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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-04-23 08:53:44 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2013-04-23 08:59:35 +0200 |
| commit | 5c95f7b66be2e59cf26f3c29cfab7657880bd76d (patch) | |
| tree | 102b46e4384a94e8acca138f920d95230775f12c /sysdeps/unix | |
| parent | d34c915826734cf20b189e925aac9b9f176bcd53 (diff) | |
| download | glibc-5c95f7b66be2e59cf26f3c29cfab7657880bd76d.zip glibc-5c95f7b66be2e59cf26f3c29cfab7657880bd76d.tar.gz glibc-5c95f7b66be2e59cf26f3c29cfab7657880bd76d.tar.bz2 | |
S/390: Change struct statfs[64] member types to unsigned values
Kay Sievers reported that coreutils' stat tool has a problem with
s390's statfs[64] definition:
> The definition of struct statfs::f_type needs a fix. s390 is the only
> architecture in the kernel that uses an int and expects magic
> constants lager than INT_MAX to fit into.
>
> A fix is needed to make Fedora boot on s390, it currently fails to do
> so. Userspace does not want to add code to paper-over this issue.
[...]
> Even coreutils cannot handle it:
> #define RAMFS_MAGIC 0x858458f6
> # stat -f -c%t /
> ffffffff858458f6
>
> #define BTRFS_SUPER_MAGIC 0x9123683E
> # stat -f -c%t /mnt
> ffffffff9123683e
The bug is caused by an implicit sign extension within the stat tool:
out_uint_x (pformat, prefix_len, statfsbuf->f_type);
where the format finally will be "%lx".
A similar problem can be found in the 'tail' tool.
s390 is the only architecture which has an int type f_type member in
struct statfs[64]. Other architectures have either unsigned ints or
long values, so that the problem doesn't occur there.
Therefore change the type of the f_type member to unsigned int, so
that we get zero extension instead sign extension when assignment to
a long value happens.
Reported-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/s390/bits/statfs.h | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/bits/statfs.h b/sysdeps/unix/sysv/linux/s390/bits/statfs.h index ff54607..91dde15 100644 --- a/sysdeps/unix/sysv/linux/s390/bits/statfs.h +++ b/sysdeps/unix/sysv/linux/s390/bits/statfs.h @@ -23,8 +23,8 @@ struct statfs { - int f_type; - int f_bsize; + unsigned int f_type; + unsigned int f_bsize; #ifndef __USE_FILE_OFFSET64 __fsblkcnt_t f_blocks; __fsblkcnt_t f_bfree; @@ -39,27 +39,27 @@ struct statfs __fsfilcnt64_t f_ffree; #endif __fsid_t f_fsid; - int f_namelen; - int f_frsize; - int f_flags; - int f_spare[4]; + unsigned int f_namelen; + unsigned int f_frsize; + unsigned int f_flags; + unsigned int f_spare[4]; }; #ifdef __USE_LARGEFILE64 struct statfs64 { - int f_type; - int f_bsize; + unsigned int f_type; + unsigned int f_bsize; __fsblkcnt64_t f_blocks; __fsblkcnt64_t f_bfree; __fsblkcnt64_t f_bavail; __fsfilcnt64_t f_files; __fsfilcnt64_t f_ffree; __fsid_t f_fsid; - int f_namelen; - int f_frsize; - int f_flags; - int f_spare[4]; + unsigned int f_namelen; + unsigned int f_frsize; + unsigned int f_flags; + unsigned int f_spare[4]; }; #endif |