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| author | Allan McRae <allan@archlinux.org> | 2012-01-31 18:11:47 +0100 |
|---|---|---|
| committer | Dan McGee <dan@archlinux.org> | 2012-01-31 18:22:30 +0100 |
| commit | fcbae69fe81d080478bbd9809af5696bbbfe9d95 (patch) | |
| tree | 1fc1afc5d45baf6d41f06a34b1f3f2dcf46c8f15 /lib/libalpm/alpm_list.c | |
| parent | 9d1e8084dfa0a1ebae6c37e3b839289cb905116f (diff) | |
| download | pacman-fcbae69fe81d080478bbd9809af5696bbbfe9d95.tar.gz pacman-fcbae69fe81d080478bbd9809af5696bbbfe9d95.tar.xz | |
Fix rare segfault on package removal
Very rarely a segfault would occur when removing a number of packages
due to a corrupted list for the local database (FS#27805, FS#28195).
This was caused by the alpm_list_msort function not correctly dealing
with the two new head node's prev values.
Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/alpm_list.c')
| -rw-r--r-- | lib/libalpm/alpm_list.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/libalpm/alpm_list.c b/lib/libalpm/alpm_list.c index 15286aa1..3aa4f9bc 100644 --- a/lib/libalpm/alpm_list.c +++ b/lib/libalpm/alpm_list.c @@ -279,8 +279,11 @@ alpm_list_t SYMEXPORT *alpm_list_msort(alpm_list_t *list, size_t n, alpm_list_fn alpm_list_t *left = list; alpm_list_t *lastleft = alpm_list_nth(list, n/2 - 1); alpm_list_t *right = lastleft->next; - /* terminate first list */ + + /* tidy new lists */ lastleft->next = NULL; + right->prev = left->prev; + left->prev = lastleft; left = alpm_list_msort(left, n/2, fn); right = alpm_list_msort(right, n - (n/2), fn); |