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Commit c34706ac authored by Amir Goldstein's avatar Amir Goldstein
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ovl: fix regression in parsing of mount options with escaped comma



Ever since commit 91c77947 ("ovl: allow filenames with comma"), the
following example was legit overlayfs mount options:

  mount -t overlay overlay -o 'lowerdir=/tmp/a\,b/lower' /mnt

The conversion to new mount api moved to using the common helper
generic_parse_monolithic() and discarded the specialized ovl_next_opt()
option separator.

Bring back ovl_next_opt() and use vfs_parse_monolithic_sep() to fix the
regression.

Reported-by: default avatarRyan Hendrickson <ryan.hendrickson@alum.mit.edu>
Closes: https://lore.kernel.org/r/8da307fb-9318-cf78-8a27-ba5c5a0aef6d@alum.mit.edu/


Fixes: 1784fbc2 ("ovl: port to new mount api")
Signed-off-by: default avatarAmir Goldstein <amir73il@gmail.com>
parent e001d144
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