From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2CFAE4964E for ; Mon, 23 Dec 2024 05:47:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734932853; cv=none; b=j9/f8c1F8nmct9mYzUK9A99YGJhcH3BGPfgexm1urN3tSeeyTxGifXt4VRb5zVMNQjyCrb/Mb54i0ZQpIHGWrmP7IO5tGtqP8CgkjD9Iq8KEYa6nNu2TTG2DKLIyZ0sqg125tdpOkE12/WBgqVok8OrrGWoMFDrPTAzNup4f3VY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734932853; c=relaxed/simple; bh=U5jFqg6b4AA+ZKWj/5z5QLZBZZRyix1WACTl/7sPEOA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qgGOoQ2NvIJ6wz15Ic9i2o998BmAAReQU/qBxm/y51tCHAoq/ecNCz3PNFFubdDWAf3kjBM2pZ/jh0oH7E1UY5lgxOJR5bj6WTfmYGNtP/nD9U19jBscQ7tPNwvD8Qc1Om16i/GxvzmDzPzXhTNo5mzF8qV8xMmd4P0vqcTw1YI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f78.google.com with SMTP id ca18e2360f4ac-844e6476ab1so610074339f.3 for ; Sun, 22 Dec 2024 21:47:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734932851; x=1735537651; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=mHwCmrgL1DYHrgrnimGVzxpQWgzTEEf1MZMR7yKL6ZA=; b=DbbBQLvIA/65T6tschJWSwAB5FFTQemomm6fwXSWu/txFNeihMAkhD3U+3zgcMGVCR 1g+W4S/T0i+l8IvBoR0+6rlZhjruGVQQSOHbCSTXuA1SUrSfLWVOnFHkc9vriuyqCrB3 staofZ13rE06fVIa0AA1aLn8tB4K8lBRMMhIucoigzwtJBQzyXgjp2V6ZrQUt6ihPd5Q eW06wqzxys7wtMVTdetPwPxm87eRXROo/Y+ol0s+LyBBOvlshvvlN2J4FD1j+TAWGqX7 gUoRJVdCw5OPn2znX3nCuv262Qk414FmqnWC42GVADJ4yFUUmYeYpp+pjkEd0FFnHwuM ZGVA== X-Gm-Message-State: AOJu0YyOU250aUBLqlM4wICiWzUTp66722FOD9Bd/ogcjADMUBc76nmR jjdJ/aT+JMZxvw8/p4cANuGNT6YSINamg0ODrn2ruBZDdJcRwsNKi3kqu3/kn8+xckQV3oQ/Pn1 cAKze1zchqywe9J0vVxlgW6fxFkuIZs3/r9El+61KqDyZI8Lqw2Yudw83Rg== X-Google-Smtp-Source: AGHT+IEWQly5qaj7/uU+sxQqTAF4FvzPd+tJXlUX0EdhAluOz1aEPh0O2xKX2gQfKZruzIkUJornwQ6028L1Ng8AbNMvsLgy+NAM Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:16cd:b0:3a7:66e0:a98a with SMTP id e9e14a558f8ab-3c2d2781333mr89665765ab.9.1734932851271; Sun, 22 Dec 2024 21:47:31 -0800 (PST) Date: Sun, 22 Dec 2024 21:47:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6768f973.050a0220.226966.0038.GAE@google.com> Subject: [syzbot] [kernel?] INFO: rcu detected stall in irqentry_exit From: syzbot To: linux-kernel@vger.kernel.org, luto@kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c061cf420ded Merge tag 'trace-v6.13-rc3' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14ffb7e8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6a2b862bf4a5409f dashboard link: https://syzkaller.appspot.com/bug?extid=e7333f30a06603479916 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124a4cf8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d015858e49d6/disk-c061cf42.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8af783cbffc2/vmlinux-c061cf42.xz kernel image: https://storage.googleapis.com/syzbot-assets/33b1bb739ed8/bzImage-c061cf42.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7333f30a06603479916@syzkaller.appspotmail.com rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=11857, q=865 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294988328-4294977825), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10504 jiffies! g11857 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:25880 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.13.0-rc3-syzkaller-00062-gc061cf420ded #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:preempt_count_add+0x4/0x190 kernel/sched/core.c:5838 Code: 7c 97 48 8b 3c 24 e8 db 52 98 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 89 fb 48 c7 c0 c0 a9 3a 9a 48 c1 e8 03 49 bf 00 00 RSP: 0018:ffffc90000007428 EFLAGS: 00000202 RAX: 0000000000000002 RBX: 1ffff92000000ea0 RCX: ffffc90000007ff0 RDX: dffffc0000000000 RSI: ffffffff8161d279 RDI: 0000000000000001 RBP: ffffc90000007538 R08: 000000000000000b R09: ffffc900000075f0 R10: dffffc0000000000 R11: ffffffff818b39e0 R12: dffffc0000000000 R13: ffffc90000007500 R14: ffffffff8161d279 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3085ffff CR3: 0000000033f16000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0xb0/0x22d0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4119 [inline] slab_alloc_node mm/slub.c:4168 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4175 skb_clone+0x20c/0x390 net/core/skbuff.c:2084 can_send+0x69b/0xe20 net/can/af_can.c:261 bcm_can_tx+0x5dd/0x9a0 net/can/bcm.c:314 bcm_tx_timeout_handler+0x182/0x520 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1820 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:7078 Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8b 00 00 00 bf 01 00 00 00 e8 25 f4 a3 f5 e8 40 a0 dd f5 fb bf 01 00 00 00 85 ab ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 e5 47 3c f6 48 RSP: 0018:ffffc90000157c20 EFLAGS: 00000282 RAX: e3874fe73d50d000 RBX: 1ffff9200002af8c RCX: ffffffff9a3aa903 RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: 0000000000000001 RBP: ffffc90000157ce0 R08: ffffffff90197ab7 R09: 1ffffffff2032f56 R10: dffffc0000000000 R11: fffffbfff2032f57 R12: 1ffff9200002af84 R13: 1ffff9200002af88 R14: ffffc90000157c40 R15: dffffc0000000000 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:run_ksoftirqd+0xd7/0x130 kernel/softirq.c:952 Code: 8c e8 3d 90 66 0a 65 66 8b 05 5d dd a1 7e 66 85 c0 74 2a bf 01 00 00 00 e8 c6 ce ff ff e8 01 34 45 00 fb 48 c7 c7 80 91 09 8c b8 03 00 00 31 d2 e8 bd 38 0d 00 2e 2e 2e 31 c0 eb 06 e8 e1 33 RSP: 0018:ffffc90000157da0 EFLAGS: 00000286 RAX: e3874fe73d50d000 RBX: 1ffff9200002afb8 RCX: ffffffff9a3aa903 RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: ffffffff8c099180 RBP: ffffc90000157e38 R08: ffffffff90197ab7 R09: 1ffffffff2032f56 R10: dffffc0000000000 R11: fffffbfff2032f57 R12: 1ffff9200002afb4 R13: ffff88801ce87168 R14: dffffc0000000000 R15: ffffc90000157dc0 smpboot_thread_fn+0x546/0xa30 kernel/smpboot.c:164 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- This report is generated by a bot. 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