memory leak in __build_skb (2)

Status: closed as invalid on 2022/10/12 18:48
Subsystems: net
[Documentation on labels]
First crash: 2533d, last: 1543d
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream memory leak in __build_skb (3) wireless 3 syz, C 2 1322d 1319d 22/29 fixed on 2023/06/08 14:41
upstream memory leak in __build_skb (4) net 3 syz, C 1 215d 212d 29/29 fixed on 2026/05/06 16:40
upstream memory leak in __build_skb net 3 syz, C 19 2611d 2640d 0/29 closed as invalid on 2019/08/12 12:07

Sample crash report:
Warning: Permanently added '10.128.0.162' (ECDSA) to the list of known hosts.
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810c916d00 (size 232):
  comm "syz-executor181", pid 3614, jiffies 4294950268 (age 12.310s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 c0 1e 0b 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff83828d81>] __build_skb+0x21/0x60 net/core/skbuff.c:239
    [<ffffffff83828dda>] build_skb+0x1a/0x180 net/core/skbuff.c:256
    [<ffffffff829dcba1>] __tun_build_skb+0x31/0x130 drivers/net/tun.c:1589
    [<ffffffff829e1dab>] tun_build_skb+0x2eb/0x6d0 drivers/net/tun.c:1713
    [<ffffffff829e26a3>] tun_get_user+0x513/0x1e00 drivers/net/tun.c:1798
    [<ffffffff829e3ffd>] tun_chr_write_iter+0x6d/0x110 drivers/net/tun.c:2015
    [<ffffffff815ba1c6>] call_write_iter include/linux/fs.h:2050 [inline]
    [<ffffffff815ba1c6>] new_sync_write+0x1a6/0x250 fs/read_write.c:504
    [<ffffffff815bd792>] vfs_write+0x372/0x420 fs/read_write.c:591
    [<ffffffff815bda7d>] ksys_write+0x9d/0x160 fs/read_write.c:644
    [<ffffffff84565f05>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84565f05>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Crashes (330):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/05/23 04:58 upstream 4b0986a3613c 7268fa62 .config console log report syz C ci-upstream-gce-leak memory leak in __build_skb
2021/01/05 17:04 upstream 36bbbd0e234d a0234d98 .config console log report syz C ci-upstream-gce-leak
2020/12/10 18:31 upstream a2f5ea9e314b f900b48c .config console log report syz C ci-upstream-gce-leak
2020/09/22 09:59 upstream 98477740630f 9e1fa68e .config console log report syz C ci-upstream-gce-leak
2020/09/21 13:13 upstream ba4f184e126b 9e1fa68e .config console log report syz C ci-upstream-gce-leak
2020/09/12 22:41 upstream 729e3d091984 ce441f06 .config console log report syz C ci-upstream-gce-leak
2020/09/12 16:52 upstream 729e3d091984 ce441f06 .config console log report syz C ci-upstream-gce-leak
2020/09/12 02:50 upstream e8878ab82545 79fb24e2 .config console log report syz C ci-upstream-gce-leak
2020/09/11 22:51 upstream e8878ab82545 79fb24e2 .config console log report syz C ci-upstream-gce-leak
2020/09/11 04:04 upstream 7fe10096c150 409809d8 .config console log report syz C ci-upstream-gce-leak
2020/09/11 00:03 upstream 7fe10096c150 409809d8 .config console log report syz C ci-upstream-gce-leak
2020/09/06 04:35 upstream 9322c47b21b9 abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/09/05 10:59 upstream c70672d8d316 abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/09/03 18:28 upstream fc3abb53250a abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/09/03 14:31 upstream fc3abb53250a abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/09/03 08:25 upstream fc3abb53250a abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/09/02 16:01 upstream 9c7d619be5a0 abf9ba4f .config console log report syz C ci-upstream-gce-leak
2020/08/31 23:09 upstream f75aef392f86 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/31 22:29 upstream f75aef392f86 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/31 11:35 upstream dcc5c6f013d8 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/31 09:32 upstream dcc5c6f013d8 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/30 06:23 upstream 1127b219ce94 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/29 16:47 upstream 4d41ead6ead9 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/29 11:11 upstream 96d454cd2c16 d5a3ae1f .config console log report syz C ci-upstream-gce-leak
2020/08/27 13:31 upstream 15bc20c6af4c 816e0689 .config console log report syz C ci-upstream-gce-leak
2020/08/26 17:01 upstream 2ac69819ba9e 318430cb .config console log report syz C ci-upstream-gce-leak
2020/08/25 23:00 upstream abb3438d69fb 344da168 .config console log report syz C ci-upstream-gce-leak
2020/08/25 21:34 upstream abb3438d69fb 344da168 .config console log report syz C ci-upstream-gce-leak
2020/08/25 05:35 upstream 6a9dc5fd6170 344da168 .config console log report syz C ci-upstream-gce-leak
2020/08/24 18:33 upstream d012a7190fc1 67b599d1 .config console log report syz C ci-upstream-gce-leak
2020/08/24 13:49 upstream d012a7190fc1 67b599d1 .config console log report syz C ci-upstream-gce-leak
2020/08/24 04:05 upstream cb95712138ec cef5ae68 .config console log report syz C ci-upstream-gce-leak
2020/08/24 03:40 upstream cb95712138ec cef5ae68 .config console log report syz C ci-upstream-gce-leak
2020/08/23 15:12 upstream c3d8f220d012 cef5ae68 .config console log report syz C ci-upstream-gce-leak
2020/08/21 19:28 upstream cd02217a5d81 6436ce4b .config console log report syz C ci-upstream-gce-leak
2020/08/21 14:56 upstream da2968ff879b 6436ce4b .config console log report syz C ci-upstream-gce-leak
2020/08/21 02:46 upstream da2968ff879b 1d75fe45 .config console log report syz C ci-upstream-gce-leak
2020/08/21 01:39 upstream da2968ff879b 1d75fe45 .config console log report syz C ci-upstream-gce-leak
2020/08/20 06:47 upstream 7eac66d0456f ed282a3a .config console log report syz C ci-upstream-gce-leak
2019/09/06 05:38 upstream 3b47fd5ca9ea 040fda58 .config console log report syz C ci-upstream-gce-leak
2020/09/21 07:40 upstream bdcf11de8f77 9564d2e9 .config console log report syz ci-upstream-gce-leak
2020/09/12 03:51 upstream e8878ab82545 79fb24e2 .config console log report syz ci-upstream-gce-leak
2020/09/08 17:28 upstream f4d51dffc6c0 abf9ba4f .config console log report syz ci-upstream-gce-leak
2020/09/06 17:38 upstream dd9fb9bb3340 abf9ba4f .config console log report syz ci-upstream-gce-leak
2020/09/05 14:59 upstream c70672d8d316 abf9ba4f .config console log report syz ci-upstream-gce-leak
2020/09/01 22:07 upstream b51594df17d0 d5a3ae1f .config console log report syz ci-upstream-gce-leak
2020/08/29 17:35 upstream 4d41ead6ead9 d5a3ae1f .config console log report syz ci-upstream-gce-leak
2020/08/28 06:29 upstream 15bc20c6af4c 816e0689 .config console log report syz ci-upstream-gce-leak
2020/08/27 14:52 upstream 15bc20c6af4c 816e0689 .config console log report syz ci-upstream-gce-leak
2020/08/25 08:49 upstream 6a9dc5fd6170 344da168 .config console log report syz ci-upstream-gce-leak
2020/08/21 06:27 upstream da2968ff879b 1d75fe45 .config console log report syz ci-upstream-gce-leak
* Struck through repros no longer work on HEAD.