Hello, syzbot found the following issue on: HEAD commit: 741e9d668aa5 Merge tag 'scsi-misc' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ec5ac9180000 kernel config: https://syzkaller.appspot.com/x/.config?x=48bb382b96e7eda7 dashboard link: https://syzkaller.appspot.com/bug?extid=d2b113dc9fea5e1d2848 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=129b7946180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17be1546180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/20ec6fc7fdfe/disk-741e9d66.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/81cd64abe7a8/vmlinux-741e9d66.xz kernel image: https://storage.googleapis.com/syzbot-assets/180340ffa1c7/bzImage-741e9d66.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d2b113dc9fea5e1d2848@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in trie_lookup_elem+0x4b9/0x510 kernel/bpf/lpm_trie.c:234 trie_lookup_elem+0x4b9/0x510 kernel/bpf/lpm_trie.c:234 ____bpf_map_lookup_elem kernel/bpf/helpers.c:42 [inline] bpf_map_lookup_elem+0x5c/0x80 kernel/bpf/helpers.c:38 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997 __bpf_prog_run32+0xb2/0xe0 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x116/0x300 kernel/trace/bpf_trace.c:2420 __bpf_trace_skb_copy_datagram_iovec+0x2c/0x40 include/trace/events/skb.h:73 trace_skb_copy_datagram_iovec include/trace/events/skb.h:73 [inline] skb_copy_datagram_iter+0x15e/0x200 net/core/datagram.c:545 skb_copy_datagram_msg include/linux/skbuff.h:4045 [inline] tcp_recvmsg_locked+0xcf6/0x3680 net/ipv4/tcp.c:2500 tcp_recvmsg+0x279/0xad0 net/ipv4/tcp.c:2578 inet_recvmsg+0x167/0x6a0 net/ipv4/af_inet.c:883 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0x235/0x340 net/socket.c:1068 sock_read_iter+0x333/0x3c0 net/socket.c:1138 call_read_iter include/linux/fs.h:2102 [inline] new_sync_read fs/read_write.c:395 [inline] vfs_read+0xda3/0xef0 fs/read_write.c:476 ksys_read+0x20f/0x4c0 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x93/0xe0 fs/read_write.c:627 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Local variable stack created at: __bpf_prog_run32+0x43/0xe0 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run2+0x116/0x300 kernel/trace/bpf_trace.c:2420 CPU: 0 PID: 5010 Comm: sshd Not tainted 6.8.0-syzkaller-11339-g741e9d668aa5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== --- 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@xxxxxxxxxxxxxxxx. 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 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. 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
