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authorBernhard Walle <bwalle@suse.de>2007-03-16 13:38:30 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-16 19:25:06 -0700
commitc2c88f109eebb940ddca17472d2e149560bcf7eb (patch)
treecc5ad7b6f558cbb9157a9924d1c05c47957da385
parent7a5e6bc29aca331267dfc9f49129b9432ac84d70 (diff)
[PATCH] Initialise SAK member for each virtual console to prevent oops
Initialise the SAK member of the vc_cons variable on all virtual terminals, not only the first one. This prevents an oops when trying Sysrq-C on e.g. the second virtual terminal: kernel BUG at kernel/workqueue.c:212! invalid opcode: 0000 [1] SMP CPU 0 Modules linked in: i915 drm deflate zlib_deflate twofish twofish_common serpent blowfish des ce Pid: 0, comm: swapper Not tainted 2.6.21-rc3-default #15 RIP: 0010:[<ffffffff8028c955>] [<ffffffff8028c955>] queue_work+0x32/0x51 RSP: 0018:ffffffff805fada8 EFLAGS: 00010013 RAX: ffffffff80683f38 RBX: ffffffff804ae700 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff80683f30 RDI: ffff81000134a840 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000002 R10: ffffffff805990e0 R11: ffff810037f4c0f0 R12: 000000000000006b R13: ffff81007aa23000 R14: 0000000000000001 R15: 0000000000000096 FS: 0000000000000000(0000) GS:ffffffff804d8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00002b72026e9000 CR3: 0000000079175000 CR4: 00000000000006e0 Process swapper (pid: 0, threadinfo ffffffff8059e000, task ffffffff80490840) Stack: 0000000000000096 ffffffff803635db ffffffff805fadf8 0000000000000001 ffff8100013c2e40 0000000000000025 ffff81007c931c00 ffff81007aa23000 0000000000000001 ffffffff8035e3ee 0000000000000092 ffff810037cc8000 Call Trace: <IRQ> [<ffffffff803635db>] __handle_sysrq+0x98/0x129 [<ffffffff8035e3ee>] kbd_event+0x32e/0x56a [<ffffffff8037d502>] input_event+0x422/0x44a [<ffffffff80381d71>] atkbd_interrupt+0x449/0x503 [<ffffffff8037a42d>] serio_interrupt+0x37/0x6f [<ffffffff8037affb>] i8042_interrupt+0x1f4/0x20a [<ffffffff8026bd20>] smp_send_timer_broadcast_ipi+0x2d/0x4e [<ffffffff8020eee5>] handle_IRQ_event+0x25/0x53 [<ffffffff802a924c>] handle_edge_irq+0xe4/0x128 [<ffffffff802562ac>] call_softirq+0x1c/0x28 [<ffffffff802632eb>] do_IRQ+0x6c/0xd3 [<ffffffff8024f4e7>] mwait_idle+0x0/0x45 [<ffffffff80255631>] ret_from_intr+0x0/0xa <EOI> [<ffffffff80248a4d>] datagram_poll+0x0/0xc8 [<ffffffff8024f529>] mwait_idle+0x42/0x45 [<ffffffff80242c05>] cpu_idle+0x8b/0xae [<ffffffff805a8779>] start_kernel+0x2b9/0x2c5 [<ffffffff805a815e>] _sinittext+0x15e/0x162 Code: 0f 0b eb fe 48 8b 07 48 63 d2 48 f7 d0 48 8b 3c d0 e8 13 ff RIP [<ffffffff8028c955>] queue_work+0x32/0x51 RSP <ffffffff805fada8> Kernel panic - not syncing: Aiee, killing interrupt handler! Signed-off-by: Bernhard Walle <bwalle@suse.de> Acked-by: Eric Biederman <ebiederm@xmission.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/char/vt.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0fefe2a2805..1bbb45b937f 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -724,6 +724,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
return -ENOMEM;
memset(vc, 0, sizeof(*vc));
vc_cons[currcons].d = vc;
+ INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
visual_init(vc, currcons, 1);
if (!*vc->vc_uni_pagedir_loc)
con_set_default_unimap(vc);