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| author | Raphael Pinsonneault-Thibeault <rpthibeault@gmail.com> | 2025-10-12 16:16:34 -0400 |
|---|---|---|
| committer | Konstantin Komarov <almaz.alexandrovich@paragon-software.com> | 2025-10-17 16:45:37 +0200 |
| commit | 73e6b9dacf72a1e7a4265eacca46f8f33e0997d6 (patch) | |
| tree | d894aec2124994e952816f9350efdce403b81c46 /scripts/lib/kdoc/kdoc_parser.py | |
| parent | 02f312754c873efe076888a2fdca982e56617929 (diff) | |
ntfs3: fix uninit memory after failed mi_read in mi_format_new
Fix a KMSAN un-init bug found by syzkaller.
ntfs_get_bh() expects a buffer from sb_getblk(), that buffer may not be
uptodate. We do not bring the buffer uptodate before setting it as
uptodate. If the buffer were to not be uptodate, it could mean adding a
buffer with un-init data to the mi record. Attempting to load that record
will trigger KMSAN.
Avoid this by setting the buffer as uptodate, if it’s not already, by
overwriting it.
Reported-by: syzbot+7a2ba6b7b66340cff225@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=7a2ba6b7b66340cff225
Tested-by: syzbot+7a2ba6b7b66340cff225@syzkaller.appspotmail.com
Fixes: 4342306f0f0d5 ("fs/ntfs3: Add file operations and implementation")
Signed-off-by: Raphael Pinsonneault-Thibeault <rpthibeault@gmail.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_parser.py')
0 files changed, 0 insertions, 0 deletions