| Message ID | 1554260478-4161-1-git-send-email-wgong@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ath10k: add peer id check in ath10k_peer_find_by_id | expand |
On Wed, Apr 3, 2019 at 3:01 AM Wen Gong <wgong@codeaurora.org> wrote: > > For some SDIO chip, the peer id is 65535 for MPDU with error status, > then test_bit will trigger buffer overflow for peer's memory, if kasan > enabled, it will report error. > > Add check for overflow the size of peer's peer_ids will avoid the buffer > overflow access. > > Call trace of kasan: > dump_backtrace+0x0/0x2ec > show_stack+0x20/0x2c > __dump_stack+0x20/0x28 > dump_stack+0xc8/0xec > print_address_description+0x74/0x240 > kasan_report+0x250/0x26c > __asan_report_load8_noabort+0x20/0x2c > ath10k_peer_find_by_id+0x180/0x1e4 [ath10k_core] > ath10k_htt_t2h_msg_handler+0x100c/0x2fd4 [ath10k_core] > ath10k_htt_htc_t2h_msg_handler+0x20/0x34 [ath10k_core] > ath10k_sdio_irq_handler+0xcc8/0x1678 [ath10k_sdio] > process_sdio_pending_irqs+0xec/0x370 > sdio_run_irqs+0x68/0xe4 > sdio_irq_work+0x1c/0x28 > process_one_work+0x3d8/0x8b0 > worker_thread+0x508/0x7cc > kthread+0x24c/0x264 > ret_from_fork+0x10/0x18 > > Tested with QCA6174 SDIO with firmware > WLAN.RMH.4.4.1-00007-QCARMSWP-1. > > Signed-off-by: Wen Gong <wgong@codeaurora.org> > --- > drivers/net/wireless/ath/ath10k/txrx.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c > index 23606b6..33de9e1 100644 > --- a/drivers/net/wireless/ath/ath10k/txrx.c > +++ b/drivers/net/wireless/ath/ath10k/txrx.c > @@ -157,6 +157,9 @@ struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) > { > struct ath10k_peer *peer; > > + if (peer_id >= sizeof(peer->peer_ids) * BITS_PER_BYTE) I'd use >= BITS_PER_TYPE(peer->peer_ids). > + return NULL; > + > lockdep_assert_held(&ar->data_lock); > > list_for_each_entry(peer, &ar->peers, list)
Nicolas Boichat <drinkcat@chromium.org> writes: > On Wed, Apr 3, 2019 at 3:01 AM Wen Gong <wgong@codeaurora.org> wrote: >> >> For some SDIO chip, the peer id is 65535 for MPDU with error status, >> then test_bit will trigger buffer overflow for peer's memory, if kasan >> enabled, it will report error. >> >> Add check for overflow the size of peer's peer_ids will avoid the buffer >> overflow access. >> [...] >> --- a/drivers/net/wireless/ath/ath10k/txrx.c >> +++ b/drivers/net/wireless/ath/ath10k/txrx.c >> @@ -157,6 +157,9 @@ struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) >> { >> struct ath10k_peer *peer; >> >> + if (peer_id >= sizeof(peer->peer_ids) * BITS_PER_BYTE) > > I'd use >= BITS_PER_TYPE(peer->peer_ids). Nice, I didn't know about that. Wen, please submit v2 using this.
> -----Original Message----- > From: ath10k <ath10k-bounces@lists.infradead.org> On Behalf Of Kalle Valo > Sent: Tuesday, April 30, 2019 5:37 PM > To: Nicolas Boichat <drinkcat@chromium.org> > Cc: Claire Chang <tientzu@chromium.org>; linux-wireless@vger.kernel.org; > ath10k@lists.infradead.org; Wen Gong <wgong@codeaurora.org> > Subject: [EXT] Re: [PATCH] ath10k: add peer id check in > ath10k_peer_find_by_id > >> --- a/drivers/net/wireless/ath/ath10k/txrx.c > >> +++ b/drivers/net/wireless/ath/ath10k/txrx.c > >> @@ -157,6 +157,9 @@ struct ath10k_peer > *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) > >> { > >> struct ath10k_peer *peer; > >> > >> + if (peer_id >= sizeof(peer->peer_ids) * BITS_PER_BYTE) > > > > I'd use >= BITS_PER_TYPE(peer->peer_ids). > > Nice, I didn't know about that. Wen, please submit v2 using this. > > -- > Kalle Valo Yes, I have send v2 yesterday: [PATCH v2] ath10k: add peer id check in ath10k_peer_find_by_id > > _______________________________________________ > ath10k mailing list > ath10k@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/ath10k
Wen Gong <wgong@qti.qualcomm.com> writes: >> -----Original Message----- >> From: ath10k <ath10k-bounces@lists.infradead.org> On Behalf Of Kalle Valo >> Sent: Tuesday, April 30, 2019 5:37 PM >> To: Nicolas Boichat <drinkcat@chromium.org> >> Cc: Claire Chang <tientzu@chromium.org>; linux-wireless@vger.kernel.org; >> ath10k@lists.infradead.org; Wen Gong <wgong@codeaurora.org> >> Subject: [EXT] Re: [PATCH] ath10k: add peer id check in >> ath10k_peer_find_by_id >> >> --- a/drivers/net/wireless/ath/ath10k/txrx.c >> >> +++ b/drivers/net/wireless/ath/ath10k/txrx.c >> >> @@ -157,6 +157,9 @@ struct ath10k_peer >> *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) >> >> { >> >> struct ath10k_peer *peer; >> >> >> >> + if (peer_id >= sizeof(peer->peer_ids) * BITS_PER_BYTE) >> > >> > I'd use >= BITS_PER_TYPE(peer->peer_ids). >> >> Nice, I didn't know about that. Wen, please submit v2 using this. >> >> -- >> Kalle Valo > Yes, > I have send v2 yesterday: > [PATCH v2] ath10k: add peer id check in ath10k_peer_find_by_id Ok, I didn't notice that yet. But in general it's good practise to reply to review comments and let the reviewer (and others) know if you agree with the comment or not. For example, in this case you could have said to Nicolas: "Ok, I'll send v2".
diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 23606b6..33de9e1 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -157,6 +157,9 @@ struct ath10k_peer *ath10k_peer_find_by_id(struct ath10k *ar, int peer_id) { struct ath10k_peer *peer; + if (peer_id >= sizeof(peer->peer_ids) * BITS_PER_BYTE) + return NULL; + lockdep_assert_held(&ar->data_lock); list_for_each_entry(peer, &ar->peers, list)
For some SDIO chip, the peer id is 65535 for MPDU with error status, then test_bit will trigger buffer overflow for peer's memory, if kasan enabled, it will report error. Add check for overflow the size of peer's peer_ids will avoid the buffer overflow access. Call trace of kasan: dump_backtrace+0x0/0x2ec show_stack+0x20/0x2c __dump_stack+0x20/0x28 dump_stack+0xc8/0xec print_address_description+0x74/0x240 kasan_report+0x250/0x26c __asan_report_load8_noabort+0x20/0x2c ath10k_peer_find_by_id+0x180/0x1e4 [ath10k_core] ath10k_htt_t2h_msg_handler+0x100c/0x2fd4 [ath10k_core] ath10k_htt_htc_t2h_msg_handler+0x20/0x34 [ath10k_core] ath10k_sdio_irq_handler+0xcc8/0x1678 [ath10k_sdio] process_sdio_pending_irqs+0xec/0x370 sdio_run_irqs+0x68/0xe4 sdio_irq_work+0x1c/0x28 process_one_work+0x3d8/0x8b0 worker_thread+0x508/0x7cc kthread+0x24c/0x264 ret_from_fork+0x10/0x18 Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00007-QCARMSWP-1. Signed-off-by: Wen Gong <wgong@codeaurora.org> --- drivers/net/wireless/ath/ath10k/txrx.c | 3 +++ 1 file changed, 3 insertions(+)