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Description: Race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode BUG in include/linux/swapops.h
References:
https://bugzilla.redhat.com/show_bug.cgi?id=2236982
Notes:
carnil> Commit fixes b569a1760782f ("userfaultfd: wp: drop
carnil> _PAGE_UFFD_WP properly when fork") in 5.7-rc1.
carnil> The RHBZ#2236982 contains only limited available information so
carnil> please review this entry.
Bugs:
upstream: released (5.14-rc1) [8f34f1eac3820fc2722e5159acceb22545b30b0d]
6.1-upstream-stable: N/A "Fixed before branching point"
5.10-upstream-stable: released (5.10.53) [9e1cf2d1ed37c934c9935f2c0b2f8b15d9355654]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.14.6-1)
6.1-bookworm-security: N/A "Fixed before branching point"
5.10-bullseye-security: released (5.10.70-1)
4.19-buster-security: N/A "Vulnerable code not present"
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