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Differential D30198

vfs: Fix error handling in vn_fullpath_hardlink()
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Authored by markj on May 10 2021, 8:35 PM.
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kib
mjg
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rG8b59c6af27d1: vfs: Fix error handling in vn_fullpath_hardlink()
rGc8bbb1272c8b: vfs: Fix error handling in vn_fullpath_hardlink()
Summary

vn_fullpath_any_smr() will return a positive error number if the
caller-supplied buffer isn't big enough. In this case the error must be
propagated up, otherwise we may copy out uninitialized bytes.

Reported by: syzkaller+KMSAN

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rG FreeBSD src repository
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sys/
kern/
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sys/kern/vfs_cache.c

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