diff options
Diffstat (limited to 'qemu/hw/net/eepro100.c')
| -rw-r--r-- | qemu/hw/net/eepro100.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/qemu/hw/net/eepro100.c b/qemu/hw/net/eepro100.c index 60333b7fc..9b4b9b59d 100644 --- a/qemu/hw/net/eepro100.c +++ b/qemu/hw/net/eepro100.c @@ -40,7 +40,7 @@ * * Wake-on-LAN is not implemented. */ -#include <stddef.h> /* offsetof */ +#include "qemu/osdep.h" #include "hw/hw.h" #include "hw/pci/pci.h" #include "net/net.h" @@ -774,6 +774,11 @@ static void tx_command(EEPRO100State *s) #if 0 uint16_t tx_buffer_el = lduw_le_pci_dma(&s->dev, tbd_address + 6); #endif + if (tx_buffer_size == 0) { + /* Prevent an endless loop. */ + logout("loop in %s:%u\n", __FILE__, __LINE__); + break; + } tbd_address += 8; TRACE(RXTX, logout ("TBD (simplified mode): buffer address 0x%08x, size 0x%04x\n", @@ -855,6 +860,10 @@ static void set_multicast_list(EEPRO100State *s) static void action_command(EEPRO100State *s) { + /* The loop below won't stop if it gets special handcrafted data. + Therefore we limit the number of iterations. */ + unsigned max_loop_count = 16; + for (;;) { bool bit_el; bool bit_s; @@ -870,6 +879,13 @@ static void action_command(EEPRO100State *s) #if 0 bool bit_sf = ((s->tx.command & COMMAND_SF) != 0); #endif + + if (max_loop_count-- == 0) { + /* Prevent an endless loop. */ + logout("loop in %s:%u\n", __FILE__, __LINE__); + break; + } + s->cu_offset = s->tx.link; TRACE(OTHER, logout("val=(cu start), status=0x%04x, command=0x%04x, link=0x%08x\n", |