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Alexey Dobriyan c43f89c208 fbdev: fix /proc/fb oops after module removal 
/proc/fb is not removed during rmmod.

Steps to reproduce:

	modprobe fb
	rmmod fb
	ls /proc

BUG: unable to handle kernel paging request at ffffffffa0094370
IP: [<ffffffff802b92a1>] proc_get_inode+0x101/0x130
PGD 203067 PUD 207063 PMD 17e758067 PTE 0
Oops: 0000 [1] SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:05:02.0/resource
CPU 1
Modules linked in: nf_conntrack_irc xt_state iptable_filter ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack ip_tables x_tables vfat fat usbhid ehci_hcd uhci_hcd usbcore sr_mod cdrom [last unloaded: fb]
Pid: 21205, comm: ls Not tainted 2.6.25-rc8-mm2 #14
RIP: 0010:[<ffffffff802b92a1>]  [<ffffffff802b92a1>] proc_get_inode+0x101/0x130
RSP: 0018:ffff81017c4bfc78  EFLAGS: 00010246
RAX: 0000000000008000 RBX: ffff8101787f5470 RCX: 0000000048011ccc
RDX: ffffffffa0094320 RSI: ffff810006ad43b0 RDI: ffff81017fc2cc00
RBP: ffff81017e450300 R08: 0000000000000002 R09: ffff81017c5d1000
R10: 0000000000000000 R11: 0000000000000246 R12: ffff81016b903a28
R13: ffff81017f822020 R14: ffff81017c4bfd58 R15: ffff81017f822020
FS:  00007f08e71696f0(0000) GS:ffff81017fc06480(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffffa0094370 CR3: 000000017e54a000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ls (pid: 21205, threadinfo ffff81017c4be000, task ffff81017de48770)
Stack:  ffff81017c5d1000 00000000ffffffea ffff81017e450300 ffffffff802bdd1e
 ffff81017f802258 ffff81017c4bfe48 ffff81016b903a28 ffff81017f822020
 ffff81017c4bfd48 ffffffff802b9ba0 ffff81016b903a28 ffff81017f802258
Call Trace:
 [<ffffffff802bdd1e>] ? proc_lookup_de+0x8e/0x100
 [<ffffffff802b9ba0>] ? proc_root_lookup+0x20/0x60
 [<ffffffff802882a7>] ? do_lookup+0x1b7/0x210
 [<ffffffff8028883d>] ? __link_path_walk+0x53d/0x7f0
 [<ffffffff80295eb8>] ? mntput_no_expire+0x28/0x130
 [<ffffffff80288b4a>] ? path_walk+0x5a/0xc0
 [<ffffffff80288dd3>] ? do_path_lookup+0x83/0x1c0
 [<ffffffff80287785>] ? getname+0xe5/0x210
 [<ffffffff80289adb>] ? __user_walk_fd+0x4b/0x80
 [<ffffffff8028236c>] ? vfs_lstat_fd+0x2c/0x70
 [<ffffffff8028bf1e>] ? filldir+0xae/0xf0
 [<ffffffff802b92e9>] ? de_put+0x9/0x50
 [<ffffffff8029633d>] ? mnt_want_write+0x2d/0x80
 [<ffffffff8029339f>] ? touch_atime+0x1f/0x170
 [<ffffffff802b9b1d>] ? proc_root_readdir+0x7d/0xa0
 [<ffffffff802825e7>] ? sys_newlstat+0x27/0x50
 [<ffffffff8028bffb>] ? vfs_readdir+0x9b/0xd0
 [<ffffffff8028c0fe>] ? sys_getdents+0xce/0xe0
 [<ffffffff8020b39b>] ? system_call_after_swapgs+0x7b/0x80

Code: b7 83 b2 00 00 00 25 00 f0 00 00 3d 00 80 00 00 74 19 48 89 93 f0 00 00 00 48 89 df e8 39 9a fd ff 48 89 d8 48 83 c4 08 5b 5d c3 <48> 83 7a 50 00 48 c7 c0 60 16 45 80 48 c7 c2 40 17 45 80 48 0f
RIP  [<ffffffff802b92a1>] proc_get_inode+0x101/0x130
 RSP <ffff81017c4bfc78>
CR2: ffffffffa0094370
---[ end trace c71hiarjan8ab739 ]---

