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dispatch: protect against malicious 'hg serve --stdio' invocations (sec)...
dispatch: protect against malicious 'hg serve --stdio' invocations (sec) Some shared-ssh installations assume that 'hg serve --stdio' is a safe command to run for minimally trusted users. Unfortunately, the messy implementation of argument parsing here meant that trying to access a repo named '--debugger' would give the user a pdb prompt, thereby sidestepping any hoped-for sandboxing. Serving repositories over HTTP(S) is unaffected. We're not currently hardening any subcommands other than 'serve'. If your service exposes other commands to users with arbitrary repository names, it is imperative that you defend against repository names of '--debugger' and anything starting with '--config'. The read-only mode of hg-ssh stopped working because it provided its hook configuration to "hg serve --stdio" via --config parameter. This is banned for security reasons now. This patch switches it to directly call ui.setconfig(). If your custom hosting infrastructure relies on passing --config to "hg serve --stdio", you'll need to find a different way to get that configuration into Mercurial, either by using ui.setconfig() as hg-ssh does in this patch, or by placing an hgrc file someplace where Mercurial will read it. mitrandir@fb.com provided some extra fixes for the dispatch code and for hg-ssh in places that I overlooked.
Ryan McElroy - - Load All Authors

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r31729:c069c4e2 default
r32050:77eaf953 4.1.3 stable
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test-rebase-base.t
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$ cat >> $HGRCPATH <<EOF
> [extensions]
> rebase=
> drawdag=$TESTDIR/drawdag.py
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: {desc}"
> EOF
$ rebasewithdag() {
> N=`$PYTHON -c "print($N+1)"`
> hg init repo$N && cd repo$N
> hg debugdrawdag
> hg rebase "$@" > _rebasetmp
> r=$?
> grep -v 'saved backup bundle' _rebasetmp
> [ $r -eq 0 ] && hg tglog
> cd ..
> return $r
> }
Single branching point, without merge:
$ rebasewithdag -b D -d Z <<'EOS'
> D E
> |/
> Z B C # C: branching point, E should be picked
> \|/ # B should not be picked
> A
> |
> R
> EOS
rebasing 3:d6003a550c2c "C" (C)
rebasing 5:4526cf523425 "D" (D)
rebasing 6:b296604d9846 "E" (E tip)
o 6: E
|
| o 5: D
|/
o 4: C
|
o 3: Z
|
| o 2: B
|/
o 1: A
|
o 0: R
Multiple branching points caused by selecting a single merge changeset:
$ rebasewithdag -b E -d Z <<'EOS'
> E
> /|
> B C D # B, C: multiple branching points
> | |/ # D should not be picked
> Z | /
> \|/
> A
> |
> R
> EOS
rebasing 2:c1e6b162678d "B" (B)
rebasing 3:d6003a550c2c "C" (C)
rebasing 6:5251e0cb7302 "E" (E tip)
o 6: E
|\
| o 5: C
| |
o | 4: B
|/
o 3: Z
|
| o 2: D
|/
o 1: A
|
o 0: R
Rebase should not extend the "--base" revset using "descendants":
$ rebasewithdag -b B -d Z <<'EOS'
> E
> /|
> Z B C # descendants(B) = B+E. With E, C will be included incorrectly
> \|/
> A
> |
> R
> EOS
rebasing 2:c1e6b162678d "B" (B)
rebasing 5:5251e0cb7302 "E" (E tip)
o 5: E
|\
| o 4: B
| |
| o 3: Z
| |
o | 2: C
|/
o 1: A
|
o 0: R
Rebase should not simplify the "--base" revset using "roots":
$ rebasewithdag -b B+E -d Z <<'EOS'
> E
> /|
> Z B C # roots(B+E) = B. Without E, C will be missed incorrectly
> \|/
> A
> |
> R
> EOS
rebasing 2:c1e6b162678d "B" (B)
rebasing 3:d6003a550c2c "C" (C)
rebasing 5:5251e0cb7302 "E" (E tip)
o 5: E
|\
| o 4: C
| |
o | 3: B
|/
o 2: Z
|
