Return ULONG_MAX for values that don't fit an unsigned long.
proc_int_u2k_conv_uop() now correctly rejects a result above INT_MAX.
This is the erroneous behaviour that is being fixed. The input has to
exceed ULONG_MAX / HZ for the product to wrap, so the value below is
specific to CONFIG_HZ=1000:
# echo 18446744073709552 > /proc/sys/net/ipv4/tcp_keepalive_time
# cat /proc/sys/net/ipv4/tcp_keepalive_time
0
That value is now rejected with an error.
The original bound ("*u_ptr > INT_MAX / HZ") was removed in commit
2dc164a48e ("sysctl: Create converter functions with two new macros").
Fixes: 2dc164a48e ("sysctl: Create converter functions with two new macros")
Cc: [email protected]
Signed-off-by: Zhan Xusheng <[email protected]>
Signed-off-by: Joel Granados <[email protected]>
Zhan Xusheng
fdd6553e1e