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linux/drivers/tty
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Linus Torvalds ffec7ee218 tty: protect tty_write from odd low-level tty disciplines 
commit 3342ff2698e9720f4040cc458a2744b2b32f5c3a upstream.

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
9bb48c82aced ("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: 9bb48c82aced ("tty: implement write_iter")
Debugged-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-23 15:53:24 +01:00
..
hvc
tty: hvc: fix link error with CONFIG_SERIAL_CORE_CONSOLE=n
2020-09-27 14:17:43 +02:00
ipwireless
tty: ipwireless: fix error handling
2020-09-04 18:08:16 +02:00
serdev
serdev: Fix detection of UART devices on Apple machines.
2020-03-06 14:10:44 +01:00
serial
serial: mvebu-uart: fix tx lost characters at power off
2021-01-27 11:55:16 +01:00
vt
TTY/Serial fixes for 5.10-rc3
2020-11-08 11:28:08 -08:00
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
…
isicom.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
Kconfig
treewide: replace '---help---' in Kconfig files with 'help'
2020-06-14 01:57:21 +09:00
Makefile
…
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
Linux 5.9-rc3
2020-08-31 07:19:25 +02:00
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 9bb48c82aced ("tty: implement write_iter") converted the tty layer to use write_iter. Fix the redirected_tty_write declaration also in n_tty and change the comparisons to use write_iter instead of write. also in n_tty and change the comparisons to use write_iter instead of write.
2021-01-27 11:55:30 +01:00
nozomi.c
tty: nozomi: Use scnprintf() for avoiding potential buffer overflow
2020-03-18 12:59:29 +01:00
pty.c
pty: do tty_flip_buffer_push without port->lock in pty_write
2020-09-04 18:10:30 +02:00
rocket_int.h
…
rocket.c
Merge 5.7-rc3 into tty-next
2020-04-27 09:33:21 +02:00
rocket.h
tty: rocket: Remove RCPK_GET_STRUCT ioctl
2019-04-25 11:58:56 +02:00
synclink_gt.c
tty: synclink_gt: switch from 'pci_' to 'dma_' API
2020-09-04 18:07:22 +02:00
synclink.c
tty: synclink, fix kernel-doc
2020-08-18 13:51:18 +02:00
synclinkmp.c
tty: synclink, fix kernel-doc
2020-08-18 13:51:18 +02:00
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_baudrate.c
tty: fix kernel-doc
2020-08-18 13:51:18 +02:00
tty_buffer.c
tty: fix kernel-doc
2020-08-18 13:51:18 +02:00
tty_io.c
tty: protect tty_write from odd low-level tty disciplines
2021-02-23 15:53:24 +01:00
tty_ioctl.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
tty_jobctrl.c
tty: Fix ->session locking
2020-12-04 17:39:58 +01:00
tty_ldisc.c
tty: fix kernel-doc
2020-08-18 13:51:18 +02:00
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
serdev: ttyport: restore client ops on deregistration
2020-02-10 12:26:44 -08:00
ttynull.c
…
vcc.c
sparc64: vcc: Fix error return code in vcc_probe()
2020-04-28 14:38:54 +02:00