| Submitter | Enrico Scholz |
|---|---|
| Date | June 24, 2010, 1:02 p.m. |
| Message ID | <1277384560-15329-1-git-send-email-enrico.scholz@sigma-chemnitz.de> |
| Download | mbox | patch |
| Permalink | /patch/56788/ |
| State | New |
| Headers | show |
Comments
Patch
diff --git a/compr_rtime.c b/compr_rtime.c index 131536c..5613963 100644 --- a/compr_rtime.c +++ b/compr_rtime.c @@ -32,7 +32,7 @@ static int jffs2_rtime_compress(unsigned char *data_in, unsigned char *cpage_out memset(positions,0,sizeof(positions)); - while (pos < (*sourcelen) && outpos <= (*dstlen)-2) { + while (pos < (*sourcelen) && outpos+2 <= (*dstlen)) { int backpos, runlen=0; unsigned char value;
When '*dstlen' is 0 or 1, comparison will return wrong result. Reported by valgrind as ==5919== Invalid write of size 1 ==5919== at 0x40564E: jffs2_rtime_compress (compr_rtime.c:51) ==5919== by 0x40676B: jffs2_compress (compr.c:246) ==5919== by 0x403EE4: recursive_populate_directory (mkfs.jffs2.c:884) ==5919== Address 0x4e1bdb1 is 0 bytes after a block of size 1 alloc'd ==5919== at 0x4A0515D: malloc (vg_replace_malloc.c:195) ==5919== by 0x40671C: jffs2_compress (compr.c:229) ==5919== by 0x403EE4: recursive_populate_directory (mkfs.jffs2.c:884) Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de> --- compr_rtime.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)