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b=dnXjpYmUkjd+sbGilXiYyKMgQijrPvrQxNUMTxQ3sCteoQlQ9gwJrU+mjHtH7VFLF vI0fWmNdDFGFUTO2uSdbQAgCsgN0TYLHBv4GgxGsDt6Tdjnkf+8BcV5YTK9dKjJi42 xMqJTi+n5IaSYLNCgyWiOBX+FOWNPapwGiYEXWHNQmKNx56SORlAmAAxDM9WAG/8yj 77Z4zt/izUVens3e3PVA4u2ldSvZTEREiEa0FvNE5L4i+Ic8IuJgTuE6mQw4ANKMfT 0h4kVTKQiijNjfUmYt3wyWUFmZ2XZhi6UqafkbOuSAiKbM+MTIgMAhPnIMMXcfw3dd iRITs0SPZNKOQ== Date: Mon, 22 Apr 2024 12:18:46 +0300 From: Mike Rapoport To: Nam Cao Cc: kernel test robot , oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Andrew Morton , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , Andreas Dilger , Arnd Bergmann , Changbin Du , Christophe Leroy , Geert Uytterhoeven , Ingo Molnar , Krister Johansen , Luis Chamberlain , Nick Desaulniers , Stephen Rothwell , Tejun Heo , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: [linux-next:master] [init] b8de39bd1b: BUG:kernel_failed_in_early-boot_stage,last_printk:early_console_in_setup_code Message-ID: References: <202404221524.4954a009-oliver.sang@intel.com> <20240422082942.B750cniQ@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240422082942.B750cniQ@linutronix.de> X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 33AF040007 X-Stat-Signature: 7xk7mhrnnqbw75rpsz6gpi6i44b7zyp8 X-HE-Tag: 1713777605-404 X-HE-Meta: U2FsdGVkX1/osxhrnKbLsgTRHIOmN8tQfx4UrQWvwk0Bnx4lpHCdCKS9UXauUwGzT6tpmrV1edDVuOREyM3EHxiqKgbNxWxkJNzsh93TOrYPSmbII4Ii4BCWiZimq5ujTj/xKiLV17XSgix6bTRML8yCx1E9S83pTtFM1tWkwzuRkJObc7lkmlMEVQEHuVvuzpFdtHnLrMGQyLRAWQXNllh+RvHsdDy517Syf3ma+n0aovpL6aImnPDJfuH6CEmf/eMQoCNBtJIVaZBXWmlEpjZALcDnhAb8+vSdK4AOzN6wRRPUoahQiL03x2PjKzL9vkPVu3FcFNEtuWsNpxF3ow7NV+WR7tljgSrrvcswxd6Bac+5OD0eTrHC737HDlBPm6b0szRtE2hDBhx+wSBnEKbX8B9Ag0ANYMia+jKiVVtpqQ+CMSw9PxscoIKxeD7ZTyOrZp8/mVeCNlM8U4SeI3wvpGDPPkUQIrbVA+NJaZogcw0QN16CG/frKrlaatK4IL1cG44we0sqFMoYdBYyotHqIE2gFC4SqK/AkcI4uYPjjwThlTWqFRl4eZGpfLxAg4EnQHzQy9au6i+xEvR/EgdobtF0vlQWjH6km5uHqKMfK/+LhDU5rpeF9+PpNJiWxtkil9b+WwgXTrGgdYTcdSCw/G6gLjCD/ZDsTkpX77+hAKreTIgWcX2uoMqVi6HTUVJgCEWtsbCyV9qWpAfmN4pJRm9AWUVCuKmL+FzKh+ROXFsxtD51CvJtAHMIUBmqsHuwcKPSWCVzz6xdmD8scqbT+U91/fbJOq0PcjUYnu0EuTfi3Lk/lMuB/hyDf87DYDwt5DrTaGrRbh4mN6NZwdE1G+WFIBteREoCQs56GJ4rK9EnqpC01IxYXTMJIH1dbkDYmewXlG/QFMjOD5B9Ss1V7JfeG4/XWnoqHcYM/jNUQTmjz0Q3lyX8KlBV+PWZwiPMcvTvT7woAVPLrCI oZ4Fq7aE FUY+bwGt6GtdYKCb4L8toTsoePJ3pDv2dvf5Ht7/tSQHRQLfSZWsXst3CT2FbPvhKlEfHPim3xcTOmdqs6dPuV9wHBpif2RQvZTJtOeDmz/Hjpyuu4A4cho5bAgOuiqbFT5U1OeQ6APfZUUlAXmOE0nARSJsiUCCtj1ynGmZD/wQkx95d2jW1llWX53/H7tqQ7q8fWFhLuHqof1Hy2uMHAxST3CU3uSl++Shpdf8qZ5XRn+Vi+GoBuc2TfRymDrRETBeyIl7p4ucSTrUMNrC84d5vlWbZkMjTnp3KneDfDfdpGZtS4FtzSeM7sVS1St5nH6cRSPkcTcII3r7jRiUnZ86/jXv/Jtubt7eNz79eD7sGDbOLpWlUlWk/6pT1WeLJ6YBw X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Apr 22, 2024 at 10:29:42AM +0200, Nam Cao wrote: > On Mon, Apr 22, 2024 at 03:45:00PM +0800, kernel test robot wrote: > > kernel test robot noticed "BUG:kernel_failed_in_early-boot_stage,last_printk:early_console_in_setup_code" on: > > > > commit: b8de39bd1b76faffe7cd91e148a6d7d9bf4e38f7 ("init: fix allocated page overlapping with PTR_ERR") > > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > I can reproduce the problem. I rebased this commit onto v6.8.7, I can still > observe the problem. > > No immediate idea what is the problem. Backtrace from gdb goes crazy: > > (gdb) bt > #0 0xffffffffb2074ded in ?? () > #1 0x00000000000000a1 in ?? () > #2 0x00000000000000a1 in ?? () > #3 0x000000007ffff000 in ?? () > #4 0x00000000543ff000 in ?? () > #5 0x0000000000000000 in ?? () The kernel config here has CONFIG_DEBUG_VIRTUAL=y, so __pa translates to __phys_addr() in arch/x86/mm/physaddr.c and __pa(-PAGE_SIZE) triggers VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE); x86 has __pa_nodebug() that does not do bounds check, but it cannot be used in generic code because no other arch except s390 define it. For now I don't have ideas how to make this work in the general case, so probably we should only fix riscv for now. > @akpm: drop this commit until this is figured out? > > Best regards, > Nam > -- Sincerely yours, Mike.