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| author | Colin Ian King <colin.i.king@gmail.com> | 2024-12-04 15:39:23 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-12-23 08:20:00 -0700 |
| commit | febfbf767174b8a027efb7aa434f9a9416adc23d (patch) | |
| tree | 5009edfe5ba35faee86f6c4ed1814bb9bd96c059 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 546d191427cf5cf3215529744c2ea8558f0279db (diff) | |
io_uring/kbuf: fix unintentional sign extension on shift of reg.bgid
Shifting reg.bgid << IORING_OFF_PBUF_SHIFT results in a promotion
from __u16 to a 32 bit signed integer, this is then sign extended
to a 64 bit unsigned long on 64 bit architectures. If reg.bgid is
greater than 0x7fff then this leads to a sign extended result where
all the upper 32 bits of mmap_offset are set to 1. Fix this by
casting reg.bgid to the same type as mmap_offset before performing
the shift.
Fixes: ef62de3c4ad5 ("io_uring/kbuf: use region api for pbuf rings")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20241204153923.401674-1-colin.i.king@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions