Hi, On 25. 04. 24, 20:01, Dianne Skoll wrote:
I have (somewhat) narrowed down when the kernel bug appeared by installing Debian 10, 11 and 12 in KVM virtual machines. The bug is NOT present in Debian 10, kernel version 4.19.67.
I can repro even with 4.19: posix_openpt = 3 grantpt(3) = 0 unlockpt(3) = 0 ptsname(3) = /dev/pts/2 open(/dev/pts/2) = 4 ioctl(3, TIOCSETD) = 0 ioctl(4, TIOCSETD) = 0 write(3, Hello , 6) = 6 write(3, world, 5) = 5 read(4, buf, 2048) = 6 buf = |Hello | read(4, buf, 2048) = 5 buf = |world| read(4, buf, 2048) = -1 write(3, Hello , 6) = 6 write(3, world, 5) = 5 read(4, buf, 2048) = 11 buf = |Hello world| HAHA! Try #2: The two writes were combined in a single read! Could you recheck?
The bug IS present in Debian 11, kernel version 5.10.209 The bug IS present in Debian 12, kernel version 6.1.85 So I guess it was introduced sometime between 4.19.67 and 5.10.209. I'll take a look to see if I can do a git bisect.
Were you able to do so? thanks, -- js suse labs
