btrfs: protect sb_write_pointer() with invalidate lock

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sb_write_pointer() reads the super block from the block device page cache
using read_cache_page_gfp(). This has the same race with BLKBSZSET as the
one fixed by commit 3f29d661e5 ("btrfs: sync read disk super and set
block size").

Take the mapping invalidate lock around read_cache_page_gfp() to
serialize the read against block size changes.

Signed-off-by: KangNing Liao <lkangn.kernel@gmail.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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KangNing Liao 2026-05-21 20:29:45 +08:00 • committed by Filipe Manana

parent d8576024fa

commit 123b9a545f

1 changed files with 2 additions and 0 deletions

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fs/btrfs/zoned.c

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