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| author | Chen Yu <yu.c.chen@intel.com> | 2026-05-13 23:39:19 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-05-18 22:33:16 +0300 |
| commit | 9f23469401b04cfd9a5d0a8b61760a48cce35dc1 (patch) | |
| tree | 6f2b5b280086e3ef0a9f25363b565d693742c5a5 /include/linux/debugobjects.h | |
| parent | d943b86dfbf4e9b76be30cf90b1b3f82ff9abbac (diff) | |
| download | linux-9f23469401b04cfd9a5d0a8b61760a48cce35dc1.tar.xz | |
sched/cache: Fix potential NULL mm pointer access
A concurrent task exit might cause a NULL pointer dereference
in account_mm_sched(). Use the locally cached mm pointer instead,
since the active_mm reference guarantees the structure remains
allocated. Meanwhile, skip the kernel thread because it has
nothing to do with cache aware scheduling.
This bug was reported by sashiko and Vern.
Fixes: df0d98475954 ("sched/cache: Introduce infrastructure for cache-aware load balancing")
Reported-by: Vern Hao <haoxing990@gmail.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Co-developed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/09cf7ee3-6e27-4505-9692-4b4a4707c8b2@gmail.com/
Link: https://patch.msgid.link/066d8cfa45d4822bf4367e788c50377c66bbcc82.1778703694.git.tim.c.chen@linux.intel.com
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions