Commits
Amitkumar Karwar committed 16d25da94f3
mwifiex: fix NULL pointer dereference during suspend This patch fixes below NULL pointer dereference observed in suspend stress test. When scan is cancelled during system suspend, we may end up aceesing "priv->scan_request" in corner case. [ 3035.304682] BUG: KASAN: null-ptr-deref on address 0000000000000008 [ 3035.304704] Read of size 4 by task ksdioirqd/mmc2/1183 [ 3035.304744] CPU: 0 PID: 1183 Comm: ksdioirqd/mmc2 Tainted: G W 3.18.0 #1169 [ 3035.304772] Call trace: [ 3035.304825] [<ffffffc00020a520>] dump_backtrace+0x0/0x190 [ 3035.304864] [<ffffffc00020a6cc>] show_stack+0x1c/0x28 [ 3035.304901] [<ffffffc000b36db8>] dump_stack+0xa0/0xf8 [ 3035.304940] [<ffffffc00039c494>] kasan_report+0x120/0x4fc [ 3035.304975] [<ffffffc00039b6b4>] __asan_load4+0x20/0x80 [ 3035.305546] [<ffffffbffc1f5aec>] mwifiex_check_next_scan_command+0x1a4/0x588 [mwifiex] [ 3035.306091] [<ffffffbffc1f7aec>] mwifiex_handle_event_ext_scan_report+0x304/0x370 [mwifiex] [ 3035.306735] [<ffffffbffc206bb8>] mwifiex_process_sta_event+0x6c0/0xf10 [mwifiex] [ 3035.307200] [<ffffffbffc1e609c>] mwifiex_process_event+0x2f4/0x358 [mwifiex] [ 3035.307612] [<ffffffbffc1e25c8>] mwifiex_main_process+0x3cc/0x80c [mwifiex] [ 3035.307737] [<ffffffbffc2523a0>] mwifiex_sdio_interrupt+0x198/0x1c0 [mwifiex_sdio] [ 3035.307785] [<ffffffc0008d9250>] process_sdio_pending_irqs+0x15c/0x1d4 [ 3035.307826] [<ffffffc0008d93f0>] sdio_irq_thread+0xd8/0x288 Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>