Syzbot found an issue [1] in ext4_fallocate().
The C reproducer [2] calls fallocate(), passing size 0xffeffeff000ul,
and offset 0x1000000ul, which, when added together exceed the disk size,
and trigger a BUG in ext4_ind_remove_space() [3].
According to the comment doc in ext4_ind_remove_space() the 'end' block
parameter needs to be one block after the last block to remove.
In the case when the BUG is triggered it points to the last block on
a 4GB virtual disk image. This is calculated in
ext4_ind_remove_space() in [4].
This patch adds a check that ensure the length + offest to be
within the valid range and returns -ENOSPC error code in case
it is invalid.
LINK: [1] https://syzkaller.appspot.com/bug?id=b80bd9cf348aac724a4f4dff251800106d7213…
LINK: [2] https://syzkaller.appspot.com/text?tag=ReproC&x=14ba0238700000
LINK: [3] https://elixir.bootlin.com/linux/v5.17-rc8/source/fs/ext4/indirect.c#L1244
LINK: [4] https://elixir.bootlin.com/linux/v5.17-rc8/source/fs/ext4/indirect.c#L1234
Cc: Theodore Ts'o <tytso(a)mit.edu>
Cc: Andreas Dilger <adilger.kernel(a)dilger.ca>
Cc: Ritesh Harjani <riteshh(a)linux.ibm.com>
Cc: <linux-ext4(a)vger.kernel.org>
Cc: <stable(a)vger.kernel.org>
Cc: <linux-kernel(a)vger.kernel.org>
Fixes: a4bb6b64e39a ("ext4: enable "punch hole" functionality")
Reported-by: syzbot+7a806094edd5d07ba029(a)syzkaller.appspotmail.com
Signed-off-by: Tadeusz Struk <tadeusz.struk(a)linaro.org>
--
v2: Change sbi->s_blocksize to inode->i_sb->s_blocksize in maxlength
computation.
---
fs/ext4/inode.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 01c9e4f743ba..355384007d11 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3924,7 +3924,8 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
struct super_block *sb = inode->i_sb;
ext4_lblk_t first_block, stop_block;
struct address_space *mapping = inode->i_mapping;
- loff_t first_block_offset, last_block_offset;
+ loff_t first_block_offset, last_block_offset, max_length;
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
handle_t *handle;
unsigned int credits;
int ret = 0, ret2 = 0;
@@ -3967,6 +3968,16 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
offset;
}
+ /*
+ * For punch hole the length + offset needs to be at least within
+ * one block before last
+ */
+ max_length = sbi->s_bitmap_maxbytes - inode->i_sb->s_blocksize;
+ if (offset + length >= max_length) {
+ ret = -ENOSPC;
+ goto out_mutex;
+ }
+
if (offset & (sb->s_blocksize - 1) ||
(offset + length) & (sb->s_blocksize - 1)) {
/*
--
2.35.1
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Component match callback functions need to check if expected data is
passed to them. Without this check, it can cause a NULL pointer
dereference when another driver registers a component before i915
drivers have their component master fully bind.
Fixes: 1e8d19d9b0dfc ("mei: hdcp: bind only with i915 on the same PCH")
Fixes: c2004ce99ed73 ("mei: pxp: export pavp client to me client bus")
Suggested-by: Heikki Krogerus <heikki.krogerus(a)linux.intel.com>
Suggested-by: Mika Westerberg <mika.westerberg(a)linux.intel.com>
Signed-off-by: Won Chung <wonchung(a)google.com>
Cc: stable(a)vger.kernel.org
---
Changes from v2:
- Correctly add "Suggested-by" tag
- Add "Cc: stable(a)vger.kernel.org"
Changes from v1:
- Add "Fixes" tag
- Send to stable(a)vger.kernel.org
drivers/misc/mei/hdcp/mei_hdcp.c | 2 +-
drivers/misc/mei/pxp/mei_pxp.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index ec2a4fce8581..843dbc2b21b1 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -784,7 +784,7 @@ static int mei_hdcp_component_match(struct device *dev, int subcomponent,
{
struct device *base = data;
- if (strcmp(dev->driver->name, "i915") ||
+ if (!base || !dev->driver || strcmp(dev->driver->name, "i915") ||
subcomponent != I915_COMPONENT_HDCP)
return 0;
diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c
index f7380d387bab..e32a81da8af6 100644
--- a/drivers/misc/mei/pxp/mei_pxp.c
+++ b/drivers/misc/mei/pxp/mei_pxp.c
@@ -131,7 +131,7 @@ static int mei_pxp_component_match(struct device *dev, int subcomponent,
{
struct device *base = data;
- if (strcmp(dev->driver->name, "i915") ||
+ if (!base || !dev->driver || strcmp(dev->driver->name, "i915") ||
subcomponent != I915_COMPONENT_PXP)
return 0;
--
2.35.1.1021.g381101b075-goog
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Re-enable the registration of algorithms after fixes to (1) use
pre-allocated buffers in the datapath and (2) support the
CRYPTO_TFM_REQ_MAY_BACKLOG flag.
This reverts commit 8893d27ffcaf6ec6267038a177cb87bcde4dd3de.
Cc: stable(a)vger.kernel.org
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu(a)intel.com>
Reviewed-by: Marco Chiappero <marco.chiappero(a)intel.com>
---
drivers/crypto/qat/qat_4xxx/adf_drv.c | 7 -------
drivers/crypto/qat/qat_common/qat_crypto.c | 7 -------
2 files changed, 14 deletions(-)
diff --git a/drivers/crypto/qat/qat_4xxx/adf_drv.c b/drivers/crypto/qat/qat_4xxx/adf_drv.c
index fa4c350c1bf9..a6c78b9c730b 100644
--- a/drivers/crypto/qat/qat_4xxx/adf_drv.c
+++ b/drivers/crypto/qat/qat_4xxx/adf_drv.c
@@ -75,13 +75,6 @@ static int adf_crypto_dev_config(struct adf_accel_dev *accel_dev)
if (ret)
goto err;
- /* Temporarily set the number of crypto instances to zero to avoid
- * registering the crypto algorithms.
- * This will be removed when the algorithms will support the
- * CRYPTO_TFM_REQ_MAY_BACKLOG flag
- */
- instances = 0;
-
for (i = 0; i < instances; i++) {
val = i;
bank = i * 2;
diff --git a/drivers/crypto/qat/qat_common/qat_crypto.c b/drivers/crypto/qat/qat_common/qat_crypto.c
index 80d905ed102e..9341d892533a 100644
--- a/drivers/crypto/qat/qat_common/qat_crypto.c
+++ b/drivers/crypto/qat/qat_common/qat_crypto.c
@@ -161,13 +161,6 @@ int qat_crypto_dev_config(struct adf_accel_dev *accel_dev)
if (ret)
goto err;
- /* Temporarily set the number of crypto instances to zero to avoid
- * registering the crypto algorithms.
- * This will be removed when the algorithms will support the
- * CRYPTO_TFM_REQ_MAY_BACKLOG flag
- */
- instances = 0;
-
for (i = 0; i < instances; i++) {
val = i;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_ASYM_BANK_NUM, i);
--
2.35.1