b7ac893652
The kernel may sleep while holding a spinlock. The function call path (from bottom to top) in Linux 4.19 is: net/nfc/nci/uart.c, 349: nci_skb_alloc in nci_uart_default_recv_buf net/nfc/nci/uart.c, 255: (FUNC_PTR)nci_uart_default_recv_buf in nci_uart_tty_receive net/nfc/nci/uart.c, 254: spin_lock in nci_uart_tty_receive nci_skb_alloc(GFP_KERNEL) can sleep at runtime. (FUNC_PTR) means a function pointer is called. To fix this bug, GFP_KERNEL is replaced with GFP_ATOMIC for nci_skb_alloc(). This bug is found by a static analysis tool STCheck written by myself. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| hci | ||
| nci | ||
| Kconfig | ||
| Makefile | ||
| af_nfc.c | ||
| core.c | ||
| digital.h | ||
| digital_core.c | ||
| digital_dep.c | ||
| digital_technology.c | ||
| llcp.h | ||
| llcp_commands.c | ||
| llcp_core.c | ||
| llcp_sock.c | ||
| netlink.c | ||
| nfc.h | ||
| rawsock.c | ||