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| author | Leah Neukirchen <leah@vuxu.org> | 2020-01-17 12:14:47 +0100 |
|---|---|---|
| committer | Leah Neukirchen <leah@vuxu.org> | 2020-01-17 12:14:47 +0100 |
| commit | 513ac7d002d196a8a3b61d8cf5ddee03cede0b94 (patch) | |
| tree | 690114b4dba7100d65f3499838d1a2e2f1b048c2 /mscan.c | |
| parent | 55035ad8b28b407f39def5c2b139a29e7e182958 (diff) | |
| download | mblaze-513ac7d002d196a8a3b61d8cf5ddee03cede0b94.tar.gz mblaze-513ac7d002d196a8a3b61d8cf5ddee03cede0b94.tar.xz mblaze-513ac7d002d196a8a3b61d8cf5ddee03cede0b94.zip | |
mscan: fix underrun in %F when filename doesn't contain three slashes
Diffstat (limited to 'mscan.c')
| -rw-r--r-- | mscan.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/mscan.c b/mscan.c index 9fd1f4d..6ae1628 100644 --- a/mscan.c +++ b/mscan.c @@ -465,13 +465,21 @@ oneline(char *file) case 'F': { char *e = file + strlen(file); + + if (!msg) + goto empty; + while (file < e && *e != '/') e--; + if (file == e) + goto empty; e--; while (file < e && *e != '/') e--; while (file < e && *e == '/') e--; + if (file == e) + goto empty; char *b = e; e++; while (file < b && *b != '/') @@ -480,6 +488,11 @@ oneline(char *file) b++; if (*b == '.') b++; + + if (0) { +empty: + b = e = ""; + } if (w) { if (w < 0) w = -w; |