syzbot


general protection fault in syscall_return_slowpath
Status: upstream: reported syz repro on 2020/03/08 07:45
Reported-by: syzbot+cd66e43794b178bb5cd6@syzkaller.appspotmail.com
First crash: 122d, last: 32d

Cause bisection: the bug happens on the oldest tested release
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config
duplicates (4):
Title Repro Bisected Count Last Reported Patched Status
KASAN: null-ptr-deref Read in kvm_arch_check_processor_compat syz cause 1 15d 11d 0/17 closed as dup on 2020/06/30 06:11
BUG: unable to handle kernel NULL pointer dereference in __syscall_return_slowpath syz 7 1d06h 5d05h 0/17 closed as dup on 2020/06/29 16:42
general protection fault in pvclock_gtod_notify C 25 20h40m 8d01h 0/17 closed as dup on 2020/06/30 06:12
KASAN: out-of-bounds Read in kvm_arch_hardware_setup C 1 11d 7d01h 0/17 closed as dup on 2020/06/30 06:12
Patch testing requests:
Created Duration User Patch Repo Result
2020/07/03 11:23 0m jannh@google.com patch https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd44972d1ed2bfb6e0fb631dfcf547fd1e7 error
2020/03/08 18:35 3m jannh@google.com patch https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd44972d1ed2bfb6e0fb631dfcf547fd1e7 error
2020/03/08 17:21 3m jannh@google.com patch https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd44972d1ed2bfb6e0fb631dfcf547fd1e7 error
2020/07/04 06:40 dvyukov@google.com patch https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd44972d1ed2bfb6e0fb631dfcf547fd1e7 pending

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-smack-root 2020/06/02 19:19 upstream f3592877 c88c7b75 .config log syz
ci-upstream-kasan-gce-smack-root 2020/05/03 18:49 upstream f66ed1eb c88c7b75 .config log syz
ci-upstream-kasan-gce-smack-root 2020/04/03 11:57 upstream bef7b2a7 c88c7b75 .config log syz
Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-smack-root 2020/03/04 07:43 upstream 63623fd4 c88c7b75 .config log report syz bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, tglx@linutronix.de, x86@kernel.org