<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)" href="https://bugs.freedesktop.org/show_bug.cgi?id=54226#c91">Comment # 91</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [snb 3.5] stale semaphore sync seqno (typically as seen on bcs->rcs)" href="https://bugs.freedesktop.org/show_bug.cgi?id=54226">bug 54226</a> from <a class="email" href="mailto:longerdev@gmail.com" title="LongerDev <longerdev@gmail.com>"> LongerDev</a> <pre>I tried it patch on linux-3.11_rc1, but when X starting I see: 791966 Jul 21 16:17:07 localhost kernel: [ 19.320879] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 791967 Jul 21 16:17:07 localhost kernel: [ 19.320948] IP: [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178 791968 Jul 21 16:17:07 localhost kernel: [ 19.320995] PGD b0d80067 PUD b0c18067 PMD 0 791969 Jul 21 16:17:07 localhost kernel: [ 19.321031] Oops: 0000 [#1] PREEMPT SMP 791970 Jul 21 16:17:07 localhost kernel: [ 19.321064] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec brcmsmac snd_hwdep snd_p cm cordic brcmutil bcma snd_page_alloc snd_timer snd soundcore 791971 Jul 21 16:17:07 localhost kernel: [ 19.321209] CPU: 0 PID: 2696 Comm: X Not tainted 3.11.0-rc1 #1 791972 Jul 21 16:17:07 localhost kernel: [ 19.321249] Hardware name: SAMSUNG ELECTRONICS CO., LTD. SF311/SF411/SF511/SF311/SF411/SF511, BIOS 06HW.M011.20110503.SCY 05 /03/2011 791973 Jul 21 16:17:07 localhost kernel: [ 19.321322] task: ffff8800b1c07590 ti: ffff8800b0c24000 task.ti: ffff8800b0c24000 791974 Jul 21 16:17:07 localhost kernel: [ 19.321370] RIP: 0010:[<ffffffff8136bfc0>] [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178 791975 Jul 21 16:17:07 localhost kernel: [ 19.321426] RSP: 0018:ffff8800b0c25bc8 EFLAGS: 00010286 791976 Jul 21 16:17:07 localhost kernel: [ 19.321461] RAX: 0000000000000000 RBX: ffff8800b1c3d4d8 RCX: 0000000000027330 791977 Jul 21 16:17:07 localhost kernel: [ 19.321506] RDX: 0000000000000080 RSI: ffffc900045c003c RDI: ffffc900045c0038 791978 Jul 21 16:17:07 localhost kernel: [ 19.321550] RBP: ffff8800b0c25c08 R08: ffff8800b0d97f00 R09: 00000000000145c0 791979 Jul 21 16:17:07 localhost kernel: [ 19.321594] R10: 0000000000001000 R11: ffff8800b1c3c000 R12: 0000000000000000 791980 Jul 21 16:17:07 localhost kernel: [ 19.321638] R13: 0000000000002044 R14: 0000000000000000 R15: ffff8800b1c3c000 791981 Jul 21 16:17:07 localhost kernel: [ 19.321682] FS: 00007ff167ae8880(0000) GS:ffff880100200000(0000) knlGS:0000000000000000 791982 Jul 21 16:17:07 localhost kernel: [ 19.321732] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 791983 Jul 21 16:17:07 localhost kernel: [ 19.321767] CR2: 0000000000000010 CR3: 00000000b1cc9000 CR4: 00000000000407f0 791984 Jul 21 16:17:07 localhost kernel: [ 19.321810] Stack: 791985 Jul 21 16:17:07 localhost kernel: [ 19.321824] ffff8800b1c3d4d8 0000000000000000 ffff8800aff24000 0000000000000000 791986 Jul 21 16:17:07 localhost kernel: [ 19.321876] ffff8800b1c3c000 ffff8800b0d97f00 ffff8800b1f66a00 ffff8800b1c3d4d8 791987 Jul 21 16:17:07 localhost kernel: [ 19.321927] ffff8800b0c25c68 ffffffff81334b11 ffff880000000028 0000000000000000 791988 Jul 21 16:17:07 localhost kernel: [ 19.321979] Call Trace: 791989 Jul 21 16:17:07 localhost kernel: [ 19.322000] [<ffffffff81334b11>] __i915_add_request+0x6d/0x215 791990 Jul 21 16:17:07 localhost kernel: [ 19.322045] [<ffffffff8133b8d9>] i915_gem_do_execbuffer.isra.14+0xd07/0xdc5 791991 Jul 21 16:17:07 localhost kernel: [ 19.322089] [<ffffffff8133bd5e>] ? i915_gem_execbuffer2+0x5d/0x1e3 791992 Jul 21 16:17:07 localhost kernel: [ 19.322128] [<ffffffff8133be5a>] i915_gem_execbuffer2+0x159/0x1e3 791993 Jul 21 16:17:07 localhost kernel: [ 19.322170] [<ffffffff8130e167>] drm_ioctl+0x302/0x446 791994 Jul 21 16:17:07 localhost kernel: [ 19.322204] [<ffffffff8133bd01>] ? i915_gem_execbuffer+0x36a/0x36a 791995 Jul 21 16:17:07 localhost kernel: [ 19.322245] [<ffffffff8102a823>] ? __do_page_fault+0x34f/0x3f3 791996 Jul 21 16:17:07 localhost kernel: [ 19.322285] [<ffffffff810d3621>] vfs_ioctl+0x21/0x34 791997 Jul 21 16:17:07 localhost kernel: [ 19.322317] [<ffffffff810d3e7a>] do_vfs_ioctl+0x3b8/0x3fb 791998 Jul 21 16:17:07 localhost kernel: [ 19.322353] [<ffffffff810dbab9>] ? fget_light+0xa1/0xb8 791999 Jul 21 16:17:07 localhost kernel: [ 19.322387] [<ffffffff810d3efd>] SyS_ioctl+0x40/0x6b 792000 Jul 21 16:17:07 localhost kernel: [ 19.322420] [<ffffffff816450d2>] system_call_fastpath+0x16/0x1b 792001 Jul 21 16:17:07 localhost kernel: [ 19.322457] Code: e8 d4 c0 f0 ff 8b 73 2c 44 89 ef 83 c6 04 89 73 2c 48 03 73 10 e8 bf c0 f0 ff 8b 73 2c 48 8b 45 c8 83 c6 0 4 89 73 2c 48 03 73 10 <8b> 78 10 83 ef 80 e8 a3 c0 f0 ff 83 43 2c 04 49 ff c4 49 83 fc 792002 Jul 21 16:17:07 localhost kernel: [ 19.322688] RIP [<ffffffff8136bfc0>] gen6_add_request+0xe7/0x178 792003 Jul 21 16:17:07 localhost kernel: [ 19.322728] RSP <ffff8800b0c25bc8> 792004 Jul 21 16:17:07 localhost kernel: [ 19.322750] CR2: 0000000000000010 792005 Jul 21 16:17:07 localhost kernel: [ 19.330669] ---[ end trace b13215eb98a2df5f ]---</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>