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memory leak in create_pipe_files

Status: upstream: reported C repro on 2020/07/15 08:39
Reported-by: syzbot+6a137efd811917e8b53c@syzkaller.appspotmail.com
First crash: 809d, last: 458d
Patch testing requests:
Created Duration User Patch Repo Result
2021/04/10 23:39 16m phil@philpotter.co.uk https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK
2020/09/23 17:56 13m anant.thazhemadam@gmail.com upstream report log

Sample crash report:
BUG: memory leak
unreferenced object 0xffff88811141d500 (size 232):
  comm "kworker/u4:5", pid 8402, jiffies 4294943667 (age 12.510s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    60 ba 04 01 81 88 ff ff c0 39 54 0f 81 88 ff ff  `........9T.....
  backtrace:
    [<ffffffff8154ad9f>] kmem_cache_zalloc include/linux/slab.h:674 [inline]
    [<ffffffff8154ad9f>] __alloc_file+0x1f/0xf0 fs/file_table.c:101
    [<ffffffff8154b4d9>] alloc_empty_file+0x69/0x120 fs/file_table.c:150
    [<ffffffff8154b5c3>] alloc_file+0x33/0x1b0 fs/file_table.c:192
    [<ffffffff8154b7f2>] alloc_file_pseudo+0xb2/0x140 fs/file_table.c:232
    [<ffffffff81559ee8>] create_pipe_files+0x138/0x2e0 fs/pipe.c:911
    [<ffffffff8126cad3>] umd_setup+0x33/0x220 kernel/usermode_driver.c:104
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff8881101321f8 (size 24):
  comm "kworker/u4:5", pid 8402, jiffies 4294943667 (age 12.510s)
  hex dump (first 24 bytes):
    00 00 00 00 00 00 00 00 b0 0e 94 00 81 88 ff ff  ................
    00 00 00 00 00 00 00 00                          ........
  backtrace:
    [<ffffffff820e2ada>] kmem_cache_zalloc include/linux/slab.h:674 [inline]
    [<ffffffff820e2ada>] lsm_file_alloc security/security.c:569 [inline]
    [<ffffffff820e2ada>] security_file_alloc+0x2a/0xb0 security/security.c:1470
    [<ffffffff8154addd>] __alloc_file+0x5d/0xf0 fs/file_table.c:106
    [<ffffffff8154b4d9>] alloc_empty_file+0x69/0x120 fs/file_table.c:150
    [<ffffffff8154b5c3>] alloc_file+0x33/0x1b0 fs/file_table.c:192
    [<ffffffff8154b7f2>] alloc_file_pseudo+0xb2/0x140 fs/file_table.c:232
    [<ffffffff81559ee8>] create_pipe_files+0x138/0x2e0 fs/pipe.c:911
    [<ffffffff8126cad3>] umd_setup+0x33/0x220 kernel/usermode_driver.c:104
    [<ffffffff812535d4>] call_usermodehelper_exec_async+0xb4/0x1b0 kernel/umh.c:101
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Crashes (38):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-gce-leak 2021/03/21 13:02 upstream 812da4d39463 17810eae .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/18 03:10 upstream 6417f03132a6 fdb2bb2c .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/16 06:51 upstream 1a4431a5db2b fdb2bb2c .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/13 11:16 upstream f296bfd5cd04 4a003785 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/12 15:14 upstream f78d76e72a46 429d8a6b .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/02 02:18 upstream 7a7fd0de4a98 183afb6c .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/26 12:45 upstream 2c87f7a38f93 76f7fc95 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/20 10:07 upstream f40ddce88593 f689d40a .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/20 06:46 upstream f40ddce88593 f689d40a .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/15 03:55 upstream f40ddce88593 98682e5e .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/13 17:53 upstream c6d8570e4d64 98682e5e .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/13 01:25 upstream dcc0b49040c7 98682e5e .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/12 17:11 upstream dcc0b49040c7 a5f86b15 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/12 03:51 upstream 291009f656e8 a5f86b15 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/10 11:34 upstream e0756cfc7d7c 2bd9619f .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/09 10:34 upstream e0756cfc7d7c 2bd9619f .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/09 06:44 upstream e0756cfc7d7c 2bd9619f .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/08 13:51 upstream 92bf22614b21 2ce644fc .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/08 09:32 upstream b75dba7f472c 2ce644fc .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/08 07:52 upstream b75dba7f472c 2ce644fc .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/07 03:08 upstream 964d069f93c4 0655e081 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/06 18:49 upstream 1e0d27fce010 0655e081 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/06 06:56 upstream 1e0d27fce010 23a562df .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/04 16:16 upstream 61556703b610 42b90a7c .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/03 14:54 upstream 3aaf0a27ffc2 624dad51 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/03 08:10 upstream 3aaf0a27ffc2 624dad51 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/03 03:58 upstream 3aaf0a27ffc2 624dad51 .config log report syz C memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/27 10:53 upstream 625acffd7ae2 9d2ab5df .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/23 01:27 upstream 0c18f29aae7c aba2b2fb .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/16 14:40 upstream 94f0b2d4a1d0 c06f97ad .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/16 08:44 upstream 94f0b2d4a1d0 990d3cbe .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/15 09:57 upstream 009c9aa5be65 1ba81399 .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/10 14:26 upstream cd1245d75ce9 1ba81399 .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/06/02 09:27 upstream 231bc5390667 032639db .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/05/30 04:12 upstream 6799d4f2da49 325a8dab .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/03/03 16:06 upstream f69d02e37a85 e5b64d68 .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2021/02/21 15:56 upstream e767b3530acb 3e5ed8b4 .config log report syz memory leak in create_pipe_files
ci-upstream-gce-leak 2020/07/11 08:37 upstream a581387e415b 18d18b59 .config log report syz
* Struck through repros no longer work on HEAD.