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-rw-r--r--fs/aio.c11
-rw-r--r--fs/btrfs/backref.c10
-rw-r--r--fs/cifs/cifsencrypt.c2
-rw-r--r--fs/devpts/inode.c20
-rw-r--r--fs/ext4/resize.c2
-rw-r--r--fs/fuse/file.c2
-rw-r--r--fs/nfs/nfs4proc.c2
-rw-r--r--fs/proc/array.c2
-rw-r--r--fs/proc/base.c20
-rw-r--r--fs/proc/namespaces.c4
-rw-r--r--fs/udf/inode.c15
-rw-r--r--fs/udf/unicode.c21
12 files changed, 84 insertions, 27 deletions
diff --git a/fs/aio.c b/fs/aio.c
index d066c62d9..39de98f25 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -981,12 +981,17 @@ static ssize_t aio_setup_vectored_rw(int rw, struct kiocb *kiocb, bool compat)
static ssize_t aio_setup_single_vector(int rw, struct kiocb *kiocb)
{
- if (unlikely(!access_ok(!rw, kiocb->ki_buf, kiocb->ki_nbytes)))
- return -EFAULT;
+ size_t len = kiocb->ki_nbytes;
+
+ if (len > MAX_RW_COUNT)
+ len = MAX_RW_COUNT;
+
+ if (unlikely(!access_ok(!rw, kiocb->ki_buf, len)))
+ return -EFAULT;
kiocb->ki_iovec = &kiocb->ki_inline_vec;
kiocb->ki_iovec->iov_base = kiocb->ki_buf;
- kiocb->ki_iovec->iov_len = kiocb->ki_nbytes;
+ kiocb->ki_iovec->iov_len = len;
kiocb->ki_nr_segs = 1;
return 0;
}
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index d85f90c92..bca854b44 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1228,7 +1228,8 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
read_extent_buffer(eb, dest + bytes_left,
name_off, name_len);
if (eb != eb_in) {
- btrfs_tree_read_unlock_blocking(eb);
+ if (!path->skip_locking)
+ btrfs_tree_read_unlock_blocking(eb);
free_extent_buffer(eb);
}
ret = inode_ref_info(parent, 0, fs_root, path, &found_key);
@@ -1247,9 +1248,10 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
eb = path->nodes[0];
/* make sure we can use eb after releasing the path */
if (eb != eb_in) {
- atomic_inc(&eb->refs);
- btrfs_tree_read_lock(eb);
- btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+ if (!path->skip_locking)
+ btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+ path->nodes[0] = NULL;
+ path->locks[0] = 0;
}
btrfs_release_path(path);
iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref);
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 5c807b23c..182e82f22 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -591,7 +591,7 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL);
if (!ses->auth_key.response) {
- rc = ENOMEM;
+ rc = -ENOMEM;
ses->auth_key.len = 0;
goto setup_ntlmv2_rsp_ret;
}
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index a726b9f29..61af24e37 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -564,6 +564,26 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx)
mutex_unlock(&allocated_ptys_lock);
}
+/*
+ * pty code needs to hold extra references in case of last /dev/tty close
+ */
+
+void devpts_add_ref(struct inode *ptmx_inode)
+{
+ struct super_block *sb = pts_sb_from_inode(ptmx_inode);
+
+ atomic_inc(&sb->s_active);
+ ihold(ptmx_inode);
+}
+
+void devpts_del_ref(struct inode *ptmx_inode)
+{
+ struct super_block *sb = pts_sb_from_inode(ptmx_inode);
+
+ iput(ptmx_inode);
+ deactivate_super(sb);
+}
+
/**
* devpts_pty_new -- create a new inode in /dev/pts/
* @ptmx_inode: inode of the master
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index fa7d2e668..cf0a70486 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -181,7 +181,7 @@ static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size)
if (flex_gd == NULL)
goto out3;
- if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_flex_group_data))
+ if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_group_data))
goto out2;
flex_gd->count = flexbg_size;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 8556066a7..7149a96f3 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1321,6 +1321,7 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req,
mark_page_accessed(page);
+ iov_iter_advance(ii, tmp);
if (!tmp) {
unlock_page(page);
page_cache_release(page);
@@ -1333,7 +1334,6 @@ static ssize_t fuse_fill_write_pages(struct fuse_req *req,
req->page_descs[req->num_pages].length = tmp;
req->num_pages++;
- iov_iter_advance(ii, tmp);
count += tmp;
pos += tmp;
offset += tmp;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f2b673cf2..c76bcaa56 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1005,6 +1005,7 @@ static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_s
* Protect the call to nfs4_state_set_mode_locked and
* serialise the stateid update
*/
+ spin_lock(&state->owner->so_lock);
write_seqlock(&state->seqlock);
