From c2c88f109eebb940ddca17472d2e149560bcf7eb Mon Sep 17 00:00:00 2001 From: Bernhard Walle Date: Fri, 16 Mar 2007 13:38:30 -0800 Subject: [PATCH] [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:[] [] 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: [] __handle_sysrq+0x98/0x129 [] kbd_event+0x32e/0x56a [] input_event+0x422/0x44a [] atkbd_interrupt+0x449/0x503 [] serio_interrupt+0x37/0x6f [] i8042_interrupt+0x1f4/0x20a [] smp_send_timer_broadcast_ipi+0x2d/0x4e [] handle_IRQ_event+0x25/0x53 [] handle_edge_irq+0xe4/0x128 [] call_softirq+0x1c/0x28 [] do_IRQ+0x6c/0xd3 [] mwait_idle+0x0/0x45 [] ret_from_intr+0x0/0xa [] datagram_poll+0x0/0xc8 [] mwait_idle+0x42/0x45 [] cpu_idle+0x8b/0xae [] start_kernel+0x2b9/0x2c5 [] _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 [] queue_work+0x32/0x51 RSP Kernel panic - not syncing: Aiee, killing interrupt handler! Signed-off-by: Bernhard Walle Acked-by: Eric Biederman Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/vt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/char/vt.c b/drivers/char/vt.c index 0fefe2a28055..1bbb45b937fd 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); -- 2.20.1