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| author | Vikram Mulukutla <markivx@codeaurora.org> | 2014-12-17 18:50:56 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-06 14:52:55 -0800 |
| commit | d2c8636c468a28c2398e21debdcce56bddeea309 (patch) | |
| tree | 8df4b11ac3eecb81fd3a9f0e1b106828691e2a14 /block | |
| parent | bebc511a44cbb8473a0bbd90be7de3c04729a676 (diff) | |
| download | linux-stable-d2c8636c468a28c2398e21debdcce56bddeea309.tar.gz linux-stable-d2c8636c468a28c2398e21debdcce56bddeea309.tar.bz2 linux-stable-d2c8636c468a28c2398e21debdcce56bddeea309.zip | |
tracing: Fix unmapping loop in tracing_mark_write
commit 7215853e985a4bef1a6c14e00e89dfec84f1e457 upstream.
Commit 6edb2a8a385f0cdef51dae37ff23e74d76d8a6ce introduced
an array map_pages that contains the addresses returned by
kmap_atomic. However, when unmapping those pages, map_pages[0]
is unmapped before map_pages[1], breaking the nesting requirement
as specified in the documentation for kmap_atomic/kunmap_atomic.
This was caught by the highmem debug code present in kunmap_atomic.
Fix the loop to do the unmapping properly.
Link: http://lkml.kernel.org/r/1418871056-6614-1-git-send-email-markivx@codeaurora.org
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Reported-by: Lime Yang <limey@codeaurora.org>
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions