From: Jeff King <peff@peff.net>
To: Luat Nguyen <root@l4w.io>
Cc: git@vger.kernel.org
Subject: [PATCH 2/3] ewah: drop ewah_deserialize function
Date: Thu, 14 Jun 2018 23:31:58 -0400 [thread overview]
Message-ID: <20180615033157.GB20390@sigill.intra.peff.net> (raw)
In-Reply-To: <20180615032850.GA23241@sigill.intra.peff.net>
We don't call this function, and in fact never have since it
was added (at least not in iterations of the ewah patches
that got merged). Instead we use ewah_read_mmap().
Let's drop the unused code.
Note to anybody who later wants to resurrect this: it does
not check for integer overflow in the ewah data size,
meaning it may be possible to convince the code to allocate
a too-small buffer and read() into it.
Signed-off-by: Jeff King <peff@peff.net>
---
ewah/ewah_io.c | 55 --------------------------------------------------
ewah/ewok.h | 1 -
2 files changed, 56 deletions(-)
diff --git a/ewah/ewah_io.c b/ewah/ewah_io.c
index 33c08c40f8..97c74266da 100644
--- a/ewah/ewah_io.c
+++ b/ewah/ewah_io.c
@@ -168,58 +168,3 @@ ssize_t ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len)
return ptr - (const uint8_t *)map;
}
-
-int ewah_deserialize(struct ewah_bitmap *self, int fd)
-{
- size_t i;
- eword_t dump[2048];
- const size_t words_per_dump = sizeof(dump) / sizeof(eword_t);
- uint32_t bitsize, word_count, rlw_pos;
-
- eword_t *buffer = NULL;
- size_t words_left;
-
- ewah_clear(self);
-
- /* 32 bit -- bit size for the map */
- if (read(fd, &bitsize, 4) != 4)
- return -1;
-
- self->bit_size = (size_t)ntohl(bitsize);
-
- /** 32 bit -- number of compressed 64-bit words */
- if (read(fd, &word_count, 4) != 4)
- return -1;
-
- self->buffer_size = self->alloc_size = (size_t)ntohl(word_count);
- REALLOC_ARRAY(self->buffer, self->alloc_size);
-
- /** 64 bit x N -- compressed words */
- buffer = self->buffer;
- words_left = self->buffer_size;
-
- while (words_left >= words_per_dump) {
- if (read(fd, dump, sizeof(dump)) != sizeof(dump))
- return -1;
-
- for (i = 0; i < words_per_dump; ++i, ++buffer)
- *buffer = ntohll(dump[i]);
-
- words_left -= words_per_dump;
- }
-
- if (words_left) {
- if (read(fd, dump, words_left * 8) != words_left * 8)
- return -1;
-
- for (i = 0; i < words_left; ++i, ++buffer)
- *buffer = ntohll(dump[i]);
- }
-
- /** 32 bit -- position for the RLW */
- if (read(fd, &rlw_pos, 4) != 4)
- return -1;
-
- self->rlw = self->buffer + ntohl(rlw_pos);
- return 0;
-}
diff --git a/ewah/ewok.h b/ewah/ewok.h
index 357fd93c84..7e25ca2e61 100644
--- a/ewah/ewok.h
+++ b/ewah/ewok.h
@@ -90,7 +90,6 @@ int ewah_serialize(struct ewah_bitmap *self, int fd);
int ewah_serialize_native(struct ewah_bitmap *self, int fd);
int ewah_serialize_strbuf(struct ewah_bitmap *self, struct strbuf *);
-int ewah_deserialize(struct ewah_bitmap *self, int fd);
ssize_t ewah_read_mmap(struct ewah_bitmap *self, const void *map, size_t len);
uint32_t ewah_checksum(struct ewah_bitmap *self);
--
2.18.0.rc2.534.g53d976aeb8
next prev parent reply other threads:[~2018-06-15 3:32 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-14 22:59 security: potential out-of-bound read at ewah_io.c |ewah_read_mmap| Luat Nguyen
2018-06-15 3:28 ` Jeff King
2018-06-15 3:31 ` [PATCH 1/3] ewah_read_mmap: bounds-check mmap reads Jeff King
2018-06-15 9:14 ` SZEDER Gábor
2018-06-15 16:20 ` Junio C Hamano
2018-06-15 17:10 ` SZEDER Gábor
2018-06-15 17:21 ` Jeff King
2018-06-15 19:42 ` Junio C Hamano
2018-06-15 17:05 ` Junio C Hamano
2018-06-15 17:26 ` Jeff King
2018-06-15 19:44 ` Junio C Hamano
2018-06-16 14:35 ` SZEDER Gábor
2018-06-16 19:14 ` Jeff King
2018-06-15 3:31 ` Jeff King [this message]
2018-06-15 3:32 ` [PATCH 3/3] ewah: drop ewah_serialize_native function Jeff King
2018-06-15 13:56 ` Ramsay Jones
2018-06-15 14:07 ` Ramsay Jones
2018-06-15 14:30 ` [PATCH 0/8] Delete unused methods in EWAH bitmap Derrick Stolee
2018-06-15 14:30 ` [PATCH 1/8] ewah/bitmap.c: delete unused 'bitmap_clear()' Derrick Stolee
2018-06-15 14:46 ` Ramsay Jones
2018-06-15 15:11 ` Derrick Stolee
2018-06-15 14:30 ` [PATCH 2/8] ewah/bitmap.c: delete unused 'bitmap_each_bit()' Derrick Stolee
2018-06-15 15:03 ` Ramsay Jones
2018-06-15 14:30 ` [PATCH 3/8] ewah_bitmap: delete unused 'ewah_and()' Derrick Stolee
2018-06-15 14:30 ` [PATCH 4/8] ewah_bitmap: delete unused 'ewah_and_not()' Derrick Stolee
2018-06-15 14:30 ` [PATCH 5/8] ewah_bitmap: delete unused 'ewah_not()' Derrick Stolee
2018-06-15 14:30 ` [PATCH 6/8] ewah_bitmap: delete unused 'ewah_or()' Derrick Stolee
2018-06-15 14:30 ` [PATCH 7/8] ewah_io: delete unused 'ewah_serialize()' Derrick Stolee
2018-06-15 14:30 ` [PATCH 8/8] ewah_io: delete unused 'ewah_serialize_native()' Derrick Stolee
2018-06-15 15:01 ` Ramsay Jones
2018-06-15 15:10 ` Derrick Stolee
2018-06-15 14:35 ` [PATCH 0/8] Delete unused methods in EWAH bitmap Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 0/7] " Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 1/7] ewah/bitmap.c: delete unused 'bitmap_clear()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 2/7] ewah/bitmap.c: delete unused 'bitmap_each_bit()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 3/7] ewah_bitmap: delete unused 'ewah_and()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 4/7] ewah_bitmap: delete unused 'ewah_and_not()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 5/7] ewah_bitmap: delete unused 'ewah_not()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 6/7] ewah_bitmap: delete unused 'ewah_or()' Derrick Stolee
2018-06-15 18:27 ` [PATCH v2 7/7] ewah_io: delete unused 'ewah_serialize()' Derrick Stolee
2018-06-15 18:51 ` [PATCH v2 0/7] Delete unused methods in EWAH bitmap Junio C Hamano
2018-06-15 18:56 ` Derrick Stolee
2018-06-15 19:48 ` Junio C Hamano
2018-06-15 20:35 ` Jeff King
2018-06-15 14:15 ` [PATCH 3/3] ewah: drop ewah_serialize_native function Derrick Stolee
2018-06-15 17:51 ` Jeff King
2018-06-15 18:33 ` Junio C Hamano
2018-06-15 18:46 ` Jeff King
2018-06-15 3:44 ` [PATCH 4/3] ewah: adjust callers of ewah_read_mmap() Jeff King
2018-06-15 11:23 ` Derrick Stolee
2018-06-15 16:41 ` Junio C Hamano
2018-06-15 17:31 ` Jeff King
2018-06-15 18:23 ` Derrick Stolee
2018-06-15 20:38 ` Jeff King
2018-06-15 17:12 ` Junio C Hamano
2018-06-15 16:11 ` security: potential out-of-bound read at ewah_io.c |ewah_read_mmap| Junio C Hamano
2018-06-19 19:00 ` Dyer, Edwin
2018-06-19 19:56 ` Jeff King
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