[Nexus 7 Q&A, Help & Troubleshooting] scorpeeon:
After around 400 hours of up time (it actually never got restarted ever since i rooted it) my Nexus 7 (16GB, stock ROM, unlocked bootloader, rooted, CWM installed) just had a random reboot. Since it's such a rare occasion i thought i'll try to figure it out what caused it.

Situation was trying to play an 1080p flash video on youtube with various browsers (firefox, dolphin, opera) when it suddenly happened.

I'm thinking it might have something to do with some Flash player bug (which is not officially supported), with hardware acceleration something could have gone wrong. Of course it could be anything else.

The relevant looking rows from last_kmsg:

[259319.209048] vmap allocation for size 2097152 failed: use vmalloc=<size> to increase size.
[259319.209202] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[259319.209268] pgd = d8c44000
[259319.209382] [00000000] *pgd=00000000
[259319.209510] Internal error: Oops: 5 [#1] PREEMPT SMP
[259319.209576] Modules linked in:
[259319.209752] CPU: 0 Tainted: G W (3.1.10-g52027f9 #1)
[259319.209829] PC is at nvhost_job_add_gather+0x24/0x70
[259319.209957] LR is at nvhost_channelwrite+0x250/0x64c
[259319.210022] pc : [<c027f044>] lr : [<c0284b04>] psr: 60000053
[259319.210026] sp : d5831ee4 ip : 00000000 fp : 00000083
[259319.210200] r10: 00000078 r9 : cadeeae0 r8 : f08c8000
[259319.210317] r7 : f08c806c r6 : 00000000 r5 : 00000001 r4 : 00000000
[259319.210382] r3 : 00003b5c r2 : 00000083 r1 : cadeeae0 r0 : f08c8000
[259319.210501] Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment user
[259319.210566] Control: 10c5387d Table: 98c4404a DAC: 00000015

[blablabla]

