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Pavel Skripkin b1c953dc85 tty: fix memory leak in vc_deallocate 
commit 211b4d42b70f1c1660feaa968dac0efc2a96ac4d upstream.

syzbot reported memory leak in tty/vt.
The problem was in VT_DISALLOCATE ioctl cmd.
After allocating unimap with PIO_UNIMAP it wasn't
freed via VT_DISALLOCATE, but vc_cons[currcons].d was
zeroed.

Reported-by: syzbot+bcc922b19ccc64240b42@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210327214443.21548-1-paskripkin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-11 14:47:39 +02:00
..
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
soc: qcom-geni-se: Cleanup the code to remove proxy votes
2021-04-07 15:00:13 +02:00
vt
tty: fix memory leak in vc_deallocate
2021-05-11 14:47:39 +02:00
amiserial.c
…
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
…
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: check error while registering tty devices
2021-05-11 14:47:21 +02:00
n_hdlc.c
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
2021-03-04 11:37:36 +01:00
n_null.c
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
2021-03-04 11:37:36 +01:00
n_r3964.c
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
2021-03-04 11:37:36 +01:00
n_tracerouter.c
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
2021-03-04 11:37:36 +01:00
n_tracesink.c
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
2021-03-04 11:37:36 +01:00
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
tty: teach the n_tty ICANON case about the new "cookie continuations" too
2021-03-07 12:34:16 +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
…
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: fix up hung_up_tty_read() conversion
2021-03-07 12:34:16 +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
…
tty_mutex.c
…
tty_port.c
…
ttynull.c
…
vcc.c
sparc64: vcc: Fix error return code in vcc_probe()
2020-04-28 14:38:54 +02:00