From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (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 ACFA269D31 for ; Sat, 16 Nov 2024 16:09:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731773373; cv=none; b=LZNHhAjaH+jdqjejQLU3M73QJBWrtpzABJOuVS0On9+rDRc5Nv1F3TxCP/WcREiq0Z/eB0HR5cTND7XEZnVPgAVo33ApzrvNuUfuVCEaSSO1qIHudtgCmrdhqKc53/DeCJb/BfaHjC2Jnh9Oqq7I0/4362tFrQapZWVPF8ixJTE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731773373; c=relaxed/simple; bh=tnBh3VlEBeT0ij8BsSW/LVAHLyPWZzYjLtDAP669CNU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ZqELXCFJ362R6BIdKYwqVJWBPTh3OjH72CAejJjHgUCF8SoPXCJN+xTNQClUzUGSGroqTKhridAzaSQyF4Kudp2MtiVC9xTDrS90CPbPNLM9z1qSmaUg/tZH8h6PJxdOz261ffkSFyk1ZgxdUVmIV61bfPpIVDcBx0OFdTwZLsk= 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=209.85.166.197 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-il1-f197.google.com with SMTP id e9e14a558f8ab-3a760b00c86so923185ab.3 for ; Sat, 16 Nov 2024 08:09:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731773371; x=1732378171; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=961AfgVSCpqKg4yIam3zRM6MVE/rjEtbGlNdMPl7RXI=; b=fCD4hn+UL/dItcrzHcNZHvDRpVkNbC+dielIRgG4wZAEVTUkBs0tDgSTWpin+pBpNO x/lueJaYKNkNP1MhS/WEfJmhAnp/xgVe0gC1BFsXGtXsFFn8s0UbWhH/+xlamev1YXgP 66grOXX7enFwfL3tB/zGcxcsQU3UBgMGLE7/yO0Kzc8H/3QrKounCfq15naB/Vkhl5Rs zW35HatOv9a96bMkeQJwhdSWBxq9oa84RiR/vCDp8BqzfKSwHb8Ce7Utl+31srr8ToNi JM3QyHZ01fPAjG+8LR9GCxUqnGktMoAIPRkbjH5RKTV3IiNLlZHLKsjDXpEnAuUSCORV dQlQ== X-Forwarded-Encrypted: i=1; AJvYcCV5yxBWGofzNl10rbf3sQA1y9KVBVyUe+xY+YUpL/bjT3C5pET39MsewRvVGoMWXvGJU0oWh25IHoFa2Ts=@vger.kernel.org X-Gm-Message-State: AOJu0YwlFNEiXfydtg2IXrIJqhdjmrd9ApQdsV2d02H80+e/vl1hPmgM UxFZPkJ3PoAvlmKwIYmJ6eBsTH1/8CvPTM1B8dNdY9N2dlfRWBJnkm+XNbI0gy+nXXQEBXBndbS xYRgCr0gZhhO9a70QzVofJft9j6Tgftv8beE4TSlTZS/S2tB6S/WKWmI= X-Google-Smtp-Source: AGHT+IHxS2CeXL5l/Tfn73uJ3MCRzTvda8qoW3IQ6NKbzCY/ZWPdUtnRDAeDRx2eI2OEuqS4wp94jhaCmsvtZA8gX3q7HsojNyyD Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:ca05:0:b0:3a6:c493:7395 with SMTP id e9e14a558f8ab-3a747ff8a50mr65767375ab.5.1731773370862; Sat, 16 Nov 2024 08:09:30 -0800 (PST) Date: Sat, 16 Nov 2024 08:09:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6738c3ba.050a0220.bb738.000d.GAE@google.com> Subject: [syzbot] [kernel?] WARNING: locking bug in get_random_u8 From: syzbot To: Jason@zx2c4.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 929beafbe7ac Add linux-next specific files for 20241108 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=14cb0ce8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=75175323f2078363 dashboard link: https://syzkaller.appspot.com/bug?extid=7f4f9a43a9c78eaee04f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9705ecb6a595/disk-929beafb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dbdd1f64b9b8/vmlinux-929beafb.xz kernel image: https://storage.googleapis.com/syzbot-assets/3f70d07a929b/bzImage-929beafb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7f4f9a43a9c78eaee04f@syzkaller.appspotmail.com ============================= [ BUG: Invalid wait context ] 6.12.0-rc6-next-20241108-syzkaller #0 Not tainted ----------------------------- syz.4.319/7686 is trying to lock: ffff8880b873a970 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b873a970 