Date: Sat, 31 Jul 2021 23:39:45 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 257522] msdosfs rename(2) deadlock Message-ID: <bug-257522-227-VpbRoCahYK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-257522-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257522 Konstantin Belousov <kib@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kib@FreeBSD.org --- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> --- msdosfs_rename() has the same issue as was present in ufs_rename() long time ago. First, relookup() cannot be used while any vnode is locked. Instead, special non-sleeping variant of msdosfs_lookup() needs to be made available and applied there. It is already coded (dd_ino != NULL for msdosfs_lookup_() I believe), just needs to be exposed and applied. Another issue is that function prologue must not use sleepable vn_lock() when owning any other vnode lock. Mostly, it needs to mimic the structure of ufs_rename() for acquiring all three or four locks. -- You are receiving this mail because: You are the assignee for the bug.help
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