diff mbox series

[net,05/12] netrom: Fix a data-race around sysctl_netrom_transport_maximum_tries

Message ID 20240304082046.64977-6-kerneljasonxing@gmail.com (mailing list archive)
State Accepted
Commit e799299aafed417cc1f32adccb2a0e5268b3f6d5
Delegated to: Netdev Maintainers
Headers show
Series netrom: Fix all the data-races around sysctls | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 956 this patch: 956
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 972 this patch: 972
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 972 this patch: 972
netdev/checkpatch warning WARNING: line length of 83 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-03-05--21-00 (tests: 892)

Commit Message

Jason Xing March 4, 2024, 8:20 a.m. UTC 
From: Jason Xing <kernelxing@tencent.com>

We need to protect the reader reading the sysctl value because the
value can be changed concurrently.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
---
 net/netrom/af_netrom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 4d0e0834d527..312fc745db7f 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -457,7 +457,7 @@  static int nr_create(struct net *net, struct socket *sock, int protocol,
 	nr->t2     =
 		msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
 	nr->n2     =
-		msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
+		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_maximum_tries));
 	nr->t4     =
 		msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
 	nr->idle   =