On Tue, Mar 31, 2015 at 11:49 AM, Andrew Bresticker <abrestic@xxxxxxxxxxxx> wrote: > From: Naidu Tellapati <naidu.tellapati@xxxxxxxxxx> > > pdc_wdt_probe() called pdc_wdt_stop() before watchdog_set_drvdata(), > resulting in the following NULL pointer dereference: > > CPU 0 Unable to handle kernel paging request at virtual address 0000008c, epc == 8082a2b8, ra == 8082a914 > Oops[#1]: > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.0.0-rc5+ #102 > task: 8f8c0000 ti: 8f89e000 task.ti: 8f89e000 > $ 0 : 00000000 8082a914 00000000 dc8ba200 > $ 4 : 8faf9418 80ac0000 8f9cdc10 00008012 > $ 8 : 00000000 806e2350 00000001 8f001880 > $12 : 8f89fd14 00000000 00000000 65646f4d > $16 : 8faf9418 8f9cdc10 8f001880 8f9cdc00 > $20 : 00000000 80c20000 00000000 80bc0000 > $24 : 00000002 00000000 > $28 : 8f89e000 8f89fd00 00000000 8082a914 > Hi : 0000006b > Lo : 00008013 > epc : 8082a2b8 pdc_wdt_stop+0x1c/0x44 > Not tainted > ra : 8082a914 pdc_wdt_probe+0x404/0x550 > Status: 11000403 KERNEL EXL IE > Cause : 00800008 > BadVA : 0000008c > PrId : 0001a120 (MIPS interAptiv (multi)) > > Fix it by moving the call to pdc_wdt_stop() after we've set drvdata. Disregard this patch and patch 2 - it looks like James Hogan beat me to it :). Patches 3 and 4 still apply I think. -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
