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authorLinus Torvalds <torvalds@linux-foundation.org>2021-11-01 17:29:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-01 17:29:10 -0700
commitbf953917bed6308daf2b5de49cc1bac58995a33c (patch)
tree1790c50bd33ce5ff083321ef6d6444536de03b32 /fs
parenta5a9e006059e7ac1af3df57d6d7c53e385da5deb (diff)
parentebe4560ed5c8cbfe3759f16c23ca5a6df090c6b5 (diff)
downloadlwn-bf953917bed6308daf2b5de49cc1bac58995a33c.tar.gz
lwn-bf953917bed6308daf2b5de49cc1bac58995a33c.zip
Merge tag 'kspp-misc-fixes-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
Pull hardening fixes and cleanups from Gustavo A. R. Silva: "Various hardening fixes and cleanups that I've been collecting during the last development cycle: Fix -Wcast-function-type error: - firewire: Remove function callback casts (Oscar Carter) Fix application of sizeof operator: - firmware/psci: fix application of sizeof to pointer (jing yangyang) Replace open coded instances with size_t saturating arithmetic helpers: - assoc_array: Avoid open coded arithmetic in allocator arguments (Len Baker) - writeback: prefer struct_size over open coded arithmetic (Len Baker) - aio: Prefer struct_size over open coded arithmetic (Len Baker) - dmaengine: pxa_dma: Prefer struct_size over open coded arithmetic (Len Baker) Flexible array transformation: - KVM: PPC: Replace zero-length array with flexible array member (Len Baker) Use 2-factor argument multiplication form: - nouveau/svm: Use kvcalloc() instead of kvzalloc() (Gustavo A. R. Silva) - xfs: Use kvcalloc() instead of kvzalloc() (Gustavo A. R. Silva)" * tag 'kspp-misc-fixes-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: firewire: Remove function callback casts nouveau/svm: Use kvcalloc() instead of kvzalloc() firmware/psci: fix application of sizeof to pointer dmaengine: pxa_dma: Prefer struct_size over open coded arithmetic KVM: PPC: Replace zero-length array with flexible array member aio: Prefer struct_size over open coded arithmetic writeback: prefer struct_size over open coded arithmetic xfs: Use kvcalloc() instead of kvzalloc() assoc_array: Avoid open coded arithmetic in allocator arguments
Diffstat (limited to 'fs')
-rw-r--r--fs/aio.c3
-rw-r--r--fs/fs-writeback.c6
-rw-r--r--fs/xfs/xfs_ioctl.c6
3 files changed, 7 insertions, 8 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 836dc7e48db7..9c81cf611d65 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -659,8 +659,7 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm)
new_nr = (table ? table->nr : 1) * 4;
spin_unlock(&mm->ioctx_lock);
- table = kzalloc(sizeof(*table) + sizeof(struct kioctx *) *
- new_nr, GFP_KERNEL);
+ table = kzalloc(struct_size(table, table, new_nr), GFP_KERNEL);
if (!table)
return -ENOMEM;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 4124a89a1a5d..67f0e88eed01 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -566,7 +566,7 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id)
if (atomic_read(&isw_nr_in_flight) > WB_FRN_MAX_IN_FLIGHT)
return;
- isw = kzalloc(sizeof(*isw) + 2 * sizeof(struct inode *), GFP_ATOMIC);
+ isw = kzalloc(struct_size(isw, inodes, 2), GFP_ATOMIC);
if (!isw)
return;
@@ -624,8 +624,8 @@ bool cleanup_offline_cgwb(struct bdi_writeback *wb)
int nr;
bool restart = false;
- isw = kzalloc(sizeof(*isw) + WB_MAX_INODES_PER_ISW *
- sizeof(struct inode *), GFP_KERNEL);
+ isw = kzalloc(struct_size(isw, inodes, WB_MAX_INODES_PER_ISW),
+ GFP_KERNEL);
if (!isw)
return restart;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 0c795dc093ef..174cd8950cb6 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -1547,7 +1547,7 @@ xfs_ioc_getbmap(
if (bmx.bmv_count > ULONG_MAX / recsize)
return -ENOMEM;
- buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL);
+ buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -1601,11 +1601,11 @@ xfs_ioc_getfsmap(
*/
count = min_t(unsigned int, head.fmh_count,
131072 / sizeof(struct fsmap));
- recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
+ recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
if (!recs) {
count = min_t(unsigned int, head.fmh_count,
PAGE_SIZE / sizeof(struct fsmap));
- recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL);
+ recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
if (!recs)
return -ENOMEM;
}