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Thomas Gummerer bc6b13a7d2 blame: fix segfault on untracked files 
Since 3b75ee9 ("blame: allow to blame paths freshly added to the index",
2016-07-16) git blame also looks at the index to determine if there is a
file that was freshly added to the index.

cache_name_pos returns -pos - 1 in case there is no match is found, or
if the name matches, but the entry has a stage other than 0.  As git
blame should work for unmerged files, it uses strcmp to determine
whether the name of the returned position matches, in which case the
file exists, but is merely unmerged, or if the file actually doesn't
exist in the index.

If the repository is empty, or if the file would lexicographically be
sorted as the last file in the repository, -cache_name_pos - 1 is
outside of the length of the active_cache array, causing git blame to
segfault.  Guard against that, and die() normally to restore the old
behaviour.

Reported-by: Simon Ruderich <simon@ruderich.org>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-29 11:57:33 -07:00
..
add.c Merge branch 'jc/add-u-A-default-to-top' into maint 2015-11-05 12:18:12 -08:00
am.c Merge branch 'jc/am-i-v-fix' into maint 2016-03-10 11:13:41 -08:00
annotate.c
apply.c builtin/apply: free patch when parse_chunk() fails 2016-04-01 10:21:55 -07:00
archive.c
bisect--helper.c
blame.c blame: fix segfault on untracked files 2016-08-29 11:57:33 -07:00
branch.c Merge branch 'va/i18n-misc-updates' into maint 2016-05-26 13:17:20 -07:00
bundle.c bundle: verify arguments more strictly 2015-05-08 10:52:11 -07:00
cat-file.c cat-file: read batch stream with strbuf_getline() 2016-01-15 10:35:06 -08:00
check-attr.c give "nbuf" strbuf a more meaningful name 2016-02-01 13:43:02 -08:00
check-ignore.c give "nbuf" strbuf a more meaningful name 2016-02-01 13:43:02 -08:00
check-mailmap.c strbuf: introduce strbuf_getline_{lf,nul}() 2016-01-15 10:12:51 -08:00
check-ref-format.c use xmallocz to avoid size arithmetic 2016-02-22 14:51:09 -08:00
checkout-index.c checkout-index: disallow "--no-stage" option 2016-02-01 13:43:49 -08:00
checkout.c Merge branch 'nd/dwim-wildcards-as-pathspecs' into maint 2016-03-10 11:13:39 -08:00
clean.c Merge branch 'jk/tighten-alloc' 2016-02-26 13:37:16 -08:00
clone.c builtin/clone.c: mark strings for translation 2016-02-29 14:27:58 -08:00
column.c column: read lines with strbuf_getline() 2016-01-15 10:35:07 -08:00
commit-tree.c Convert struct object to object_id 2015-11-20 08:02:05 -05:00
commit.c Merge branch 'ad/commit-have-m-option' into maint 2016-05-02 14:24:09 -07:00
config.c Merge branch 'jk/config-get-urlmatch' into maint 2016-04-14 18:57:43 -07:00
count-objects.c prepare_packed_git(): refactor garbage reporting in pack directory 2015-08-17 09:14:59 -07:00
credential.c
describe.c Remove get_object_hash. 2015-11-20 08:02:05 -05:00
diff-files.c diff: run arguments through precompose_argv 2016-05-13 14:35:49 -07:00
diff-index.c diff: run arguments through precompose_argv 2016-05-13 14:35:49 -07:00
diff-tree.c Merge branch 'ar/diff-args-osx-precompose' into maint 2016-06-06 14:27:35 -07:00
diff.c Merge branch 'ar/diff-args-osx-precompose' into maint 2016-06-06 14:27:35 -07:00
fast-export.c convert trivial cases to ALLOC_ARRAY 2016-02-22 14:51:09 -08:00
fetch-pack.c fetch-pack: fix object_id of exact sha1 2016-03-01 11:19:19 -08:00
fetch.c Merge branch 'jk/tighten-alloc' 2016-02-26 13:37:16 -08:00
fmt-merge-msg.c Merge branch 'rs/pop-commit' into maint 2015-12-11 11:14:13 -08:00
for-each-ref.c ref-filter: add option to match literal pattern 2015-09-17 10:02:49 -07:00
fsck.c Remove get_object_hash. 2015-11-20 08:02:05 -05:00
gc.c Merge branch 'dk/gc-idx-wo-pack' into maint 2015-12-04 11:33:08 -08:00
get-tar-commit-id.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
grep.c Merge branch 'jk/tighten-alloc' into maint 2016-03-10 11:13:43 -08:00
hash-object.c Merge branch 'jk/options-cleanup' 2016-02-10 14:20:08 -08:00
help.c convert trivial cases to FLEX_ARRAY macros 2016-02-22 14:51:09 -08:00
index-pack.c Merge branch 'va/i18n-misc-updates' into maint 2016-05-26 13:17:20 -07:00
init-db.c Merge branch 'jk/check-repository-format' into maint 2016-05-02 14:24:04 -07:00
interpret-trailers.c interpret-trailers: add option for in-place editing 2016-01-14 12:22:17 -08:00
log.c format-patch: introduce format.outputDirectory configuration 2016-01-13 10:55:01 -08:00
