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Linux 6.10 compat: Fix zvol NULL pointer deference 

zvol_alloc_non_blk_mq()->blk_queue_set_write_cache() needs the disk
queue setup to prevent a NULL pointer deference.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #16453
This commit is contained in:
Tony Hutter 2024-08-15 14:05:58 -07:00
parent 9d64d1bfad
commit 84a9861536
1 changed files with 4 additions and 3 deletions
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7
module/os/linux/zfs/zvol_os.c
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@ -1216,13 +1216,14 @@ zvol_alloc_non_blk_mq(struct zvol_state_os *zso, zvol_queue_limits_t *limits)
return (1); return (1);
} }
zso->zvo_disk = disk;
zso->zvo_disk->minors = ZVOL_MINORS;
zso->zvo_queue = zso->zvo_disk->queue;
#ifndef HAVE_BLKDEV_QUEUE_LIMITS_FEATURES #ifndef HAVE_BLKDEV_QUEUE_LIMITS_FEATURES
blk_queue_set_write_cache(zso->zvo_queue, B_TRUE); blk_queue_set_write_cache(zso->zvo_queue, B_TRUE);
#endif #endif
zso->zvo_disk = disk;
zso->zvo_disk->minors = ZVOL_MINORS;
zso->zvo_queue = zso->zvo_disk->queue;
#else #else
zso->zvo_queue = blk_alloc_queue(NUMA_NO_NODE); zso->zvo_queue = blk_alloc_queue(NUMA_NO_NODE);
if (zso->zvo_queue == NULL) if (zso->zvo_queue == NULL)