linux/drivers/tty
Linus Torvalds 3342ff2698 tty: protect tty_write from odd low-level tty disciplines
Al root-caused a new warning from syzbot to the ttyprintk tty driver
returning a write count larger than the data the tty layer actually gave
it.  Which confused the tty write code mightily, and with the new
iov_iter based code, caused a WARNING in iov_iter_revert().

syzbot correctly bisected the source of the new warning to commit
9bb48c82ac ("tty: implement write_iter"), but the oddity goes back
much further, it just didn't get caught by anything before.

Reported-by: syzbot+3d2c27c2b7dc2a94814d@syzkaller.appspotmail.com
Fixes: 9bb48c82ac ("tty: implement write_iter")
Debugged-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-20 21:15:00 -08:00
..
hvc tty: hvc: hvc_opal: Staticify function invoked by reference 2020-11-06 10:54:05 +01:00
ipwireless tty: ipwireless: fix error handling 2020-09-04 18:08:16 +02:00
serdev tty: serdev: core: Provide missing description for 'owner' 2020-11-06 10:49:27 +01:00
serial TTY/Serial fixes for 5.11-rc5 2021-01-24 10:56:45 -08:00
vt tty: Fix whitespace inconsistencies in vt_io_ioctl 2020-12-09 15:35:43 +01:00
amiserial.c Remove every trace of SERIAL_MAGIC 2019-11-13 19:01:14 +08:00
cyclades.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
ehv_bytechan.c tty: evh_bytechan: Fix out of bounds accesses 2020-03-17 23:40:31 +11:00
goldfish.c tty: goldfish: use __raw_writel()/__raw_readl() 2020-10-28 13:44:43 +01:00
isicom.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
Kconfig Revert "init/console: Use ttynull as a fallback when there is no console" 2021-01-08 11:02:18 -08:00
Makefile Revert "init/console: Use ttynull as a fallback when there is no console" 2021-01-08 11:02:18 -08:00
mips_ejtag_fdc.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
moxa.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
moxa.h tty: fix spelling mistake 2020-06-27 16:21:20 +02:00
mxser.c tty: mxser: make mxser_change_speed() return void 2020-05-15 14:47:05 +02:00
mxser.h
n_gsm.c tty: n_gsm: Demote obvious abuse of kernel-doc and supply other missing docss 2020-11-06 10:54:04 +01:00
n_hdlc.c Linux 5.9-rc3 2020-08-31 07:19:25 +02:00
n_null.c
n_r3964.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
n_tracerouter.c
n_tracesink.c
n_tracesink.h tty: n_tracesink: Use the correct style for SPDX License Identifier 2020-03-18 13:01:31 +01:00
n_tty.c Commit 9bb48c82ac ("tty: implement write_iter") converted the tty 2021-01-25 12:08:07 -08:00
nozomi.c tty: nozomi: remove unneeded break 2020-10-28 13:44:43 +01:00
pty.c tty: pty: Provide descriptions for the 'file' parameters 2020-11-06 10:54:04 +01:00
rocket_int.h
rocket.c Merge 5.7-rc3 into tty-next 2020-04-27 09:33:21 +02:00
rocket.h
synclink_gt.c tty: synclink_gt: Demote one kernel-doc header and repair another 2020-11-06 10:54:05 +01:00
sysrq.c tty/sysrq: Extend the sysrq_key_table to cover capital letters 2020-10-02 14:56:06 +02:00
tty_audit.c tty: tty_audit: Demote non-conformant kernel-doc headers 2020-11-06 10:54:04 +01:00
tty_baudrate.c tty: tty_baudrate: Add missing description for 'tty' 2020-11-06 10:49:27 +01:00
tty_buffer.c tty: tty_buffer: Add missing description for 'limit' 2020-11-06 10:49:27 +01:00
tty_io.c tty: protect tty_write from odd low-level tty disciplines 2021-02-20 21:15:00 -08:00
tty_ioctl.c tty: Remove dead termiox code 2020-12-04 16:54:35 +01:00
tty_jobctrl.c Merge 5.10-rc7 into tty-next 2020-12-07 10:19:31 +01:00
tty_ldisc.c tty: tty_ldisc: Fix some kernel-doc related misdemeanours 2020-11-13 15:30:45 +01:00
tty_ldsem.c locking/lockdep: Remove unused @nested argument from lock_release() 2019-10-09 12:46:10 +02:00
tty_mutex.c
tty_port.c tty: tty_port: Demote obvious abuse of kernel-doc formatting 2020-11-06 10:49:27 +01:00
ttynull.c Revert "init/console: Use ttynull as a fallback when there is no console" 2021-01-08 11:02:18 -08:00
vcc.c sparc64: vcc: Fix error return code in vcc_probe() 2020-04-28 14:38:54 +02:00