Date: Sat, 09 Oct 2021 11:22:39 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 259024] ext2_search_dirblock() loops forever if e2d_reclen is zero Message-ID: <bug-259024-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259024 Bug ID: 259024 Summary: ext2_search_dirblock() loops forever if e2d_reclen is zero Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: rtm@lcs.mit.edu Created attachment 228539 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=228539&action=edit An ext3 disk image that causes ext2_search_dirblock() to loop forever. The code in ext2_search_dirblock() that handles e2d_reclen == 0 doesn't increment ep, and thus loops forever. I've attached a demo: % gunzip ext34.img.gz % sudo mdconfig -f ext34.img % sudo mount -t ext2fs -o ro /dev/md0 /mnt % sudo cp /mnt/a /dev/null <the lookup never finishes> FreeBSD unmatched 14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-n249571-b5f90655ea3: Thu Sep 23 06:10:05 UTC 2021 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/riscv.riscv64/sys/GENERIC riscv -- You are receiving this mail because: You are the assignee for the bug.help
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