syzbot


KASAN: use-after-free Write in get_block
Status: fixed on 2020/09/16 22:51
Reported-by: syzbot+c7d9ec7a1a7272dd71b3@syzkaller.appspotmail.com
Fix commit: 270ef410 fs/minix: reject too-large maximum file size
First crash: 171d, last: 117d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config

Fix bisection: the fix commit could be any of (bisect log):

  5d5103595e9e x86/cpu: Reinitialize IA32_FEAT_CTL MSR on BSP during wakeup
  cc5277fe66cf x86/resctrl: Fix a NULL vs IS_ERR() static checker warning in rdt_cdp_peer_get()
  8e742aa79780 syscalls: Fix offset type of ksys_ftruncate()
  a13b9d0b9721 x86/cpu: Use pinning mask for CR4 bits needing to be 0
  2c18bd525c47 x86/resctrl: Fix memory bandwidth counter width for AMD
  bb5570ad3b54 x86/asm/64: Align start of __clear_user() loop to 16-bytes
  098c7938217d Merge tag 'x86_urgent_for_5.8_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.14 KASAN: use-after-free Write in get_block C fix 5 143d 191d 0/1 upstream: reported C repro on 2020/04/12 23:36
linux-4.19 KASAN: use-after-free Write in get_block 3 169d 188d 0/1 auto-closed as invalid on 2020/09/02 00:35

Sample crash report:

Crashes (12):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-selinux-root 2020/05/16 07:15 upstream 12bf0b63 37bccd4e .config log report syz C aeb@cwi.nl, danarag@gmail.com, deepa.kernel@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2020/05/15 23:36 upstream 1ae7efb3 d7f9fffa .config log report syz C deepa.kernel@gmail.com, dvlasenk@redhat.com, linux-kernel@vger.kernel.org, pombredanne@nexb.com, tglx@linutronix.de, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-smack-root 2020/05/15 22:44 upstream 1ae7efb3 d7f9fffa .config log report syz C aeb@cwi.nl, akpm@linux-foundation.org, deepa.kernel@gmail.com, linux-kernel@vger.kernel.org, pombredanne@nexb.com, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-root 2020/05/15 04:34 upstream 8c1684bb 2d572622 .config log report syz C deepa.kernel@gmail.com, jack@suse.cz, linux-kernel@vger.kernel.org, pombredanne@nexb.com, tglx@linutronix.de, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-smack-root 2020/05/15 01:12 upstream 8c1684bb 2d572622 .config log report syz C akpm@linux-foundation.org, danarag@gmail.com, dvlasenk@redhat.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/05/15 05:01 linux-next ac935d22 2d572622 .config log report syz C aeb@cwi.nl, deepa.kernel@gmail.com, jack@suse.cz, linux-kernel@vger.kernel.org, pombredanne@nexb.com, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/05/14 16:13 linux-next ac935d22 2d572622 .config log report syz C aeb@cwi.nl, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, pombredanne@nexb.com, tglx@linutronix.de, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2020/05/16 18:08 upstream 12bf0b63 37bccd4e .config log report syz akpm@linux-foundation.org, gregkh@linuxfoundation.org, jack@suse.cz, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/05/03 11:20 linux-next ac935d22 5457883a .config log report syz akpm@linux-foundation.org, danarag@gmail.com, deepa.kernel@gmail.com, jack@suse.cz, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2020/06/26 10:39 upstream 4a21185c aea82c00 .config log report aeb@cwi.nl, akpm@linux-foundation.org, danarag@gmail.com, dvlasenk@redhat.com, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/05/05 01:23 linux-next ac935d22 9941337c .config log report akpm@linux-foundation.org, danarag@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/05/03 10:35 linux-next ac935d22 5457883a .config log report akpm@linux-foundation.org, danarag@gmail.com, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, viro@zeniv.linux.org.uk