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authorJim Meyering <meyering@redhat.com>2012-04-25 15:24:17 -0400
committerJosef Bacik <josef@redhat.com>2012-05-30 10:23:32 -0400
commitf60d16a8923201bb27ad7c09016abab2818cf8ce (patch)
tree7bb7f019dad20883b01cb7689d80195d483e37a4 /fs/super.c
parenta27202fbe92b12eec895c36644440175de01d7a6 (diff)
Btrfs: avoid buffer overrun in mount option handling
There is an off-by-one error: allocating room for a maximal result string but without room for a trailing NUL. That, can lead to returning a transformed string that is not NUL-terminated, and then to a caller reading beyond end of the malloc'd buffer. Rewrite to s/kzalloc/kmalloc/, remove unwarranted use of strncpy (the result is guaranteed to fit), remove dead strlen at end, and change a few variable names and comments. Reviewed-by: Josef Bacik <josef@redhat.com> Signed-off-by: Jim Meyering <meyering@redhat.com>
Diffstat (limited to 'fs/super.c')
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