наб e5c4f86e7a linux/spl: base proc_dohostid() on proc_dostring() ... This fixes /proc/sys/kernel/spl/hostid on kernels with mainline commit 32927393dc1ccd60fb2bdc05b9e8e88753761469 ("sysctl: pass kernel pointers to ->proc_handler") ‒ 5.7-rc1 and up The access_ok() check in copy_to_user() in proc_copyout_string() would always fail, so all userspace reads and writes would fail with EINVAL proc_dostring() strips only the final new-line, but simple_strtoul() doesn't actually need a back-trimmed string ‒ writing "012345678 \n" is still allowed, as is "012345678zupsko", &c. This alters what happens when an invalid value is written ‒ previously it'd get set to what-ever simple_strtoul() returned (probably 0, thereby resetting it to default), now it does nothing Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #11878 Closes #11879		2021-04-19 15:22:57 -07:00
..
freebsd	FreeBSD: use vnlru_free_vfsops if available	2021-04-14 13:23:08 -07:00
linux	linux/spl: base proc_dohostid() on proc_dostring()	2021-04-19 15:22:57 -07:00