svn commit: r345270 - stable/12/sys/fs/ext2fs

[Fedor Uporov]

Author: fsu
Date: Mon Mar 18 12:26:25 2019
New Revision: 345270
URL: https://svnweb.freebsd.org/changeset/base/345270

Log:
  MFC: r344754:
  Do not panic if inode bitmap is corrupted.
  
  admbug:         804
  Reported by:    Ilja Van Sprundel
  Reviewed by:    pfg
  
  Differential Revision:    https://reviews.freebsd.org/D19325

Modified:
  stable/12/sys/fs/ext2fs/ext2_alloc.c

Modified: stable/12/sys/fs/ext2fs/ext2_alloc.c
==============================================================================
--- stable/12/sys/fs/ext2fs/ext2_alloc.c	Mon Mar 18 12:22:23 2019	(r345269)
+++ stable/12/sys/fs/ext2fs/ext2_alloc.c	Mon Mar 18 12:26:25 2019	(r345270)
@@ -1350,10 +1350,12 @@ ext2_nodealloccg(struct inode *ip, int cg, daddr_t ipr
 		start = 0;
 		loc = memcchr(&ibp[start], 0xff, len);
 		if (loc == NULL) {
-			printf("cg = %d, ipref = %lld, fs = %s\n",
+			printf("ext2fs: inode bitmap corrupted: "
+			    "cg = %d, ipref = %lld, fs = %s - run fsck\n",
 			    cg, (long long)ipref, fs->e2fs_fsmnt);
-			panic("ext2fs_nodealloccg: map corrupted");
-			/* NOTREACHED */
+			brelse(bp);
+			EXT2_LOCK(ump);
+			return (0);
 		}
 	}
 	ipref = (loc - ibp) * NBBY + ffs(~*loc) - 1;