CVE-2023-53622
HighSummary
W jądrze systemu Linux naprawiono podatność związaną z możliwymi wyścigami danych w funkcji gfs2_show_options(). Niektóre pola struktury gfs2_tune były dostępne bez trzymania odpowiedniego blokady, co mogło prowadzić do problemów przy równoczesnym wykonywaniu funkcji gfs2_show_options() i gfs2_reconfigure().
Risk Assessment
Brak odpowiedniej synchronizacji dostępu do danych może prowadzić do nieprzewidywalnych zachowań systemu, co z kolei może wpłynąć na stabilność i integralność danych w środowisku produkcyjnym.
Recommendation
Zaleca się aktualizację jądra systemu Linux do wersji zawierającej poprawkę, aby zminimalizować ryzyko wystąpienia wyścigów danych oraz zapewnić stabilność systemu.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix possible data races in gfs2_show_options() Some fields such as gt_logd_secs of the struct gfs2_tune are accessed without holding the lock gt_spin in gfs2_show_options(): val = sdp->sd_tune.gt_logd_secs; if (val != 30) seq_printf(s, ",commit=%d", val); And thus can cause data races when gfs2_show_options() and other functions such as gfs2_reconfigure() are concurrently executed: spin_lock(>->gt_spin); gt->gt_logd_secs = newargs->ar_commit; To fix these possible data races, the lock sdp->sd_tune.gt_spin is acquired before accessing the fields of gfs2_tune and released after these accesses. Further changes by Andreas: - Don't hold the spin lock over the seq_printf operations.

