syzbot


memory leak in do_replace

Status: fixed on 2023/02/24 13:50
Subsystems: netfilter bridge
[Documentation on labels]
Reported-by: syzbot+a24c5252f3e3ab733464@syzkaller.appspotmail.com
Fix commit: 62ce44c4fff9 netfilter: ebtables: fix memory leak when blob is malformed
First crash: 585d, last: 585d
Discussions (9)
Title Replies (including bot) Last reply
[PATCH 5.19 000/207] 5.19.12-rc1 review 228 (228) 2022/09/29 22:16
[PATCH 5.4 000/120] 5.4.215-rc1 review 132 (132) 2022/09/28 16:22
[PATCH 4.19 00/58] 4.19.260-rc1 review 63 (63) 2022/09/27 00:59
[PATCH 5.15 000/148] 5.15.71-rc1 review 156 (156) 2022/09/26 22:48
[PATCH 5.10 000/141] 5.10.146-rc1 review 145 (145) 2022/09/26 15:59
[PATCH 4.14 00/40] 4.14.295-rc1 review 46 (46) 2022/09/26 15:56
[PATCH net 0/5] netfilter: bugfixes for net 7 (7) 2022/09/21 08:20
[PATCH nf] netfilter: ebtables: fix memory leak when blob is malformed 1 (1) 2022/09/20 12:20
[syzbot] memory leak in do_replace 0 (1) 2022/09/19 23:27
Last patch testing requests (2)
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 OK

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