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commit 4b59352edb5ce783ba578d708de1fda981acfec6
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Author: Frank Sorenson <fsorenso@redhat.com>
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Date: Fri Jul 4 15:31:50 2014 -0400
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mke2fs: prevent creation of filesystem with unsupported revision
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It's a bit strange to accept revision levels higher than
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the code creating the filesystem can understand, so don't
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allow it.
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At least the kernel will mount the fs readonly if it's too
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high, but no other utility will touch it, so you can't
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fix the error.
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Just reject anything > EXT2_MAX_SUPP_REV at mkfs time.
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Signed-off-by: Frank Sorenson <fsorenso@redhat.com>
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[sandeen@redhat.com: Add more verbose commit log]
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Signed-off-by: Eric Sandeen <sandeen@redhat.com>
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Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Index: e2fsprogs-1.42.9/misc/mke2fs.c
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===================================================================
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--- e2fsprogs-1.42.9.orig/misc/mke2fs.c
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+++ e2fsprogs-1.42.9/misc/mke2fs.c
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@@ -1570,6 +1570,11 @@ profile_error:
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_("bad revision level - %s"), optarg);
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exit(1);
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}
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+ if (r_opt > EXT2_MAX_SUPP_REV) {
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+ com_err(program_name, EXT2_ET_REV_TOO_HIGH,
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+ _("while trying to create revision %d"), r_opt);
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+ exit(1);
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+ }
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fs_param.s_rev_level = r_opt;
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break;
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case 's': /* deprecated */
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