Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

exfat: fix remount failure in different process environments 

The kernel test robot reported that the exFAT remount operation
failed. The reason for the failure was that the process's umask
is different between mount and remount, causing fs_fmask and
fs_dmask are changed.

Potentially, both gid and uid may also be changed. Therefore, when
initializing fs_context for remount, inherit these mount options
from the options used during mount.

Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202511251637.81670f5c-lkp@intel.com
Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Yuezhang Mo 2025-11-28 17:51:10 +08:00 committed by Namjae Jeon
parent d70a5804c5
commit 51fc7b4ce1
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
fs/exfat/super.c
View File

@ -824,10 +824,21 @@ static int exfat_init_fs_context(struct fs_context *fc)
ratelimit_state_init(&sbi->ratelimit, DEFAULT_RATELIMIT_INTERVAL,
DEFAULT_RATELIMIT_BURST);
sbi->options.fs_uid = current_uid();
sbi->options.fs_gid = current_gid();
sbi->options.fs_fmask = current->fs->umask;
sbi->options.fs_dmask = current->fs->umask;
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE && fc->root) {
struct super_block *sb = fc->root->d_sb;
struct exfat_mount_options *cur_opts = &EXFAT_SB(sb)->options;
sbi->options.fs_uid = cur_opts->fs_uid;
sbi->options.fs_gid = cur_opts->fs_gid;
sbi->options.fs_fmask = cur_opts->fs_fmask;
sbi->options.fs_dmask = cur_opts->fs_dmask;
} else {
sbi->options.fs_uid = current_uid();
sbi->options.fs_gid = current_gid();
sbi->options.fs_fmask = current->fs->umask;
sbi->options.fs_dmask = current->fs->umask;
}
sbi->options.allow_utime = -1;
sbi->options.errors = EXFAT_ERRORS_RO;
exfat_set_iocharset(&sbi->options, exfat_default_iocharset);