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  1. RHEL
  2. RHEL-1915

glibc: iconv tool does not support in-place conversion of files

Linking RHIVOS CVEs to...Migration: Automation ...SWIFT: POC ConversionSync from "Extern...XMLWordPrintable

    • glibc-2.34-143.el9
    • None
    • Moderate
    • Hide
      422ed8ede312f786369e4850e47b8d32beaae4e4
      0cb64617a6f691b611406427c8e24b7f04c4983f
      00ba299787c2ea9e5c4986301e2f4965dffbfded
      6cbf845fcdc76131d0e674cee454fe738b69c69d
      8ef3cff9d1ceafe369f982d980678d749fb93bd2
      75819cdd29a193cc2db980878bec305905b22bbc
      fa1b0d5e9f6e0353e16339430770a7a8824c0468
      079ebf7624e7fd0ad7fe94a7176a2e132c996d86
      Show
      422ed8ede312f786369e4850e47b8d32beaae4e4 0cb64617a6f691b611406427c8e24b7f04c4983f 00ba299787c2ea9e5c4986301e2f4965dffbfded 6cbf845fcdc76131d0e674cee454fe738b69c69d 8ef3cff9d1ceafe369f982d980678d749fb93bd2 75819cdd29a193cc2db980878bec305905b22bbc fa1b0d5e9f6e0353e16339430770a7a8824c0468 079ebf7624e7fd0ad7fe94a7176a2e132c996d86
    • 4
    • rhel-pt-c-libs
    • ssg_platform_tools
    • 3
    • False
    • False
    • Yes
    • Red Hat Enterprise Linux
    • SST PT Libraries Sprint 11, SST PT Libraries Sprint 13, SST PT Libraries Sprint 14, SST PT Libraries Sprint 15
    • Bug Fix
    • Hide
      .`iconv` in-place conversions no longer result in corrupted output

      The `iconv` utility can write the converted output to the same file. Previously, when you performed an in-place conversion and the source file exceeded a certain size, `iconv` overwrite the file before the processing was completed. Consequently, the file was corrupted. With this update, the utility creates a temporary file if the source and the output file are the same and overrides the source file after the conversion is complete. As a result, in-place conversions can no longer result in corrupted files.
      Show
      .`iconv` in-place conversions no longer result in corrupted output The `iconv` utility can write the converted output to the same file. Previously, when you performed an in-place conversion and the source file exceeded a certain size, `iconv` overwrite the file before the processing was completed. Consequently, the file was corrupted. With this update, the utility creates a temporary file if the source and the output file are the same and overrides the source file after the conversion is complete. As a result, in-place conversions can no longer result in corrupted files.
    • Done
    • x86_64
    • None

      What were you trying to do that didn't work?

      Convert a file from ISO-8859-1 to UTF-8 

      Please provide the package NVR for which bug is seen:

      glibc-common-2.34-60.el9.x86_64

      How reproducible:

      in house and by customer

      Steps to reproduce

      Test environment:
      Release:          Red Hat Enterprise Linux release 9.2 (Plow)
      Kernel:           5.14.0-284.25.1.el9_2.x86_64
      IP Address:       10.1.183.219
      glibc-common:     glibc-common-2.34-60.el9.x86_64
      locale:           en.US.ISO-8859-1

      Below 32K:

      [root@test ~]# tr -dc '[:alnum:] \n' </dev/urandom | head -c 31000 > test.txt ; stat -c '%s' test.txt ; iconv -f ISO-8859-1 -t UTF-8 test.txt -o test.txt ; stat -c '%s' test.txt
      31000
      48258

      32K and above:

      [root@test ~]# tr -dc '[:alnum:] \n' </dev/urandom | head -c 32000 > test.txt ; stat -c '%s' test.txt ; iconv -f ISO-8859-1 -t UTF-8 test.txt -o test.txt ; stat -c '%s' test.txt
      32000
      49800
      [root@test ~]# tr -dc '[:alnum:] \n' </dev/urandom | head -c 32001 > test.txt ; stat -c '%s' test.txt ; iconv -f ISO-8859-1 -t UTF-8 test.txt -o test.txt ; stat -c '%s' test.txt
      32001
      50012
      [root@test ~]# tr -dc '[:alnum:] \n' </dev/urandom | head -c 32002 > test.txt ; stat -c '%s' test.txt ; iconv -f ISO-8859-1 -t UTF-8 test.txt -o test.txt ; stat -c '%s' test.txt
      32002
      49938
      [root@test ~]# tr -dc '[:alnum:] \n' </dev/urandom | head -c 32003 > test.txt ; stat -c '%s' test.txt ; iconv -f ISO-8859-1 -t UTF-8 test.txt -o test.txt ; stat -c '%s' test.txt
      32003
      Bus error (core dumped)
      28672

      Expected results

      File is converted

      Actual results

      core dump

              skolosov@redhat.com Sergey Kolosov
              rhn-support-jwright Joe Wright
              Florian Weimer, Murali Prudhvi Dhar Rao Ijjapureddi
              Patsy Griffin Patsy Griffin
              Sergey Kolosov Sergey Kolosov
              Marc Muehlfeld Marc Muehlfeld
              Votes:
              1 Vote for this issue
              Watchers:
              13 Start watching this issue

                Created:
                Updated:
                Resolved: