diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0110-USB-gadget-fix-illegal-array-access-in-binding-with-.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0110-USB-gadget-fix-illegal-array-access-in-binding-with-.patch | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0110-USB-gadget-fix-illegal-array-access-in-binding-with-.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0110-USB-gadget-fix-illegal-array-access-in-binding-with-.patch deleted file mode 100644 index 542d80e16..000000000 --- a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0110-USB-gadget-fix-illegal-array-access-in-binding-with-.patch +++ /dev/null @@ -1,75 +0,0 @@ -From 15753588bcd4bbffae1cca33c8ced5722477fe1f Mon Sep 17 00:00:00 2001 -From: Kyungtae Kim <kt0755@gmail.com> -Date: Sun, 10 May 2020 05:43:34 +0000 -Subject: [PATCH] USB: gadget: fix illegal array access in binding with UDC - -FuzzUSB (a variant of syzkaller) found an illegal array access -using an incorrect index while binding a gadget with UDC. - -Reference: https://www.spinics.net/lists/linux-usb/msg194331.html - -This bug occurs when a size variable used for a buffer -is misused to access its strcpy-ed buffer. -Given a buffer along with its size variable (taken from user input), -from which, a new buffer is created using kstrdup(). -Due to the original buffer containing 0 value in the middle, -the size of the kstrdup-ed buffer becomes smaller than that of the original. -So accessing the kstrdup-ed buffer with the same size variable -triggers memory access violation. - -The fix makes sure no zero value in the buffer, -by comparing the strlen() of the orignal buffer with the size variable, -so that the access to the kstrdup-ed buffer is safe. - -BUG: KASAN: slab-out-of-bounds in gadget_dev_desc_UDC_store+0x1ba/0x200 -drivers/usb/gadget/configfs.c:266 -Read of size 1 at addr ffff88806a55dd7e by task syz-executor.0/17208 - -CPU: 2 PID: 17208 Comm: syz-executor.0 Not tainted 5.6.8 #1 -Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 -Call Trace: - __dump_stack lib/dump_stack.c:77 [inline] - dump_stack+0xce/0x128 lib/dump_stack.c:118 - print_address_description.constprop.4+0x21/0x3c0 mm/kasan/report.c:374 - __kasan_report+0x131/0x1b0 mm/kasan/report.c:506 - kasan_report+0x12/0x20 mm/kasan/common.c:641 - __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:132 - gadget_dev_desc_UDC_store+0x1ba/0x200 drivers/usb/gadget/configfs.c:266 - flush_write_buffer fs/configfs/file.c:251 [inline] - configfs_write_file+0x2f1/0x4c0 fs/configfs/file.c:283 - __vfs_write+0x85/0x110 fs/read_write.c:494 - vfs_write+0x1cd/0x510 fs/read_write.c:558 - ksys_write+0x18a/0x220 fs/read_write.c:611 - __do_sys_write fs/read_write.c:623 [inline] - __se_sys_write fs/read_write.c:620 [inline] - __x64_sys_write+0x73/0xb0 fs/read_write.c:620 - do_syscall_64+0x9e/0x510 arch/x86/entry/common.c:294 - entry_SYSCALL_64_after_hwframe+0x49/0xbe - -Signed-off-by: Kyungtae Kim <kt0755@gmail.com> -Reported-and-tested-by: Kyungtae Kim <kt0755@gmail.com> -Cc: Felipe Balbi <balbi@kernel.org> -Cc: stable <stable@vger.kernel.org> -Link: https://lore.kernel.org/r/20200510054326.GA19198@pizza01 -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> ---- - drivers/usb/gadget/configfs.c | 3 +++ - 1 file changed, 3 insertions(+) - -diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c -index 32b637e3e1fa..6a9aa4413d64 100644 ---- a/drivers/usb/gadget/configfs.c -+++ b/drivers/usb/gadget/configfs.c -@@ -260,6 +260,9 @@ static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, - char *name; - int ret; - -+ if (strlen(page) < len) -+ return -EOVERFLOW; -+ - name = kstrdup(page, GFP_KERNEL); - if (!name) - return -ENOMEM; --- -2.7.4 - |