Author: markj
Date: Mon Jul 20 14:28:26 2020
New Revision: 363367
URL: https://svnweb.freebsd.org/changeset/base/363367

Log:
  ext2fs: Stop checking for failures from malloc(M_WAITOK).
  
  PR:           240545
  Submitted by: Andrew Reiter <a...@watson.org>
  Reviewed by:  fsu
  MFC after:    1 week
  Differential Revision:        https://reviews.freebsd.org/D25707

Modified:
  head/sys/fs/ext2fs/ext2_acl.c
  head/sys/fs/ext2fs/ext2_alloc.c
  head/sys/fs/ext2fs/ext2_extents.c
  head/sys/fs/ext2fs/ext2_lookup.c
  head/sys/fs/ext2fs/ext2_vnops.c

Modified: head/sys/fs/ext2fs/ext2_acl.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_acl.c       Mon Jul 20 13:50:10 2020        
(r363366)
+++ head/sys/fs/ext2fs/ext2_acl.c       Mon Jul 20 14:28:26 2020        
(r363367)
@@ -234,8 +234,6 @@ ext2_getacl_posix1e(struct vop_getacl_args *ap)
 
        len = sizeof(*ap->a_aclp) + sizeof(struct ext2_acl_header);
        value = malloc(len, M_ACL, M_WAITOK);
-       if (!value)
-               return (ENOMEM);
 
        error = vn_extattr_get(ap->a_vp, IO_NODELOCKED, attrnamespace, attrname,
            &len, value, ap->a_td);

Modified: head/sys/fs/ext2fs/ext2_alloc.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_alloc.c     Mon Jul 20 13:50:10 2020        
(r363366)
+++ head/sys/fs/ext2fs/ext2_alloc.c     Mon Jul 20 14:28:26 2020        
(r363367)
@@ -425,9 +425,6 @@ ext2_valloc(struct vnode *pvp, int mode, struct ucred 
        }
 
        ip = malloc(sizeof(struct inode), M_EXT2NODE, M_WAITOK | M_ZERO);
-       if (ip == NULL) {
-               return (ENOMEM);
-       }
 
        /* Allocate a new vnode/inode. */
        if ((error = getnewvnode("ext2fs", ump->um_mountp, &ext2_vnodeops, 
&vp)) != 0) {

Modified: head/sys/fs/ext2fs/ext2_extents.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_extents.c   Mon Jul 20 13:50:10 2020        
(r363366)
+++ head/sys/fs/ext2fs/ext2_extents.c   Mon Jul 20 14:28:26 2020        
(r363367)
@@ -322,9 +322,6 @@ ext4_ext_fill_path_bdata(struct ext4_extent_path *path
            ("ext4_ext_fill_path_bdata: bad ep_data"));
 
        path->ep_data = malloc(bp->b_bufsize, M_EXT2EXTENTS, M_WAITOK);
-       if (!path->ep_data)
-               return (ENOMEM);
-
        memcpy(path->ep_data, bp->b_data, bp->b_bufsize);
        path->ep_blk = blk;
 
@@ -397,9 +394,6 @@ ext4_ext_find_extent(struct inode *ip, daddr_t block,
                path = malloc(EXT4_EXT_DEPTH_MAX *
                    sizeof(struct ext4_extent_path),
                    M_EXT2EXTENTS, M_WAITOK | M_ZERO);
-               if (!path)
-                       return (ENOMEM);
-
                *ppath = path;
                alloc = 1;
        }
@@ -762,8 +756,6 @@ ext4_ext_split(struct inode *ip, struct ext4_extent_pa
        /* Allocate new blocks. */
        ablks = malloc(sizeof(e4fs_daddr_t) * depth,
            M_EXT2EXTENTS, M_WAITOK | M_ZERO);
-       if (!ablks)
-               return (ENOMEM);
        for (a = 0; a < depth - at; a++) {
                newblk = ext4_ext_alloc_meta(ip);
                if (newblk == 0)
@@ -1517,9 +1509,6 @@ ext4_ext_remove_space(struct inode *ip, off_t length, 
 
        path = malloc(sizeof(struct ext4_extent_path) * (depth + 1),
            M_EXT2EXTENTS, M_WAITOK | M_ZERO);
-       if (!path)
-               return (ENOMEM);
-
        path[0].ep_header = ehp;
        path[0].ep_depth = depth;
        i = 0;

Modified: head/sys/fs/ext2fs/ext2_lookup.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_lookup.c    Mon Jul 20 13:50:10 2020        
(r363366)
+++ head/sys/fs/ext2fs/ext2_lookup.c    Mon Jul 20 14:28:26 2020        
(r363367)
@@ -894,10 +894,6 @@ ext2_add_first_entry(struct vnode *dvp, struct ext2fs_
                entry->e2d_reclen = htole16(dirblksize -
                    sizeof(struct ext2fs_direct_tail));
                buf = malloc(dirblksize, M_TEMP, M_WAITOK);
-               if (!buf) {
-                       error = ENOMEM;
-                       goto out;
-               }
                memcpy(buf, entry, EXT2_DIR_REC_LEN(entry->e2d_namlen));
                ext2_init_dirent_tail(EXT2_DIRENT_TAIL(buf, dirblksize));
                ext2_dirent_csum_set(dp, (struct ext2fs_direct_2 *)buf);

Modified: head/sys/fs/ext2fs/ext2_vnops.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_vnops.c     Mon Jul 20 13:50:10 2020        
(r363366)
+++ head/sys/fs/ext2fs/ext2_vnops.c     Mon Jul 20 14:28:26 2020        
(r363367)
@@ -1077,10 +1077,6 @@ abortit:
                        ext2_dec_nlink(dp);
                        dp->i_flag |= IN_CHANGE;
                        dirbuf = malloc(dp->i_e2fs->e2fs_bsize, M_TEMP, 
M_WAITOK | M_ZERO);
-                       if (!dirbuf) {
-                               error = ENOMEM;
-                               goto bad;
-                       }
                        error = vn_rdwr(UIO_READ, fvp, (caddr_t)dirbuf,
                            ip->i_e2fs->e2fs_bsize, (off_t)0,
                            UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK,
@@ -1390,12 +1386,6 @@ ext2_mkdir(struct vop_mkdir_args *ap)
 #define DIRBLKSIZ  VTOI(dvp)->i_e2fs->e2fs_bsize
        dirtemplate.dotdot_reclen = htole16(DIRBLKSIZ - 12);
        buf = malloc(DIRBLKSIZ, M_TEMP, M_WAITOK | M_ZERO);
-       if (!buf) {
-               error = ENOMEM;
-               ext2_dec_nlink(dp);
-               dp->i_flag |= IN_CHANGE;
-               goto bad;
-       }
        if (EXT2_HAS_RO_COMPAT_FEATURE(fs, EXT2F_ROCOMPAT_METADATA_CKSUM)) {
                dirtemplate.dotdot_reclen =
                    htole16(le16toh(dirtemplate.dotdot_reclen) -
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