With Linux n22 3.5.0-rc7+ as a host kernel and 3.5 as guest kernel my unstable Gentoo system hangs after a while. The back trace derived from gdb shows :
(gdb) bt #0 0x0805f43b in from_irq_stack (nested=0) at arch/um/kernel/irq.c:462 #1 0x080739ec in hard_handler (sig=<optimized out>, info=0x83aac8c, p=0x83aad0c) at arch/um/os-Linux/signal.c:174 #2 <signal handler called> #3 0xb774b424 in __kernel_vsyscall () #4 0x4b407633 in __write_nocancel () at ../sysdeps/unix/syscall-template.S:82 #5 0x08069d50 in net_write (fd=14, buf=0x1b972056, len=74) at arch/um/drivers/net_user.c:127 #6 0x08075845 in tuntap_write (fd=14, skb=0x1fdf4900, lp=0x1fcc23a0) at arch/um/os-Linux/drivers/tuntap_kern.c:46 #7 0x080688db in uml_net_start_xmit (skb=0x1fdf4900, dev=0x1fcc2000) at arch/um/drivers/net_kern.c:220 #8 0x08283cdc in dev_hard_start_xmit (skb=0x1fdf4900, dev=0x1fcc2000, txq=0x1fd38280) at net/core/dev.c:2212 #9 0x082992f3 in sch_direct_xmit (skb=0x1fdf4900, q=0x1ff31400, dev=0x1fcc2000, txq=0x1fd38280, root_lock=0x1ff3145c) at net/sched/sch_generic.c:124 #10 0x082841ad in __dev_xmit_skb (txq=<optimized out>, dev=0x1fcc2000, q=0x1ff31400, skb=0x1fdf4900) at net/core/dev.c:2415 #11 dev_queue_xmit (skb=0x1fdf4900) at net/core/dev.c:2508 #12 0x082a8a48 in neigh_hh_output (hh=<optimized out>, skb=<optimized out>) at include/net/neighbour.h:351 #13 neigh_output (skb=<optimized out>, n=0x1fd89100) at include/net/neighbour.h:358 #14 ip_finish_output2 (skb=<optimized out>) at net/ipv4/ip_output.c:210 #15 ip_finish_output (skb=<optimized out>) at net/ipv4/ip_output.c:243 #16 0x082a8c11 in ip_output (skb=0x1fdf4900) at net/ipv4/ip_output.c:316 #17 0x082a7ae3 in dst_output (skb=0x1fdf4900) at include/net/dst.h:435 #18 ip_local_out (skb=0x1fdf4900) at net/ipv4/ip_output.c:110 #19 0x082a7c17 in ip_build_and_send_pkt (skb=0x1fdf4900, sk=0x1ffb4e40, saddr=838969536, daddr=4261456064, opt=0x0) at net/ipv4/ip_output.c:175 #20 0x082c21f4 in tcp_v4_send_synack (sk=0x1ffb4e40, dst=0x1fe6c180, req=0x1feb2d80, rvp=0x1b866608, queue_mapping=0) at net/ipv4/tcp_ipv4.c:845 #21 0x082c460d in tcp_v4_conn_request (sk=0x1ffb4e40, skb=0x1fdf4780) at net/ipv4/tcp_ipv4.c:1426 #22 0x082bc44c in tcp_rcv_state_process (sk=0x1ffb4e40, skb=0x1fdf4780, th=0x1ff7c062, len=40) at net/ipv4/tcp_input.c:6034 #23 0x082c292d in tcp_v4_do_rcv (sk=0x1ffb4e40, skb=0x1fdf4780) at net/ipv4/tcp_ipv4.c:1652 #24 0x082c518d in tcp_v4_rcv (skb=0x1fdf4780) at net/ipv4/tcp_ipv4.c:1755 #25 0x082a3f55 in ip_local_deliver_finish (skb=0x1fdf4780) at net/ipv4/ip_input.c:226 #26 ip_local_deliver (skb=0x1fdf4780) at net/ipv4/ip_input.c:264 #27 0x082a432f in dst_input (skb=0x1fdf4780) at include/net/dst.h:441 #28 ip_rcv_finish (skb=0x1fdf4780) at net/ipv4/ip_input.c:365 #29 ip_rcv (skb=<optimized out>, dev=0x1fcc2000, pt=0x83c1be0, orig_dev=0x1fcc2000) at net/ipv4/ip_input.c:443 #30 0x08281960 in __netif_receive_skb (skb=0x1fdf4780) at net/core/dev.c:3235 #31 0x08281b66 in process_backlog (napi=0x83c4300, quota=2) at net/core/dev.c:3685 #32 0x082853fc in net_rx_action (h=0x83e0ecc) at net/core/dev.c:3843 #33 0x08085c06 in __do_softirq () at