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linux-sg2042
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nixiaoming c79dde629d tty fix oops when rmmod 8250 
After rmmod 8250.ko
tty_kref_put starts kwork (release_one_tty) to release proc interface
oops when accessing driver->driver_name in proc_tty_unregister_driver

Use jprobe, found driver->driver_name point to 8250.ko
static static struct uart_driver serial8250_reg
.driver_name= serial,

Use name in proc_dir_entry instead of driver->driver_name to fix oops

test on linux 4.1.12:

BUG: unable to handle kernel paging request at ffffffffa01979de
IP: [<ffffffff81310f40>] strchr+0x0/0x30
PGD 1a0d067 PUD 1a0e063 PMD 851c1f067 PTE 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: ... ...  [last unloaded: 8250]
CPU: 7 PID: 116 Comm: kworker/7:1 Tainted: G           O    4.1.12 #1
Hardware name: Insyde RiverForest/Type2 - Board Product Name1, BIOS NE5KV904 12/21/2015
Workqueue: events release_one_tty
task: ffff88085b684960 ti: ffff880852884000 task.ti: ffff880852884000
RIP: 0010:[<ffffffff81310f40>]  [<ffffffff81310f40>] strchr+0x0/0x30
RSP: 0018:ffff880852887c90  EFLAGS: 00010282
RAX: ffffffff81a5eca0 RBX: ffffffffa01979de RCX: 0000000000000004
RDX: ffff880852887d10 RSI: 000000000000002f RDI: ffffffffa01979de
RBP: ffff880852887cd8 R08: 0000000000000000 R09: ffff88085f5d94d0
R10: 0000000000000195 R11: 0000000000000000 R12: ffffffffa01979de
R13: ffff880852887d00 R14: ffffffffa01979de R15: ffff88085f02e840
FS:  0000000000000000(0000) GS:ffff88085f5c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa01979de CR3: 0000000001a0c000 CR4: 00000000001406e0
Stack:
 ffffffff812349b1 ffff880852887cb8 ffff880852887d10 ffff88085f5cd6c2
 ffff880852800a80 ffffffffa01979de ffff880852800a84 0000000000000010
 ffff88085bb28bd8 ffff880852887d38 ffffffff812354f0 ffff880852887d08
Call Trace:
 [<ffffffff812349b1>] ? __xlate_proc_name+0x71/0xd0
 [<ffffffff812354f0>] remove_proc_entry+0x40/0x180
 [<ffffffff815f6811>] ? _raw_spin_lock_irqsave+0x41/0x60
 [<ffffffff813be520>] ? destruct_tty_driver+0x60/0xe0
 [<ffffffff81237c68>] proc_tty_unregister_driver+0x28/0x40
 [<ffffffff813be548>] destruct_tty_driver+0x88/0xe0
 [<ffffffff813be5bd>] tty_driver_kref_put+0x1d/0x20
 [<ffffffff813becca>] release_one_tty+0x5a/0xd0
 [<ffffffff81074159>] process_one_work+0x139/0x420
 [<ffffffff810745a1>] worker_thread+0x121/0x450
 [<ffffffff81074480>] ? process_scheduled_works+0x40/0x40
 [<ffffffff8107a16c>] kthread+0xec/0x110
 [<ffffffff81080000>] ? tg_rt_schedulable+0x210/0x220
 [<ffffffff8107a080>] ? kthread_freezable_should_stop+0x80/0x80
 [<ffffffff815f7292>] ret_from_fork+0x42/0x70
 [<ffffffff8107a080>] ? kthread_freezable_should_stop+0x80/0x80

