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| author |   Ivan Delalande <colona@arista.com> | 2018-12-13 15:20:52 -0800 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2018-12-13 20:59:44 -0500 |
| commit | ea5751ccd665a2fd1b24f9af81f6167f0718c5f6 (patch) | |
| tree | 1cc50a3dbdf449f104a3cb4295ed84193607180c /Documentation/devicetree/bindings | |
| parent | aio: fix spectre gadget in lookup_ioctx (diff) | |
| download | linux-dev-ea5751ccd665a2fd1b24f9af81f6167f0718c5f6.tar.xz linux-dev-ea5751ccd665a2fd1b24f9af81f6167f0718c5f6.zip | |
proc/sysctl: don't return ENOMEM on lookup when a table is unregistering
proc_sys_lookup can fail with ENOMEM instead of ENOENT when the
corresponding sysctl table is being unregistered. In our case we see
this upon opening /proc/sys/net/*/conf files while network interfaces
are being deleted, which confuses our configuration daemon.
The problem was successfully reproduced and this fix tested on v4.9.122
and v4.20-rc6.
v2: return ERR_PTRs in all cases when proc_sys_make_inode fails instead
of mixing them with NULL. Thanks Al Viro for the feedback.
Fixes: ace0c791e6c3 ("proc/sysctl: Don't grab i_lock under sysctl_lock.")
Cc: stable@vger.kernel.org
Signed-off-by: Ivan Delalande <colona@arista.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'Documentation/devicetree/bindings')
0 files changed, 0 insertions, 0 deletions