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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-08-03 10:30:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-08-03 10:30:05 +0100 |
| commit | e0d407564b532d978b03ceccebd224a05d02f111 (patch) | |
| tree | fe3149db4e412e4f1d1e11941fcc260c0e5d287e /ipc | |
| parent | a5463cd3435475386cbbe7b06e01292ac169d36f (diff) | |
| download | linux-e0d407564b532d978b03ceccebd224a05d02f111.tar.bz2 | |
ARM: fix a cockup in 48be69a02 (ARM: move signal handlers into a vdso-like page)
Unfortunately, I never committed the fix to a nasty oops which can
occur as a result of that commit:
------------[ cut here ]------------
kernel BUG at /home/olof/work/batch/include/linux/mm.h:414!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 490 Comm: killall5 Not tainted 3.11.0-rc3-00288-gabe0308 #53
task: e90acac0 ti: e9be8000 task.ti: e9be8000
PC is at special_mapping_fault+0xa4/0xc4
LR is at __do_fault+0x68/0x48c
This doesn't show up unless you do quite a bit of testing; a simple
boot test does not do this, so all my nightly tests were passing fine.
The reason for this is that install_special_mapping() expects the
page array to stick around, and as this was only inserting one page
which was stored on the kernel stack, that's why this was blowing up.
Reported-by: Olof Johansson <olof@lixom.net>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions