[DragonFlyBSD - Bug #2498] DFBSD v3.2.2-RELEASE - LIST_FIRST(&bp->b_dep) == NULL" failed in vfs_vmio_release

["Antonio M. Huete Jimenez via Redmine" <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>]

Issue #2498 has been reported by tuxillo.

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Bug #2498: DFBSD v3.2.2-RELEASE - LIST_FIRST(&bp->b_dep) == NULL" failed in vfs_vmio_release
http://bugs.dragonflybsd.org/issues/2498

Author: tuxillo
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


Hi,

Right after adding a new volume to a live HAMMER filesystem, rebooting causes panic below:
Switching to cpu #0 for shutdown
Waiting (max 60 seconds) for system thread vnlru to stop...stopped
Waiting (max 60 seconds) for system thread consttyd to stop...stopped
Waiting (max 60 seconds) for system thread swapcached to stop...stopped
Waiting (max 60 seconds) for system thread bufdaemon_hw to stop...stopped
Waiting (max 60 seconds) for system thread bufdaemon to stop...stopped
Waiting (max 60 seconds) for system thread syncer0 to stop...stopped

syncing disks... 
done
panic: assertion "LIST_FIRST(&bp->b_dep) == NULL" failed in vfs_vmio_release at /build/home/justin/src/sys/kern/vfs_bio.c:1867
cpuid = 0
Trace beginning at frame 0xffffffe0456b74b8
panic() at panic+0x1fb 0xffffffff804ed5c8 
panic() at panic+0x1fb 0xffffffff804ed5c8 
vfs_vmio_release() at vfs_vmio_release+0x256 0xffffffff805487a3 
brelse() at brelse+0x3dd 0xffffffff805497ce 
vinvalbuf_bp() at vinvalbuf_bp+0x168 0xffffffff8055fb22 
buf_rb_tree_RB_SCAN() at buf_rb_tree_RB_SCAN+0xf7 0xffffffff8055ff79 
vinvalbuf() at vinvalbuf+0xec 0xffffffff80560533 
vclean_vxlocked() at vclean_vxlocked+0xbd 0xffffffff805606ed 
vgone_vxlocked() at vgone_vxlocked+0x4c 0xffffffff805608fd 
vflush_scan() at vflush_scan+0x92 0xffffffff80563a0d 
vmntvnodescan() at vmntvnodescan+0x1b3 0xffffffff80563bf5 
vflush() at vflush+0x166 0xffffffff80563e69 
devfs_vfs_unmount() at devfs_vfs_unmount+0x42 0xffffffff806c85f7 
vfs_unmount() at vfs_unmount+0x83 0xffffffff80571ef0 
dounmount() at dounmount+0x221 0xffffffff8056d125 
vfs_umountall_callback() at vfs_umountall_callback+0x1e 0xffffffff8055ec79 
mountlist_scan() at mountlist_scan+0x137 0xffffffff80564259 
vfs_unmountall() at vfs_unmountall+0x22 0xffffffff8055de5d 
boot() at boot+0x2fa 0xffffffff804ed1f2 
sys_reboot() at sys_reboot+0x42 0xffffffff804ed836 
syscall2() at syscall2+0x370 0xffffffff8089ff81 
Xfast_syscall() at Xfast_syscall+0xcb 0xffffffff808897cb 


Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic->id = 00000000
fault virtual address   = 0x100000007
fault code              = supervisor read data, page not present
instruction pointer     = 0x8:0xffffffff80899709
stack pointer           = 0x10:0xffffffe0456b7368
frame pointer           = 0x10:0xffffffe0456b7368
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1014
current thread          = pri 31 
kernel: type 12 trap, code=0

Coredump can be found in: leaf:~tuxillo/listfirst_*.0

Cheers,
Antonio Huete





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