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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-12-05 23:41:33 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-09 15:51:08 -0800 |
| commit | 72392ed0eb6fde96826cb9d66bd4f50a7ba61450 (patch) | |
| tree | 488408d7485349d5df0b3f4cca74cda5e9be4518 /Documentation | |
| parent | b7392d2247cfe6771f95d256374f1a8e6a6f48d6 (diff) | |
| download | linux-72392ed0eb6fde96826cb9d66bd4f50a7ba61450.tar.bz2 | |
kernfs: Fix kernfs_name_compare
Returning a difference from a comparison functions is usually wrong
(see acbbe6fbb240 "kcmp: fix standard comparison bug" for the long
story). Here there is the additional twist that if the void pointers
ns and kn->ns happen to differ by a multiple of 2^32,
kernfs_name_compare returns 0, falsely reporting a match to the
caller.
Technically 'hash - kn->hash' is ok since the hashes are restricted to
31 bits, but it's better to avoid that subtlety.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions