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AJvYcCVGAy1pejk0/zgy5psM5ZS/0Zk2U5mGdnB0MSyDEbJbSIwihDiiA59+D0TBmaJ2JGM7IyjVe/I=@vger.kernel.org X-Gm-Message-State: AOJu0YxI/pKKfFaShcGMfPmsWnZizxvElqAUE9TiTKFv/rGeZN88C1lL 7rnLWXHkYp70QICZJCr8C+RObtw1wRCE43yJ8BcwAVqn45lF+utSw/BmUo3RUnEBCbqxsvLOJtB E2OsHosH0TrdFTL0k68VBCnD5jpG+4yZ+5ouwRKbpFuw9q8iApPvKl0A= X-Google-Smtp-Source: AGHT+IEMTTjR3dYhXKua/OTKRfkCZwu+4yRP9qDdp+MaoIt93J1zWlRRc5Apel76dVoHwX826H3pVjxNlRYPn1nfXLV9IDbHzKfF Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:190b:b0:3a0:91e7:67cc with SMTP id e9e14a558f8ab-3a26d7747famr11393505ab.13.1727214680184; Tue, 24 Sep 2024 14:51:20 -0700 (PDT) Date: Tue, 24 Sep 2024 14:51:20 -0700 In-Reply-To: <00000000000088906d0622445beb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66f33458.050a0220.457fc.001e.GAE@google.com> Subject: Re: [syzbot] [net?] UBSAN: shift-out-of-bounds in xfrm_selector_match (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, herbert@gondor.apana.org.au, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 151ac45348af net: sparx5: Fix invalid timestamps git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=15808a80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=37c006d80708398d dashboard link: https://syzkaller.appspot.com/bug?extid=cc39f136925517aed571 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=122ad2a9980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1387b107980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/81152b131cff/disk-151ac453.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/013d9758c594/vmlinux-151ac453.xz kernel image: https://storage.googleapis.com/syzbot-assets/9ff7505093fc/bzImage-151ac453.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cc39f136925517aed571@syzkaller.appspotmail.com ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in ./include/net/xfrm.h:900:23 shift exponent -96 is negative CPU: 0 UID: 0 PID: 5231 Comm: syz-executor893 Not tainted 6.11.0-syzkaller-01459-g151ac45348af #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 addr4_match include/net/xfrm.h:900 [inline] __xfrm4_selector_match net/xfrm/xfrm_policy.c:222 [inline] xfrm_selector_match+0xe9b/0x1030 net/xfrm/xfrm_policy.c:247 xfrm_state_look_at+0xe8/0x480 net/xfrm/xfrm_state.c:1172 xfrm_state_find+0x199f/0x4d70 net/xfrm/xfrm_state.c:1280 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2481 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2532 [inline] xfrm_resolve_and_create_bundle+0x6d2/0x2c90 net/xfrm/xfrm_policy.c:2826 xfrm_lookup_with_ifid+0x334/0x1ee0 net/xfrm/xfrm_policy.c:3160 xfrm_lookup net/xfrm/xfrm_policy.c:3289 [inline] xfrm_lookup_route+0x3c/0x1c0 net/xfrm/xfrm_policy.c:3300 ip_route_connect include/net/route.h:333 [inline] __ip4_datagram_connect+0x96c/0x1260 net/ipv4/datagram.c:49 __ip6_datagram_connect+0x194/0x1230 ip6_datagram_connect net/ipv6/datagram.c:279 [inline] ip6_datagram_connect_v6_only+0x63/0xa0 net/ipv6/datagram.c:291 __sys_connect_file net/socket.c:2067 [inline] __sys_connect+0x2df/0x310 net/socket.c:2084 __do_sys_connect net/socket.c:2094 [inline] __se_sys_connect net/socket.c:2091 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2091 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: 0033:0x7fb0cdb8e8a9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdce8cd648 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007ffdce8cd818 RCX: 00007fb0cdb8e8a9 RDX: 000000000000001c RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007fb0cdc01610 R08: 000000000000000a R09: 00007ffdce8cd818 R10: 00000000000000e8 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffdce8cd808 R14: 0000000000000001 R15: 0000000000000001 ---[ end trace ]--- --- 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.