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[uml-user] linxu kernel 3.5 - first experience
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From: Toralf F. <tor...@gm...> - 2012-07-22 10:42:47
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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 |
