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net: igmp: increase size of mr_ifc_count
[ Upstream commitb69dd5b378
] Some arches support cmpxchg() on 4-byte and 8-byte only. Increase mr_ifc_count width to 32bit to fix this problem. Fixes:4a2b285e7e
("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> Signed-off-by: Sasha Levin <sashal@kernel.org>
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696afe28dc
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2 changed files with 2 additions and 2 deletions
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@ -41,7 +41,7 @@ struct in_device {
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unsigned long mr_qri; /* Query Response Interval */
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unsigned char mr_qrv; /* Query Robustness Variable */
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unsigned char mr_gq_running;
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unsigned char mr_ifc_count;
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u32 mr_ifc_count;
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struct timer_list mr_gq_timer; /* general query timer */
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struct timer_list mr_ifc_timer; /* interface change timer */
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@ -803,7 +803,7 @@ static void igmp_gq_timer_expire(struct timer_list *t)
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static void igmp_ifc_timer_expire(struct timer_list *t)
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{
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struct in_device *in_dev = from_timer(in_dev, t, mr_ifc_timer);
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u8 mr_ifc_count;
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u32 mr_ifc_count;
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igmpv3_send_cr(in_dev);
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restart:
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