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Date: Sun, 23 Jul 2017 00:50:32 -0400 From: Theodore Ts'o <tytso@....edu> To: Ext4 Developers List <linux-ext4@...r.kernel.org> Cc: abuchbinder@...gle.com, Theodore Ts'o <tytso@....edu> Subject: [PATCH 2/5] e2fsck: don't restart after a critical metadata collision in e2fsck -n mode If the file system isn't going to be changed, there's no point restarting; it will just cause e2fsck to loop forever. This problem was found using American Fuzzy Lop. Reported-by: Adam Buchbinder <abuchbinder@...gle.com> Signed-off-by: Theodore Ts'o <tytso@....edu> --- e2fsck/pass1.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c index c358eec0f..8044beed6 100644 --- a/e2fsck/pass1.c +++ b/e2fsck/pass1.c @@ -2718,7 +2718,8 @@ report_problem: fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx); - ctx->flags |= E2F_FLAG_RESTART_LATER; + if ((ctx->options & E2F_OPT_NO) == 0) + ctx->flags |= E2F_FLAG_RESTART_LATER; } pctx->errcode = ext2fs_extent_get(ehandle, EXT2_EXTENT_DOWN, &extent); @@ -3453,7 +3454,8 @@ static int process_block(ext2_filsys fs, ext2fs_test_block_bitmap2(ctx->block_metadata_map, blk)) { pctx->blk = blk; fix_problem(ctx, PR_1_CRITICAL_METADATA_COLLISION, pctx); - ctx->flags |= E2F_FLAG_RESTART_LATER; + if ((ctx->options & E2F_OPT_NO) == 0) + ctx->flags |= E2F_FLAG_RESTART_LATER; } if (problem) { -- 2.11.0.rc0.7.gbe5a750
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