| Message ID | 20170811151805.22896-1-hch@lst.de (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
On Fri, Aug 11, 2017 at 05:18:05PM +0200, Christoph Hellwig wrote: > Fix the min_t calls in the zeroing and dirtying helpers to perform the > comparisms on 64-bit types, which prevents them from incorrectly > being truncated, and larger zeroing operations being stuck in a never > ending loop. > > Special thanks to Markus Stockhausen for spotting the bug. > > Reported-by: Paul Menzel <pmenzel@molgen.mpg.de> > Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> Looks fine to me, Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> (Are you going to push this to Al yourself, or do you want me to drag it through the xfs tree?) > --- > fs/iomap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/iomap.c b/fs/iomap.c > index 039266128b7f..59cc98ad7577 100644 > --- a/fs/iomap.c > +++ b/fs/iomap.c > @@ -278,7 +278,7 @@ iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data, > unsigned long bytes; /* Bytes to write to page */ > > offset = (pos & (PAGE_SIZE - 1)); > - bytes = min_t(unsigned long, PAGE_SIZE - offset, length); > + bytes = min_t(loff_t, PAGE_SIZE - offset, length); > > rpage = __iomap_read_page(inode, pos); > if (IS_ERR(rpage)) > @@ -373,7 +373,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, > unsigned offset, bytes; > > offset = pos & (PAGE_SIZE - 1); /* Within page */ > - bytes = min_t(unsigned, PAGE_SIZE - offset, count); > + bytes = min_t(loff_t, PAGE_SIZE - offset, count); > > if (IS_DAX(inode)) > status = iomap_dax_zero(pos, offset, bytes, iomap); > -- > 2.11.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Aug 11, 2017 at 09:04:43AM -0700, Darrick J. Wong wrote: > Looks fine to me, > Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> > > (Are you going to push this to Al yourself, or do you want me to drag it > through the xfs tree?) In general we've maintained iomap.c through the XFS tree so far. I think it's easiest to stick to that. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Dear Christoph, On 2017-08-11 17:18, Christoph Hellwig wrote: > Fix the min_t calls in the zeroing and dirtying helpers to perform the > comparisms on 64-bit types, which prevents them from incorrectly > being truncated, and larger zeroing operations being stuck in a never > ending loop. > > Special thanks to Markus Stockhausen for spotting the bug. > > Reported-by: Paul Menzel <pmenzel@molgen.mpg.de> > Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> Thank you very much for providing the fix that quickly. Please don’t forget to tag it for the stable series (4.8+). Cc: stable@vger.kernel.org Kind regards, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Paul, I'm overdue doing another XFS stable backport batch, and I will include this patch. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Aug 11, 2017 at 06:06:58PM +0200, Christoph Hellwig wrote: > On Fri, Aug 11, 2017 at 09:04:43AM -0700, Darrick J. Wong wrote: > > Looks fine to me, > > Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> > > > > (Are you going to push this to Al yourself, or do you want me to drag it > > through the xfs tree?) > > In general we've maintained iomap.c through the XFS tree so far. > I think it's easiest to stick to that. Needs signed-off-by. :( --D > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Aug 16, 2017 at 02:52:55PM -0700, Darrick J. Wong wrote: > On Fri, Aug 11, 2017 at 06:06:58PM +0200, Christoph Hellwig wrote: > > On Fri, Aug 11, 2017 at 09:04:43AM -0700, Darrick J. Wong wrote: > > > Looks fine to me, > > > Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> > > > > > > (Are you going to push this to Al yourself, or do you want me to drag it > > > through the xfs tree?) > > > > In general we've maintained iomap.c through the XFS tree so far. > > I think it's easiest to stick to that. > > Needs signed-off-by. :( Feel free to add it: Reviewed-by: Christoph Hellwig <hch@lst.de> -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Dear Christoph, On 08/13/17 11:08, Christoph Hellwig wrote: > I'm overdue doing another XFS stable backport batch, and I will > include this patch. If I am not mistaken, this has not been picked up yet for the stable series. ``` $ git tag --contains e28ae8e428fefe2facd72cea9f29906ecb9c861d v4.13 v4.13-rc6 v4.13-rc7 v4.13.1 $ git log --grep e28ae8e428fefe2facd72cea9f29906ecb9c861d v4.9.48 $ ``` Do you want me to submit it for inclusion? Kind regards, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/iomap.c b/fs/iomap.c index 039266128b7f..59cc98ad7577 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -278,7 +278,7 @@ iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data, unsigned long bytes; /* Bytes to write to page */ offset = (pos & (PAGE_SIZE - 1)); - bytes = min_t(unsigned long, PAGE_SIZE - offset, length); + bytes = min_t(loff_t, PAGE_SIZE - offset, length); rpage = __iomap_read_page(inode, pos); if (IS_ERR(rpage)) @@ -373,7 +373,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, unsigned offset, bytes; offset = pos & (PAGE_SIZE - 1); /* Within page */ - bytes = min_t(unsigned, PAGE_SIZE - offset, count); + bytes = min_t(loff_t, PAGE_SIZE - offset, count); if (IS_DAX(inode)) status = iomap_dax_zero(pos, offset, bytes, iomap);
Fix the min_t calls in the zeroing and dirtying helpers to perform the comparisms on 64-bit types, which prevents them from incorrectly being truncated, and larger zeroing operations being stuck in a never ending loop. Special thanks to Markus Stockhausen for spotting the bug. Reported-by: Paul Menzel <pmenzel@molgen.mpg.de> Tested-by: Paul Menzel <pmenzel@molgen.mpg.de> --- fs/iomap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)