Reference in a new issue

Blame

Copy permalink

Reference in a new issue

Copy permalink

Darrick J. Wong ca19f8f510 iomap: reject delalloc mappings during writeback ... commit d320f160aa upstream. Filesystems should never provide a delayed allocation mapping to writeback; they're supposed to allocate the space before replying. This can lead to weird IO errors and crashes in the block layer if the filesystem is being malicious, or if it hadn't set iomap->dev because it's a delalloc mapping. Fix this by failing writeback on delalloc mappings. Currently no filesystems actually misbehave in this manner, but we ought to be stricter about things like that. Cc: stable@vger.kernel.org # v5.5 Fixes: 598ecfbaa7 ("iomap: lift the xfs writeback code to iomap") Signed-off-by: Darrick J. Wong <djwong@kernel.org> Link: https://patch.msgid.link/20260302173002.GL13829@frogsfrogsfrogs Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2026-03-19 16:08:35 +01:00
..
buffered-io.c	iomap: account for unaligned end offsets when truncating read range	2026-01-02 12:56:38 +01:00
direct-io.c	iomap: fix submission side handling of completion side errors	2026-02-26 14:59:00 -08:00
fiemap.c	iomap: header diet	2025-07-14 10:51:31 +02:00
internal.h	iomap: move all ioend handling to ioend.c	2025-07-14 10:51:32 +02:00
ioend.c	iomap: reject delalloc mappings during writeback	2026-03-19 16:08:35 +01:00
iter.c	iomap: header diet	2025-07-14 10:51:31 +02:00
Makefile	iomap: build the writeback code without CONFIG_BLOCK	2025-07-14 10:51:33 +02:00
seek.c	iomap: header diet	2025-07-14 10:51:31 +02:00
swapfile.c	iomap: header diet	2025-07-14 10:51:31 +02:00
trace.c	iomap: header diet	2025-07-14 10:51:31 +02:00
trace.h	iomap: trace iomap_zero_iter zeroing activities	2025-09-19 14:17:11 +02:00