[259319.254586] [<c027f044>] (nvhost_job_add_gather+0x24/0x70) from [<d5830000>] (0xd5830000)
[259319.254656] Code: e5906024 e5907038 e1a0c10c e580503c (e5948000)
[259319.255729] ---[ end trace 83abd419b2e7d691 ]---
[259319.255855] Kernel panic - not syncing: Fatal exception
[259319.256005] [<c0014e00>] (unwind_backtrace+0x0/0x138) from [<c065190c>] (panic+0x78/0x1a4)
[259319.256213] [<c065190c>] (panic+0x78/0x1a4) from [<c00124dc>] (die+0x218/0x284)
[259319.256304] [<c00124dc>] (die+0x218/0x284) from [<c06514a8>] (__do_kernel_fault.part.3+0x54/0x74)
[259319.256456] [<c06514a8>] (__do_kernel_fault.part.3+0x54/0x74) from [<c0019174>] (do_page_fault+0x2c4/0x324)
[259319.256591] [<c0019174>] (do_page_fault+0x2c4/0x324) from [<c00085b0>] (do_DataAbort+0x34/0x9c)
[259319.256739] [<c00085b0>] (do_DataAbort+0x34/0x9c) from [<c000e458>] (__dabt_svc+0x38/0x60)
[259319.256812] Exception stack(0xd5831e98 to 0xd5831ee0)
[259319.256930] 1e80: f08c8000 cadeeae0
[259319.257047] 1ea0: 00000083 00003b5c 00000000 00000001 00000000 f08c806c f08c8000 cadeeae0
[259319.257114] 1ec0: 00000078 00000083 00000000 d5831ee4 c0284b04 c027f044 60000053 ffffffff
[259319.257242] [<c000e458>] (__dabt_svc+0x38/0x60) from [<c027f044>] (nvhost_job_add_gather+0x24/0x70)
[259319.257364] [<c027f044>] (nvhost_job_add_gather+0x24/0x70) from [<d5830000>] (0xd5830000)
[259319.257488] CPU0: stopping
[259319.257563] [<c0014e00>] (unwind_backtrace+0x0/0x138) from [<c0008548>] (do_IPI+0x1d4/0x208)
[259319.257685] [<c0008548>] (do_IPI+0x1d4/0x208) from [<c000e4b8>] (__irq_svc+0x38/0xd0)
[259319.257750] Exception stack(0xc091bf28 to 0xc091bf70)
[259319.257866] bf20: 00000252 00000000 00000000 000f4240 d3e57b57 0000eb94
[259319.257932] bf40: c091a000 e67f5810 00000000 412fc099 00000000 00000000 3b9ac9ff c091bf70
[259319.258047] bf60: c024bb8c c003f6d8 20000053 ffffffff
[259319.258167] [<c000e4b8>] (__irq_svc+0x38/0xd0) from [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64)
[259319.258246] [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64) from [<c04236d0>] (cpuidle_idle_call+0xd0/0x264)
[259319.258370] [<c04236d0>] (cpuidle_idle_call+0xd0/0x264) from [<c000f820>] (cpu_idle+0xb8/0x10c)
[259319.258500] [<c000f820>] (cpu_idle+0xb8/0x10c) from [<c08d57b0>] (start_kernel+0x2c4/0x318)
[259319.258616] CPU2: stopping
[259319.258689] [<c0014e00>] (unwind_backtrace+0x0/0x138) from [<c0008548>] (do_IPI+0x1d4/0x208)
[259319.258811] [<c0008548>] (do_IPI+0x1d4/0x208) from [<c000e4b8>] (__irq_svc+0x38/0xd0)
[259319.258927] Exception stack(0xef86ff50 to 0xef86ff98)
[259319.258992] ff40: 000002da 00000000 00000000 000f4240
[259319.259112] ff60: d3e36817 0000eb94 ef86e000 e67f5010 00000000 412fc099 00000002 00000000
[259319.259180] ff80: 3b9ac9ff ef86ff98 c024bb8c c003f6d8 20000013 ffffffff
[259319.259302] [<c000e4b8>] (__irq_svc+0x38/0xd0) from [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64)
[259319.259425] [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64) from [<c04236d0>] (cpuidle_idle_call+0xd0/0x264)
[259319.259549] [<c04236d0>] (cpuidle_idle_call+0xd0/0x264) from [<c000f820>] (cpu_idle+0xb8/0x10c)
[259319.259670] [<c000f820>] (cpu_idle+0xb8/0x10c) from [<8064d9b4>] (0x8064d9b4)
[259319.259738] CPU3: stopping
[259319.259811] [<c0014e00>] (unwind_backtrace+0x0/0x138) from [<c0008548>] (do_IPI+0x1d4/0x208)
[259319.259936] [<c0008548>] (do_IPI+0x1d4/0x208) from [<c000e4b8>] (__irq_svc+0x38/0xd0)
[259319.260054] Exception stack(0xef899f50 to 0xef899f98)
[259319.260119] 9f40: 000002da 00000000 00000000 000f4240
[259319.260238] 9f60: d3e36817 0000eb94 ef898000 e654fc10 00000000 412fc099 00000003 00000000
[259319.260356] 9f80: 3b9ac9ff ef899f98 c024bb8c c003f6d8 20000013 ffffffff
[259319.260425] [<c000e4b8>] (__irq_svc+0x38/0xd0) from [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64)
[259319.260548] [<c003f6d8>] (tegra_idle_enter_lp3+0x5c/0x64) from [<c04236d0>] (cpuidle_idle_call+0xd0/0x264)
[259319.260671] [<c04236d0>] (cpuidle_idle_call+0xd0/0x264) from [<c000f820>] (cpu_idle+0xb8/0x10c)
[259319.260792] [<c000f820>] (cpu_idle+0xb8/0x10c) from [<8064d9b4>] (0x8064d9b4)
[259319.260864] Rebooting in 10 seconds..
[259329.275060] Restarting Linux version 3.1.10-g52027f9 (android-build@vpbs1.mtv.corp.google.com) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP PREEMPT Thu Jun 28 16:19:26 PDT 2012
[259329.275069]

No errors detected

The full last_kmsg can be found here:last_kmsg

Thanks in advance for any help.