Hello, syzbot found the following issue on: HEAD commit: 81c325bbf94e kmsan: hooks: do not check memory in kmsan_in.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=15dad2c3b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=2d8b9a11641dc9aa dashboard link: https://syzkaller.appspot.com/bug?extid=70a42f45e76bede082be compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=173a7b0db00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14de2ffdb00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+70a42f45e76bede082be@xxxxxxxxxxxxxxxxxxxxxxxxx netlink: 244 bytes leftover after parsing attributes in process `syz-executor678'. ===================================================== BUG: KMSAN: uninit-value in sctp_inq_pop+0x15c8/0x18f0 net/sctp/inqueue.c:205 sctp_inq_pop+0x15c8/0x18f0 net/sctp/inqueue.c:205 sctp_assoc_bh_rcv+0x1fa/0xdd0 net/sctp/associola.c:1000 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x30f/0x10b0 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:1030 [inline] __release_sock+0x256/0x640 net/core/sock.c:2768 release_sock+0x98/0x2e0 net/core/sock.c:3300 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9306 sctp_sendmsg_to_asoc+0x1c47/0x1f90 net/sctp/socket.c:1881 sctp_sendmsg+0x3eaa/0x5460 net/sctp/socket.c:2027 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x9ef/0xc70 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0x19c/0x210 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was stored to memory at: sctp_inq_pop+0x155c/0x18f0 net/sctp/inqueue.c:201 sctp_assoc_bh_rcv+0x1fa/0xdd0 net/sctp/associola.c:1000 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x30f/0x10b0 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:1030 [inline] __release_sock+0x256/0x640 net/core/sock.c:2768 release_sock+0x98/0x2e0 net/core/sock.c:3300 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9306 sctp_sendmsg_to_asoc+0x1c47/0x1f90 net/sctp/socket.c:1881 sctp_sendmsg+0x3eaa/0x5460 net/sctp/socket.c:2027 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x9ef/0xc70 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0x19c/0x210 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] sctp_packet_pack net/sctp/output.c:471 [inline] sctp_packet_transmit+0x194c/0x45a0 net/sctp/output.c:620 sctp_outq_flush_transports net/sctp/outqueue.c:1163 [inline] sctp_outq_flush+0x17d9/0x5eb0 net/sctp/outqueue.c:1211 sctp_outq_uncork+0x105/0x120 net/sctp/outqueue.c:758 sctp_side_effects net/sctp/sm_sideeffect.c:1195 [inline] sctp_do_sm+0x946f/0x9b50 net/sctp/sm_sideeffect.c:1166 sctp_assoc_bh_rcv+0xa15/0xdd0 net/sctp/associola.c:1054 sctp_inq_push+0x31c/0x440 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x30f/0x10b0 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:1030 [inline] __release_sock+0x256/0x640 net/core/sock.c:2768 release_sock+0x98/0x2e0 net/core/sock.c:3300 sctp_wait_for_connect+0x52a/0x9e0 net/sctp/socket.c:9306 sctp_sendmsg_to_asoc+0x1c47/0x1f90 net/sctp/socket.c:1881 sctp_sendmsg+0x3eaa/0x5460 net/sctp/socket.c:2027 inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x9ef/0xc70 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0x19c/0x210 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 0 PID: 3479 Comm: syz-executor678 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ===================================================== --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
