btrfs: exit after state insertion failure at btrfs_convert_extent_bit()
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EPSS
EPSS 0.19 % · centile 8 (2026-10-27)
État
PUBLISHED
Publiée
Mise à jour
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Linux
Statut NVD
Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: exit after state insertion failure at btrfs_convert_extent_bit()
If insert_state() state failed it returns an error pointer and we call
extent_io_tree_panic() which will trigger a BUG() call. However if
CONFIG_BUG is disabled, which is an uncommon and exotic scenario, then
we fallthrough and call cache_state() which will dereference the error
pointer, resulting in an invalid memory access.
So jump to the 'out' label after calling extent_io_tree_panic(), it also
makes the code more clear besides dealing with the exotic scenario where
CONFIG_BUG is disabled.
