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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-02-27 09:38:22 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-02-27 09:38:22 +0100 |
| commit | 6f3d68bc8b46bdc7b0f5f43918744d99746672a2 (patch) | |
| tree | d9365811470b28b313e78da59c6f44d75309983d /libstore | |
| parent | 78a45f762d19b6b3079951f471f8811744f2bd81 (diff) | |
| download | hurd-6f3d68bc8b46bdc7b0f5f43918744d99746672a2.tar.gz hurd-6f3d68bc8b46bdc7b0f5f43918744d99746672a2.tar.bz2 hurd-6f3d68bc8b46bdc7b0f5f43918744d99746672a2.zip | |
libstore: Fix zero store size computation
56d065041793 ("libstore: Fix undefined behavior") missed letting the sign
bit be 0, thus leading to a negative store size, and thus /dev/zero
would reject any read/write.
Diffstat (limited to 'libstore')
| -rw-r--r-- | libstore/zero.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libstore/zero.c b/libstore/zero.c index 2960c18a..b35d29a5 100644 --- a/libstore/zero.c +++ b/libstore/zero.c @@ -150,8 +150,9 @@ zero_open (const char *name, int flags, } else { - store_offset_t max_offs = ~((store_offset_t)1 - << (CHAR_BIT * sizeof (store_offset_t) - 2)); + store_offset_t max_offs = ( + ((store_offset_t)1 << (CHAR_BIT * sizeof (store_offset_t) - 2)) + - 1) * 2 + 1; return store_zero_create (max_offs, flags, store); } } |