| 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: <6735d39a.050a0220.1324f8.0096.GAE@google.com> Date: Thu, 14 Nov 2024 02:40:26 -0800 From: syzbot <syzbot+35e7e2811bbe5777b20e@...kaller.appspotmail.com> To: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com Subject: [syzbot] [net?] KMSAN: uninit-value in __vxlan_find_mac Hello, syzbot found the following issue on: HEAD commit: de2f378f2b77 Merge tag 'nfsd-6.12-4' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b170c0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e4580d62ee1893a5 dashboard link: https://syzkaller.appspot.com/bug?extid=35e7e2811bbe5777b20e 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/f0ff1d637186/disk-de2f378f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1515128a919f/vmlinux-de2f378f.xz kernel image: https://storage.googleapis.com/syzbot-assets/6624bf235bc6/bzImage-de2f378f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+35e7e2811bbe5777b20e@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __vxlan_find_mac+0x497/0x4e0 __vxlan_find_mac+0x497/0x4e0 vxlan_find_mac drivers/net/vxlan/vxlan_core.c:436 [inline] vxlan_xmit+0x1669/0x39f0 drivers/net/vxlan/vxlan_core.c:2753 __netdev_start_xmit include/linux/netdevice.h:4928 [inline] netdev_start_xmit include/linux/netdevice.h:4937 [inline] xmit_one net/core/dev.c:3588 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3604 __dev_queue_xmit+0x3562/0x56d0 net/core/dev.c:4432 dev_queue_xmit include/linux/netdevice.h:3094 [inline] __bpf_tx_skb net/core/filter.c:2152 [inline] __bpf_redirect_common net/core/filter.c:2196 [inline] __bpf_redirect+0x148c/0x1610 net/core/filter.c:2203 ____bpf_clone_redirect net/core/filter.c:2477 [inline] bpf_clone_redirect+0x37e/0x500 net/core/filter.c:2447 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:2010 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434 bpf_prog_test_run_skb+0x182f/0x24d0 net/bpf/test_run.c:1095 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4266 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5671 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5758 x64_sys_call+0x2cce/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 pskb_expand_head+0x226/0x1a60 net/core/skbuff.c:2275 skb_ensure_writable+0x496/0x520 net/core/skbuff.c:6214 __bpf_try_make_writable net/core/filter.c:1677 [inline] bpf_try_make_writable net/core/filter.c:1683 [inline] bpf_try_make_head_writable net/core/filter.c:1691 [inline] ____bpf_clone_redirect net/core/filter.c:2471 [inline] bpf_clone_redirect+0x1c5/0x500 net/core/filter.c:2447 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:2010 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434 bpf_prog_test_run_skb+0x182f/0x24d0 net/bpf/test_run.c:1095 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4266 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5671 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5758 x64_sys_call+0x2cce/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 8041 Comm: syz.2.760 Not tainted 6.12.0-rc6-syzkaller-00279-gde2f378f2b77 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 ===================================================== --- 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