diff options
| author | Thomas Gleixner <[email protected]> | 2018-01-16 19:59:59 +0100 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-01-17 11:56:47 +0100 |
| commit | d47924417319e3b6a728c0b690f183e75bc2a702 (patch) | |
| tree | 89ee808f14ffb67f1adb34ee65b1478c343757c7 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 107cd2532181b96c549e8f224cdcca8631c3076b (diff) | |
x86/intel_rdt/cqm: Prevent use after free
intel_rdt_iffline_cpu() -> domain_remove_cpu() frees memory first and then
proceeds accessing it.
BUG: KASAN: use-after-free in find_first_bit+0x1f/0x80
Read of size 8 at addr ffff883ff7c1e780 by task cpuhp/31/195
find_first_bit+0x1f/0x80
has_busy_rmid+0x47/0x70
intel_rdt_offline_cpu+0x4b4/0x510
Freed by task 195:
kfree+0x94/0x1a0
intel_rdt_offline_cpu+0x17d/0x510
Do the teardown first and then free memory.
Fixes: 24247aeeabe9 ("x86/intel_rdt/cqm: Improve limbo list processing")
Reported-by: Joseph Salisbury <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Ravi Shankar <[email protected]>
Cc: Peter Zilstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Vikas Shivappa <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: "Roderick W. Smith" <[email protected]>
Cc: [email protected]
Cc: Fenghua Yu <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801161957510.2366@nanos
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions