https://bugzilla.kernel.org/show_bug.cgi?id=219007 Bug ID: 219007 Summary: opening and closing /dev/dri/card0 in a QEMU KVM instance will shutdown system, 6.10.0-rc6+ Product: Drivers Version: 2.5 Hardware: All OS: Linux Status: NEW Severity: normal Priority: P3 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: colin.i.king@xxxxxxxxx Regression: No The following code when run as root on a Debian sid amd64 server running in virt-manager (KVM QEMU) will shut the system down with 6.10.0-rc6. The fork() is required to cause racing on the open/close on /dev/dri/card0 #include <fcntl.h> #include <unistd.h> int main(void) { pid_t pid = fork(); while (1) { int fd; fd = openat(AT_FDCWD, "/dev/dri/card0", O_WRONLY|O_NONBLOCK|O_SYNC); close(fd); } } This was originally found using: while true; do sudo ./stress-ng --dev 4 --dev-file /dev/dri/card0 -t 5; done and narrowed down to the above reproducer. (cf: https://github.com/ColinIanKing/stress-ng/issues/407 ) This does not occur on pre 6.10 kernels, so it looks like a 6.10 regression. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
