sysctl: returns -EINVAL when a negative value is passed to proc_doulongvec_minmax
Merge Request Required Information
Summary of Changes
Bugzilla: https://bugzilla.redhat.com/2121392
Upstream Status: backport from upstream
Tested: simple cmdline test
commit 1622ed7d0743201293094162c26019d2573ecacb
Author: Baokun Li <libaokun1@huawei.com>
Date: Fri Jan 21 22:13:48 2022 -0800
sysctl: returns -EINVAL when a negative value is passed to proc_doulongvec_minmax
When we pass a negative value to the proc_doulongvec_minmax() function,
the function returns 0, but the corresponding interface value does not
change.
we can easily reproduce this problem with the following commands:
cd /proc/sys/fs/epoll
echo -1 > max_user_watches; echo $?; cat max_user_watches
This function requires a non-negative number to be passed in, so when a
negative number is passed in, -EINVAL is returned.
Link: https://lkml.kernel.org/r/20211220092627.3744624-1-libaokun1@huawei.com
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Jozef Bacik jobacik@redhat.com
Signed-off-by: Vratislav Bendel vbendel@redhat.com
Approved Bugzilla Ticket
Bugzilla: https://bugzilla.redhat.com/2121392