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authorBP, Praveen <praveenbp@ti.com>2006-12-06 20:39:09 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:42 -0800
commitbd9b0bac6f601655044fc35978e26231dffee03e (patch)
treeb6cc16149e406704e1e124aa159671beb63b7a56 /net/tipc/Makefile
parent36499dc2bc8025bc931a0fb22bbe0ac0e46ffb14 (diff)
[PATCH] sysctl: string length calculated is wrong if it contains negative numbers
In the functions do_proc_dointvec() and do_proc_doulongvec_minmax(), there seems to be a bug in string length calculation if string contains negative integer. The console log given below explains the bug. Setting negative values may not be a right thing to do for "console log level" but then the test (given below) can be used to demonstrate the bug in the code. # echo "-1 -1 -1 -123456" > /proc/sys/kernel/printk # cat /proc/sys/kernel/printk -1 -1 -1 -1234 # # echo "-1 -1 -1 123456" > /proc/sys/kernel/printk # cat /proc/sys/kernel/printk -1 -1 -1 1234 # (akpm: the bug is that 123456 gets truncated) It works as expected if string contains all +ve integers # echo "1 2 3 4" > /proc/sys/kernel/printk # cat /proc/sys/kernel/printk 1 2 3 4 # The patch given below fixes the issue. Signed-off-by: Praveen BP <praveenbp@ti.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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