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bh=HWMo6N7DknydD/H3u9J3QQxi5mYUqnkI0qT9deB89w8=; b=uTwfdT4gS3CIP1z3mkGpl4P8Gf92GQXuhhmIYlvD1xVncO7izDn+jAV4Apa0RGHBKEJKR4 vhowu68fJPYIp78+Vl8EvbWe95N/5nHlgLx62Z20l5+2NyF+v0SLrMY5MWzNiKsvI7NZyI 93GZKTT6hHfJWxZE7VeUDnSP6Dk6hCxJhLSzMWi3yqnL74T7qBAuZj8v6BLTeCKLEUIrAw YUvxUS+9IkzVfPI+qFCWKMSLDi22FmmBoVzvvjdF68hCXdxT0xWDqx3RzOfvXENFQknH0S oHkK0dkui1r/6esISb5CKAKDKdfR52DLcAnvjsfkBTL6j+gmCX5Q9bZS1+ebCw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1753291364; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=HWMo6N7DknydD/H3u9J3QQxi5mYUqnkI0qT9deB89w8=; b=0zsDEKsnDDRc17JusZ6oZ+IxZboqKL/mREeqzblTxb3++XoS5iND//bsgxkB0oMKgADZDg YbYlqM7vHU9zaLBg== To: kernel test robot , Peter Zijlstra Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, x86@kernel.org, Sebastian Andrzej Siewior , linux-mm@kvack.org, ltp@lists.linux.it, oliver.sang@intel.com Subject: Re: [tip:locking/futex] [futex] 56180dd20c: BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c In-Reply-To: <202507231021.dcf24373-lkp@intel.com> References: <202507231021.dcf24373-lkp@intel.com> Date: Wed, 23 Jul 2025 19:22:43 +0200 Message-ID: <87a54usty4.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-HE-Meta: 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 UmSbRgeI hjVaQQVUM44O5IiY= X-Rspamd-Queue-Id: 5E34F100012 X-Stat-Signature: eg1dparkc7qsyt1irtkd7m8nebkwisdk X-Rspamd-Server: rspam11 X-Rspam-User: X-HE-Tag-Orig: 1753291366-839311 X-HE-Tag: 1753291369-894000 X-HE-Meta: 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 L/yJAOZP 746pMDZ3IxgjBVF76NDJVVg7GEzVtuM9T1bWj/F7odT/h1sGZyrDNrAeX0Ph/FvPGCLCZMtX9MNYOTvNExTOWbIs1SQq/m0e5j/3wOAwdsSqW3qZsByG/J9hOVe4cmGYeJ/sdmh6UADB4pX3m/PKNCokVFRWdUsz745KMMq7qv+OAbWbD/Bbp0i6PZT2qgjZexYnMR2lqDWZHM0EAH11ayzR5a1gNJQ4fTF3yzb+HkzfZFXTFxhv8JzYWhg== 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 Wed, Jul 23 2025 at 16:46, kernel test robot wrote: > kernel test robot noticed "BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c" on: > > commit: 56180dd20c19e5b0fa34822997a9ac66b517e7b3 ("futex: Use RCU-based per-CPU reference counting instead of rcuref_t") > https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git locking/futex > > the issue (1)(2) happen randomly upon 56180dd20c. Hmm. > a255b78d14324f8a 56180dd20c19e5b0fa34822997a > ---------------- --------------------------- > fail:runs %reproduction fail:runs > | | | > :50 48% 24:50 dmesg.BUG:scheduling_while_atomic <---- (2) > :50 48% 24:50 dmesg.BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c <---- (1) > 50:50 0% 50:50 dmesg.Mem-Info > 50:50 0% 50:50 dmesg.invoked_oom-killer:gfp_mask=0x > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202507231021.dcf24373-lkp@intel.com > > > [ 286.673775][ C97] BUG: sleeping function called from invalid context at kernel/nsproxy.c:233 <---- (1) > [ 286.673784][ C97] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6748, name: oom03 > [ 286.673787][ C97] preempt_count: 7ffffffe, expected: 0 Ooops. That's a corrupted preempt counter, which has underflown twice. Can you please enable CONFIG_DEBUG_PREEMPT, so we can see where this happens? Thanks, tglx