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Alexey Dobriyan ca509f69de Protect tty drivers list with tty_mutex 
Additions and removal from tty_drivers list were just done as well as
iterating on it for /proc/tty/drivers generation.

testing: modprobe/rmmod loop of simple module which does nothing but
tty_register_driver() vs cat /proc/tty/drivers loop

BUG: unable to handle kernel paging request at virtual address 6b6b6b6b
 printing eip:
c01cefa7
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
last sysfs file: devices/pci0000:00/0000:00:1d.7/usb5/5-0:1.0/bInterfaceProtocol
Modules linked in: ohci_hcd af_packet e1000 ehci_hcd uhci_hcd usbcore xfs
CPU:    0
EIP:    0060:[<c01cefa7>]    Not tainted VLI
EFLAGS: 00010297   (2.6.21-rc4-mm1 #4)
EIP is at vsnprintf+0x3a4/0x5fc
eax: 6b6b6b6b   ebx: f6cb50f2   ecx: 6b6b6b6b   edx: fffffffe
esi: c0354700   edi: f6cb6000   ebp: 6b6b6b6b   esp: f31f5e68
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process cat (pid: 31864, ti=f31f4000 task=c1998030 task.ti=f31f4000)
Stack: 00000000 c0103f20 c013003a c0103f20 00000000 f6cb50da 0000000a 00000f0e
       f6cb50f2 00000010 00000014 ffffffff ffffffff 00000007 c0354753 f6cb50f2
       f73e39dc f73e39dc 00000001 c0175416 f31f5ed8 f31f5ed4 0ee00000 f32090bc
Call Trace:
 [<c0103f20>] restore_nocheck+0x12/0x15
 [<c013003a>] mark_held_locks+0x6d/0x86
 [<c0103f20>] restore_nocheck+0x12/0x15
 [<c0175416>] seq_printf+0x2e/0x52
 [<c0192895>] show_tty_range+0x35/0x1f3
 [<c0175416>] seq_printf+0x2e/0x52
 [<c0192add>] show_tty_driver+0x8a/0x1d9
 [<c01758f6>] seq_read+0x70/0x2ba
 [<c0175886>] seq_read+0x0/0x2ba
 [<c018d8e6>] proc_reg_read+0x63/0x9f
 [<c015e764>] vfs_read+0x7d/0xb5
 [<c018d883>] proc_reg_read+0x0/0x9f
 [<c015eab1>] sys_read+0x41/0x6a
 [<c0103e4e>] sysenter_past_esp+0x5f/0x99
 =======================
Code: 00 8b 4d 04 e9 44 ff ff ff 8d 4d 04 89 4c 24 50 8b 6d 00 81 fd ff 0f 00 00 b8 a4 c1 35 c0 0f 46 e8 8b 54 24 2c 89 e9 89 c8 eb 06 <80> 38 00 74 07 40 4a 83 fa ff 75 f4 29 c8 89 c6 8b 44 24 28 89
EIP: [<c01cefa7>] vsnprintf+0x3a4/0x5fc SS:ESP 0068:f31f5e68

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2007-05-08 11:15:05 -07:00
..
acorn
…
acpi Fix section mismatch of memory hotplug related code. 2007-05-08 11:14:57 -07:00
amba
…
ata Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-06 13:20:10 -07:00
atm PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
auxdisplay
…
base Introduce CONFIG_HAS_DMA 2007-05-07 12:12:51 -07:00
block floppy: handle device_create_file() failure while init 2007-05-08 11:15:02 -07:00
bluetooth [Bluetooth] Correct SCO buffer for another Broadcom based dongle 2007-05-05 00:36:22 +02:00
cdrom mm: remove destroy_dirty_buffers from invalidate_bdev() 2007-05-07 12:12:55 -07:00
char Protect tty drivers list with tty_mutex 2007-05-08 11:15:05 -07:00
clocksource
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connector
…
cpufreq
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crypto [CRYPTO] padlock: Remove pointless padlock module 2007-05-02 22:08:26 +10:00
dio
…
dma
…
edac
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eisa virtual_eisa_root_init() should be __init 2007-05-08 11:15:02 -07:00
fc4
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firmware remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-04-30 08:58:21 -07:00
hwmon Apple SMC driver (hardware monitoring and control) 2007-05-08 11:15:00 -07:00
i2c remove software_suspend() 2007-05-07 12:12:59 -07:00
ide ide-cs: recognize 2GB CompactFlash from Transcend 2007-05-05 22:03:51 +02:00
ieee1394 PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
infiniband Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband 2007-05-07 12:18:21 -07:00
input sh: hp6xx driver compile fixes. 2007-05-07 02:10:54 +00:00
isdn PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
kvm KVM: Remove unused 'instruction_length' 2007-05-03 10:52:32 +03:00
leds
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macintosh CUDA ADB fixes 2007-05-04 17:59:07 -07:00
mca
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md Remove do_sync_file_range() 2007-05-08 11:15:04 -07:00
media cx88-video build fix 2007-05-07 12:13:04 -07:00
message remove unused header file: drivers/message/i2o/i2o_lan.h 2007-05-08 11:15:02 -07:00
mfd
…
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2007-05-04 21:44:34 -07:00
mmc Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-06 13:20:10 -07:00
mtd slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
net Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-05-07 12:23:31 -07:00
nubus
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oprofile
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parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-05-04 19:36:58 -07:00
parport
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pci Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-05-04 18:04:48 -07:00
pcmcia add new_id to PCMCIA drivers 2007-05-07 12:12:50 -07:00
pnp init dma masks in pnp_dev 2007-05-08 11:15:00 -07:00
ps3 ps3av: Use __func__ instead of __FUNCTION__ 2007-05-04 17:59:09 -07:00
rapidio
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rtc rtc: add RTC class driver for the Maxim MAX6900 2007-05-08 11:15:03 -07:00
s390 Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-05-05 13:30:44 -07:00
sbus PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
scsi [SCSI] esp_scsi: Fix section mismatch warnings. 2007-05-07 14:05:03 -07:00
serial Subject: jsm driver fix for linuxpps support 2007-05-08 11:15:03 -07:00
sh
…
sn
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spi spi_s3c24xx.c: Fix build 2007-05-07 12:13:04 -07:00
tc
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telephony replace pci_find_device in drivers/telephony/ixj.c 2007-05-08 11:15:02 -07:00
usb ehci-ps3, ohci-ps3: fix compilation 2007-05-07 12:13:04 -07:00
video [VIDEO] sunxvr2500: Fix PCI device ID table. 2007-05-07 14:02:51 -07:00
w1
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zorro Amiga Zorro bus: kill resource_size_t warnings 2007-05-04 17:59:08 -07:00
Kconfig
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Makefile i2c: Add i2c_board_info and i2c_new_device() 2007-05-01 23:26:31 +02:00