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Gabriel Krisman Bertazi authored
for_each_plane_on_pipe() indexes bad memory when iterating over an invalid pipe. Make sure the pipe exists before trying to use it. This prevents the crash below: root@ideacentre:~# igt-gpu-tools/tests/kms_ccs --r pipe-D-crc-sprite-planes-basic IGT-Version: 1.19-g59f0e3d182a8 (x86_64) (Linux: 4.13.0-rc6.intel-boxes+x86_64) Received signal SIGSEGV. Stack trace: #0 [fatal_sig_handler+0x185] #1 [killpg+0x40] #2 [__real_main485+0x2de] #3 [main+0x3f] #4 [__libc_start_main+0xf1] #5 [_start+0x2a] #6 [<unknown>+0x2a] Subtest pipe-D-crc-sprite-planes-basic: CRASH (0.004s) Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com> Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
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