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4b1bfb7d2d
Patch should fix this oops: BUG: unable to handle kernel NULL pointer dereference at 000000a0 IP: [<f8e06078>] rt2800usb_write_tx_desc+0x18/0xc0 [rt2800usb] *pdpt = 000000002408c001 *pde = 0000000024079067 *pte = 0000000000000000 Oops: 0000 [#1] SMP EIP: 0060:[<f8e06078>] EFLAGS: 00010282 CPU: 0 EIP is at rt2800usb_write_tx_desc+0x18/0xc0 [rt2800usb] EAX: 00000035 EBX: ef2bef10 ECX: 00000000 EDX: d40958a0 ESI: ef1865f8 EDI: ef1865f8 EBP: d4095878 ESP: d409585c DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Call Trace: [<f8da5e85>] rt2x00queue_write_tx_frame+0x155/0x300 [rt2x00lib] [<f8da424c>] rt2x00mac_tx+0x7c/0x370 [rt2x00lib] [<c04882b2>] ? mark_held_locks+0x62/0x90 [<c081f645>] ? _raw_spin_unlock_irqrestore+0x35/0x60 [<c04884ba>] ? trace_hardirqs_on_caller+0x5a/0x170 [<c04885db>] ? trace_hardirqs_on+0xb/0x10 [<f8d618ac>] __ieee80211_tx+0x5c/0x1e0 [mac80211] [<f8d631fc>] ieee80211_tx+0xbc/0xe0 [mac80211] [<f8d63163>] ? ieee80211_tx+0x23/0xe0 [mac80211] [<f8d632e1>] ieee80211_xmit+0xc1/0x200 [mac80211] [<f8d63220>] ? ieee80211_tx+0xe0/0xe0 [mac80211] [<c0487d45>] ? lock_release_holdtime+0x35/0x1b0 [<f8d63986>] ? ieee80211_subif_start_xmit+0x446/0x5f0 [mac80211] [<f8d637dd>] ieee80211_subif_start_xmit+0x29d/0x5f0 [mac80211] [<f8d63924>] ? ieee80211_subif_start_xmit+0x3e4/0x5f0 [mac80211] [<c0760188>] ? sock_setsockopt+0x6a8/0x6f0 [<c0760000>] ? sock_setsockopt+0x520/0x6f0 [<c076daef>] dev_hard_start_xmit+0x2ef/0x650 Oops might happen because we perform parallel putting new entries in a queue (rt2x00queue_write_tx_frame()) and removing entries after finishing transmitting (rt2800usb_work_txdone()). There are cases when _txdone may process an entry that was not fully send and nullify entry->skb . To fix check in _txdone if entry has flags that indicate pending transmission and wait until flags get cleared. Reported-by: Justin Piszcz <jpiszcz@lucidpixels.com> Cc: stable@kernel.org Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| rt2x00.h | ||
| rt2x00config.c | ||
| rt2x00crypto.c | ||
| rt2x00debug.c | ||
| rt2x00debug.h | ||
| rt2x00dev.c | ||
| rt2x00dump.h | ||
| rt2x00firmware.c | ||
| rt2x00leds.c | ||
| rt2x00leds.h | ||
| rt2x00lib.h | ||
| rt2x00link.c | ||
| rt2x00mac.c | ||
| rt2x00pci.c | ||
| rt2x00pci.h | ||
| rt2x00queue.c | ||
| rt2x00queue.h | ||
| rt2x00reg.h | ||
| rt2x00soc.c | ||
| rt2x00soc.h | ||
| rt2x00usb.c | ||
| rt2x00usb.h | ||
| rt61pci.c | ||
| rt61pci.h | ||
| rt73usb.c | ||
| rt73usb.h | ||
| rt2400pci.c | ||
| rt2400pci.h | ||
| rt2500pci.c | ||
| rt2500pci.h | ||
| rt2500usb.c | ||
| rt2500usb.h | ||
| rt2800.h | ||
| rt2800lib.c | ||
| rt2800lib.h | ||
| rt2800pci.c | ||
| rt2800pci.h | ||
| rt2800usb.c | ||
| rt2800usb.h | ||