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| author | Luciano Coelho <coelho@ti.com> | 2013-01-15 09:43:43 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-01-16 18:09:53 +0100 |
| commit | 4adf07fba3bd64472921a01aae0e116f9f948b77 (patch) | |
| tree | 28b5112f7428b9dec9cc9f9613e6fbdc5f543029 | |
| parent | module, async: async_synchronize_full() on module init iff async is used (diff) | |
| download | linux-4adf07fba3bd64472921a01aae0e116f9f948b77.tar.xz linux-4adf07fba3bd64472921a01aae0e116f9f948b77.zip | |
firmware: make sure the fw file size is not 0
If the requested firmware file size is 0 bytes in the filesytem, we
will try to vmalloc(0), which causes a warning:
vmalloc: allocation failure: 0 bytes
kworker/1:1: page allocation failure: order:0, mode:0xd2
__vmalloc_node_range+0x164/0x208
__vmalloc_node+0x4c/0x58
vmalloc+0x38/0x44
_request_firmware_load+0x220/0x6b0
request_firmware+0x64/0xc8
wl18xx_setup+0xb4/0x570 [wl18xx]
wlcore_nvs_cb+0x64/0x9f8 [wlcore]
request_firmware_work_func+0x94/0x100
process_one_work+0x1d0/0x750
worker_thread+0x184/0x4ac
kthread+0xb4/0xc0
To fix this, check whether the file size is less than or equal to zero
in fw_read_file_contents().
Cc: stable <stable@vger.kernel.org> [3.7]
Signed-off-by: Luciano Coelho <coelho@ti.com>
Acked-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/base/firmware_class.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index d81460309182..b392b353be39 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -305,7 +305,7 @@ static bool fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf char *buf; size = fw_file_size(file); - if (size < 0) + if (size <= 0) return false; buf = vmalloc(size); if (!buf) |