The patch titled
uml: Improve SIGBUS diagnostics
has been removed from the -mm tree. Its filename is
uml-improve-sigbus-diagnostics.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: uml: Improve SIGBUS diagnostics
From: Jeff Dike <jdike@xxxxxxxxxxx>
UML can get a SIGBUS anywhere if the tmpfs mount being used for its memory
runs out of space. This patch adds a printk before the panic to provide a
clue as to what likely went wrong.
Signed-off-by: Jeff Dike <jdike@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/um/kernel/trap.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff -puN arch/um/kernel/trap.c~uml-improve-sigbus-diagnostics arch/um/kernel/trap.c
--- a/arch/um/kernel/trap.c~uml-improve-sigbus-diagnostics
+++ a/arch/um/kernel/trap.c
@@ -227,9 +227,16 @@ void bad_segv(struct faultinfo fi, unsig
void relay_signal(int sig, union uml_pt_regs *regs)
{
- if(arch_handle_signal(sig, regs)) return;
- if(!UPT_IS_USER(regs))
+ if(arch_handle_signal(sig, regs))
+ return;
+
+ if(!UPT_IS_USER(regs)){
+ if(sig == SIGBUS)
+ printk("Bus error - the /dev/shm or /tmp mount likely "
+ "just ran out of space\n");
panic("Kernel mode signal %d", sig);
+ }
+
current->thread.arch.faultinfo = *UPT_FAULTINFO(regs);
force_sig(sig, current);
}
_
Patches currently in -mm which might be from jdike@xxxxxxxxxxx are
origin.patch
uml-use-mcmodel=kernel-for-x86_64.patch
uml-fix-proc-vs-interrupt-context-spinlock-deadlock.patch
uml-const-more-data.patch
uml-get-rid-of-zone_dma-use.patch
uml-fix-missing-x86_64-register-definitions.patch
uml-fix-gcov-support.patch
uml-use-correct-sigbus-handler.patch
uml-add-checkstack-support.patch
uml-mark-some-tt-mode-code.patch
uml-thread-creation-tidying.patch
uml-file-renaming.patch
uml-add-an-export.patch
uml-fix-sleep-length-bug.patch
uml-fix-allocation-size.patch
uml-remove-pte_mkexec.patch
simplify-update_times-avoid-jiffies-jiffies_64-aliasing-problem-2.patch
kill-wall_jiffies.patch
const-struct-tty_operations.patch
namespaces-utsname-switch-to-using-uts-namespaces.patch
introduce-kernel_execve.patch
rename-the-provided-execve-functions-to-kernel_execve.patch
provide-kernel_execve-on-all-architectures.patch
provide-kernel_execve-on-all-architectures-fix.patch
remove-the-use-of-_syscallx-macros-in-uml.patch
sh64-remove-the-use-of-kernel-syscalls.patch
remove-remaining-errno-and-__kernel_syscalls__-references.patch
-
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