if (deleg_stateid != NULL) {
nfs4_stateid_copy(&state->stateid, deleg_stateid);
@@ -1013,7 +1014,6 @@ static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_s
if (open_stateid != NULL)
nfs_set_open_stateid_locked(state, open_stateid, fmode);
write_sequnlock(&state->seqlock);
- spin_lock(&state->owner->so_lock);
update_open_stateflags(state, fmode);
spin_unlock(&state->owner->so_lock);
}
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 09f0d9c37..5c45eb5e4 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -398,7 +398,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
state = *get_task_state(task);
vsize = eip = esp = 0;
- permitted = ptrace_may_access(task, PTRACE_MODE_READ | PTRACE_MODE_NOAUDIT);
+ permitted = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS | PTRACE_MODE_NOAUDIT);
mm = get_task_mm(task);
if (mm) {
vsize = task_vsize(mm);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index dc4c076f2..069c0eae3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -245,7 +245,7 @@ out:
static int proc_pid_auxv(struct task_struct *task, char *buffer)
{
- struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ);
+ struct mm_struct *mm = mm_access(task, PTRACE_MODE_READ_FSCREDS);
int res = PTR_ERR(mm);
if (mm && !IS_ERR(mm)) {
unsigned int nwords = 0;
@@ -275,7 +275,7 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
wchan = get_wchan(task);
if (lookup_symbol_name(wchan, symname) < 0)
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
return 0;
else
return sprintf(buffer, "%lu", wchan);
@@ -289,7 +289,7 @@ static int lock_trace(struct task_struct *task)
int err = mutex_lock_killable(&task->signal->cred_guard_mutex);
if (err)
return err;
- if (!ptrace_may_access(task, PTRACE_MODE_ATTACH)) {
+ if (!ptrace_may_access(task, PTRACE_MODE_ATTACH_FSCREDS)) {
mutex_unlock(&task->signal->cred_guard_mutex);
return -EPERM;
}
@@ -563,7 +563,7 @@ static int proc_fd_access_allowed(struct inode *inode)
*/
task = get_proc_task(inode);
if (task) {
- allowed = ptrace_may_access(task, PTRACE_MODE_READ);
+ allowed = ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
put_task_struct(task);
}
return allowed;
@@ -598,7 +598,7 @@ static bool has_pid_permissions(struct pid_namespace *pid,
return true;
if (in_group_p(pid->pid_gid))
return true;
- return ptrace_may_access(task, PTRACE_MODE_READ);
+ return ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
}
@@ -713,7 +713,7 @@ static int __mem_open(struct inode *inode, struct file *file, unsigned int mode)
if (!task)
return -ESRCH;
- mm = mm_access(task, mode);
+ mm = mm_access(task, mode | PTRACE_MODE_FSCREDS);
put_task_struct(task);
if (IS_ERR(mm))
@@ -1796,7 +1796,7 @@ static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
if (!task)
goto out_notask;
- mm = mm_access(task, PTRACE_MODE_READ);
+ mm = mm_access(task, PTRACE_MODE_READ_FSCREDS);
if (IS_ERR_OR_NULL(mm))
goto out;
@@ -1931,7 +1931,7 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
goto out;
result = ERR_PTR(-EACCES);
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
goto out_put_task;
result = ERR_PTR(-ENOENT);
@@ -1987,7 +1987,7 @@ proc_map_files_readdir(struct file *filp, void *dirent, filldir_t filldir)
goto out;
ret = -EACCES;
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
goto out_put_task;
ret = 0;
@@ -2523,7 +2523,7 @@ static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
if (result)
return result;
- if (!ptrace_may_access(task, PTRACE_MODE_READ)) {
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) {
result = -EACCES;
goto out_unlock;
}
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 54bdc6701..ac49a8d4a 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -125,7 +125,7 @@ static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
if (!task)
goto out;
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
goto out_put_task;
ns_path.dentry = proc_ns_get_dentry(sb, task, ei->ns.ns_ops);
@@ -158,7 +158,7 @@ static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int bufl
if (!task)
goto out;
- if (!ptrace_may_access(task, PTRACE_MODE_READ))
+ if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
goto out_put_task;
len = -ENOENT;
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 789814f27..5c1120a5f 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -2055,14 +2055,29 @@ void udf_write_aext(struct inode *inode, struct extent_position *epos,
epos->offset += adsize;
}
+/*
+ * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
+ * someone does some weird stuff.
