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zram: free secondary algorithms names

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[ Upstream commit 684826f827 ]

We need to kfree() secondary algorithms names when reset zram device that
had multi-streams, otherwise we leak memory.

[senozhatsky@chromium.org: kfree(NULL) is legal]
  Link: https://lkml.kernel.org/r/20240917013021.868769-1-senozhatsky@chromium.org
Link: https://lkml.kernel.org/r/20240911025600.3681789-1-senozhatsky@chromium.org
Fixes: 001d927357 ("zram: add recompression algorithm sysfs knob")
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sergey Senozhatsky 2024-10-09 13:51:39 +09:00 committed by Greg Kroah-Hartman
parent c556e72cea
commit 6272936fd2
1 changed files with 5 additions and 0 deletions
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5
drivers/block/zram/zram_drv.c
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@ -1983,6 +1983,11 @@ static void zram_destroy_comps(struct zram *zram)
zcomp_destroy(comp); zcomp_destroy(comp);
zram->num_active_comps--; zram->num_active_comps--;
} }
for (prio = ZRAM_SECONDARY_COMP; prio < ZRAM_MAX_COMPS; prio++) {
kfree(zram->comp_algs[prio]);
zram->comp_algs[prio] = NULL;
}
} }
static void zram_reset_device(struct zram *zram) static void zram_reset_device(struct zram *zram)