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| author | Ammar Faizi <ammarfaizi2@gnuweeb.org> | 2022-03-29 17:47:05 +0700 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-05 21:24:37 +0200 |
| commit | e5f28623ceb103e13fc3d7bd45edf9818b227fd0 (patch) | |
| tree | 9fd7e8fcb30f7f78c0480713ead8aa1af27f1280 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 9f1b19b977ee3cbd3fe9135ff63dbf221eac1d6a (diff) | |
| download | linux-e5f28623ceb103e13fc3d7bd45edf9818b227fd0.tar.gz linux-e5f28623ceb103e13fc3d7bd45edf9818b227fd0.tar.bz2 linux-e5f28623ceb103e13fc3d7bd45edf9818b227fd0.zip | |
x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails
In mce_threshold_create_device(), if threshold_create_bank() fails, the
previously allocated threshold banks array @bp will be leaked because
the call to mce_threshold_remove_device() will not free it.
This happens because mce_threshold_remove_device() fetches the pointer
through the threshold_banks per-CPU variable but bp is written there
only after the bank creation is successful, and not before, when
threshold_create_bank() fails.
Add a helper which unwinds all the bank creation work previously done
and pass into it the previously allocated threshold banks array for
freeing.
[ bp: Massage. ]
Fixes: 6458de97fc15 ("x86/mce/amd: Straighten CPU hotplug path")
Co-developed-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Signed-off-by: Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>
Co-developed-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220329104705.65256-3-ammarfaizi2@gnuweeb.org
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions