Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
+6
+6
block/blk-throttle.c
+6
block/blk-throttle.c
···
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static u64 calculate_bytes_allowed(u64 bps_limit, unsigned long jiffy_elapsed)
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{
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/*
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* Can result be wider than 64 bits?
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* We check against 62, not 64, due to ilog2 truncation.
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*/
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if (ilog2(bps_limit) + ilog2(jiffy_elapsed) - ilog2(HZ) > 62)
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return U64_MAX;
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return mul_u64_u64_div_u64(bps_limit, (u64)jiffy_elapsed, (u64)HZ);
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}
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