-or- it uncovers a bug in kernel v3.15-rc3 for UML:
commit 23dc478aba4134db51584d19e4783ec87ce87b88
Author: Dave Jones <da...@redhat.com>
Date: Tue Apr 29 16:42:45 2014 -0400
non-biarch arches aren't necessarily 32-bit.
diff --git a/children/random-syscalls.c b/children/random-syscalls.c
index 82e49f5..1d7e7ce 100644
--- a/children/random-syscalls.c
+++ b/children/random-syscalls.c
@@ -32,7 +32,6 @@ static bool choose_syscall_table(void)
if (biarch == FALSE) {
active_syscalls = shm->active_syscalls;
- do32 = TRUE;
} else {
/* First, check that we have syscalls enabled in either table.
*/
I do get :
Kernel panic - not syncing: do_syscall_stub : PTRACE_SETREGS failed, errno = 3
CPU: 0 PID: 1303 Comm: trinity-c0 Not tainted 3.15.0-rc3 #1
Stack:
085a4f54 085a4f54 4841fc48 00000004 086c8547 00002b58 00000003 00000011
4841fc58 084eae75 00000000 00000000 4841fc80 084e72e0 085b08e8 08700960
085ad7b4 4841fc90 00000000 00002b58 00000003 00000011 4841fcb4 080734c5
Call Trace:
[<080734c5>] ? run_syscall_stub+0x125/0x2c0
[<084eae75>] dump_stack+0x26/0x28
[<084e72e0>] panic+0x7a/0x194
[<080734c5>] run_syscall_stub+0x125/0x2c0
[<08073b15>] unmap+0xf5/0x110
[<08061047>] do_ops+0xb7/0x160
[<080615f8>] fix_range_common+0x448/0x480
[<080e50f4>] ? vma_interval_tree_insert+0x74/0x80
[<0806193e>] flush_tlb_range+0x3e/0x40
[<080f045e>] move_page_tables+0x24e/0x280
[<080f0577>] move_vma+0xe7/0x230
[<080eda20>] ? get_unmapped_area+0xa0/0xc0
[<080f08b8>] SyS_mremap+0x1f8/0x4c0
[<08062ab4>] handle_syscall+0x64/0x80
[<0849d4f1>] ? ptrace+0x31/0x80
[<080797a2>] ? get_fp_registers+0x22/0x40
[<08074815>] userspace+0x475/0x5f0
[<0849d4f1>] ? ptrace+0x31/0x80
[<08079d06>] ? os_set_thread_area+0x26/0x40
[<08078cd0>] ? do_set_thread_area+0x20/0x50
[<08078e48>] ? arch_switch_tls+0xb8/0x100
[<0805f770>] fork_handler+0x60/0x70
/home/tfoerste/workspace/bin/start_uml.sh: line 110: 9558 Aborted
(core dumped) $LINUX earlyprintk ubda=$ROOTFS ubdb=$SWAP eth0=$NET mem=$MEM
$TTY umid=uml_$NAME rootfstype=ext4 "$ARGS"
--
Toralf
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