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| author | Liu Shixin <liushixin2@huawei.com> | 2022-11-02 10:51:23 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-07 12:07:30 +0100 |
| commit | 0f1a48994b3e516d5c7fd5d12204fdba7a604771 (patch) | |
| tree | 1103f235c12e379d9e17df04db27caa5b4577c2f | |
| parent | c8c1eec578a9ae2dc8f14a1846942a0b7bf29d1d (diff) | |
| download | linux-stable-0f1a48994b3e516d5c7fd5d12204fdba7a604771.tar.gz linux-stable-0f1a48994b3e516d5c7fd5d12204fdba7a604771.tar.bz2 linux-stable-0f1a48994b3e516d5c7fd5d12204fdba7a604771.zip | |
binfmt_misc: fix shift-out-of-bounds in check_special_flags
[ Upstream commit 6a46bf558803dd2b959ca7435a5c143efe837217 ]
UBSAN reported a shift-out-of-bounds warning:
left shift of 1 by 31 places cannot be represented in type 'int'
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106
ubsan_epilogue+0xa/0x44 lib/ubsan.c:151
__ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322
check_special_flags fs/binfmt_misc.c:241 [inline]
create_entry fs/binfmt_misc.c:456 [inline]
bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654
vfs_write+0x11e/0x580 fs/read_write.c:582
ksys_write+0xcf/0x120 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x4194e1
Since the type of Node's flags is unsigned long, we should define these
macros with same type too.
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221102025123.1117184-1-liushixin2@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/binfmt_misc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 2bda9245cabe..558e4007131e 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -42,10 +42,10 @@ static LIST_HEAD(entries); static int enabled = 1; enum {Enabled, Magic}; -#define MISC_FMT_PRESERVE_ARGV0 (1 << 31) -#define MISC_FMT_OPEN_BINARY (1 << 30) -#define MISC_FMT_CREDENTIALS (1 << 29) -#define MISC_FMT_OPEN_FILE (1 << 28) +#define MISC_FMT_PRESERVE_ARGV0 (1UL << 31) +#define MISC_FMT_OPEN_BINARY (1UL << 30) +#define MISC_FMT_CREDENTIALS (1UL << 29) +#define MISC_FMT_OPEN_FILE (1UL << 28) typedef struct { struct list_head list; |