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| author | Jia He <[email protected]> | 2019-08-09 01:24:56 +0000 |
|---|---|---|
| committer | Petr Mladek <[email protected]> | 2019-08-15 14:40:10 +0000 |
| commit | 36594b317c656bec8f968db93701d2cb9bc9155c (patch) | |
| tree | 4cebb6b88c3d8f37dc076b8bd219ec03f21f974f /lib/test_printf.c | |
| parent | Merge tag 'printk-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/p... (diff) | |
| download | kernel-36594b317c656bec8f968db93701d2cb9bc9155c.tar.gz kernel-36594b317c656bec8f968db93701d2cb9bc9155c.zip | |
vsprintf: Prevent crash when dereferencing invalid pointers for %pD
Commit 3e5903eb9cff ("vsprintf: Prevent crash when dereferencing invalid
pointers") prevents most crash except for %pD.
There is an additional pointer dereferencing before dentry_name.
At least, vma->file can be NULL and be passed to printk %pD in
print_bad_pte, which can cause crash.
This patch fixes it with introducing a new file_dentry_name.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 3e5903eb9cff ("vsprintf: Prevent crash when dereferencing invalid pointers")
To: Geert Uytterhoeven <[email protected]>
To: Thomas Gleixner <[email protected]>
To: Andy Shevchenko <[email protected]>
To: [email protected]
Cc: Kees Cook <[email protected]>
Cc: "Steven Rostedt (VMware)" <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: "Tobin C. Harding" <[email protected]>
Signed-off-by: Jia He <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Sergey Senozhatsky <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>
Diffstat (limited to 'lib/test_printf.c')
0 files changed, 0 insertions, 0 deletions