Core dump limits : soft - 0 hard - NONE Checking that ptrace can change system call numbers...OK Checking syscall emulation patch for ptrace...OK Checking advanced syscall emulation patch for ptrace...OK Checking for tmpfs mount on /dev/shm...OK Checking PROT_EXEC mmap in /dev/shm/...OK Checking for the skas3 patch in the host: - /proc/mm...found - PTRACE_FAULTINFO...found - PTRACE_LDT...found UML running in SKAS3 mode Program received signal SIGSEGV, Segmentation fault. 0x084a3c83 in abort () at include/net/sock.h:269 269 return hlist_entry(head->first, struct sock, sk_node); backtrace: #0 0x084a3c83 in abort () at include/net/sock.h:269 #1 0x08093070 in os_dump_core () at arch/um/os-Linux/util.c:109 #2 0x0806d2c0 in panic_exit (self=0x85ba2fc, unused1=0, unused2=0x8b4b240) at arch/um/kernel/um_arch.c:477 #3 0x080d11e9 in notifier_call_chain (nl=0x8b4b220, val=0, v=0x8b4b240, nr_to_call=-2, nr_calls=0x0) at kernel/sys.c:163 #4 0x080d13c0 in __atomic_notifier_call_chain (nh=0x8b4b220, val=0, v=0x8b4b240, nr_to_call=-1, nr_calls=0x0) at kernel/sys.c:256 #5 0x080d1412 in atomic_notifier_call_chain (nh=0x8b4b220, val=0, v=0x8b4b240) at kernel/sys.c:266 #6 0x080acf28 in panic (fmt=0x854eb55 "Operation too long") at kernel/panic.c:99 #7 0x080836f1 in cowify_req (req=0x92b07e0, bitmap=0xc800000, bitmap_offset=8192, bitmap_len=524289) at arch/um/drivers/ubd_kern.c:1037 #8 0x08083824 in prepare_request (req=0x92c06e0, io_req=0x92b07e0, offset=1145044992, page_offset=0, len=32768, page=0x16) at arch/um/drivers/ubd_kern.c:1076 #9 0x080838f2 in do_ubd_request (q=0x9754000) at arch/um/drivers/ubd_kern.c:1112 #10 0x08310157 in __generic_unplug_device (q=0x9754000) at block/ll_rw_blk.c:1597 #11 0x083101b7 in generic_unplug_device (q=0x9754000) at block/ll_rw_blk.c:1615 #12 0x0831021a in blk_backing_dev_unplug (bdi=0x9754090, page=0x98a8a40) at block/ll_rw_blk.c:1632 #13 0x081d4aaf in block_sync_page (page=0x16) at include/linux/blkdev.h:693 #14 0x0811bcb3 in sync_page (word=0x16) at mm/filemap.c:167 #15 0x084f6d74 in __wait_on_bit_lock (wq=0x9903078, q=0x9293d94, action=0x811bba0 , mode=2) at kernel/wait.c:195 #16 0x0811cfbb in __lock_page (page=0x98a8a40) at mm/filemap.c:571 #17 0x0811f7f3 in filemap_nopage (area=0x97d7268, address=1073938432, type=0x9293e30) at include/linux/pagemap.h:167 #18 0x08143389 in do_no_page (mm=0x9702600, vma=0x97d7268, address=1073939479, page_table=0x96c40c0, pmd=0x975a400, write_access=0) at mm/memory.c:2311 #19 0x08144413 in __handle_mm_fault (mm=0x9702600, vma=0x97d7268, address=1073939479, write_access=0) at mm/memory.c:2536 #20 0x0806c0a5 in handle_page_fault (address=1073939479, ip=0, is_write=0, is_user=1, code_out=0x9293edc) at include/linux/mm.h:777 #21 0x0806c823 in segv (fi={error_code = 4, cr2 = 1073939479, trap_no = 0}, ip=0, is_user=1, regs=0x0) at arch/um/kernel/trap.c:179 #22 0x08096bca in handle_segv (pid=14853, regs=0x99141bc) at arch/um/os-Linux/skas/process.c:137 #23 0x08097a74 in userspace (regs=0x99141bc) at arch/um/os-Linux/skas/process.c:327 #24 0x0806e191 in new_thread_handler () at arch/um/kernel/skas/process.c:68 #25 0x00000000 in ?? ()