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| author | Mikulas Patocka <[email protected]> | 2023-07-03 17:12:39 +0200 |
|---|---|---|
| committer | Mike Snitzer <[email protected]> | 2023-07-25 11:55:50 -0400 |
| commit | d4a3806bea61c8ef6e0103d0f39786e00586522e (patch) | |
| tree | 2e91b285586b756330b1ac52c8fa44095f7fbf6a /lib/test_fortify/write_overflow-memcpy.c | |
| parent | fdf0eaf11452d72945af31804e2a1048ee1b574c (diff) | |
dm integrity: fix double free on memory allocation failure
If the statement "recalc_tags = kvmalloc(recalc_tags_size, GFP_NOIO);"
fails, we call "vfree(recalc_buffer)" and we jump to the label "oom".
If the condition "recalc_sectors >= 1U << ic->sb->log2_sectors_per_block"
is false, we jump to the label "free_ret" and call "vfree(recalc_buffer)"
again, on an already released memory block.
Fix the bug by setting "recalc_buffer = NULL" after freeing it.
Fixes: da8b4fc1f63a ("dm integrity: only allocate recalculate buffer when needed")
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Diffstat (limited to 'lib/test_fortify/write_overflow-memcpy.c')
0 files changed, 0 insertions, 0 deletions