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ImgIoUtilReadFile: check ftell() return

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This avoids attempting to allocate 0 bytes if the call fails. (An
additional byte is added to the result to allow a '\0' to be appended.)

Bug: chromium:334120888
Change-Id: Ifcb8ff7744c567cbd08051aa04cc66acf936078d
This commit is contained in:
James Zern 2024-04-19 12:44:43 -07:00
parent dc9505855e
commit 3cada4cef4
1 changed files with 5 additions and 0 deletions
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5
imageio/imageio_util.c
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@ -89,6 +89,11 @@ int ImgIoUtilReadFile(const char* const file_name,
} }
fseek(in, 0, SEEK_END); fseek(in, 0, SEEK_END);
file_size = ftell(in); file_size = ftell(in);
if (file_size == (size_t)-1) {
fclose(in);
WFPRINTF(stderr, "error getting size of '%s'\n", (const W_CHAR*)file_name);
return 0;
}
fseek(in, 0, SEEK_SET); fseek(in, 0, SEEK_SET);
// we allocate one extra byte for the \0 terminator // we allocate one extra byte for the \0 terminator
file_data = (uint8_t*)WebPMalloc(file_size + 1); file_data = (uint8_t*)WebPMalloc(file_size + 1);