Toralf Förster wrote: > This is still related to investigate an issue with a hanging UML/crashing UML > (32 bit Gentoo Linux as host and guest). > > The following output was derived from the gdb - does it contain any helpful > information ? > The host kernel is 3.7.1, the guest ran a linux-v3.7-9431-gfa4c95b kernel > > > > 0x0805f27c in from_irq_stack (nested=0) at arch/um/kernel/irq.c:462 > 462 current->stack = to; > (gdb) cont > Continuing. > > > > Program received signal SIGSEGV, Segmentation fault. > > 0x0805f27c in from_irq_stack (nested=0) at arch/um/kernel/irq.c:462 > > 462 current->stack = to; > > (gdb) bt > > #0 0x0805f27c in from_irq_stack (nested=0) at arch/um/kernel/irq.c:462 > > #1 0x080717dd in hard_handler (sig=<optimized out>, si=0x83fdb0c > <cpu0_irqstack+2828>, > > p=0x83fdb8c <cpu0_irqstack+2956>) at arch/um/os-Linux/signal.c:175 > > #2 <signal handler called> > > #3 get_symbol_pos (addr=134759829, symbolsize=0x383e9170, offset=0x383e916c) > > at kernel/kallsyms.c:219 > #4 0x080b728e in kallsyms_lookup (addr=134759829, symbolsize=0x383e9170, > offset=0x383e916c, > modname=0x383e9168, namebuf=0x383e91a1 "") at kernel/kallsyms.c:295 > #5 0x080b7327 in __sprint_symbol (buffer=0x383e91a1 "", address=134759829, > symbol_offset=0, > add_offset=1) at kernel/kallsyms.c:354 > #6 0x080b74da in sprint_symbol (buffer=0x383e91a1 "", address=134759829) at > kernel/kallsyms.c:385 > #7 0x082677d7 in symbol_string (buf=0x84c8343 <textbuf.25117+35> "---\n", > end=0x84c8700 <cont> "Netdevice 0 (72:ef:3d:35:64:64) : xes 6 to > 9)e...No, enabling workaround", > ptr=<optimized out>, ext=83 'S', spec=...) at lib/vsprintf.c:537 > #8 0x0826814d in pointer (fmt=<optimized out>, buf=0x84c8343 > <textbuf.25117+35> "---\n", > end=<optimized out>, ptr=0x8084595 <local_bh_enable+69>, spec=...) at > lib/vsprintf.c:1054 > #9 0x08267f1a in vsnprintf ( > buf=0x84c8320 <textbuf.25117> "\001\064WARNING: at kernel/softirq.c:160 > ---\n", size=992, > fmt=0x83aec3a "pS()\n", args=0x383e93a0 "\225E\b\b") at > lib/vsprintf.c:1442 > #10 0x08268467 in vscnprintf ( > buf=0x84c8320 <textbuf.25117> "\001\064WARNING: at kernel/softirq.c:160 > ---\n", size=992, > fmt=0x83aec25 "\001\064WARNING: at %s:%d %pS()\n", args=0x383e9394 > "\034\355:\b\240") > at lib/vsprintf.c:1548 > #11 0x0807eff8 in vprintk_emit (facility=0, level=-1, dict=0x0, dictlen=0, > fmt=0x83aec25 "\001\064WARNING: at %s:%d %pS()\n", args=0x383e9394 > "\034\355:\b\240") > at kernel/printk.c:1545 > #12 0x0833a37d in printk (fmt=0x83aec25 "\001\064WARNING: at %s:%d %pS()\n") > at kernel/printk.c:1687 > #13 0x0807d630 in warn_slowpath_common (file=0x83aed1c "kernel/softirq.c", > line=160, > caller=<optimized out>, taint=9, args=0x0) at kernel/panic.c:413 > ---Type <return> to continue, or q <return> to quit--- > #14 0x0807d713 in warn_slowpath_null (file=0x83aed1c "kernel/softirq.c", > line=160) > at kernel/panic.c:454 > #15 0x08084595 in _local_bh_enable_ip (ip=<optimized out>) at > kernel/softirq.c:160 > #16 local_bh_enable () at kernel/softirq.c:187 > #17 0x082aa680 in rcu_read_unlock_bh () at include/linux/rcupdate.h:827 > #18 dev_queue_xmit (skb=0x381c6e40) at net/core/dev.c:2735 > #19 0x082ccaa2 in neigh_hh_output (skb=<optimized out>, hh=<optimized out>) > at include/net/neighbour.h:356 > #20 dst_neigh_output (skb=0x381c6e40, n=0x3841d900, dst=<optimized out>) at > include/net/dst.h:412 > #21 ip_finish_output2 (skb=0x381c6e40) at net/ipv4/ip_output.c:201 > #22 ip_finish_output (skb=<optimized out>) at net/ipv4/ip_output.c:234 > #23 0x082ccb43 in ip_output (skb=0x381c6e40) at net/ipv4/ip_output.c:307 > #24 0x082cbb23 in dst_output (skb=0x381c6e40) at include/net/dst.h:449 > #25 ip_local_out (skb=0x381c6e40) at net/ipv4/ip_output.c:110 > #26 0x082cbcce in ip_build_and_send_pkt (skb=0x381c6e40, sk=0x382b0a00, > saddr=1090562240, > daddr=4261456064, opt=0x0) at net/ipv4/ip_output.c:162 > #27 0x082e874a in tcp_v4_conn_request (sk=0x382b0a00, skb=0x381c6780) at > net/ipv4/tcp_ipv4.c:1646 > #28 0x082df88c in tcp_rcv_state_process (sk=0x382b0a00, skb=0x381c6780, > th=0x38269562, len=40) > at net/ipv4/tcp_input.c:5942 > #29 0x082e6577 in tcp_v4_do_rcv (sk=0x382b0a00, skb=0x381c6780) at > net/ipv4/tcp_ipv4.c:1890 > #30 0x082e90fe in tcp_v4_rcv (skb=0x381c6780) at net/ipv4/tcp_ipv4.c:2030 > #31 0x082c82be in ip_local_deliver_finish (skb=0x381c6780) at > net/ipv4/ip_input.c:225 > #32 ip_local_deliver (skb=0x381c6780) at net/ipv4/ip_input.c:263 > #33 0x082c87ca in dst_input (skb=0x381c6780) at include/net/dst.h:455 > #34 ip_rcv_finish (skb=0x381c6780) at net/ipv4/ip_input.c:373 > #35 ip_rcv (skb=<optimized out>, dev=0x380f2000, pt=0x841fcc0 > <ip_packet_type>, orig_dev=0x380f2000) > at net/ipv4/ip_input.c:451 > #36 0x082a7c70 in __netif_receive_skb (skb=0x381c6780) at net/core/dev.c:3456 > #37 0x082a7d39 in process_backlog (napi=0x8422600 <softnet_data+64>, quota=1) > at net/core/dev.c:3925 > ---Type <return> to continue, or q <return> to quit--- > #38 0x082ab412 in net_rx_action (h=0x84c8fcc <softirq_vec+12>) at > net/core/dev.c:4083 > #39 0x080843d2 in __do_softirq () at kernel/softirq.c:247 > #40 0x08084536 in do_softirq () at kernel/softirq.c:295 > #41 0x0808473d in invoke_softirq () at kernel/softirq.c:329 > #42 irq_exit () at kernel/softirq.c:348 > #43 0x0805ee8a in do_IRQ (irq=5, regs=0x383e9820) at arch/um/kernel/irq.c:295 > #44 0x0805ef05 in sigio_handler (sig=29, unused_si=0x0, regs=0x383e9820) at > arch/um/kernel/irq.c:53 > #45 0x08071b28 in sig_handler_common (sig=29, si=0x0, mc=0x0) at > arch/um/os-Linux/signal.c:44 > #46 0x08071a4b in unblock_signals () at arch/um/os-Linux/signal.c:282 > #47 0x08071bce in set_signals (enable=1) at arch/um/os-Linux/signal.c:302 > #48 0x0808453e in arch_local_irq_restore (flags=1) > at /home/tfoerste/devel/linux/arch/um/include/asm/irqflags.h:16 > #49 do_softirq () at kernel/softirq.c:297 > #50 0x080845d7 in _local_bh_enable_ip (ip=<optimized out>) at > kernel/softirq.c:176 > #51 local_bh_enable () at kernel/softirq.c:187 > #52 0x082ccac4 in rcu_read_unlock_bh () at include/linux/rcupdate.h:827 > #53 ip_finish_output2 (skb=0x3817b0b0) at net/ipv4/ip_output.c:203 > #54 ip_finish_output (skb=<optimized out>) at net/ipv4/ip_output.c:234 > #55 0x082ccb43 in ip_output (skb=0x3817b0b0) at net/ipv4/ip_output.c:307 > #56 0x082cbb23 in dst_output (skb=0x3817b0b0) at include/net/dst.h:449 > #57 ip_local_out (skb=0x3817b0b0) at net/ipv4/ip_output.c:110 > #58 0x082cbfdd in ip_queue_xmit (skb=0x3817b0b0, fl=0x382b15c8) at > net/ipv4/ip_output.c:403 > #59 0x082e1e77 in tcp_transmit_skb (sk=0x382b1400, skb=0x3817b0b0, > clone_it=<optimized out>, > gfp_mask=32) at net/ipv4/tcp_output.c:1106 > #60 0x082e288c in tcp_write_xmit (sk=0x382b1400, mss_now=1448, nonagle=1, > push_one=0, gfp=32) > at net/ipv4/tcp_output.c:2029 > #61 0x082e2a68 in __tcp_push_pending_frames (sk=0x382b1400, cur_mss=1448, > nonagle=1) > at net/ipv4/tcp_output.c:2068 > #62 0x082d4474 in tcp_push (nonagle=<optimized out>, mss_now=1448, flags=64, > sk=0x382b1400) > ---Type <return> to continue, or q <return> to quit--- > at net/ipv4/tcp.c:636 > #63 tcp_sendmsg (iocb=0x383e9d68, sk=0x382b1400, msg=0x383e9d20, size=826) at > net/ipv4/tcp.c:1225 > #64 0x082f75b3 in inet_sendmsg (iocb=0x383e9d68, sock=0x37cea900, > msg=0x383e9d20, size=826) > at net/ipv4/af_inet.c:784 > #65 0x082980ec in __sock_sendmsg_nosec (size=<optimized out>, msg=0x383e9d20, > sock=0x37cea900, > iocb=0x383e9d68) at net/socket.c:628 > #66 __sock_sendmsg (size=<optimized out>, msg=0x383e9d20, sock=0x37cea900, > iocb=0x383e9d68) > at net/socket.c:636 > #67 do_sock_write (nr_segs=2, iov=0x383e9e18, iocb=0x383e9d68, > msg=0x383e9d20, file=<optimized out>) > at net/socket.c:974 > #68 sock_aio_write (iocb=0x383e9d68, iov=0x383e9e18, nr_segs=2, pos=0) at > net/socket.c:989 > #69 0x081002f6 in do_sync_readv_writev (filp=0x3838a080, iov=0x383e9e18, > nr_segs=2, len=826, > ppos=0x383e9e94, fn=0x8297fd0 <sock_aio_write>) at fs/read_write.c:572 > #70 0x081005bf in do_readv_writev (type=1, file=0x3838a080, > uvector=<optimized out>, nr_segs=2, > pos=0x383e9e94) at fs/read_write.c:730 > #71 0x08100763 in vfs_writev (file=0x3838a080, vec=0x4b448bd0, vlen=2, > pos=0x383e9e94) > at fs/read_write.c:768 > #72 0x08100870 in sys_writev (fd=13, vec=0x4b448bd0, vlen=2) at > fs/read_write.c:800 > #73 0x08062b22 in handle_syscall (r=0x383ccd50) at > arch/um/kernel/skas/syscall.c:35 > #74 0x08074f6d in handle_trap (local_using_sysemu=<optimized out>, > regs=0x383ccd50, pid=10301) > at arch/um/os-Linux/skas/process.c:193 > #75 userspace (regs=0x383ccd50) at arch/um/os-Linux/skas/process.c:426 > #76 0x0805f7fc in fork_handler () at arch/um/kernel/process.c:160 > #77 0x00000002 in ?? () > ( > > Hi,
I increased the stack size (CONFIG_KERNEL_STACK_ORDER) in the guest kernel and the problem went away. I think I had a very similar problem under 32 bit with Gentoo host/guest. Tully Gray. ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