Signed-off-by: nixiaoming <nixiaoming@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2017-10-20 14:06:45 +02:00
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9p
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adfs
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affs
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afs
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autofs4
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befs
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bfs
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btrfs Merge branch 'for-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-10-06 09:03:08 -07:00
cachefiles
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ceph ceph: fix __choose_mds() for LSSNAP request 2017-10-02 16:18:16 +02:00
cifs SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags 2017-09-22 19:47:17 -05:00
coda
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configfs
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cramfs
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crypto
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debugfs
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devpts
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dlm
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ecryptfs
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efivarfs
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efs
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exofs
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exportfs
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ext2
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ext4
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f2fs
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fat
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freevxfs
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fscache
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fuse
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gfs2 GFS2: Fix an old regression in GFS2's debugfs interface 2017-09-25 15:41:56 -07:00
hfs
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hfsplus
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hostfs
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hpfs
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hugetlbfs
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isofs isofs: fix build regression 2017-09-18 12:24:26 +02:00
jbd2
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jffs2
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jfs
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kernfs
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lockd
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minix
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ncpfs
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nfs NFS client bugfixes for Linux 4.14 2017-09-14 20:04:32 -07:00
nfs_common
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nfsd
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nilfs2
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nls
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notify
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ntfs
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ocfs2
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omfs
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openpromfs
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orangefs
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overlayfs ovl: fix regression caused by exclusive upper/work dir protection 2017-10-05 15:53:18 +02:00
proc tty fix oops when rmmod 8250 2017-10-20 14:06:45 +02:00
pstore
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qnx4
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qnx6
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quota quota: Fix quota corruption with generic/232 test 2017-09-27 11:33:47 +02:00
ramfs
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reiserfs
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romfs
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squashfs
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sysfs
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sysv
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tracefs
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ubifs
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udf
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ufs
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xfs xfs: handle racy AIO in xfs_reflink_end_cow 2017-10-03 21:27:55 -07:00
Kconfig
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Kconfig.binfmt
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Makefile
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aio.c
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anon_inodes.c
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attr.c
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bad_inode.c
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binfmt_aout.c
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binfmt_elf.c
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binfmt_elf_fdpic.c
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binfmt_em86.c
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binfmt_flat.c
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binfmt_misc.c exec: binfmt_misc: kill the onstack iname[BINPRM_BUF_SIZE] array 2017-10-03 17:54:25 -07:00
binfmt_script.c exec: load_script: kill the onstack interp[BINPRM_BUF_SIZE] array 2017-10-03 17:54:25 -07:00
block_dev.c
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buffer.c
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char_dev.c
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compat.c
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compat_binfmt_elf.c
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compat_ioctl.c
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coredump.c
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dax.c
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dcache.c
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dcookies.c
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direct-io.c fs: Fix page cache inconsistency when mixing buffered and AIO DIO 2017-09-25 08:56:05 -06:00
drop_caches.c
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eventfd.c
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eventpoll.c
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exec.c exec: load_script: kill the onstack interp[BINPRM_BUF_SIZE] array 2017-10-03 17:54:25 -07:00
fcntl.c fcntl: Don't set si_code to SI_SIGIO when sig == SIGPOLL 2017-09-18 22:51:14 -05:00
fhandle.c
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file.c
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file_table.c
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filesystems.c
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fs-writeback.c
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fs_pin.c
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fs_struct.c
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inode.c
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internal.h
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ioctl.c
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iomap.c Changes since last update: 2017-09-28 13:27:23 -07:00
libfs.c
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locks.c
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mbcache.c
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mount.h
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mpage.c
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namei.c
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namespace.c ovl: fix may_write_real() for overlayfs directories 2017-10-05 15:53:18 +02:00
no-block.c
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nsfs.c
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open.c
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pipe.c
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pnode.c
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pnode.h
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posix_acl.c
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proc_namespace.c
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read_write.c vfs: Return -ENXIO for negative SEEK_HOLE / SEEK_DATA offsets 2017-09-26 13:46:06 -07:00
readdir.c
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select.c
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seq_file.c
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signalfd.c
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splice.c
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stack.c
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stat.c
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statfs.c
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super.c
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sync.c
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timerfd.c
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userfaultfd.c userfaultfd: non-cooperative: fix fork use after free 2017-10-03 17:54:25 -07:00
utimes.c
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xattr.c lsm: fix smack_inode_removexattr and xattr_getsecurity memleak 2017-10-04 18:03:15 +11:00