The issue is fixed by reverting the following two patches:
commit b7bfa1af145a6aa3868894a4be82f7b2034c564a Author: Linus Torvalds <email address hidden> Date: Tue Jan 19 10:49:19 2021 -0800
tty: implement read_iter
BugLink: https://bugs.launchpad.net/bugs/1921960
[ Upstream commit dd78b0c483e33225e0e0782b0ed887129b00f956 ]
commit 4b71b60ef2cb9f930b8056049a1d8de170be42bc Author: Linus Torvalds <email address hidden> Date: Mon Jan 18 13:31:30 2021 -0800
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
[ Upstream commit 3b830a9c34d5897be07176ce4e6f2d75e2c8cfd7 ]
The issue is fixed by reverting the following two patches:
commit b7bfa1af145a6aa 3868894a4be82f7 b2034c564a
Author: Linus Torvalds <email address hidden>
Date: Tue Jan 19 10:49:19 2021 -0800
tty: implement read_iter
BugLink: https:/ /bugs.launchpad .net/bugs/ 1921960
[ Upstream commit dd78b0c483e3322 5e0e0782b0ed887 129b00f956 ]
commit 4b71b60ef2cb9f9 30b8056049a1d8d e170be42bc
Author: Linus Torvalds <email address hidden>
Date: Mon Jan 18 13:31:30 2021 -0800
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
BugLink: https:/ /bugs.launchpad .net/bugs/ 1921960
[ Upstream commit 3b830a9c34d5897 be07176ce4e6f2d 75e2c8cfd7 ]