Fix Integer overflow in binary CPIO handler#5089
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sectroyer wants to merge 1 commit intoMidnightCommander:masterfrom
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Fix Integer overflow in binary CPIO handler#5089sectroyer wants to merge 1 commit intoMidnightCommander:masterfrom
sectroyer wants to merge 1 commit intoMidnightCommander:masterfrom
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area: vfs
…ndler Add a bounds check on st_size immediately after it is computed, before it is used in any arithmetic or allocation. A reasonable upper bound for a symlink target is MC_MAXPATHLEN (4096). Signed-off-by: Michał Majchrowicz <sectroyer@gmail.com> Signed-off-by: Yury V. Zaytsev <yury@shurup.com>
mc-worker
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Apr 16, 2026
| // case? | ||
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| inode->linkname = g_malloc (st->st_size + 1); | ||
| if (st->st_size < 0 || (gsize) st->st_size >= G_MAXSIZE) |
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Why do you reduce off_t to gsize? I think, sizeof (off_t) >= sizeof (gsize), so the correct way is
st->st_size >= (off_t) G_MAXSIZE
| #endif | ||
| st.st_size = ((off_t) u.buf.c_filesizes[0] << 16) | u.buf.c_filesizes[1]; | ||
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| if (st.st_size < 0 || st.st_size > MC_MAXPATHLEN) |
Contributor
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Why do you compare file size with path length? It is correct for link not for regular file,
| u.st.st_size = hd.c_filesize; | ||
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| if (u.st.st_size < 0 || u.st.st_size > MC_MAXPATHLEN) | ||
| { |
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Add a bounds check on st_size immediately after it is computed, before it is used in any arithmetic or allocation. A reasonable upper bound for a symlink target is MC_MAXPATHLEN (4096).