[Bug time/29097] New: fchmodat does not handle 64 bit time_t for AT_SYMLINK_NOFOLLOW

[Bug time/29097] New: fchmodat does not handle 64 bit time_t for AT_SYMLINK_NOFOLLOW

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29097

            Bug ID: 29097
           Summary: fchmodat does not handle 64 bit time_t for
                    AT_SYMLINK_NOFOLLOW
           Product: glibc
           Version: 2.34
            Status: NEW
          Severity: normal
          Priority: P2
         Component: time
          Assignee: unassigned at sourceware dot org
          Reporter: adhemerval.zanella at linaro dot org
  Target Milestone: ---

Since Linux fchmodat syscall does not provide a 'flag' argument (to
handle AT_SYMLINK_NOFOLLOW), glibc emulates it through opening a procfs file
descriptor, issuing fstatat to check if it is link (since some kernels and
filesystem it returns in inconsistent results), and then issue chmod.

However, the glibc internal fstat does not use the 64-bit version, which
then results in EOVERFLOW.

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[Bug time/29097] fchmodat does not handle 64 bit time_t for AT_SYMLINK_NOFOLLOW

[P at draigBrady dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29097

Pádraig Brady <P at draigBrady dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |P at draigBrady dot com

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[Bug time/29097] fchmodat does not handle 64 bit time_t for AT_SYMLINK_NOFOLLOW

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29097

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Patch sent upstream for review:
https://patchwork.sourceware.org/project/glibc/patch/20220427165509.2614678-1-adhemerval.zanella@linaro.org/

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[Bug time/29097] fchmodat does not handle 64 bit time_t for AT_SYMLINK_NOFOLLOW

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29097

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |adhemerval.zanella at linaro dot o
                   |                            |rg
   Target Milestone|---                         |2.36
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed on 2.36.

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