Re: [PATCH 5.4 000/328] 5.4.291-rc1 review

[Florian Fainelli <f.fainelli@gmail.com>]

On 3/11/25 07:56, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.4.291 release.
> There are 328 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Thu, 13 Mar 2025 14:56:14 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.4.291-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

On ARCH_BRCMSTB using 32-bit and 64-bit ARM kernels, build tested on 
BMIPS_GENERIC:

Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>

Please note that "udp: gso: do not drop small packets when PMTU reduces" 
does cause the following build warning:

In file included from ./include/linux/uio.h:8,
                  from ./include/linux/socket.h:8,
                  from net/ipv6/udp.c:22:
net/ipv6/udp.c: In function 'udp_v6_send_skb':
./include/linux/kernel.h:843:43: warning: comparison of distinct pointer 
types lacks a cast
   843 |                 (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
       |                                           ^~
./include/linux/kernel.h:857:18: note: in expansion of macro '__typecheck'
   857 |                 (__typecheck(x, y) && __no_side_effects(x, y))
       |                  ^~~~~~~~~~~
./include/linux/kernel.h:867:31: note: in expansion of macro '__safe_cmp'
   867 |         __builtin_choose_expr(__safe_cmp(x, y), \
       |                               ^~~~~~~~~~
./include/linux/kernel.h:876:25: note: in expansion of macro '__careful_cmp'
   876 | #define min(x, y)       __careful_cmp(x, y, <)
       |                         ^~~~~~~~~~~~~
net/ipv6/udp.c:1144:28: note: in expansion of macro 'min'
  1144 |                 if (hlen + min(datalen, cork->gso_size) > 
cork->fragsize) {
       |

we need a more targeting fix for 5.4 which replaces the use of min, with 
min_t:

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 58793dd7ac2c..db948e3a9bdc 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1141,7 +1141,7 @@ static int udp_v6_send_skb(struct sk_buff *skb, 
struct flowi6 *fl6,
                 const int hlen = skb_network_header_len(skb) +
                                  sizeof(struct udphdr);

-               if (hlen + min(datalen, cork->gso_size) > cork->fragsize) {
+               if (hlen + min_t(int, datalen, cork->gso_size) > 
cork->fragsize) {
                         kfree_skb(skb);
                         return -EMSGSIZE;
                 }

Thanks!
-- 
Florian