+ */
+#define UDF_MAX_INDIR_EXTS 16
+
int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
{
int8_t etype;
+ unsigned int indirections = 0;
while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
(EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
int block;
+
+ if (++indirections > UDF_MAX_INDIR_EXTS) {
+ udf_err(inode->i_sb,
+ "too many indirect extents in inode %lu\n",
+ inode->i_ino);
+ return -1;
+ }
+
epos->block = *eloc;
epos->offset = sizeof(struct allocExtDesc);
brelse(epos->bh);
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 44b815e57..685fbd8a2 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -132,11 +132,15 @@ int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
if (c < 0x80U)
utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
else if (c < 0x800U) {
+ if (utf_o->u_len > (UDF_NAME_LEN - 4))
+ break;
utf_o->u_name[utf_o->u_len++] =
(uint8_t)(0xc0 | (c >> 6));
utf_o->u_name[utf_o->u_len++] =
(uint8_t)(0x80 | (c & 0x3f));
} else {
+ if (utf_o->u_len > (UDF_NAME_LEN - 5))
+ break;
utf_o->u_name[utf_o->u_len++] =
(uint8_t)(0xe0 | (c >> 12));
utf_o->u_name[utf_o->u_len++] =
@@ -177,17 +181,22 @@ int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length)
{
unsigned c, i, max_val, utf_char;
- int utf_cnt, u_len;
+ int utf_cnt, u_len, u_ch;
memset(ocu, 0, sizeof(dstring) * length);
ocu[0] = 8;
max_val = 0xffU;
+ u_ch = 1;
try_again:
u_len = 0U;
utf_char = 0U;
utf_cnt = 0U;
for (i = 0U; i < utf->u_len; i++) {
+ /* Name didn't fit? */
+ if (u_len + 1 + u_ch >= length)
+ return 0;
+
c = (uint8_t)utf->u_name[i];
/* Complete a multi-byte UTF-8 character */
@@ -229,6 +238,7 @@ try_again:
if (max_val == 0xffU) {
max_val = 0xffffU;
ocu[0] = (uint8_t)0x10U;
+ u_ch = 2;
goto try_again;
}
goto error_out;
@@ -281,7 +291,7 @@ static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o,
c = (c << 8) | ocu[i++];
len = nls->uni2char(c, &utf_o->u_name[utf_o->u_len],
- UDF_NAME_LEN - utf_o->u_len);
+ UDF_NAME_LEN - 2 - utf_o->u_len);
/* Valid character? */
if (len >= 0)
utf_o->u_len += len;
@@ -299,15 +309,19 @@ static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni,
int len;
unsigned i, max_val;
uint16_t uni_char;
- int u_len;
+ int u_len, u_ch;
memset(ocu, 0, sizeof(dstring) * length);
ocu[0] = 8;
max_val = 0xffU;
+ u_ch = 1;
try_again:
u_len = 0U;
for (i = 0U; i < uni->u_len; i++) {
+ /* Name didn't fit? */
+ if (u_len + 1 + u_ch >= length)
+ return 0;
len = nls->char2uni(&uni->u_name[i], uni->u_len - i, &uni_char);
if (!len)
continue;
@@ -320,6 +334,7 @@ try_again:
if (uni_char > max_val) {
max_val = 0xffffU;
ocu[0] = (uint8_t)0x10U;
+ u_ch = 2;
goto try_again;
}
generated by cgit v1.2.3 (git 2.39.1) at 2026-03-14 07:28:06 +0000