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0x1a0/0xaa0 drivers/char/random.c:551 other info that might help us debug this: context-{2:2} no locks held by syz.4.319/7686. stack backtrace: CPU: 1 UID: 0 PID: 7686 Comm: syz.4.319 Not tainted 6.12.0-rc6-next-20241108-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] get_random_u8+0x1bd/0xaa0 drivers/char/random.c:551 get_random_u32_below include/linux/random.h:78 [inline] kfence_guarded_alloc+0x9c/0xcd0 mm/kfence/core.c:421 __kfence_alloc+0x344/0x370 mm/kfence/core.c:1136 kfence_alloc include/linux/kfence.h:129 [inline] slab_alloc_node mm/slub.c:4137 [inline] __kmalloc_cache_noprof+0x2dd/0x390 mm/slub.c:4309 kmalloc_noprof include/linux/slab.h:901 [inline] add_stack_record_to_list mm/page_owner.c:172 [inline] inc_stack_record_count mm/page_owner.c:214 [inline] __set_page_owner+0x55f/0x800 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x3725/0x3870 mm/page_alloc.c:3510 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4786 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 stack_depot_save_flags+0x666/0x830 lib/stackdepot.c:627 kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544 task_work_add+0xd9/0x490 kernel/task_work.c:77 __run_posix_cpu_timers kernel/time/posix-cpu-timers.c:1223 [inline] run_posix_cpu_timers+0x6ac/0x810 kernel/time/posix-cpu-timers.c:1422 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x551/0xd50 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 ee 14 43 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 43 99 a6 f5 65 8b 05 64 f3 3c 74 85 c0 74 43 48 c7 04 24 0e 36 RSP: 0018:ffffc900032efc60 EFLAGS: 00000206 RAX: 92c7e75658265800 RBX: 1ffff9200065df90 RCX: ffffffff9a3bf903 RDX: dffffc0000000000 RSI: ffffffff8c0ad880 RDI: 0000000000000001 RBP: ffffc900032efcf0 R08: ffffffff901c8877 R09: 1ffffffff203910e R10: dffffc0000000000 R11: fffffbfff203910f R12: dffffc0000000000 R13: 1ffff9200065df8c R14: ffffc900032efc80 R15: 0000000000000246 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] unlock_timer kernel/time/posix-timers.c:128 [inline] do_timer_settime+0x37f/0x3e0 kernel/time/posix-timers.c:908 __do_sys_timer_settime kernel/time/posix-timers.c:928 [inline] __se_sys_timer_settime kernel/time/posix-timers.c:914 [inline] __x64_sys_timer_settime+0x19e/0x240 kernel/time/posix-timers.c:914 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa02eb7e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa02cff6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000df RAX: ffffffffffffffda RBX: 00007fa02ed35f80 RCX: 00007fa02eb7e719 RDX: 0000000020000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00007fa02ebf1616 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa02ed35f80 R15: 00007ffd59aaea38 ---------------- Code disassembly (best guess): 0: 9c pushf 1: 8f 44 24 20 pop 0x20(%rsp) 5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1) a: 74 08 je 0x14 c: 4c 89 f7 mov %r14,%rdi f: e8 ee 14 43 f6 call 0xf6431502 14: f6 44 24 21 02 testb $0x2,0x21(%rsp) 19: 75 52 jne 0x6d 1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 43 99 a6 f5 call 0xf5a69972 <-- trapping instruction 2f: 65 8b 05 64 f3 3c 74 mov %gs:0x743cf364(%rip),%eax # 0x743cf39a 36: 85 c0 test %eax,%eax 38: 74 43 je 0x7d 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup