Hello Yorick and Andrew, Yorick Hardy writes: > > > > [...] > > > > > > > > Crash version 9.99.55, image version 9.99.55. > > > > crash: _kvm_kvatop(0) > > > > Kernel compiled without options LOCKDEBUG. > > > > System panicked: vrelel: bad ref count > > > > Backtrace from time of crash is available. > > > > crash> bt > > > > _KERNEL_OPT_NAGR() at 0 > > > > ?() at 7f7ff7ecf000 > > > > sys_reboot() at sys_reboot > > > > vpanic() at vpanic+0x181 > > > > vtryrele() at vtryrele > > > > vcache_dealloc() at vcache_dealloc > > > > uvm_unmap_detach() at uvm_unmap_detach+0x76 > > > > uvm_unmap1() at uvm_unmap1+0x4e > > > > uvm_mremap() at uvm_mremap+0x36b > > > > sys_mremap() at sys_mremap+0x68 > > > > syscall() at syscall+0x227 > > > > --- syscall (number 411) --- > > > > 797459842e9a: > > > > crash> > > > > > > The same just happened on 9.99.56 while fetching (POP) mail using > > > mail/fdm. > > > > Could you file a PR please? If this panics again could you please run the > > "dmesg" command in crash and find out what it printed about the vnode? That > > would be very useful. > > > > Thanks, > > Andrew > > I will do so (... perhaps only this weekend). > [...]
I was able to reproduce it too with a yesterday evening NetBSD/amd64 -current when using mail/fdm and I will try to prepare a minimal reproducer using mail/fdm and file a PR if noone beat me. In the meantime here the information from dmesg: [ 6107.6380323] vnode 0xffffa95219747d40 flags 0x418<MAPPED,MPSAFE,WRMAP> [ 6107.6380323] tag VT_TMPFS(25) type VREG(1) mount 0xffffa951f6d89000 typedata 0xffffa95255e32c90 [ 6107.6380323] usecount 1 writecount 1 holdcount 0 [ 6107.6380323] size 18000 writesize 18000 numoutput 0 [ 6107.6380323] data 0xffffa952583304a0 lock 0xffffa95219747f00 [ 6107.6380323] state LOADED key(0xffffa951f6d89000 8) a0 04 33 58 52 a9 ff ff [ 6107.6380323] lrulisthd 0xffffffff816b5ed0 [ 6107.6380323] tag VT_TMPFS, tmpfs_node 0xffffa952583304a0, flags 0x0, links 1 [ 6107.6380323] mode 0600, owner 1000, group 0, size 98304 [ 6107.6380323] panic: vrelel: bad ref count [ 6107.6380323] cpu0: Begin traceback... [ 6107.6380323] vpanic() at netbsd:vpanic+0x178 [ 6107.6480364] vnpanic() at netbsd:vnpanic+0x49 [ 6107.6480364] vrelel() at netbsd:vrelel+0x5b6 [ 6107.6480364] uvm_unmap_detach() at netbsd:uvm_unmap_detach+0x8e [ 6107.6480364] sys_munmap() at netbsd:sys_munmap+0x85 [ 6107.6480364] syscall() at netbsd:syscall+0x2a0 [ 6107.6480364] --- syscall (number 73) --- [ 6107.6480364] 7c1e5d18414a: [ 6107.6480364] cpu0: End traceback... [ 6107.6480364] fatal breakpoint trap in supervisor mode [ 6107.6480364] trap type 1 code 0 rip 0xffffffff802219fd cs 0x8 rflags 0x202 cr2 0x7f7ff7ee5000 ilevel 0 rsp 0xffffc100c227ae20 [ 6107.6480364] curlwp 0xffffa9521e1b1600 pid 20756.20756 lowest kstack 0xffffc100c22772c0 [ 6107.6480364] dumping to dev 0,1 (offset=276847, size=2062664): [ 6107.6480364] dump If any possible further information is needed do not hesitate to contact me! Thanks!