| Message ID | 20220522125251.444477-2-ioana.ciornei@nxp.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | dpaa2-eth: software TSO fixes | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Clearly marked for net |
| netdev/fixes_present | success | Fixes tag present in non-next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | success | Link |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/cc_maintainers | success | CCed 6 of 6 maintainers |
| netdev/build_clang | success | Errors and warnings before: 0 this patch: 0 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/verify_fixes | success | Fixes tag looks correct |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/checkpatch | warning | WARNING: line length of 97 exceeds 80 columns |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c index 4b047255d928..766391310d1b 100644 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c @@ -1097,6 +1097,7 @@ static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv, u32 fd_len = dpaa2_fd_get_len(fd); struct dpaa2_sg_entry *sgt; int should_free_skb = 1; + void *tso_hdr; int i; fd_addr = dpaa2_fd_get_addr(fd); @@ -1136,9 +1137,10 @@ static void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv, priv->tx_data_offset); /* Unmap and free the header */ + tso_hdr = dpaa2_iova_to_virt(priv->iommu_domain, dpaa2_sg_get_addr(sgt)); dma_unmap_single(dev, dpaa2_sg_get_addr(sgt), TSO_HEADER_SIZE, DMA_TO_DEVICE); - kfree(dpaa2_iova_to_virt(priv->iommu_domain, dpaa2_sg_get_addr(sgt))); + kfree(tso_hdr); /* Unmap the other SG entries for the data */ for (i = 1; i < swa->tso.num_sg; i++)
The TSO header was DMA unmapped before the virtual address was retrieved and then used to free the buffer. This meant that we were actually removing the DMA map and then trying to search for it to help in retrieving the virtual address. This lead to a invalid virtual address being used in the kfree call. Fix this by calling dpaa2_iova_to_virt() prior to the dma_unmap call. [ 487.231819] Unable to handle kernel paging request at virtual address fffffd9807000008 (...) [ 487.354061] Hardware name: SolidRun LX2160A Honeycomb (DT) [ 487.359535] pstate: a0400005 (NzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 487.366485] pc : kfree+0xac/0x304 [ 487.369799] lr : kfree+0x204/0x304 [ 487.373191] sp : ffff80000c4eb120 [ 487.376493] x29: ffff80000c4eb120 x28: ffff662240c46400 x27: 0000000000000001 [ 487.383621] x26: 0000000000000001 x25: ffff662246da0cc0 x24: ffff66224af78000 [ 487.390748] x23: ffffad184f4ce008 x22: ffffad1850185000 x21: ffffad1838d13cec [ 487.397874] x20: ffff6601c0000000 x19: fffffd9807000000 x18: 0000000000000000 [ 487.405000] x17: ffffb910cdc49000 x16: ffffad184d7d9080 x15: 0000000000004000 [ 487.412126] x14: 0000000000000008 x13: 000000000000ffff x12: 0000000000000000 [ 487.419252] x11: 0000000000000004 x10: 0000000000000001 x9 : ffffad184d7d927c [ 487.426379] x8 : 0000000000000000 x7 : 0000000ffffffd1d x6 : ffff662240a94900 [ 487.433505] x5 : 0000000000000003 x4 : 0000000000000009 x3 : ffffad184f4ce008 [ 487.440632] x2 : ffff662243eec000 x1 : 0000000100000100 x0 : fffffc0000000000 [ 487.447758] Call trace: [ 487.450194] kfree+0xac/0x304 [ 487.453151] dpaa2_eth_free_tx_fd.isra.0+0x33c/0x3e0 [fsl_dpaa2_eth] [ 487.459507] dpaa2_eth_tx_conf+0x100/0x2e0 [fsl_dpaa2_eth] [ 487.464989] dpaa2_eth_poll+0xdc/0x380 [fsl_dpaa2_eth] Fixes: 3dc709e0cd47 ("dpaa2-eth: add support for software TSO") Link: https://bugzilla.kernel.org/show_bug.cgi?id=215886 Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> --- drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)