4.19-stable patches

added patches:
	ftruncate-pass-a-signed-offset.patch

diff --git a/queue-4.19/ftruncate-pass-a-signed-offset.patch b/queue-4.19/ftruncate-pass-a-signed-offset.patch
new file mode 100644 (file)
index 0000000..548295c
--- /dev/null
+++ b/queue-4.19/ftruncate-pass-a-signed-offset.patch
@@ -0,0 +1,72 @@
+From 4b8e88e563b5f666446d002ad0dc1e6e8e7102b0 Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Wed, 19 Jun 2024 11:34:09 +0200
+Subject: ftruncate: pass a signed offset
+
+From: Arnd Bergmann <arnd@arndb.de>
+
+commit 4b8e88e563b5f666446d002ad0dc1e6e8e7102b0 upstream.
+
+The old ftruncate() syscall, using the 32-bit off_t misses a sign
+extension when called in compat mode on 64-bit architectures.  As a
+result, passing a negative length accidentally succeeds in truncating
+to file size between 2GiB and 4GiB.
+
+Changing the type of the compat syscall to the signed compat_off_t
+changes the behavior so it instead returns -EINVAL.
+
+The native entry point, the truncate() syscall and the corresponding
+loff_t based variants are all correct already and do not suffer
+from this mistake.
+
+Fixes: 3f6d078d4acc ("fix compat truncate/ftruncate")
+Reviewed-by: Christian Brauner <brauner@kernel.org>
+Cc: stable@vger.kernel.org
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ fs/open.c                |    4 ++--
+ include/linux/compat.h   |    2 +-
+ include/linux/syscalls.h |    2 +-
+ 3 files changed, 4 insertions(+), 4 deletions(-)
+
+--- a/fs/open.c
++++ b/fs/open.c
+@@ -199,13 +199,13 @@ out:
+       return error;
+ }
+ 
+-SYSCALL_DEFINE2(ftruncate, unsigned int, fd, unsigned long, length)
++SYSCALL_DEFINE2(ftruncate, unsigned int, fd, off_t, length)
+ {
+       return do_sys_ftruncate(fd, length, 1);
+ }
+ 
+ #ifdef CONFIG_COMPAT
+-COMPAT_SYSCALL_DEFINE2(ftruncate, unsigned int, fd, compat_ulong_t, length)
++COMPAT_SYSCALL_DEFINE2(ftruncate, unsigned int, fd, compat_off_t, length)
+ {
+       return do_sys_ftruncate(fd, length, 1);
+ }
+--- a/include/linux/compat.h
++++ b/include/linux/compat.h
+@@ -598,7 +598,7 @@ asmlinkage long compat_sys_fstatfs(unsig
+ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
+                                    struct compat_statfs64 __user *buf);
+ asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
+-asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
++asmlinkage long compat_sys_ftruncate(unsigned int, compat_off_t);
+ /* No generic prototype for truncate64, ftruncate64, fallocate */
+ asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
+                                 int flags, umode_t mode);
+--- a/include/linux/syscalls.h
++++ b/include/linux/syscalls.h
+@@ -404,7 +404,7 @@ asmlinkage long sys_fstatfs(unsigned int
+ asmlinkage long sys_fstatfs64(unsigned int fd, size_t sz,
+                               struct statfs64 __user *buf);
+ asmlinkage long sys_truncate(const char __user *path, long length);
+-asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length);
++asmlinkage long sys_ftruncate(unsigned int fd, off_t length);
+ #if BITS_PER_LONG == 32
+ asmlinkage long sys_truncate64(const char __user *path, loff_t length);
+ asmlinkage long sys_ftruncate64(unsigned int fd, loff_t length);

diff --git a/queue-4.19/series b/queue-4.19/series
index ea593dab6d8145662e20e091b3fd51ee5c343241..581d09ef15c618f537be629fc0c650aed22f8fee 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -143,3 +143,4 @@ drm-nouveau-dispnv04-fix-null-pointer-dereference-in-nv17_tv_get_ld_modes.patch
 drm-nouveau-dispnv04-fix-null-pointer-dereference-in-nv17_tv_get_hd_modes.patch
 batman-adv-don-t-accept-tt-entries-for-out-of-spec-vids.patch
 ata-libata-core-fix-double-free-on-error.patch
+ftruncate-pass-a-signed-offset.patch