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Paul Fulghum da965822ab [PATCH] tty reference count fix 
Fix hole where tty structure can be released when reference count is non
zero.  Existing code can sleep without tty_sem protection between deciding
to release the tty structure (setting local variables tty_closing and
otty_closing) and setting TTY_CLOSING to prevent further opens.  An open
can occur during this interval causing release_dev() to free the tty
structure while it is still referenced.

This should fix bugzilla.kernel.org [Bug 6041] New: Unable to handle kernel
paging request

In Bug 6041, tty_open() oopes on accessing the tty structure it has
successfully claimed.  Bug was on SMP machine with the same tty being
opened and closed by multiple processes, and DEBUG_PAGEALLOC enabled.

Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2006-02-14 16:09:33 -08:00
..
acorn [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
acpi [PATCH] x86_64: data/functions wrongly marked as __init with cpu hotplug. 2006-02-04 16:43:14 -08:00
amba [ARM] Remove asm/irq.h includes from ARM drivers 2006-01-09 13:56:42 +00:00
atm [ATM]: Remove unneeded kmalloc() return value casts + tiny whitespace cleanup 2006-01-10 13:09:01 -08:00
base [PATCH] fix __user annotations in drivers/base/memory.c 2006-02-07 20:58:04 -05:00
block [PATCH] pktcdvd: Reduce stack usage 2006-02-14 16:09:33 -08:00
bluetooth [Bluetooth] Fix firmware loading problem of BT3C driver 2006-02-13 11:40:07 +01:00
cdrom [PATCH] remove bogus asm/bug.h includes. 2006-02-07 20:56:35 -05:00
char [PATCH] tty reference count fix 2006-02-14 16:09:33 -08:00
connector [PATCH] Switch getnstimestamp() calls to ktime_get_ts() 2006-01-10 08:01:39 -08:00
cpufreq [CPUFREQ] Whitespace/CodingStyle cleanups 2006-02-02 17:03:42 -05:00
crypto [CRYPTO] Allow AES C/ASM implementations to coexist 2006-01-09 14:15:39 -08:00
dio [PATCH] Add dio_bus_type probe and remove methods 2006-01-13 11:26:07 -08:00
edac [PATCH] drivers/edac/i82875p_edac.c __user annotations 2006-02-07 20:58:09 -05:00
eisa
…
fc4
…
firmware [PATCH] dell_rbu: fix Bug 5854 2006-01-14 18:27:13 -08:00
hwmon [PATCH] it87: Fix oops on removal 2006-02-13 22:30:10 -08:00
i2c [PATCH] i2c: Drop outdated probe/remove code in i2c-isa 2006-02-13 22:30:10 -08:00
ide [PATCH] ide: cast arguments to pr_debug() properly 2006-02-07 16:12:31 -08:00
ieee1394 Actually remove amdtp.[ch], cmp.[ch]. 2006-01-16 19:21:57 -05:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2006-02-14 13:49:37 -08:00
input Merge master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2006-01-31 21:18:17 -08:00
isdn [PATCH] mark HISAX_AMD7930 as broken 2006-02-08 01:05:34 -05:00
macintosh ppc: fix up trivial Kconfig config selection 2006-02-08 07:51:17 -08:00
mca
…
md [PATCH] md: Make sure rdev->size gets set for version-1 superblocks 2006-02-03 08:32:00 -08:00
media [PATCH] drivers/media/video __user annotations and fixes 2006-02-08 01:03:39 -05:00
message [PATCH] Fix i2o_scsi oops on abort 2006-02-05 11:06:51 -08:00
mfd [PATCH] Add MCP bus_type probe and remove methods 2006-01-13 11:26:08 -08:00
misc [SERIAL] Remove UPF_AUTOPROBE and UPF_BOOT_ONLYMCA 2006-01-21 20:06:14 +00:00
mmc [MMC] Remove extra character in AU1XXX MMC Kconfig entry 2006-02-08 22:23:05 +00:00
mtd [PATCH] arm: fix dependencies for MTD_XIP 2006-02-08 01:02:58 -05:00
net [APPLETALK]: warning fix 2006-02-13 15:53:41 -08:00
nubus
…
oprofile [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
parisc [PARISC] Convert sba_iommu.c to use seq_file 2006-02-08 22:56:22 -05:00
parport Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6 2006-02-03 18:17:47 -08:00
pci [PATCH] PowerPC/PCI Hotplug build break 2006-02-01 16:35:29 -08:00
pcmcia [PATCH] Add pcmcia_bus_type probe and remove methods 2006-01-13 11:26:08 -08:00
pnp Merge git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa 2006-02-01 22:08:23 -08:00
rapidio [PATCH] Add rio_bus_type probe and remove methods 2006-01-13 11:26:10 -08:00
s390 [PATCH] s390: fix sclp memory corruption in tty pages list 2006-02-11 21:41:12 -08:00
sbus [PATCH] remove unused tmp_buf_sem's 2006-01-14 10:41:42 -08:00
scsi Merge branch 'upstream-fixes' 2006-02-09 04:29:00 -05:00
serial [SERIAL] Remove incorrect code from ioc4 serial driver 2006-02-10 21:50:43 +00:00
sh [PATCH] Add superhyway_bus_type probe and remove methods 2006-01-13 11:26:09 -08:00
sn [PATCH] sn3 iomem annotations and fixes 2006-02-08 01:03:52 -05:00
spi [PATCH] SPI: spi_butterfly, restore lost deltas 2006-02-06 12:17:17 -08:00
tc [PATCH] remove bogus asm/bug.h includes. 2006-02-07 20:56:35 -05:00
telephony [PATCH] ixj: fix writing silence check 2006-02-03 08:32:08 -08:00
usb [PATCH] USB: unusual-devs bugfix 2006-02-13 21:33:40 -08:00
video [PATCH] fbdev: video_setup() warning fix 2006-02-11 21:41:13 -08:00
w1 spelling: s/usefull/useful/ 2006-01-10 00:08:17 +01:00
zorro [PATCH] Add zorro_bus_type probe and remove methods 2006-01-13 11:26:10 -08:00
Kconfig [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
Makefile [PATCH] drivers/sn/ must be entered for CONFIG_SGI_IOC3 2006-01-26 13:22:03 -08:00