diff options
| author | Rik van Riel | 2023-08-17 13:55:58 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-10-06 14:56:39 +0200 |
| commit | eef16bfdb212da60f5144689f2967fb25b051a2b (patch) | |
| tree | 1773dbf27f2c926ef68d21c6c58a639489a97645 /lib/test_hmm_uapi.h | |
| parent | 73be49248a04746096339a48a33fa2f03bd85969 (diff) | |
x86/mm, kexec, ima: Use memblock_free_late() from ima_free_kexec_buffer()
[ Upstream commit 34cf99c250d5cd2530b93a57b0de31d3aaf8685b ]
The code calling ima_free_kexec_buffer() runs long after the memblock
allocator has already been torn down, potentially resulting in a use
after free in memblock_isolate_range().
With KASAN or KFENCE, this use after free will result in a BUG
from the idle task, and a subsequent kernel panic.
Switch ima_free_kexec_buffer() over to memblock_free_late() to avoid
that bug.
Fixes: fee3ff99bc67 ("powerpc: Move arch independent ima kexec functions to drivers/of/kexec.c")
Suggested-by: Mike Rappoport <rppt@kernel.org>
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230817135558.67274c83@imladris.surriel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib/test_hmm_uapi.h')
0 files changed, 0 insertions, 0 deletions