ls-files.c Merge branch 'jk/options-cleanup' 2016-02-10 14:20:08 -08:00
ls-remote.c ls-remote: add support for showing symrefs 2016-01-19 10:07:56 -08:00
ls-tree.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
mailinfo.c mailinfo: libify 2015-10-21 15:59:34 -07:00
mailsplit.c mailsplit: make PATH_MAX buffers dynamic 2015-09-25 10:18:18 -07:00
merge-base.c convert trivial cases to ALLOC_ARRAY 2016-02-22 14:51:09 -08:00
merge-file.c Merge branch 'jk/merge-file-exit-code' into maint 2015-11-03 15:32:41 -08:00
merge-index.c use sha1_to_hex_r() instead of strcpy 2015-10-05 11:08:05 -07:00
merge-ours.c
merge-recursive.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
merge-tree.c use xmallocz to avoid size arithmetic 2016-02-22 14:51:09 -08:00
merge.c merge: fix NULL pointer dereference when merging nothing into void 2016-03-23 10:12:10 -07:00
mktag.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
mktree.c Merge branch 'jk/tighten-alloc' 2016-02-26 13:37:16 -08:00
mv.c Merge branch 'sb/mv-submodule-fix' into HEAD 2016-05-18 14:40:05 -07:00
name-rev.c Merge branch 'js/name-rev-use-oldest-ref' into maint 2016-05-31 14:08:26 -07:00
notes.c Merge branch 'sb/misc-cleanups' into HEAD 2016-05-18 14:40:15 -07:00
pack-objects.c pack-objects: warn on split packs disabling bitmaps 2016-04-28 09:58:14 -07:00
pack-redundant.c convert trivial cases to ALLOC_ARRAY 2016-02-22 14:51:09 -08:00
pack-refs.c standardize usage info string format 2015-01-14 09:32:04 -08:00
patch-id.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
prune-packed.c standardize usage info string format 2015-01-14 09:32:04 -08:00
prune.c Merge branch 'jk/repository-extension' into maint 2015-11-03 15:32:25 -08:00
pull.c i18n: builtin/pull.c: split strings marked for translation 2016-04-19 12:07:49 -07:00
push.c Merge branch 'mm/push-default-warning' 2016-02-26 13:37:25 -08:00
read-tree.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
receive-pack.c use st_add and st_mult for allocation size computation 2016-02-22 14:51:09 -08:00
reflog.c convert trivial cases to FLEX_ARRAY macros 2016-02-22 14:51:09 -08:00
remote-ext.c typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
remote-fd.c
remote.c i18n: remote: add comment for translators 2016-05-09 12:20:40 -07:00
repack.c strbuf: introduce strbuf_getline_{lf,nul}() 2016-01-15 10:12:51 -08:00
replace.c Merge branch 'js/replace-edit-use-editor-configuration' into maint 2016-05-06 14:53:24 -07:00
rerere.c Sync with 2.6.1 2015-10-05 13:20:08 -07:00
reset.c Remove get_object_hash. 2015-11-20 08:02:05 -05:00
rev-list.c Merge branch 'maint-2.4' into maint-2.5 2016-03-17 11:24:14 -07:00
rev-parse.c Merge branch 'jk/rev-parse-local-env-vars' into maint 2016-04-14 18:57:44 -07:00
revert.c standardize usage info string format 2015-01-14 09:32:04 -08:00
rm.c i18n: builtin/rm.c: remove a comma ',' from string 2016-04-12 10:48:28 -07:00
send-pack.c Merge branch 'sk/send-pack-all-fix' into maint 2016-04-29 14:15:57 -07:00
shortlog.c Merge branch 'jk/shortlog' 2016-01-28 16:10:14 -08:00
show-branch.c Merge branch 'rs/show-branch-argv-array' into maint 2015-12-11 11:14:14 -08:00
show-ref.c show-ref: stop using PARSE_OPT_NO_INTERNAL_HELP 2015-11-20 08:02:07 -05:00
stripspace.c stripspace: call U+0020 a "space" instead of a "blank" 2016-01-29 16:02:34 -08:00
submodule--helper.c Merge branch 'sb/submodule-helper-clone-regression-fix' into maint 2016-05-02 14:24:08 -07:00
symbolic-ref.c symbolic-ref: propagate error code from create_symref() 2015-12-21 12:03:03 -08:00
tag.c tag: do not show ambiguous tag names as "tags/foo" 2016-01-26 13:34:10 -08:00
unpack-file.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
unpack-objects.c Remove get_object_hash. 2015-11-20 08:02:05 -05:00
update-index.c Merge branch 'jk/options-cleanup' 2016-02-10 14:20:08 -08:00
update-ref.c tag, update-ref: improve description of option "create-reflog" 2015-09-11 09:50:02 -07:00
update-server-info.c
upload-archive.c upload-archive: convert sprintf to strbuf 2015-09-25 10:18:18 -07:00
var.c
verify-commit.c verify-commit: add option to print raw gpg status information 2015-06-22 14:20:47 -07:00
verify-pack.c standardize usage info string format 2015-01-14 09:32:04 -08:00
verify-tag.c verify-tag: add option to print raw gpg status information 2015-06-22 14:20:47 -07:00
worktree.c Merge branch 'jk/tighten-alloc' 2016-02-26 13:37:16 -08:00
write-tree.c