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archive/zip: fix character device handling in fileModeToUnixMode

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The switch case for fs.ModeDevice can only be reached for block devices
while character devices match fs.ModeDevice | fs.ModeCharDevice. This
would cause character devices to wrongly be reported as regular files.

This bug has existed since the switch was first introduced in CL 5624048.

Change-Id: Icdbedb015e5376b385b3115d2e4574daa052f796
Reviewed-on: https://go-review.googlesource.com/c/go/+/300891
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
This commit is contained in:
Tom Thorogood 2021-03-13 00:27:30 +10:30 committed by Emmanuel Odeke
parent 971c7154b0
commit dac136f87b
2 changed files with 15 additions and 5 deletions
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6
src/archive/zip/struct.go
View File

@ -341,11 +341,9 @@ func fileModeToUnixMode(mode fs.FileMode) uint32 {
case fs.ModeSocket:
m = s_IFSOCK
case fs.ModeDevice:
if mode&fs.ModeCharDevice != 0 {
m = s_IFCHR
} else {
m = s_IFBLK
}
case fs.ModeDevice | fs.ModeCharDevice:
m = s_IFCHR
}
if mode&fs.ModeSetuid != 0 {
m |= s_ISUID

12
src/archive/zip/writer_test.go
View File

@ -57,6 +57,18 @@ var writeTests = []WriteTest{
Method: Deflate,
Mode: 0755 | fs.ModeSymlink,
},
{
Name: "device",
Data: []byte("device file"),
Method: Deflate,
Mode: 0755 | fs.ModeDevice,
},
{
Name: "chardevice",
Data: []byte("char device file"),
Method: Deflate,
Mode: 0755 | fs.ModeDevice | fs.ModeCharDevice,
},
}
func TestWriter(t *testing.T) {