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[PATCH] add check to /proc/devices read routines

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Patch to add check to get_chrdev_list and get_blkdev_list to prevent reads
of /proc/devices from spilling over the provided page if more than 4096
bytes of string data are generated from all the registered character and
block devices in a system

Signed-off-by: Neil Horman <nhorman@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Neil Horman
2005-06-23 00:09:11 -07:00
committed by Linus Torvalds
parent 3bc1ee3e8f
commit ac20427ef6
4 changed files with 24 additions and 5 deletions
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include/linux/genhd.h
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@@ -224,7 +224,7 @@ static inline void free_disk_stats(struct gendisk *disk)
extern void disk_round_stats(struct gendisk *disk);
/* drivers/block/genhd.c */
extern int get_blkdev_list(char *);
extern int get_blkdev_list(char *, int);
extern void add_disk(struct gendisk *disk);
extern void del_gendisk(struct gendisk *gp);
extern void unlink_gendisk(struct gendisk *gp);