Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-07 22:42:04 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

block-6.6-2023-10-27

Browse Source 
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmU8EfwQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgps0tD/4zuSZLUJHBD4LKInUh6DmucwdaUbo4avSo
 xDeSok0GMmh/lNpUFXMZ+sa07Ts3v0quOuaBokphF1QQOrnGjV5UlqkbfYEru2HC
 T1LrQZyBDoXqxlb28PKSZyYoK9nRqIsDBYuRCK0tcW5dp8XaV7wgCFjLsLRQBVsQ
 KkRHeEolLapHzggjrFbxFvMNhM2D39krS26kW1TeER6tdOIj5kh57w9CelGhylNG
 WISMOVwq3qKsn2g+yCMgCRuYlrab0EH20ZLZhAWxBkJPMQ1Bd2nRSw85UKa72j4M
 y0y6ct1K/fCQdUdCJKNw5NcBW/wXnVpE7aE+eLYinjR2TBkFUodNtSW8Lz5usBuW
 VWyMWB2qPWEpxBlvn1gbIr3GYPRJsOFdaU0G3+Z8mSvSZxHZxZKjCrmdCYZpVTuc
 NBTiEy+mzoVBZ3f/y8KsQdSeLvl8QJK0Sc/Ds1l0hrcfuDPKBuo31pJaZFUqnJG1
 IzmPLXEL5kbjZDnBDT+aAqcM5O8yOul3AOKeTRj4RqSpmymsLbuKDzqLwDLFwauM
 mYKOLsVaFMszO0jSRktiM/iqlJzOD7VwYJi/yQylM7CLHhJRw2hhPdm6zd0aGehD
 kIUdpGnUyAFQCZ2B/a8HhENjViQO+SDxE4z3A8f7bJ+DsnhYq+FNOg2lbC8K8y+r
 Dk4QDuJilg==
 =sKO6
 -----END PGP SIGNATURE-----

Merge tag 'block-6.6-2023-10-27' of git://git.kernel.dk/linux

Pull block fix from Jens Axboe:
 "Just a single fix for a potential divide-by-zero, introduced in this
  cycle"

* tag 'block-6.6-2023-10-27' of git://git.kernel.dk/linux:
  blk-throttle: check for overflow in calculate_bytes_allowed
This commit is contained in:
Linus Torvalds 2023-10-27 14:01:59 -10:00
commit 2dc4e0f455
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block/blk-throttle.c
View File

@ -723,6 +723,12 @@ static unsigned int calculate_io_allowed(u32 iops_limit,
static u64 calculate_bytes_allowed(u64 bps_limit, unsigned long jiffy_elapsed)
{
/*
* Can result be wider than 64 bits?
* We check against 62, not 64, due to ilog2 truncation.
*/
if (ilog2(bps_limit) + ilog2(jiffy_elapsed) - ilog2(HZ) > 62)
return U64_MAX;
return mul_u64_u64_div_u64(bps_limit, (u64)jiffy_elapsed, (u64)HZ);
}