[Nouveau] [Bug 106994] [PATCH] Fix null pointer dereference in drmmode_output_dpms

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106994

--- Comment #1 from John Lindgren <john at jlindgren.net> ---
Full backtrace:

Thread 1 "Xorg" received signal SIGSEGV, Segmentation fault.
drmmode_output_dpms (output=0x558b2dab8ee0, mode=3) at
../../src/drmmode_display.c:921
921     ../../src/drmmode_display.c: No such file or directory.
#0  0x00007f386322a759 in drmmode_output_dpms (output=0x558b2dab8ee0, mode=3)
at ../../src/drmmode_display.c:921
        drmmode_output = 0x558b2dab8cc0
        koutput = 0x0
        props = <optimized out>
        drmmode = 0x558b2dab5200
        mode_id = -1
        i = 0
#1  0x0000558b2ba39223 in xf86DisableUnusedFunctions (pScrn=0x558b2dab4930) at
../../../../../../hw/xfree86/modes/xf86Crtc.c:3000
        output = <optimized out>
        xf86_config = 0x558b2dab56e0
        o = 6
        c = <optimized out>
#2  0x0000558b2ba40ef0 in xf86RandR12CrtcSet (pScreen=<optimized out>,
randr_crtc=0x558b2daf51f0, randr_mode=0x0, x=0, y=0, rotation=<optimized out>,
num_randr_outputs=0, randr_outputs=0x0)
    at ../../../../../../hw/xfree86/modes/xf86RandR12.c:1245
        pScrn = 0x558b2dab4930
        config = <optimized out>
        crtc = 0x558b2dab9ec0
        transform = 0x0
        changed = <optimized out>
        o = <optimized out>
        ro = <optimized out>
        save_crtcs = 0x558b2debcc50
        save_enabled = <optimized out>
#3  0x0000558b2ba84a32 in RRCrtcSet (crtc=<optimized out>, mode=0x0, x=0, y=0,
rotation=rotation at entry=1, numOutputs=numOutputs at entry=0, outputs=0x0) at
../../../../randr/rrcrtc.c:768
        pScreen = 0x558b2daacb80
        ret = <optimized out>
        crtcChanged = <optimized out>
        o = <optimized out>
#4  0x0000558b2ba862b3 in ProcRRSetCrtcConfig (client=0x558b2de43170) at
../../../../randr/rrcrtc.c:1366
        stuff = <optimized out>
        rep = {type = 0 '\000', status = 0 '\000', sequenceNumber = 0, length =
0, newTimestamp = 766260624, pad1 = 21899, pad2 = 735925696, pad3 = 21899, pad4
= 1660946009, pad5 = 32568}
        pScreen = <optimized out>
        crtc = 0x558b2daf51f0
        mode = 0x0
        numOutputs = 0
        outputs = <optimized out>
        time = <optimized out>
        rotation = 1
        ret = <optimized out>
        i = <optimized out>
        j = <optimized out>
        status = <optimized out>
#5  0x0000558b2b9c0e98 in Dispatch () at ../../../../dix/dispatch.c:479
        result = <optimized out>
        start_tick = 930
#6  0x0000558b2b9c4ee0 in dix_main (argc=3, argv=0x7ffdc0d05ac8,
envp=<optimized out>) at ../../../../dix/main.c:287
        i = <optimized out>
        alwaysCheckForInput = {0, 1}
#7  0x00007f3865d7db97 in __libc_start_main (main=0x558b2b9aeb50 <main>,
argc=3, argv=0x7ffdc0d05ac8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffdc0d05ab8) at ../csu/libc-start.c:310
        result = <optimized out>
        unwind_buf = 
              {cancel_jmp_buf = {{jmp_buf = {0, 837132253956422676,
94056220388192, 140727838333632, 0, 0, 6878053941391146004,
6843373089882258452}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0,
0x7f3868887733 <_dl_init+259>, 0x7f3868875438}, data = {prev = 0x0, cleanup =
0x0, canceltype = 1753773875}}}
        not_first_call = <optimized out>
#8  0x0000558b2b9aeb8a in _start ()

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