Message ID | 165267193475.625255.2721960601959913094.stgit@magnolia (mailing list archive) |
---|---|
State | Accepted |
Headers | show |
Series | xfs: fix leaks and validation errors in logged xattr updates | expand |
On Sun, 2022-05-15 at 20:32 -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <djwong@kernel.org> > > Make sure we screen the "attr flags" field of recovered xattr intent > log > items to reject flag bits that we don't know about. This is really > the > attr *filter* flags, so rename the field and create properly > namespaced > flags to fill it. > > Signed-off-by: Darrick J. Wong <djwong@kernel.org> > --- > fs/xfs/libxfs/xfs_log_format.h | 9 ++++++++- > fs/xfs/xfs_attr_item.c | 10 +++++++--- > 2 files changed, 15 insertions(+), 4 deletions(-) > > > diff --git a/fs/xfs/libxfs/xfs_log_format.h > b/fs/xfs/libxfs/xfs_log_format.h > index f7edd1ecf6d9..5017500bfd8b 100644 > --- a/fs/xfs/libxfs/xfs_log_format.h > +++ b/fs/xfs/libxfs/xfs_log_format.h > @@ -911,6 +911,13 @@ struct xfs_icreate_log { > #define XFS_ATTR_OP_FLAGS_REPLACE 3 /* Replace the attribute */ > #define XFS_ATTR_OP_FLAGS_TYPE_MASK 0xFF /* Flags type mask */ > > +#define XFS_ATTRI_FILTER_ROOT (1u << > XFS_ATTR_ROOT_BIT) > +#define XFS_ATTRI_FILTER_SECURE (1u << > XFS_ATTR_SECURE_BIT) > +#define XFS_ATTRI_FILTER_INCOMPLETE (1u << XFS_ATTR_INCOMPLETE_BIT) > +#define XFS_ATTRI_FILTER_MASK (XFS_ATTRI_FILTER_ROOT > | \ > + XFS_ATTRI_FILTER_SECURE | \ > + XFS_ATTRI_FILTER_INCOMPLETE) > + It sounds like your already working on a v2 that doesnt use the new flag scheme, but other than that, I think it looks ok. Thanks! Allison > /* > * This is the structure used to lay out an attr log item in the > * log. > @@ -924,7 +931,7 @@ struct xfs_attri_log_format { > uint32_t alfi_op_flags; /* marks the op as a set or remove */ > uint32_t alfi_name_len; /* attr name length */ > uint32_t alfi_value_len; /* attr value length */ > - uint32_t alfi_attr_flags;/* attr flags */ > + uint32_t alfi_attr_filter;/* attr filter flags */ > }; > > struct xfs_attrd_log_format { > diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c > index 459b6c93b40b..7cbb640d7856 100644 > --- a/fs/xfs/xfs_attr_item.c > +++ b/fs/xfs/xfs_attr_item.c > @@ -353,7 +353,8 @@ xfs_attr_log_item( > XFS_ATTR_OP_FLAGS_TYPE_ > MASK; > attrp->alfi_value_len = attr->xattri_da_args->valuelen; > attrp->alfi_name_len = attr->xattri_da_args->namelen; > - attrp->alfi_attr_flags = attr->xattri_da_args->attr_filter; > + attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter & > + XFS_ATTRI_FILTER_MASK; > > memcpy(attrip->attri_name, attr->xattri_da_args->name, > attr->xattri_da_args->namelen); > @@ -500,6 +501,9 @@ xfs_attri_validate( > if (attrp->alfi_op_flags & ~XFS_ATTR_OP_FLAGS_TYPE_MASK) > return false; > > + if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK) > + return false; > + > /* alfi_op_flags should be either a set or remove */ > switch (op) { > case XFS_ATTR_OP_FLAGS_SET: > @@ -569,7 +573,7 @@ xfs_attri_item_recover( > args->name = attrip->attri_name; > args->namelen = attrp->alfi_name_len; > args->hashval = xfs_da_hashname(args->name, args->namelen); > - args->attr_filter = attrp->alfi_attr_flags; > + args->attr_filter = attrp->alfi_attr_filter & > XFS_ATTRI_FILTER_MASK; > args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT; > > switch (attr->xattri_op_flags) { > @@ -658,7 +662,7 @@ xfs_attri_item_relog( > new_attrp->alfi_op_flags = old_attrp->alfi_op_flags; > new_attrp->alfi_value_len = old_attrp->alfi_value_len; > new_attrp->alfi_name_len = old_attrp->alfi_name_len; > - new_attrp->alfi_attr_flags = old_attrp->alfi_attr_flags; > + new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter; > > memcpy(new_attrip->attri_name, old_attrip->attri_name, > new_attrip->attri_name_len); >
