https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207464
Bug ID: 207464 Summary: Panic when destroying ZFS snapshot on boot filesystem Product: Base System Version: 10.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: dustinw...@ebureau.com CC: freebsd-am...@freebsd.org CC: freebsd-am...@freebsd.org FreeBSD 10.3-PRERELEASE #13 r295115M: Mon Feb 1 13:08:30 CST 2016 When destroying a ZFS snapshot of the boot filesystem, the system panicked with the message: vputx: negative ref cnt KDB stack backtrace: vputx: negative ref count 0xfffff801d7ab7b10: tag zfs, type VDIR usecount 0, writecount 0, refcount 0 mountedhere 0 flags (VI_FREE) VI_LOCKed lock type zfs: EXCL by thread 0xfffff80448797960 (pid 7211, zfs, tid 101642) panic: vputx: negative ref cnt cpuid = 13 KDB: stack backtrace: #0 0xffffffff8098f7f0 at kdb_backtrace+0x60 #1 0xffffffff80952896 at vpanic+0x126 #2 0xffffffff80952763 at panic+0x43 #3 0xffffffff809f94e5 at vputx+0x2d5 #4 0xffffffff809f2a99 at dounmount+0x689 #5 0xffffffff81a851d4 at zfs_unmount_snap+0x114 #6 0xffffffff81a884f1 at zfs_ioc_destroy_snaps+0xc1 #7 0xffffffff81a86f54 at zfsdev_ioctl+0x664 #8 0xffffffff80837469 at devfs_ioctl_f+0x139 #9 0xffffffff809aa085 at kern_ioctl+0x255 #10 0xffffffff809a9d80 at sys_ioctl+0x140 #11 0xffffffff80d68aff at amd64_syscall+0x40f #12 0xffffffff80d4dd7b at Xfast_syscall+0xfb Uptime: 4h4m41s (kgdb) bt #0 __curthread () at ./machine/pcpu.h:219 #1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:298 #2 0xffffffff809524f2 in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:486 #3 0xffffffff809528d5 in vpanic (fmt=<optimized out>, ap=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:889 #4 0xffffffff80952763 in panic (fmt=<unavailable>) at /usr/src/sys/kern/kern_shutdown.c:818 #5 0xffffffff809f94e5 in vputx (vp=0xfffff801d7ab7b10, func=<optimized out>) at /usr/src/sys/kern/vfs_subr.c:2510 #6 0xffffffff809f2a99 in dounmount (mp=0xfffff80142dc4660, flags=<optimized out>, td=<optimized out>) at /usr/src/sys/kern/vfs_mount.c:1359 #7 0xffffffff81a851d4 in zfs_unmount_snap (snapname=<optimized out>) at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c:3485 #8 0xffffffff81a884f1 in zfs_ioc_destroy_snaps (poolname=0xfffffe00170f8000 "zroot", innvl=<optimized out>, outnvl=0xfffff804488297a0) at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c:3558 #9 0xffffffff81a86f54 in zfsdev_ioctl (dev=<optimized out>, zcmd=<optimized out>, arg=<optimized out>, flag=<optimized out>, td=<optimized out>) at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c:6278 #10 0xffffffff80837469 in devfs_ioctl_f (fp=0xfffff8001ff5b8c0, com=3222821411, data=0xfffffe085e28b8e0, cred=<optimized out>, td=0xfffff80448797960) at /usr/src/sys/fs/devfs/devfs_vnops.c:786 #11 0xffffffff809aa085 in fo_ioctl (fp=<optimized out>, com=<optimized out>, data=<optimized out>, active_cred=<optimized out>, td=<optimized out>, fp=<optimized out>, com=<optimized out>, data=<optimized out>, active_cred=<optimized out>, td=<optimized out>) at /usr/src/sys/sys/file.h:321 #12 kern_ioctl (td=0xfffff80448797960, fd=<optimized out>, com=<unavailable>) at /usr/src/sys/kern/sys_generic.c:809 #13 0xffffffff809a9d80 in sys_ioctl (td=0xfffff80448797960, uap=0xfffffe085e28ba40) at /usr/src/sys/kern/sys_generic.c:718 #14 0xffffffff80d68aff in syscallenter (td=<optimized out>, sa=<optimized out>, td=<optimized out>, sa=<optimized out>) at /usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:141 #15 amd64_syscall (td=0xfffff80448797960, traced=0) at /usr/src/sys/amd64/amd64/trap.c:959 #16 <signal handler called> #17 0x0000000801a05f1a in ?? () Backtrace stopped: Cannot access memory at address 0x7fffffffc8c8 -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-bugs@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"