Diffusion FreeBSD src repository 7e4ac11b6076

getblkx(9): be more tolerant but also strict with the buffer size checks
7e4ac11b6076
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Description

getblkx(9): be more tolerant but also strict with the buffer size checks

It is possible that on-disk filesystem format causes allocation of
buffers of size larger than maxbcachebuf. Currently, getblkx() and
indirectly bufkva_alloc() panic in that situation.

It is more useful to return an error instead, allowing the system to
continue running.

PR: 277414
Reported by: Robert Morris <rtm@lcs.mit.edu>
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

Details

Provenance

kib	Authored on Mar 2 2024, 4:58 AM

Parents

rGbeadbca67bd8: read(2): Add write cross reference

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Event Timeline

kib committed rG7e4ac11b6076: getblkx(9): be more tolerant but also strict with the buffer size checks (authored by kib).Mar 2 2024, 5:02 AM

kib mentioned this in rGf7d51eb77e84: getblkx(9): be more tolerant but also strict with the buffer size checks.Mar 9 2024, 9:06 AM

kib mentioned this in rG1c1fde7540d8: getblkx(9): be more tolerant but also strict with the buffer size checks.

se mentioned this in D44319: Support 64KB cluster size in MSDOSFS.Mar 12 2024, 5:10 PM

Changes (1)

Path

Size

sys/

kern/

vfs_bio.c

rG7e4ac11b6076

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