syzbot


memory leak in ipv6_renew_options

Status: upstream: reported C repro on 2022/07/17 18:21
Reported-by: syzbot+a8430774139ec3ab7176@syzkaller.appspotmail.com
Fix commit: e27326009a3d net: ping6: Fix memleak in ipv6_renew_options().
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-net-kasan-gce]
First crash: 28d, last: 28d
Patch testing requests:
Created Duration User Patch Repo Result
2022/07/28 00:31 16m yepeilin.cs@gmail.com patch upstream OK log

Sample crash report:
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810b810f00 (size 96):
  comm "syz-executor113", pid 3606, jiffies 4294944081 (age 12.460s)
  hex dump (first 32 bytes):
    01 00 00 00 48 00 00 00 00 00 08 00 00 00 00 00  ....H...........
    00 00 00 00 00 00 00 00 40 0f 81 0b 81 88 ff ff  ........@.......
  backtrace:
    [<ffffffff83855781>] kmalloc include/linux/slab.h:605 [inline]
    [<ffffffff83855781>] sock_kmalloc net/core/sock.c:2563 [inline]
    [<ffffffff83855781>] sock_kmalloc+0x61/0x90 net/core/sock.c:2554
    [<ffffffff83d3fa60>] ipv6_renew_options+0x120/0x440 net/ipv6/exthdrs.c:1318
    [<ffffffff83d138ad>] ipv6_set_opt_hdr net/ipv6/ipv6_sockglue.c:354 [inline]
    [<ffffffff83d138ad>] do_ipv6_setsockopt.constprop.0+0x49d/0x24d0 net/ipv6/ipv6_sockglue.c:668
    [<ffffffff83d1599e>] ipv6_setsockopt+0xbe/0x120 net/ipv6/ipv6_sockglue.c:1021
    [<ffffffff838517d0>] __sys_setsockopt+0x1b0/0x390 net/socket.c:2254
    [<ffffffff838519d2>] __do_sys_setsockopt net/socket.c:2265 [inline]
    [<ffffffff838519d2>] __se_sys_setsockopt net/socket.c:2262 [inline]
    [<ffffffff838519d2>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2262
    [<ffffffff845ad915>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff845ad915>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd


Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-gce-leak 2022/07/13 18:16 upstream b047602d579b 5d921b08 .config log report syz C memory leak in ipv6_renew_options