syzbot


memory leak in do_replace

Status: upstream: reported C repro on 2022/09/19 23:27
Reported-by: syzbot+a24c5252f3e3ab733464@syzkaller.appspotmail.com
Fix commit: 62ce44c4fff9 netfilter: ebtables: fix memory leak when blob is malformed
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-bpf-next-kasan-gce ci-upstream-gce-arm64 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-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 142d, last: 142d
Last patch testing requests:
Created Duration User Patch Repo Result
2022/09/20 06:59 16m fw@strlen.de patch upstream OK log
2022/09/20 06:30 3m fw@strlen.de patch upstream error

Sample crash report:
executing program
executing program
executing program
executing program
BUG: memory leak
unreferenced object 0xffffc90000ded000 (size 4096):
  comm "syz-executor317", pid 3615, jiffies 4294946120 (age 22.550s)
  hex dump (first 32 bytes):
    90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8153105f>] __vmalloc_node_range+0xb3f/0xbd0 mm/vmalloc.c:3224
    [<ffffffff81531239>] __vmalloc_node mm/vmalloc.c:3261 [inline]
    [<ffffffff81531239>] __vmalloc+0x49/0x50 mm/vmalloc.c:3275
    [<ffffffff83e28027>] do_replace+0x197/0x340 net/bridge/netfilter/ebtables.c:1131
    [<ffffffff83e2880c>] do_ebt_set_ctl+0x22c/0x310 net/bridge/netfilter/ebtables.c:2520
    [<ffffffff83a3fb68>] nf_setsockopt+0x68/0xa0 net/netfilter/nf_sockopt.c:101
    [<ffffffff83bb5d69>] ip_setsockopt+0x259/0x2040 net/ipv4/ip_sockglue.c:1444
    [<ffffffff83bcbe10>] tcp_setsockopt+0x70/0x1430 net/ipv4/tcp.c:3789
    [<ffffffff8425d1d8>] smc_setsockopt+0xd8/0x5c0 net/smc/af_smc.c:2941
    [<ffffffff8386dd2b>] __sys_setsockopt+0x1ab/0x380 net/socket.c:2252
    [<ffffffff8386df22>] __do_sys_setsockopt net/socket.c:2263 [inline]
    [<ffffffff8386df22>] __se_sys_setsockopt net/socket.c:2260 [inline]
    [<ffffffff8386df22>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2260
    [<ffffffff845eab35>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff845eab35>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffffc90000df5000 (size 4096):
  comm "syz-executor317", pid 3615, jiffies 4294946120 (age 22.550s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8153105f>] __vmalloc_node_range+0xb3f/0xbd0 mm/vmalloc.c:3224
    [<ffffffff81531239>] __vmalloc_node mm/vmalloc.c:3261 [inline]
    [<ffffffff81531239>] __vmalloc+0x49/0x50 mm/vmalloc.c:3275
    [<ffffffff83e28071>] do_replace+0x1e1/0x340 net/bridge/netfilter/ebtables.c:1138
    [<ffffffff83e2880c>] do_ebt_set_ctl+0x22c/0x310 net/bridge/netfilter/ebtables.c:2520
    [<ffffffff83a3fb68>] nf_setsockopt+0x68/0xa0 net/netfilter/nf_sockopt.c:101
    [<ffffffff83bb5d69>] ip_setsockopt+0x259/0x2040 net/ipv4/ip_sockglue.c:1444
    [<ffffffff83bcbe10>] tcp_setsockopt+0x70/0x1430 net/ipv4/tcp.c:3789
    [<ffffffff8425d1d8>] smc_setsockopt+0xd8/0x5c0 net/smc/af_smc.c:2941
    [<ffffffff8386dd2b>] __sys_setsockopt+0x1ab/0x380 net/socket.c:2252
    [<ffffffff8386df22>] __do_sys_setsockopt net/socket.c:2263 [inline]
    [<ffffffff8386df22>] __se_sys_setsockopt net/socket.c:2260 [inline]
    [<ffffffff8386df22>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2260
    [<ffffffff845eab35>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff845eab35>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd


Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-gce-leak 2022/09/15 23:25 upstream 3245cb65fd91 dd9a85ff .config console log report syz C [disk image] [vmlinux] memory leak in do_replace
* Struck through repros no longer work on HEAD.