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Change History

In the Linux kernel, the following vulnerability has been resolved:

block: Fix iterating over an empty bio with bio_for_each_folio_all

If the bio contains no data, bio_first_folio() calls page_folio() on a
NULL pointer and oopses.  Move the test that we've reached the end of
the bio from bio_next_folio() to bio_first_folio().

[axboe: add unlikely() to error case]

kernel.org https://git.kernel.org/stable/c/7bed6f3d08b7af27b7015da8dc3acf2b9c1f21d7 [No types assigned]

kernel.org https://git.kernel.org/stable/c/a6bd8182137a12d22d3f2cee463271bdcb491659 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c6350b5cb78e9024c49eaee6fdb914ad2903a5fe [No types assigned]

kernel.org https://git.kernel.org/stable/c/ca3ede3f5893e2d26d4dbdef1eec28a8487fafde [No types assigned]