Date: Mon, 02 Aug 2021 12:27:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 257557] Garbage on disk (or USB memory stick) can cause GEOM taste ffs_sbget() to crash. Message-ID: <bug-257557-227@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257557 Bug ID: 257557 Summary: Garbage on disk (or USB memory stick) can cause GEOM taste ffs_sbget() to crash. Product: Base System Version: 13.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: rtm@lcs.mit.edu Created attachment 226873 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D226873&action= =3Dedit A usb key image that causes a kernel page fault. A USB memory stick with the attached content, if inserted in my 13.0-RELEASE-p3 amd64 machine, causes a crash. Here's a kernel backtrace: panic: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe0009409000 cpuid =3D 0 time =3D 1627895621 KDB: stack backtrace: #0 0xffffffff80c57515 at kdb_backtrace+0x65 #1 0xffffffff80c09ef1 at vpanic+0x181 #2 0xffffffff80c09d63 at panic+0x43 #3 0xffffffff80f289ab at vm_fault+0x144b #4 0xffffffff80f27481 at vm_fault_trap+0xb1 #5 0xffffffff8108b3b8 at trap_pfault+0x1f8 #6 0xffffffff8108a86d at trap+0x27d #7 0xffffffff81061978 at calltrap+0x8 #8 0xffffffff80efc974 at ffs_sbget+0x3c4 #9 0xffffffff80b54a77 at g_label_ufs_taste_common+0x57 #10 0xffffffff80b533af at g_label_taste+0x1df #11 0xffffffff80b51aba at g_new_provider_event+0x7a #12 0xffffffff80b4cc3e at g_run_events+0x12e #13 0xffffffff80bc7e2e at fork_exit+0x7e #14 0xffffffff810629fe at fork_trampoline+0xe You can also get the crash with % sudo mdconfig -f fat12.img fat12.img contains garbage that apparently looks enough like an FFS file system that GEOM taste's call to ffs_sbget() proceeds, but then crashes near the end. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-257557-227>