Re: [PATCH 6.12 0000/1202] 6.12.97-rc2 review

[Greg Kroah-Hartman]

On Thu, Jul 23, 2026 at 04:17:55PM +0100, Mark Brown wrote:
> On Wed, Jul 22, 2026 at 04:31:38PM +0200, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 6.12.97 release.
> > There are 1202 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> 
> I'm seeing a regression in the proc read kselftest which bisects to
> "proc: protect ptrace_may_access() with exec_update_lock (part 1)":
> 
> # selftests: proc: read
> [  167.845745] ICMPv6: process `read' is using deprecated sysctl (syscall) net.ipv6.neigh.default.base_reachable_time - use net.ipv6.neigh.default.base_reachable_time_ms instead
> [  167.914113] sysrq: HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w) replay-kernel-logs(R) 
> [  168.019358] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098
> 
> ...
> 
> [  168.270588] Call trace:
> [  168.273035]  rwsem_read_trylock+0x30/0xe0
> [  168.277047]  proc_map_files_readdir+0x94/0x3dc
> [  168.281498]  iterate_dir+0x118/0x224
> [  168.285077]  __arm64_sys_getdents64+0x70/0x160
> [  168.289524]  invoke_syscall+0x44/0xe4
> 
> Full log:
> 
>    https://lava.sirena.org.uk/scheduler/job/3014030#L10663

Odd, and this is not regressing in Linus's tree as well?  Did we miss
something that is needed here that mainline has?

thanks,

greg k-h