kernel/softirq.c:238 #34 0x08085de5 in do_softirq () at kernel/softirq.c:285 #35 0x08086025 in invoke_softirq () at kernel/softirq.c:319 #36 irq_exit () at kernel/softirq.c:338 #37 0x0805f01a in do_IRQ (irq=5, regs=0x1b8668f0) at arch/um/kernel/irq.c:295 #38 0x0805f08b in sigio_handler (sig=29, regs=0x1b8668f0) at arch/um/kernel/irq.c:53 #39 0x08073ced in sig_handler_common (sig=29, mc=0x0) at arch/um/os-Linux/signal.c:43 #40 0x08073c7e in unblock_signals () at arch/um/os-Linux/signal.c:278 #41 0x0822e185 in arch_local_irq_enable () at /home/tfoerste/devel/linux/arch/um/include/asm/irqflags.h:21 #42 spin_unlock_irq (lock=<optimized out>) at include/linux/spinlock.h:335 #43 blk_queue_bio (q=0x1fd7e000, bio=0x1feb2600) at block/blk-core.c:1531 #44 0x0822cbd6 in generic_make_request (bio=0x1feb2600) at block/blk-core.c:1782 #45 0x0822ccb6 in submit_bio (rw=96, bio=0x1feb2600) at block/blk-core.c:1829 #46 0x08128a6c in submit_bh (rw=96, bh=0x1d162620) at fs/buffer.c:2917 #47 0x081633f5 in ext3_find_entry (dir=0x1e30b7b4, entry=0x1d163994, res_dir=0x1b866d08) at fs/ext3/namei.c:915 #48 0x0816357d in ext3_lookup (dir=0x1e30b7b4, dentry=0x1d163980, nd=0x1b866df0) at fs/ext3/namei.c:1023 #49 0x0810a221 in lookup_real (nd=0x1b866df0, dentry=0x1d163980, dir=<optimized out>) at fs/namei.c:1102 #50 __lookup_hash (name=0x1b866df8, base=0x1e2ed280, nd=0x1b866df0) at fs/namei.c:1120 #51 0x0810b40a in lookup_slow (nd=0x1b866df0, name=<optimized out>, path=0x1b866d98) at fs/namei.c:1239 #52 0x0810c6cf in walk_component (follow=1, name=0x1b866df8, path=0x1b866d98, nd=0x1b866df0, type=<optimized out>) at fs/namei.c:1329 #53 lookup_last (path=0x1b866d98, nd=0x1b866df0) at fs/namei.c:1739 #54 path_lookupat (dfd=<optimized out>, name=0x41 <Address 0x41 out of bounds>, flags=65, nd=0x1b866df0) at fs/namei.c:1774 #55 0x0810c715 in do_path_lookup (dfd=-100, name=0x1fe75000 "/usr/share/doc/apache-2.4.2/manual/style/css/manual.css", flags=1, nd=0x1b866df0) at fs/namei.c:1809 #56 0x0810cbfb in user_path_at_empty (dfd=-100, name=0x42210558 <Address 0x42210558 out of bounds>, flags=1, path=0x1b866e90, empty=0x0) at fs/namei.c:1929 #57 0x0810cc8e in user_path_at (dfd=-100, name=0x42210558 <Address 0x42210558 out of bounds>, flags=1, path=0x1b866e90) at fs/namei.c:1940 #58 0x08104f87 in vfs_fstatat (dfd=-100, filename=0x42210558 <Address 0x42210558 out of bounds>, stat=0x1b866ec4, flag=<optimized out>) at fs/stat.c:88 #59 0x08104ff8 in vfs_stat (name=0x42210558 <Address 0x42210558 out of bounds>, stat=0x1b866ec4) at fs/stat.c:101 #60 0x08105249 in sys_stat64 (filename=0x42210558 <Address 0x42210558 out of bounds>, statbuf=0x4e316f80) at fs/stat.c:376 #61 0x08062e73 in handle_syscall (r=0x1b875e90) at arch/um/kernel/skas/syscall.c:35 #62 0x08077224 in handle_trap (local_using_sysemu=2, regs=0x1b875e90, pid=2444) at arch/um/os-Linux/skas/process.c:193 #63 userspace (regs=0x1b875e90) at arch/um/os-Linux/skas/process.c:418 #64 0x0805fc94 in fork_handler () at arch/um/kernel/process.c:181 #65 0x00000000 in ?? () :-( -- MfG/Sincerely Toralf Förster pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
