diff options
| author | Eric Dumazet <edumazet@google.com> | 2021-08-11 12:57:15 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-08-11 15:54:10 -0700 |
| commit | b69dd5b3780a7298bd893816a09da751bc0636f7 (patch) | |
| tree | 0c4a94d50ac5dc9f09a84b630c88b60b7e77279a | |
| parent | 0271824d9ebe945a2ecefdb87e1ce0a520be704d (diff) | |
net: igmp: increase size of mr_ifc_count
Some arches support cmpxchg() on 4-byte and 8-byte only.
Increase mr_ifc_count width to 32bit to fix this problem.
Fixes: 4a2b285e7e10 ("net: igmp: fix data-race in igmp_ifc_timer_expire()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210811195715.3684218-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/linux/inetdevice.h | 2 | ||||
| -rw-r--r-- | net/ipv4/igmp.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h index 53aa0343bf69..aaf4f1b4c277 100644 --- a/include/linux/inetdevice.h +++ b/include/linux/inetdevice.h @@ -41,7 +41,7 @@ struct in_device { unsigned long mr_qri; /* Query Response Interval */ unsigned char mr_qrv; /* Query Robustness Variable */ unsigned char mr_gq_running; - unsigned char mr_ifc_count; + u32 mr_ifc_count; struct timer_list mr_gq_timer; /* general query timer */ struct timer_list mr_ifc_timer; /* interface change timer */ diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index a51360087b19..00576bae183d 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -803,7 +803,7 @@ static void igmp_gq_timer_expire(struct timer_list *t) static void igmp_ifc_timer_expire(struct timer_list *t) { struct in_device *in_dev = from_timer(in_dev, t, mr_ifc_timer); - u8 mr_ifc_count; + u32 mr_ifc_count; igmpv3_send_cr(in_dev); restart: |