The patch titled
fix up lockdep trace in fs/exec.c
has been added to the -mm tree. Its filename is
fix-up-lockdep-trace-in-fs-execc.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: fix up lockdep trace in fs/exec.c
From: Dave Jones <davej@xxxxxxxxxx>
=============================================
[ INFO: possible recursive locking detected ]
---------------------------------------------
init/1 is trying to acquire lock:
(&sighand->siglock){....}, at: [<c047a78a>] flush_old_exec+0x3ae/0x859
but task is already holding lock:
(&sighand->siglock){....}, at: [<c047a77a>] flush_old_exec+0x39e/0x859
other info that might help us debug this:
2 locks held by init/1:
#0: (tasklist_lock){..--}, at: [<c047a76a>] flush_old_exec+0x38e/0x859
#1: (&sighand->siglock){....}, at: [<c047a77a>] flush_old_exec+0x39e/0x859
stack backtrace:
[<c04051e1>] show_trace_log_lvl+0x54/0xfd
[<c040579d>] show_trace+0xd/0x10
[<c04058b6>] dump_stack+0x19/0x1b
[<c043b33a>] __lock_acquire+0x773/0x997
[<c043bacf>] lock_acquire+0x4b/0x6c
[<c060630b>] _spin_lock+0x19/0x28
[<c047a78a>] flush_old_exec+0x3ae/0x859
[<c0498053>] load_elf_binary+0x4aa/0x1628
[<c0479cab>] search_binary_handler+0xa7/0x24e
[<c047b577>] do_execve+0x15b/0x1f9
[<c04022b4>] sys_execve+0x29/0x4d
[<c0403faf>] syscall_call+0x7/0xb
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxx>
Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/exec.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/exec.c~fix-up-lockdep-trace-in-fs-execc fs/exec.c
--- a/fs/exec.c~fix-up-lockdep-trace-in-fs-execc
+++ a/fs/exec.c
@@ -748,7 +748,7 @@ no_thread_group:
write_lock_irq(&tasklist_lock);
spin_lock(&oldsighand->siglock);
- spin_lock(&newsighand->siglock);
+ spin_lock_nested(&newsighand->siglock, SINGLE_DEPTH_NESTING);
rcu_assign_pointer(tsk->sighand, newsighand);
recalc_sigpending();
_
Patches currently in -mm which might be from davej@xxxxxxxxxx are
git-agpgart.patch
git-cpufreq.patch
remove-null-chars-from-dvb-names.patch
remove-silly-messages-from-input-layer.patch
via-sata-oops-on-init.patch
tickle-nmi-watchdog-on-serial-output.patch
git-scsi-misc.patch
git-watchdog.patch
debug-variants-of-linked-list-macros.patch
tty_ioc-keep-davej-sane.patch
single-bit-flip-detector.patch
single-bit-flip-detector-tidy.patch
lockdep-print-kernel-version.patch
remove-another-configh.patch
fix-up-lockdep-trace-in-fs-execc.patch
sched-dont-print-migration-cost-when-only-1-cpu.patch
fbcon-use-persistent-allocation-for-cursor-blinking.patch
post-halloween-doc.patch
-
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