This is just to make this known - on 2.6.14.3-bs3 I did the following: uml_mconsole umid config ubd2=toms.cow config ubd3=toms.cow2 remove ubd2 remove ubd3
this simple sequence leads to a kernel Oops. Complete output below (with printk timestamping enabled, as you see :-( ). (The first is another debug trace, already known) Note that [42949386.950000] Debug: sleeping function called from invalid context at /home/paolo/Admin/kernel/6/VCS/linux-2.6.14/mm/slab.c:2459 [42949386.950000] in_atomic():1, irqs_disabled():0 [42949386.950000] a1fedefc: [<a0014672>] dump_stack+0x22/0x30 [42949386.950000] a1fedf1c: [<a003558c>] __might_sleep+0xac/0xd0 [42949386.950000] a1fedf3c: [<a006aa21>] __kmalloc+0xc1/0x110 [42949386.950000] a1fedf6c: [<a0011a39>] um_kmalloc+0x19/0x20 [42949386.950000] a1fedf7c: [<a001017d>] __wrap_malloc+0x2d/0x80 [42949386.950000] a1fedf8c: [<a01f6c59>] execvp+0x79/0x2b0 [42949386.950000] a1fedfbc: [<a000ed3f>] helper_child+0x2f/0xc0 [42949386.950000] a1fedfdc: [<a01f914a>] clone+0x6a/0x80 [42949386.950000] [42949415.820000] ubdc: unknown partition table [42949423.360000] ubdd: unknown partition table [42949429.550000] ubdc: unknown partition table [42949432.250000] ubdd: unknown partition table (The additions - don't know why duplicated, I notice only now, maybe in this time I played a bit more) [42949436.050000] Kernel panic - not syncing: Segfault with no mm [42949436.050000] [42949436.050000] EIP: 0023:[<a01e0341>] CPU: 0 Not tainted ESP: 002b:40000fac EFLAGS: 00000202 [42949436.050000] Not tainted [42949436.050000] EAX: 00000000 EBX: 00003c02 ECX: 00000013 EDX: 00003c02 [42949436.050000] ESI: 00003bfc EDI: 00000000 EBP: 40000fb8 DS: 002b ES: 002b [42949436.050000] a08ab2ac: [<a0032f7a>] show_regs+0x21a/0x230 [42949436.050000] a08ab2dc: [<a0016edc>] panic_exit+0x2c/0x50 [42949436.050000] a08ab2ec: [<a004ac85>] notifier_call_chain+0x25/0x40 [42949436.050000] a08ab30c: [<a0037c01>] panic+0x71/0x100 [42949436.050000] a08ab32c: [<a00162c5>] segv+0x285/0x2f0 [42949436.050000] a08ab41c: [<a001660e>] segv_handler+0x9e/0x100 [42949436.050000] a08ab44c: [<a001d1a2>] sig_handler_common_skas+0xf2/0x130 [42949436.050000] a08ab47c: [<a002c1b3>] sig_handler+0x33/0x40 [42949436.050000] a08ab48c: [<ffffe500>] _etext+0x5fdd0b4a/0x0 [42949436.050000] a08ab7ec: [<a0149c9c>] kobject_unregister+0x2c/0x50 [42949436.050000] a08ab80c: [<a016184c>] elv_unregister_queue+0x1c/0x30 [42949436.050000] a08ab81c: [<a01669cd>] blk_unregister_queue+0x2d/0x60 [42949436.050000] a08ab83c: [<a0167f72>] unlink_gendisk+0x12/0x30 [42949436.050000] a08ab85c: [<a00ba52e>] del_gendisk+0x5e/0x110 [42949436.050000] a08ab87c: [<a0026948>] ubd_remove+0x58/0x130 [42949436.050000] a08ab9dc: [<a0024ff2>] mconsole_remove+0x152/0x180 [42949436.050000] a08abb1c: [<a002450c>] mc_work_proc+0x4c/0x70 [42949436.050000] a08abb2c: [<a004edde>] worker_thread+0x21e/0x2f0 [42949436.050000] a08abbdc: [<a00531da>] kthread+0xaa/0xe0 [42949436.050000] a08abc1c: [<a002c169>] run_kernel_thread+0x39/0x50 [42949436.050000] a08abcdc: [<a001c7b4>] new_thread_handler+0xc4/0x120 [42949436.050000] a08abd1c: [<ffffe500>] _etext+0x5fdd0b4a/0x0 [42949436.050000] [42949436.050000] * route del -host 192.168.0.6 dev tap1 [42949436.050000] * bash -c echo 0 > /proc/sys/net/ipv4/conf/tap1/proxy_arp [42949436.050000] * arp -i eth0 -d 192.168.0.6 pub deactivate_all_fds failed, errno = 9 -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