o 1: A
|
o 0: R
The destination is one of the two branching points of a merge:
$ rebasewithdag -b F -d Z <<'EOS'
> F
> / \
> E D
> / /
> Z C
> \ /
> B
> |
> A
> EOS
nothing to rebase
[1]
Multiple branching points caused by multiple bases (issue5420):
$ rebasewithdag -b E1+E2+C2+B1 -d Z <<'EOS'
> Z E2
> | /
> F E1 C2
> |/ /
> E C1 B2
> |/ /
> C B1
> |/
> B
> |
> A
> |
> R
> EOS
rebasing 3:a113dbaa660a "B1" (B1)
rebasing 5:06ce7b1cc8c2 "B2" (B2)
rebasing 6:0ac98cce32d3 "C1" (C1)
rebasing 8:781512f5e33d "C2" (C2)
rebasing 9:428d8c18f641 "E1" (E1)
rebasing 11:e1bf82f6b6df "E2" (E2)
o 12: E2
|
o 11: E1
|
| o 10: C2
| |
| o 9: C1
|/
| o 8: B2
| |
| o 7: B1
|/
o 6: Z
|
o 5: F
|
o 4: E
|
o 3: C
|
o 2: B
|
o 1: A
|
o 0: R
Multiple branching points with multiple merges:
$ rebasewithdag -b G+P -d Z <<'EOS'
> G H P
> |\ /| |\
> F E D M N
> \|/| /| |\
> Z C B I J K L
> \|/ |/ |/
> A A A
> EOS
rebasing 2:dc0947a82db8 "C" (C)
rebasing 8:215e7b0814e1 "D" (D)
rebasing 9:03ca77807e91 "E" (E)
rebasing 10:afc707c82df0 "F" (F)
rebasing 13:018caa673317 "G" (G)
rebasing 14:4f710fbd68cb "H" (H)
rebasing 3:08ebfeb61bac "I" (I)
rebasing 4:a0a5005cec67 "J" (J)
rebasing 5:83780307a7e8 "K" (K)
rebasing 6:e131637a1cb6 "L" (L)
rebasing 11:d6fe3d11d95d "M" (M)
rebasing 12:fa1e02269063 "N" (N)
rebasing 15:448b1a498430 "P" (P tip)
o 15: P
|\
| o 14: N
| |\
o \ \ 13: M
|\ \ \
| | | o 12: L
| | | |
| | o | 11: K
| | |/
| o / 10: J
| |/
o / 9: I
|/
| o 8: H
| |\
| | | o 7: G
| | |/|
| | | o 6: F
| | | |
| | o | 5: E
| | |/
| o | 4: D
| |\|
+---o 3: C
| |
o | 2: Z
| |
| o 1: B
|/
o 0: A
Slightly more complex merge case (mentioned in https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-November/091074.html):
$ rebasewithdag -b A3+B3 -d Z <<'EOF'
> Z C1 A3 B3
> | / / \ / \
> M3 C0 A1 A2 B1 B2
> | / | | | |
> M2 M1 C1 C1 M3
> |
> M1
> |
> M0
> EOF
rebasing 4:8817fae53c94 "C0" (C0)
rebasing 6:06ca5dfe3b5b "B2" (B2)
rebasing 7:73508237b032 "C1" (C1)
rebasing 9:fdb955e2faed "A2" (A2)
rebasing 11:1b2f368c3cb5 "A3" (A3)
rebasing 10:0a33b0519128 "B1" (B1)
rebasing 12:bd6a37b5b67a "B3" (B3 tip)
o 12: B3
|\
| o 11: B1
| |
| | o 10: A3
| | |\
| +---o 9: A2
| | |
| o | 8: C1
| | |
o | | 7: B2
| | |
| o | 6: C0
|/ /
o | 5: Z
| |
o | 4: M3
| |
o | 3: M2
| |
| o 2: A1
|/
o 1: M1
|
o 0: M0
Mixed rebasable and non-rebasable bases (unresolved, issue5422):
$ rebasewithdag -b C+D -d B <<'EOS'
> D
> /
> B C
> |/
> A
> EOS
nothing to rebase
[1]
Disconnected graph:
$ rebasewithdag -b B -d Z <<'EOS'
> B
> |
> Z A
> EOS
nothing to rebase from 112478962961 to 48b9aae0607f
[1]
Multiple roots. Roots are ancestors of dest:
$ rebasewithdag -b B+D -d Z <<'EOF'
> D Z B
> \|\|
> C A
> EOF
rebasing 2:112478962961 "B" (B)
rebasing 3:b70f76719894 "D" (D)
o 4: D
|
| o 3: B
|/
o 2: Z
|\
| o 1: C
|
o 0: A
Multiple roots. One root is not an ancestor of dest:
$ rebasewithdag -b B+D -d Z <<'EOF'
> Z B D
> \|\|
> A C
> EOF
nothing to rebase from 86d01f49c0d9+b70f76719894 to 262e37e34f63
[1]
Multiple roots. One root is not an ancestor of dest. Select using a merge:
$ rebasewithdag -b E -d Z <<'EOF'
> E
> |\
> Z B D
> \|\|
> A C
> EOF
rebasing 2:86d01f49c0d9 "B" (B)
rebasing 5:539a0ff83ea9 "E" (E tip)
o 5: E
|\
| o 4: B
| |\
| | o 3: Z
| | |
o | | 2: D
|/ /
o / 1: C
/
o 0: A
Multiple roots. Two children share two parents while dest has only one parent:
$ rebasewithdag -b B+D -d Z <<'EOF'
> Z B D
> \|\|\
> A C A
> EOF
rebasing 2:86d01f49c0d9 "B" (B)
rebasing 3:b7df2ca01aa8 "D" (D)
o 4: D
|\
+---o 3: B
| |/
| o 2: Z
| |
o | 1: C
/
o 0: A