* tip-bot for Andrey Ryabinin <tipbot@xxxxxxxxx> wrote: > Commit-ID: 74b61d1fb59bed3a6608161b05f2c0f5cb71acf6 > Gitweb: https://git.kernel.org/tip/74b61d1fb59bed3a6608161b05f2c0f5cb71acf6 > Author: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> > AuthorDate: Wed, 10 Jan 2018 18:36:02 +0300 > Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > CommitDate: Sun, 14 Jan 2018 12:59:51 +0100 > > x86/kasan: Panic if there is not enough memory to boot > > Currently KASAN doesn't panic in case it don't have enough memory > to boot. Instead, it crashes in some random place: > > kernel BUG at arch/x86/mm/physaddr.c:27! > > RIP: 0010:__phys_addr+0x268/0x276 > Call Trace: > kasan_populate_shadow+0x3f2/0x497 > kasan_init+0x12e/0x2b2 > setup_arch+0x2825/0x2a2c > start_kernel+0xc8/0x15f4 > x86_64_start_reservations+0x2a/0x2c > x86_64_start_kernel+0x72/0x75 > secondary_startup_64+0xa5/0xb0 > > Use memblock_virt_alloc_try_nid() for allocations without failure > fallback. It will panic with an out of memory message. > > Reported-by: kernel test robot <xiaolong.ye@xxxxxxxxx> > Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Acked-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Cc: kasan-dev@xxxxxxxxxxxxxxxx > Cc: Alexander Potapenko <glider@xxxxxxxxxx> > Cc: lkp@xxxxxx > Link: https://lkml.kernel.org/r/20180110153602.18919-1-aryabinin@xxxxxxxxxxxxx I think this commit should be in tip:x86/pti for dependency reasons, to get backported automatically. I suspect we want the same KASAN robustness in -stable. If this patch is too high risk and should be in x86/mm, then it should still be x86/pti based, to allow later merging into x86/pti. The latest already-upstream commit of x86/pti is de791821c295, and this commit applies cleanly to that base. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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