https://github.com/torvalds/linux
Revision 2d8ce70a08fe033c904115d59276ad86adeaa337 authored by Goffredo Baroncelli on 03 October 2017, 17:31:10 UTC, committed by David Sterba on 04 October 2017, 14:22:56 UTC
Jean-Denis Girard noticed commit c821e7f3 "pass bytes to
btrfs_bio_alloc" (https://patchwork.kernel.org/patch/9763081/)
introduces a regression on 32 bit machines.
When CONFIG_LBDAF is _not_ defined (CONFIG_LBDAF == Support for large
(2TB+) block devices and files) sector_t is 32 bit on 32bit machines.
In the function submit_extent_page, 'sector' (which is sector_t type) is
multiplied by 512 to convert it from sectors to bytes, leading to an
overflow when the disk is bigger than 4GB (!).
I added a cast to u64 to avoid overflow.
Fixes: c821e7f3 ("btrfs: pass bytes to btrfs_bio_alloc")
CC: stable@vger.kernel.org # 4.13+
Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
Tested-by: Jean-Denis Girard <jd.girard@sysnux.pf>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 parent 8c6c592
Tip revision: 2d8ce70a08fe033c904115d59276ad86adeaa337 authored by Goffredo Baroncelli on 03 October 2017, 17:31:10 UTC
btrfs: avoid overflow when sector_t is 32 bit
btrfs: avoid overflow when sector_t is 32 bit
Tip revision: 2d8ce70
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| MAINTAINERS | -rw-r--r-- | 411.0 KB |
| Makefile | -rw-r--r-- | 58.8 KB |
| README | -rw-r--r-- | 722 bytes |
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