From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 E92411FC3 for ; Thu, 14 Nov 2024 00:52:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731545545; cv=none; b=UCbH0D33GslKBGrLxzXrSKx6zEOuxBNgERBC406wsHWMQxA7NIM4q7cQrXFz9I+1mGo5VSCzBBB2kVcQjskXuTm3jPyR0AqPzvdQhv+W6Zauxeo7PR8gNhlcuHw3HGis+LWiMI4Zh0ZdSX0wOlWtSU7B4AB8TLK+9ZlZBECO4N0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731545545; c=relaxed/simple; bh=Y+Mu4KXAGkaxgi3j9aRVbS/PL5d/aTk3ng5DuoiekRw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:cdae:0:b0:3a7:1e1b:5d31 with SMTP id e9e14a558f8ab-3a71e1b5edamr14405805ab.0.1731545542928; Wed, 13 Nov 2024 16:52:22 -0800 (PST) Date: Wed, 13 Nov 2024 16:52:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <673549c6.050a0220.1324f8.008c.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in posixtimer_send_sigqueue From: syzbot To: jstultz@google.com, linux-kernel@vger.kernel.org, sboyd@kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de 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+strace: https://syzkaller.appspot.com/x/log.txt?x=10f714e8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=75175323f2078363 dashboard link: https://syzkaller.appspot.com/bug?extid=852e935b899bde73626e 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=14f714e8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1657b0c0580000 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+852e935b899bde73626e@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5854 at kernel/signal.c:2008 posixtimer_send_sigqueue+0x9da/0xbc0 kernel/signal.c:2008 Modules linked in: CPU: 0 UID: 0 PID: 5854 Comm: syz-executor139 Not tainted 6.12.0-rc6-next-20241108-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:posixtimer_send_sigqueue+0x9da/0xbc0 kernel/signal.c:2008 Code: df 80 3c 08 00 74 08 48 89 df e8 c1 ad a5 00 4c 89 2b eb 51 e8 a7 32 3b 00 41 be 02 00 00 00 e9 e9 fd ff ff e8 97 32 3b 00 90 <0f> 0b 90 e9 f2 fa ff ff 4c 89 ef e8 86 33 5a 03 84 c0 0f 84 aa 01 RSP: 0018:ffffc90000007bc0 EFLAGS: 00010006 RAX: ffffffff81644979 RBX: 0000000000000000 RCX: ffff888027dd8000 RDX: 0000000000010000 RSI: 000000000000001e RDI: 0000000000000009 RBP: ffffc90000007cc0 R08: ffffffff816450cc R09: 1ffffffff2857112 R10: dffffc0000000000 R11: fffffbfff2857113 R12: ffff8880203f6264 R13: 1ffff1100407ec4c R14: ffff8880203f61e0 R15: ffff8880203f62a0 FS: 0000555573d1f480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f61ecbdf388 CR3: 0000000036944000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: alarm_handle_timer+0x2f/0x60 kernel/time/alarmtimer.c:537 alarmtimer_fired+0x173/0x410 kernel/time/alarmtimer.c:205 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853 Code: 2b 00 74 08 4c 89 f7 e8 7a 52 8f 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc90003bf6ea0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff9200077ede0 RCX: ffff888027dd8ad8 RDX: dffffc0000000000 RSI: ffffffff8c0aea60 RDI: ffffffff8c605b60 RBP: ffffc90003bf6fe8 R08: ffffffff942b88b7 R09: 1ffffffff2857116 R10: dffffc0000000000 R11: fffffbfff2857117 R12: 1ffff9200077eddc R13: dffffc0000000000 R14: ffffc90003bf6f00 R15: 0000000000000246 down_read_killable+0xca/0xd30 kernel/locking/rwsem.c:1547 mmap_read_lock_killable include/linux/mmap_lock.h:198 [inline] __get_user_pages_locked mm/gup.c:1726 [inline] get_dump_page+0xe2/0x2f0 mm/gup.c:2269 dump_user_range+0x14d/0x970 fs/coredump.c:943 elf_core_dump+0x3e9f/0x4790 fs/binfmt_elf.c:2127 do_coredump+0x214b/0x2e60 fs/coredump.c:758 get_signal+0x140b/0x1750 kernel/signal.c:2995 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] irqentry_exit_to_user_mode+0x7e/0x250 kernel/entry/common.c:231 exc_page_fault+0x590/0x8c0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f61ecb6431e Code: fd d7 c9 0f bc d1 c5 fe 7f 27 c5 fe 7f 6f 20 c5 fe 7f 77 40 c5 fe 7f 7f 60 49 83 c0 1f 49 29 d0 48 8d 7c 17 61 e9 d2 04 00 00 fe 6f 1e c5 fe 6f 56 20 c5 fd 74 cb c5 fd d7 d1 49 83 f8 21 0f RSP: 002b:00007ffd91b57128 EFLAGS: 00010287 RAX: 00007ffd91b57130 RBX: 00007ffd91b57130 RCX: 0000000000000000 RDX: 00000000000000e0 RSI: 0000000000000000 RDI: 00007ffd91b57130 RBP: 00007ffd91b57280 R08: 00000000000000e0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00000000000f4240 R14: 00000000000140b7 R15: 00007ffd91b57264 ---------------- Code disassembly (best guess): 0: 2b 00 sub (%rax),%eax 2: 74 08 je 0xc 4: 4c 89 f7 mov %r14,%rdi 7: e8 7a 52 8f 00 call 0x8f5286 c: f6 44 24 61 02 testb $0x2,0x61(%rsp) 11: 0f 85 85 01 00 00 jne 0x19c 17: 41 f7 c7 00 02 00 00 test $0x200,%r15d 1e: 74 01 je 0x21 20: fb sti 21: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp) 28: e0 45 * 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction 31: 00 00 33: 43 c7 44 25 09 00 00 movl $0x0,0x9(%r13,%r12,1) 3a: 00 00 3c: 43 rex.XB 3d: c7 .byte 0xc7 3e: 44 rex.R 3f: 25 .byte 0x25 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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