Tamizh chelvam <tamizhr@xxxxxxxxxxxxxx> writes: > When attempt to read tpc_stats for the chipsets which support > more than 3 tx chain will trigger kernel panic(kernel stack is corrupted) > due to writing values on rate_code array out of range. > This patch changes the array size depends on the WMI_TPC_TX_N_CHAIN and > added check to avoid write values on the array if the num tx chain > get in tpc config event is greater than WMI_TPC_TX_N_CHAIN. > > Tested on QCA9984 with firmware-5.bin_10.4-3.5.3-00057 > > Kernel panic log : > > [ 323.510944] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: bf90c654 > [ 323.510944] > [ 323.524390] CPU: 0 PID: 1908 Comm: cat Not tainted 3.14.77 #31 > [ 323.530224] [<c021db48>] (unwind_backtrace) from [<c021ac08>] (show_stack+0x10/0x14) > [ 323.537941] [<c021ac08>] (show_stack) from [<c03c53c0>] (dump_stack+0x80/0xa0) > [ 323.545146] [<c03c53c0>] (dump_stack) from [<c022e4ac>] (panic+0x84/0x1e4) > [ 323.552000] [<c022e4ac>] (panic) from [<c022e61c>] (__stack_chk_fail+0x10/0x14) > [ 323.559350] [<c022e61c>] (__stack_chk_fail) from [<bf90c654>] (ath10k_wmi_event_pdev_tpc_config+0x424/0x438 [ath10k_core]) > [ 323.570471] [<bf90c654>] (ath10k_wmi_event_pdev_tpc_config [ath10k_core]) from [<bf90d800>] (ath10k_wmi_10_4_op_rx+0x2f0/0x39c [ath10k_core]) > [ 323.583047] [<bf90d800>] (ath10k_wmi_10_4_op_rx [ath10k_core]) from [<bf8fcc18>] (ath10k_htc_rx_completion_handler+0x170/0x1a0 [ath10k_core]) > [ 323.595702] [<bf8fcc18>] (ath10k_htc_rx_completion_handler [ath10k_core]) from [<bf961f44>] (ath10k_pci_hif_send_complete_check+0x1f0/0x220 [ath10k_pci]) > [ 323.609421] [<bf961f44>] (ath10k_pci_hif_send_complete_check [ath10k_pci]) from [<bf96562c>] (ath10k_ce_per_engine_service+0x74/0xc4 [ath10k_pci]) > [ 323.622490] [<bf96562c>] (ath10k_ce_per_engine_service [ath10k_pci]) from [<bf9656f0>] (ath10k_ce_per_engine_service_any+0x74/0x80 [ath10k_pci]) > [ 323.635423] [<bf9656f0>] (ath10k_ce_per_engine_service_any [ath10k_pci]) from [<bf96365c>] (ath10k_pci_napi_poll+0x44/0xe8 [ath10k_pci]) > [ 323.647665] [<bf96365c>] (ath10k_pci_napi_poll [ath10k_pci]) from [<c0599994>] (net_rx_action+0xac/0x160) > [ 323.657208] [<c0599994>] (net_rx_action) from [<c02324a4>] (__do_softirq+0x104/0x294) > [ 323.665017] [<c02324a4>] (__do_softirq) from [<c0232920>] (irq_exit+0x9c/0x11c) > [ 323.672314] [<c0232920>] (irq_exit) from [<c0217fc0>] (handle_IRQ+0x6c/0x90) > [ 323.679341] [<c0217fc0>] (handle_IRQ) from [<c02084e0>] (gic_handle_irq+0x3c/0x60) > [ 323.686893] [<c02084e0>] (gic_handle_irq) from [<c02095c0>] (__irq_svc+0x40/0x70) > [ 323.694349] Exception stack(0xdd489c58 to 0xdd489ca0) > [ 323.699384] 9c40: 00000000 a0000013 > [ 323.707547] 9c60: 00000000 dc4bce40 60000013 ddc1d800 dd488000 00000990 00000000 c085c800 > [ 323.715707] 9c80: 00000000 dd489d44 0000092d dd489ca0 c026e664 c026e668 60000013 ffffffff > [ 323.723877] [<c02095c0>] (__irq_svc) from [<c026e668>] (rcu_note_context_switch+0x170/0x184) > [ 323.732298] [<c026e668>] (rcu_note_context_switch) from [<c020e928>] (__schedule+0x50/0x4d4) > [ 323.740716] [<c020e928>] (__schedule) from [<c020e490>] (schedule_timeout+0x148/0x178) > [ 323.748611] [<c020e490>] (schedule_timeout) from [<c020f804>] (wait_for_common+0x114/0x154) > [ 323.756972] [<c020f804>] (wait_for_common) from [<bf8f6ef0>] (ath10k_tpc_stats_open+0xc8/0x340 [ath10k_core]) > [ 323.766873] [<bf8f6ef0>] (ath10k_tpc_stats_open [ath10k_core]) from [<c02bb598>] (do_dentry_open+0x1ac/0x274) > [ 323.776741] [<c02bb598>] (do_dentry_open) from [<c02c838c>] (do_last+0x8c0/0xb08) > [ 323.784201] [<c02c838c>] (do_last) from [<c02c87e4>] (path_openat+0x210/0x598) > [ 323.791408] [<c02c87e4>] (path_openat) from [<c02c9d1c>] (do_filp_open+0x2c/0x78) > [ 323.798873] [<c02c9d1c>] (do_filp_open) from [<c02bc85c>] (do_sys_open+0x114/0x1b4) > [ 323.806509] [<c02bc85c>] (do_sys_open) from [<c0208c80>] (ret_fast_syscall+0x0/0x44) > [ 323.814241] CPU1: stopping > [ 323.816927] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.14.77 #31 > [ 323.823008] [<c021db48>] (unwind_backtrace) from [<c021ac08>] (show_stack+0x10/0x14) > [ 323.830731] [<c021ac08>] (show_stack) from [<c03c53c0>] (dump_stack+0x80/0xa0) > [ 323.837934] [<c03c53c0>] (dump_stack) from [<c021cfac>] (handle_IPI+0xb8/0x140) > [ 323.845224] [<c021cfac>] (handle_IPI) from [<c02084fc>] (gic_handle_irq+0x58/0x60) > [ 323.852774] [<c02084fc>] (gic_handle_irq) from [<c02095c0>] (__irq_svc+0x40/0x70) > [ 323.860233] Exception stack(0xdd499fa0 to 0xdd499fe8) > [ 323.865273] 9fa0: ffffffed 00000000 1d3c9000 00000000 dd498000 dd498030 10c0387d c08b62c8 > [ 323.873432] 9fc0: 4220406a 512f04d0 00000000 00000000 00000001 dd499fe8 c021838c c0218390 > [ 323.881588] 9fe0: 60000013 ffffffff > [ 323.885070] [<c02095c0>] (__irq_svc) from [<c0218390>] (arch_cpu_idle+0x30/0x50) > [ 323.892454] [<c0218390>] (arch_cpu_idle) from [<c026500c>] (cpu_startup_entry+0xa4/0x108) > [ 323.900690] [<c026500c>] (cpu_startup_entry) from [<422085a4>] (0x422085a4) > > Signed-off-by: Tamizh chelvam <tamizhr@xxxxxxxxxxxxxx> In v1 kbuild reported this warning: drivers/net/wireless/ath/ath10k/wmi.c:4465:14: error: 'struct ath10k' has no member named 'debug' Did you fix it? > @@ -4455,6 +4461,8 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb) > __le32_to_cpu(ev->twice_max_rd_power) / 2, > __le32_to_cpu(ev->num_tx_chain), > __le32_to_cpu(ev->rate_max)); > +exit: > + complete(&ar->debug.tpc_complete); > } And why do you need this anyway? The commit log doesn't explain that. -- Kalle Valo
