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| author | Colin Ian King <colin.king@canonical.com> | 2020-10-29 15:11:03 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-11-10 18:38:49 +0100 |
| commit | 8d4d9c7b4333abccb3bf310d76ef7ea2edb9828f (patch) | |
| tree | e3a18d575d44955453501aa05b0dee98184162c5 /kernel/trace | |
| parent | b4c9c9f15649c98a5b45408919d1ff4fd7f5531c (diff) | |
| download | linux-8d4d9c7b4333abccb3bf310d76ef7ea2edb9828f.tar.bz2 | |
sched/debug: Fix memory corruption caused by multiple small reads of flags
Reading /proc/sys/kernel/sched_domain/cpu*/domain0/flags mutliple times
with small reads causes oopses with slub corruption issues because the kfree is
free'ing an offset from a previous allocation. Fix this by adding in a new
pointer 'buf' for the allocation and kfree and use the temporary pointer tmp
to handle memory copies of the buf offsets.
Fixes: 5b9f8ff7b320 ("sched/debug: Output SD flag names rather than their values")
Reported-by: Jeff Bastian <jbastian@redhat.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20201029151103.373410-1-colin.king@canonical.com
Diffstat (limited to 'kernel/trace')
0 files changed, 0 insertions, 0 deletions