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https://github.com/armbian/build
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99 lines
4.4 KiB
Diff
99 lines
4.4 KiB
Diff
From 5518040dff6a3287b8d5ac6b1d2707c2a86aeddf Mon Sep 17 00:00:00 2001
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From: Wright Feng <wright.feng@cypress.com>
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Date: Mon, 22 Jun 2020 22:06:15 -0500
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Subject: [PATCH 050/179] brcmfmac: fix invalid address access when enabling
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SCAN log level
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The variable i is changed when setting random MAC address and causes
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invalid address access when printing the value of pi->reqs[i]->reqid.
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We replace reqs index with ri to fix the issue.
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[ 136.726473] Unable to handle kernel access to user memory outside uaccess routines at virtual address 0000000000000000
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[ 136.737365] Mem abort info:
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[ 136.740172] ESR = 0x96000004
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[ 136.743359] Exception class = DABT (current EL), IL = 32 bits
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[ 136.749294] SET = 0, FnV = 0
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[ 136.752481] EA = 0, S1PTW = 0
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[ 136.755635] Data abort info:
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[ 136.758514] ISV = 0, ISS = 0x00000004
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[ 136.762487] CM = 0, WnR = 0
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[ 136.765522] user pgtable: 4k pages, 48-bit VAs, pgdp = 000000005c4e2577
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[ 136.772265] [0000000000000000] pgd=0000000000000000
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[ 136.777160] Internal error: Oops: 96000004 [#1] PREEMPT SMP
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[ 136.782732] Modules linked in: brcmfmac(O) brcmutil(O) cfg80211(O) compat(O)
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[ 136.789788] Process wificond (pid: 3175, stack limit = 0x00000000053048fb)
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[ 136.796664] CPU: 3 PID: 3175 Comm: wificond Tainted: G O 4.19.42-00001-g531a5f5 #1
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[ 136.805532] Hardware name: Freescale i.MX8MQ EVK (DT)
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[ 136.810584] pstate: 60400005 (nZCv daif +PAN -UAO)
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[ 136.815429] pc : brcmf_pno_config_sched_scans+0x6cc/0xa80 [brcmfmac]
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[ 136.821811] lr : brcmf_pno_config_sched_scans+0x67c/0xa80 [brcmfmac]
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[ 136.828162] sp : ffff00000e9a3880
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[ 136.831475] x29: ffff00000e9a3890 x28: ffff800020543400
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[ 136.836786] x27: ffff8000b1008880 x26: ffff0000012bf6a0
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[ 136.842098] x25: ffff80002054345c x24: ffff800088d22400
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[ 136.847409] x23: ffff0000012bf638 x22: ffff0000012bf6d8
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[ 136.852721] x21: ffff8000aced8fc0 x20: ffff8000ac164400
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[ 136.858032] x19: ffff00000e9a3946 x18: 0000000000000000
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[ 136.863343] x17: 0000000000000000 x16: 0000000000000000
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[ 136.868655] x15: ffff0000093f3b37 x14: 0000000000000050
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[ 136.873966] x13: 0000000000003135 x12: 0000000000000000
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[ 136.879277] x11: 0000000000000000 x10: ffff000009a61888
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[ 136.884589] x9 : 000000000000000f x8 : 0000000000000008
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[ 136.889900] x7 : 303a32303d726464 x6 : ffff00000a1f957d
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[ 136.895211] x5 : 0000000000000000 x4 : ffff00000e9a3942
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[ 136.900523] x3 : 0000000000000000 x2 : ffff0000012cead8
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[ 136.905834] x1 : ffff0000012bf6d8 x0 : 0000000000000000
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[ 136.911146] Call trace:
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[ 136.913623] brcmf_pno_config_sched_scans+0x6cc/0xa80 [brcmfmac]
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[ 136.919658] brcmf_pno_start_sched_scan+0xa4/0x118 [brcmfmac]
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[ 136.925430] brcmf_cfg80211_sched_scan_start+0x80/0xe0 [brcmfmac]
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[ 136.931636] nl80211_start_sched_scan+0x140/0x308 [cfg80211]
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[ 136.937298] genl_rcv_msg+0x358/0x3f4
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[ 136.940960] netlink_rcv_skb+0xb4/0x118
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[ 136.944795] genl_rcv+0x34/0x48
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[ 136.947935] netlink_unicast+0x264/0x300
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[ 136.951856] netlink_sendmsg+0x2e4/0x33c
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[ 136.955781] __sys_sendto+0x120/0x19c
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Signed-off-by: Wright Feng <wright.feng@cypress.com>
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Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
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---
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.../net/wireless/broadcom/brcm80211/brcmfmac/pno.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
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index fabfbb0b40b0..d0a7465be586 100644
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
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@@ -158,12 +158,12 @@ static int brcmf_pno_set_random(struct brcmf_if *ifp, struct brcmf_pno_info *pi)
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struct brcmf_pno_macaddr_le pfn_mac;
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u8 *mac_addr = NULL;
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u8 *mac_mask = NULL;
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- int err, i;
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+ int err, i, ri;
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- for (i = 0; i < pi->n_reqs; i++)
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- if (pi->reqs[i]->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
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- mac_addr = pi->reqs[i]->mac_addr;
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- mac_mask = pi->reqs[i]->mac_addr_mask;
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+ for (ri = 0; ri < pi->n_reqs; ri++)
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+ if (pi->reqs[ri]->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
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+ mac_addr = pi->reqs[ri]->mac_addr;
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+ mac_mask = pi->reqs[ri]->mac_addr_mask;
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break;
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}
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@@ -185,7 +185,7 @@ static int brcmf_pno_set_random(struct brcmf_if *ifp, struct brcmf_pno_info *pi)
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pfn_mac.mac[0] |= 0x02;
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brcmf_dbg(SCAN, "enabling random mac: reqid=%llu mac=%pM\n",
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- pi->reqs[i]->reqid, pfn_mac.mac);
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+ pi->reqs[ri]->reqid, pfn_mac.mac);
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err = brcmf_fil_iovar_data_set(ifp, "pfn_macaddr", &pfn_mac,
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sizeof(pfn_mac));
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if (err)
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--
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2.17.1
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