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authorPing-Ke Shih2023-02-03 10:36:36 +0800
committerGreg Kroah-Hartman2023-11-28 17:06:55 +0000
commit2be24c47ac19bf639c48c082486c08888bd603c6 (patch)
tree4ac350376ead01cdeae34a15a4ef9870317415e7 /drivers/net/ipa/ipa_sysfs.c
parent9c2e4a81d3e749800204187e827de6dd82d13572 (diff)
wifi: mac80211: don't return unset power in ieee80211_get_tx_power()
[ Upstream commit e160ab85166e77347d0cbe5149045cb25e83937f ] We can get a UBSAN warning if ieee80211_get_tx_power() returns the INT_MIN value mac80211 internally uses for "unset power level". UBSAN: signed-integer-overflow in net/wireless/nl80211.c:3816:5 -2147483648 * 100 cannot be represented in type 'int' CPU: 0 PID: 20433 Comm: insmod Tainted: G WC OE Call Trace: dump_stack+0x74/0x92 ubsan_epilogue+0x9/0x50 handle_overflow+0x8d/0xd0 __ubsan_handle_mul_overflow+0xe/0x10 nl80211_send_iface+0x688/0x6b0 [cfg80211] [...] cfg80211_register_wdev+0x78/0xb0 [cfg80211] cfg80211_netdev_notifier_call+0x200/0x620 [cfg80211] [...] ieee80211_if_add+0x60e/0x8f0 [mac80211] ieee80211_register_hw+0xda5/0x1170 [mac80211] In this case, simply return an error instead, to indicate that no data is available. Cc: Zong-Zhe Yang <kevin_yang@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://lore.kernel.org/r/20230203023636.4418-1-pkshih@realtek.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/ipa/ipa_sysfs.c')
0 files changed, 0 insertions, 0 deletions