On Mon, May 16, 2022 at 04:56:20PM -0700, Alli wrote: > On Sun, 2022-05-15 at 20:32 -0700, Darrick J. Wong wrote: > > From: Darrick J. Wong <djwong@kernel.org> > > > > Make sure we screen the "attr flags" field of recovered xattr intent > > log > > items to reject flag bits that we don't know about. This is really > > the > > attr *filter* flags, so rename the field and create properly > > namespaced > > flags to fill it. > > > > Signed-off-by: Darrick J. Wong <djwong@kernel.org> > > --- > > fs/xfs/libxfs/xfs_log_format.h | 9 ++++++++- > > fs/xfs/xfs_attr_item.c | 10 +++++++--- > > 2 files changed, 15 insertions(+), 4 deletions(-) > > > > > > diff --git a/fs/xfs/libxfs/xfs_log_format.h > > b/fs/xfs/libxfs/xfs_log_format.h > > index f7edd1ecf6d9..5017500bfd8b 100644 > > --- a/fs/xfs/libxfs/xfs_log_format.h > > +++ b/fs/xfs/libxfs/xfs_log_format.h > > @@ -911,6 +911,13 @@ struct xfs_icreate_log { > > #define XFS_ATTR_OP_FLAGS_REPLACE 3 /* Replace the attribute */ > > #define XFS_ATTR_OP_FLAGS_TYPE_MASK 0xFF /* Flags type mask */ > > > > +#define XFS_ATTRI_FILTER_ROOT (1u << > > XFS_ATTR_ROOT_BIT) > > +#define XFS_ATTRI_FILTER_SECURE (1u << > > XFS_ATTR_SECURE_BIT) > > +#define XFS_ATTRI_FILTER_INCOMPLETE (1u << XFS_ATTR_INCOMPLETE_BIT) > > +#define XFS_ATTRI_FILTER_MASK (XFS_ATTRI_FILTER_ROOT > > | \ > > + XFS_ATTRI_FILTER_SECURE | \ > > + XFS_ATTRI_FILTER_INCOMPLETE) > > + > It sounds like your already working on a v2 that doesnt use the new > flag scheme, but other than that, I think it looks ok. Thanks! Yeah. The new patch simply defines XFS_ATTRI_FILTER_MASK and reuses the existing XFS_ATTR_{ROOT,SECURE,INCOMPLETE} flags: /* * alfi_attr_filter captures the state of xfs_da_args.attr_filter, so * it should never have any other bits set. */ #define XFS_ATTRI_FILTER_MASK (XFS_ATTR_ROOT | \ XFS_ATTR_SECURE | \ XFS_ATTR_INCOMPLETE) --D > Allison > > > /* > > * This is the structure used to lay out an attr log item in the > > * log. > > @@ -924,7 +931,7 @@ struct xfs_attri_log_format { > > uint32_t alfi_op_flags; /* marks the op as a set or remove */ > > uint32_t alfi_name_len; /* attr name length */ > > uint32_t alfi_value_len; /* attr value length */ > > - uint32_t alfi_attr_flags;/* attr flags */ > > + uint32_t alfi_attr_filter;/* attr filter flags */ > > }; > > > > struct xfs_attrd_log_format { > > diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c > > index 459b6c93b40b..7cbb640d7856 100644 > > --- a/fs/xfs/xfs_attr_item.c > > +++ b/fs/xfs/xfs_attr_item.c > > @@ -353,7 +353,8 @@ xfs_attr_log_item( > > XFS_ATTR_OP_FLAGS_TYPE_ > > MASK; > > attrp->alfi_value_len = attr->xattri_da_args->valuelen; > > attrp->alfi_name_len = attr->xattri_da_args->namelen; > > - attrp->alfi_attr_flags = attr->xattri_da_args->attr_filter; > > + attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter & > > + XFS_ATTRI_FILTER_MASK; > > > > memcpy(attrip->attri_name, attr->xattri_da_args->name, > > attr->xattri_da_args->namelen); > > @@ -500,6 +501,9 @@ xfs_attri_validate( > > if (attrp->alfi_op_flags & ~XFS_ATTR_OP_FLAGS_TYPE_MASK) > > return false; > > > > + if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK) > > + return false; > > + > > /* alfi_op_flags should be either a set or remove */ > > switch (op) { > > case XFS_ATTR_OP_FLAGS_SET: > > @@ -569,7 +573,7 @@ xfs_attri_item_recover( > > args->name = attrip->attri_name; > > args->namelen = attrp->alfi_name_len; > > args->hashval = xfs_da_hashname(args->name, args->namelen); > > - args->attr_filter = attrp->alfi_attr_flags; > > + args->attr_filter = attrp->alfi_attr_filter & > > XFS_ATTRI_FILTER_MASK; > > args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT; > > > > switch (attr->xattri_op_flags) { > > @@ -658,7 +662,7 @@ xfs_attri_item_relog( > > new_attrp->alfi_op_flags = old_attrp->alfi_op_flags; > > new_attrp->alfi_value_len = old_attrp->alfi_value_len; > > new_attrp->alfi_name_len = old_attrp->alfi_name_len; > > - new_attrp->alfi_attr_flags = old_attrp->alfi_attr_flags; > > + new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter; > > > > memcpy(new_attrip->attri_name, old_attrip->attri_name, > > new_attrip->attri_name_len); > > >
diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h index f7edd1ecf6d9..5017500bfd8b 100644 --- a/fs/xfs/libxfs/xfs_log_format.h +++ b/fs/xfs/libxfs/xfs_log_format.h @@ -911,6 +911,13 @@ struct xfs_icreate_log { #define XFS_ATTR_OP_FLAGS_REPLACE 3 /* Replace the attribute */ #define XFS_ATTR_OP_FLAGS_TYPE_MASK 0xFF /* Flags type mask */ +#define XFS_ATTRI_FILTER_ROOT (1u << XFS_ATTR_ROOT_BIT) +#define XFS_ATTRI_FILTER_SECURE (1u << XFS_ATTR_SECURE_BIT) +#define XFS_ATTRI_FILTER_INCOMPLETE (1u << XFS_ATTR_INCOMPLETE_BIT) +#define XFS_ATTRI_FILTER_MASK (XFS_ATTRI_FILTER_ROOT | \ + XFS_ATTRI_FILTER_SECURE | \ + XFS_ATTRI_FILTER_INCOMPLETE) + /* * This is the structure used to lay out an attr log item in the * log. @@ -924,7 +931,7 @@ struct xfs_attri_log_format { uint32_t alfi_op_flags; /* marks the op as a set or remove */ uint32_t alfi_name_len; /* attr name length */ uint32_t alfi_value_len; /* attr value length */ - uint32_t alfi_attr_flags;/* attr flags */ + uint32_t alfi_attr_filter;/* attr filter flags */ }; struct xfs_attrd_log_format { diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c index 459b6c93b40b..7cbb640d7856 100644 --- a/fs/xfs/xfs_attr_item.c +++ b/fs/xfs/xfs_attr_item.c @@ -353,7 +353,8 @@ xfs_attr_log_item( XFS_ATTR_OP_FLAGS_TYPE_MASK; attrp->alfi_value_len = attr->xattri_da_args->valuelen; attrp->alfi_name_len = attr->xattri_da_args->namelen; - attrp->alfi_attr_flags = attr->xattri_da_args->attr_filter; + attrp->alfi_attr_filter = attr->xattri_da_args->attr_filter & + XFS_ATTRI_FILTER_MASK; memcpy(attrip->attri_name, attr->xattri_da_args->name, attr->xattri_da_args->namelen); @@ -500,6 +501,9 @@ xfs_attri_validate( if (attrp->alfi_op_flags & ~XFS_ATTR_OP_FLAGS_TYPE_MASK) return false; + if (attrp->alfi_attr_filter & ~XFS_ATTRI_FILTER_MASK) + return false; + /* alfi_op_flags should be either a set or remove */ switch (op) { case XFS_ATTR_OP_FLAGS_SET: @@ -569,7 +573,7 @@ xfs_attri_item_recover( args->name = attrip->attri_name; args->namelen = attrp->alfi_name_len; args->hashval = xfs_da_hashname(args->name, args->namelen); - args->attr_filter = attrp->alfi_attr_flags; + args->attr_filter = attrp->alfi_attr_filter & XFS_ATTRI_FILTER_MASK; args->op_flags = XFS_DA_OP_RECOVERY | XFS_DA_OP_OKNOENT; switch (attr->xattri_op_flags) { @@ -658,7 +662,7 @@ xfs_attri_item_relog( new_attrp->alfi_op_flags = old_attrp->alfi_op_flags; new_attrp->alfi_value_len = old_attrp->alfi_value_len; new_attrp->alfi_name_len = old_attrp->alfi_name_len; - new_attrp->alfi_attr_flags = old_attrp->alfi_attr_flags; + new_attrp->alfi_attr_filter = old_attrp->alfi_attr_filter; memcpy(new_attrip->attri_name, old_attrip->attri_name, new_attrip->attri_name_len);