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| author | Mikulas Patocka <mpatocka@redhat.com> | 2019-08-23 15:54:09 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2019-08-23 16:11:42 +0200 |
| commit | 1cfd5d3399e87167b7f9157ef99daa0e959f395d (patch) | |
| tree | 034851b363826a16d05f251473bf526b895f80c3 /fs | |
| parent | dm space map metadata: fix missing store of apply_bops() return value (diff) | |
| download | linux-1cfd5d3399e87167b7f9157ef99daa0e959f395d.tar.xz linux-1cfd5d3399e87167b7f9157ef99daa0e959f395d.zip | |
dm table: fix invalid memory accesses with too high sector number
If the sector number is too high, dm_table_find_target() should return a
pointer to a zeroed dm_target structure (the caller should test it with
dm_target_is_valid).
However, for some table sizes, the code in dm_table_find_target() that
performs btree lookup will access out of bound memory structures.
Fix this bug by testing the sector number at the beginning of
dm_table_find_target(). Also, add an "inline" keyword to the function
dm_table_get_size() because this is a hot path.
Fixes: 512875bd9661 ("dm: table detect io beyond device")
Cc: stable@vger.kernel.org
Reported-by: Zhang Tao <kontais@zoho.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions