: 0 PID: 6017 Comm: syz.0.16 Not tainted 6.16.0-rc3-syzkaller-00144-gbd475eeaaf3c #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x31/0xc0 net/sched/sch_htb.c:1489 Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 3d c6 46 f8 49 8d 9e a8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 4d 8b 2b 31 ff 89 ee e8 5a ca 46 f8 85 RSP: 0018:ffffc900034f6fb0 EFLAGS: 00010206 RAX: ffffffff89798833 RBX: 00000000000001a8 RCX: ffff88802714bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a6ac000 RBP: dffffc0000000000 R08: ffff88802714bc00 R09: 0000000000000002 R10: 00000000ffffffff R11: ffffffff89798810 R12: dffffc0000000000 R13: 0000000000000035 R14: 0000000000000000 R15: ffff88807a6ac000 FS: 00007fa0c3df16c0(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0c3dd0d58 CR3: 00000000743e8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> qdisc_tree_reduce_backlog+0x29c/0x480 net/sched/sch_api.c:811 fq_change+0x1519/0x1f50 net/sched/sch_fq.c:1147 fq_init+0x699/0x960 net/sched/sch_fq.c:1201 qdisc_create+0x7ac/0xea0 net/sched/sch_api.c:1324 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline] tc_modify_qdisc+0x1426/0x2010 net/sched/sch_api.c:1813 rtnetlink_rcv_msg+0x779/0xb70 net/core/rtnetlink.c:6953 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa0c2f8e929 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa0c3df1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa0c31b5fa0 RCX: 00007fa0c2f8e929 RDX: 0000000000044080 RSI: 0000200000000040 RDI: 0000000000000006 RBP: 00007fa0c3010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa0c31b5fa0 R15: 00007ffd14aa8178 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x31/0xc0 net/sched/sch_htb.c:1489 Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 3d c6 46 f8 49 8d 9e a8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 4d 8b 2b 31 ff 89 ee e8 5a ca 46 f8 85 RSP: 0018:ffffc900034f6fb0 EFLAGS: 00010206 RAX: ffffffff89798833 RBX: 00000000000001a8 RCX: ffff88802714bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a6ac000 RBP: dffffc0000000000 R08: ffff88802714bc00 R09: 0000000000000002 R10: 00000000ffffffff R11: ffffffff89798810 R12: dffffc0000000000 R13: 0000000000000035 R14: 0000000000000000 R15: ffff88807a6ac000 FS: 00007fa0c3df16c0(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0c3dd0d58 CR3: 00000000743e8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 56 push %r14 2: 41 55 push %r13 4: 41 54 push %r12 6: 53 push %rbx 7: 49 89 f6 mov %rsi,%r14 a: 49 89 ff mov %rdi,%r15 d: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 14: fc ff df 17: e8 3d c6 46 f8 call 0xf846c659 1c: 49 8d 9e a8 01 00 00 lea 0x1a8(%r14),%rbx 23: 49 89 dd mov %rbx,%r13 26: 49 c1 ed 03 shr $0x3,%r13 * 2a: 43 0f b6 44 25 00 movzbl 0x0(%r13,%r12,1),%eax <-- trapping instruction 30: 84 c0 test %al,%al 32: 75 4d jne 0x81 34: 8b 2b mov (%rbx),%ebp 36: 31 ff xor %edi,%edi 38: 89 ee mov %ebp,%esi 3a: e8 5a ca 46 f8 call 0xf846ca99 3f: 85 .byte 0x85 --- 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.
Powered by blists - more mailing lists