lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <CACT4Y+Z1m2F368m1YLXQQP2TgM_1YSLYjU5z8LFGTjgnyXi8_g@mail.gmail.com> Date: Mon, 24 Apr 2023 09:43:03 +0200 From: Dmitry Vyukov <dvyukov@...gle.com> To: syzbot <syzbot+742c192afb1b2a0cbe86@...kaller.appspotmail.com> Cc: davem@...emloft.net, edumazet@...gle.com, krzysztof.kozlowski@...aro.org, kuba@...nel.org, linux-kernel@...r.kernel.org, linux-nfc@...ts.01.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [nfc?] KCSAN: data-race in __list_del_entry_valid / nfc_llcp_register_device On Mon, 24 Apr 2023 at 09:20, syzbot <syzbot+742c192afb1b2a0cbe86@...kaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 44149752e998 Merge tag 'cgroup-for-6.3-rc6-fixes' of git:/.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1682221fc80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=710057cbb8def08c > dashboard link: https://syzkaller.appspot.com/bug?extid=742c192afb1b2a0cbe86 > compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/7bfa303f05cc/disk-44149752.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/4e8ea8730409/vmlinux-44149752.xz > kernel image: https://storage.googleapis.com/syzbot-assets/e584bce13ba7/bzImage-44149752.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+742c192afb1b2a0cbe86@...kaller.appspotmail.com Concurrent list modifications can lead to arbitrary memory corruptions. > ================================================================== > BUG: KCSAN: data-race in __list_del_entry_valid / nfc_llcp_register_device > > read to 0xffff88810318c808 of 8 bytes by task 28453 on cpu 1: > __list_del_entry_valid+0x15/0xe0 lib/list_debug.c:46 > __list_del_entry include/linux/list.h:134 [inline] > list_del include/linux/list.h:148 [inline] > local_release net/nfc/llcp_core.c:172 [inline] > kref_put include/linux/kref.h:65 [inline] > nfc_llcp_local_put net/nfc/llcp_core.c:182 [inline] > nfc_llcp_unregister_device+0x7e/0x130 net/nfc/llcp_core.c:1620 > nfc_unregister_device+0xe6/0x130 net/nfc/core.c:1179 > nci_unregister_device+0x14c/0x160 net/nfc/nci/core.c:1303 > virtual_ncidev_close+0x30/0x50 drivers/nfc/virtual_ncidev.c:163 > __fput+0x245/0x570 fs/file_table.c:321 > ____fput+0x15/0x20 fs/file_table.c:349 > task_work_run+0x123/0x160 kernel/task_work.c:179 > resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] > exit_to_user_mode_loop+0xd1/0xe0 kernel/entry/common.c:171 > exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 > __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] > syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 > do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > write to 0xffff88810318c808 of 8 bytes by task 28459 on cpu 0: > __list_add include/linux/list.h:72 [inline] > list_add include/linux/list.h:88 [inline] > nfc_llcp_register_device+0x3e4/0x440 net/nfc/llcp_core.c:1604 > nfc_register_device+0x67/0x190 net/nfc/core.c:1124 > nci_register_device+0x4e6/0x570 net/nfc/nci/core.c:1257 > virtual_ncidev_open+0xdc/0x140 drivers/nfc/virtual_ncidev.c:148 > misc_open+0x1fd/0x230 drivers/char/misc.c:165 > chrdev_open+0x349/0x3c0 fs/char_dev.c:414 > do_dentry_open+0x5b3/0x930 fs/open.c:920 > vfs_open+0x47/0x50 fs/open.c:1051 > do_open fs/namei.c:3560 [inline] > path_openat+0x17e6/0x1d00 fs/namei.c:3715 > do_filp_open+0xf6/0x200 fs/namei.c:3742 > do_sys_openat2+0xb5/0x2a0 fs/open.c:1348 > do_sys_open fs/open.c:1364 [inline] > __do_sys_openat fs/open.c:1380 [inline] > __se_sys_openat fs/open.c:1375 [inline] > __x64_sys_openat+0xf3/0x120 fs/open.c:1375 > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > > value changed: 0xffffffff85eac670 -> 0xdead000000000122 > > Reported by Kernel Concurrency Sanitizer on: > CPU: 0 PID: 28459 Comm: syz-executor.0 Not tainted 6.3.0-rc6-syzkaller-00138-g44149752e998 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 > ================================================================== > > > --- > 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@...glegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@...glegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000006efbbe05fa0fd886%40google.com.
Powered by blists - more mailing lists