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
"Antonino A. Daplas" <adaplas@pol.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-04-15 19:35:40 -07:00
..
acorn/char
…
acpi acpi: fix "buggy BIOS check" when CPUs are hot removed 2008-04-08 18:25:53 -07:00
amba
…
ata [libata] make ali_atapi_dma static 2008-04-12 00:16:49 -04:00
atm [ATM] drivers/atm/iphase.c: compilation warning fix 2008-04-02 00:03:00 -07:00
auxdisplay
…
base driver core: fix small mem leak in driver_add_kobj() 2008-03-28 14:45:23 -07:00
block cciss: error: implicit declaration of function 'sg_init_table' 2008-04-11 08:06:44 -07:00
bluetooth
…
cdrom
…
char fix IS_I9XX macro in i915 DRM driver 2008-04-06 16:10:40 -07:00
clocksource
…
connector
…
cpufreq
…
cpuidle
…
crypto drivers/crypto/hifn_795x.c trivial endianness annotations 2008-03-30 14:20:24 -07:00
dca
…
dio
…
dma [POWERPC] fsldma: Use compatiable binding as spec 2008-03-31 11:45:41 -05:00
edac
…
eisa
…
firewire firewire: fw-ohci: plug dma memory leak in AR handler 2008-03-27 21:01:14 +01:00
firmware ipmi: change device node ordering to reflect probe order 2008-04-04 14:46:26 -07:00
gpio
…
hid
…
hwmon hwmon: (w83781d) Fix I/O resource conflict with PNP 2008-03-27 08:40:41 -04:00
i2c i2c-tiny-usb: New VID/PID pair 2008-04-11 12:07:05 +02:00
ide siimage: fix kernel oops on PPC 44x 2008-04-07 23:30:10 +02:00
ieee1394
…
infiniband trivial endianness annotations: infiniband core 2008-03-30 14:20:24 -07:00
input Input: appletouch - add product IDs for the 4th generation MacBooks 2008-04-02 10:14:29 -04:00
isdn [ISDN]: Do not validate ISDN net device address prior to interface-up 2008-04-13 22:44:20 -07:00
leds leds: fix platform driver hotplug/coldplug 2008-04-15 19:35:40 -07:00
lguest misc __user misannotations (pointless casts to long) 2008-03-30 14:20:23 -07:00
macintosh
…
mca
…
md md: close a livelock window in handle_parity_checks5 2008-04-11 08:06:44 -07:00
media pvrusb2: fix broken build due to patch order dependency 2008-04-07 19:14:34 -07:00
memstick memstick: suppress uninitialized-var warning 2008-03-28 14:45:23 -07:00
message
…
mfd mfd/asic3: ioread/iowrite take pointer, not unsigned long 2008-03-30 14:20:24 -07:00
misc NULL noise: drivers/misc 2008-03-30 14:18:41 -07:00
mmc mmc: fix platform driver hotplug/coldplug 2008-04-15 19:35:40 -07:00
mtd mtd/chips: add missing set_current_state() to cfi_{amdstd,staa}_sync() 2008-04-08 18:25:53 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-04-14 07:56:24 -07:00
nubus
…
of
…
oprofile
…
parisc
…
parport parport_pc: make sure to release IO ports after probing for IT87XX 2008-04-04 14:30:31 -07:00
pci pci: revert SMBus unhide on HP Compaq nx6110 2008-03-28 14:45:22 -07:00
pcmcia
…
pnp
…
power
…
ps3
…
rapidio
…
rtc rtc: fix the error in the function of cmos_set_alarm 2008-04-15 19:35:40 -07:00
s390
…
sbus
…
scsi scsi: fix sense_slab/bio swapping livelock 2008-04-06 16:10:08 -07:00
serial atmel_serial: fix uart/console concurrent access 2008-04-02 15:28:19 -07:00
sh
…
sn
…
spi spi: fix platform driver hotplug/coldplug 2008-04-11 08:06:43 -07:00
ssb ssb-mipscore: Fix interrupt vectors 2008-04-09 10:33:49 -04:00
tc
…
telephony
…
thermal
…
uio
…
usb usb host: fix platform driver hotplug/coldplug 2008-04-11 08:06:44 -07:00
video fbdev: fix /proc/fb oops after module removal 2008-04-15 19:35:40 -07:00
virtio virtio: remove overzealous BUG_ON. 2008-04-07 13:14:22 -07:00
w1
…
watchdog watchdog: fix platform driver hotplug/coldplug 2008-04-11 08:06:44 -07:00
xen xen: fix grant table bug 2008-04-04 18:36:46 +02:00
zorro
…
Kconfig
…
Makefile
…