Date: Sun, 23 Feb 2020 20:22:05 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 244350] [6] [Kernel panic: getblk: size(75776) > maxbcachebuf(65536)] observed while mouting the UFS USB drive on FreeBSD13-CURRENT, FreeBSD 12.1-RELEASE r354233 and FreeBSD 12.1-STABLE r358121 Message-ID: <bug-244350-227@https.bugs.freebsd.org/bugzilla/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244350 Bug ID: 244350 Summary: [6] [Kernel panic: getblk: size(75776) > maxbcachebuf(65536)] observed while mouting the UFS USB drive on FreeBSD13-CURRENT, FreeBSD 12.1-RELEASE r354233 and FreeBSD 12.1-STABLE r358121 Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: neerajpal09@gmail.com Created attachment 211872 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D211872&action= =3Dedit Contains PoC UFS image and detailed logs includes 13-current, 12.1-release = and 12.1-stable Hi there, Kernel Panic is observed while mounting the usb drive which contains malici= ous UFS filesystem image. But if the automount is configured or user has ability to mount the usb dri= ve then during mount kernel panic occurs. No user authentication and interaction is needed in case of automount is configured, tested with "/etc/fstab". Just flash the attached UFS image to usb drive and plug the usb drive to FreeBSD 13-CURRENT, 12.1-RELEASE, or 12.1-STABLE, then mount it. [Kernel Log - FreeBSD 13-CURRENT] freebsd dumped core - see /var/crash/vmcore.3 Wed Feb 19 18:42:20 UTC 2020 FreeBSD freebsd 13.0-CURRENT FreeBSD 13.0-CURRENT #0: Wed Feb 19 01:58:08 UTC 2020 root@freebsd:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64 panic: getblk: size(75776) > maxbcachebuf(65536) GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain condition= s. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-marcel-freebsd"... Unread portion of the kernel message buffer: panic: getblk: size(75776) > maxbcachebuf(65536) cpuid =3D 2 time =3D 1582135933 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0039ea3= 320 vpanic() at vpanic+0x185/frame 0xfffffe0039ea3380 panic() at panic+0x43/frame 0xfffffe0039ea33e0 getblkx() at getblkx+0x807/frame 0xfffffe0039ea34b0 breadn_flags() at breadn_flags+0x44/frame 0xfffffe0039ea3520 ffs_use_bread() at ffs_use_bread+0x70/frame 0xfffffe0039ea3590 ffs_sbget() at ffs_sbget+0x24f/frame 0xfffffe0039ea3600 ffs_mount() at ffs_mount+0xdf3/frame 0xfffffe0039ea37b0 vfs_domount() at vfs_domount+0x83c/frame 0xfffffe0039ea39e0 vfs_donmount() at vfs_donmount+0x911/frame 0xfffffe0039ea3a80 sys_nmount() at sys_nmount+0x69/frame 0xfffffe0039ea3ac0 amd64_syscall() at amd64_syscall+0x168/frame 0xfffffe0039ea3bf0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0039ea3bf0 --- syscall (378, FreeBSD ELF64, sys_nmount), rip =3D 0x8002f7a1a, rsp =3D 0x7fffffffd3b8, rbp =3D 0x7fffffffd920 --- KDB: enter: panic Uptime: 39m54s Dumping 258 out of 4062 MB:..7%..13%..25%..31%..44%..56%..62%..75%..81%..93% [Attachments] + UFS filesystem image + detailed logs from FreeBSD 13-CURRENT, 12.1-RELEASE, and 12.1-STABLE. --=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-244350-227>