diff options
| author | Finn Thain <fthain@telegraphics.com.au> | 2018-01-14 01:37:13 +0300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2018-01-16 18:47:29 +0300 |
| commit | d7811a3678eac540a43d9fd3dda7867280844836 (patch) | |
| tree | 799818f476a0228647bcdfb9dcbc9282970c9cc6 /drivers/nubus | |
| parent | f53bad0881a35c45d89bd8c552dc0498b96403c5 (diff) | |
| download | linux-d7811a3678eac540a43d9fd3dda7867280844836.tar.xz | |
nubus: Validate slot resource IDs
While we are here, include the slot number in the related error messages.
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'drivers/nubus')
| -rw-r--r-- | drivers/nubus/nubus.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/nubus/nubus.c b/drivers/nubus/nubus.c index ef3a115920ca..e7c7e49a074a 100644 --- a/drivers/nubus/nubus.c +++ b/drivers/nubus/nubus.c @@ -616,7 +616,8 @@ static int __init nubus_get_board_resource(struct nubus_board *board, int slot, nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]); if (nbtdata[0] != 1 || nbtdata[1] != 0 || nbtdata[2] != 0 || nbtdata[3] != 0) - pr_err("this sResource is not a board resource!\n"); + pr_err("Slot %X: sResource is not a board resource!\n", + slot); break; } case NUBUS_RESID_NAME: @@ -672,6 +673,7 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes) unsigned long dpat; struct nubus_dir dir; struct nubus_dirent ent; + int prev_resid = -1; /* Move to the start of the format block */ rp = nubus_rom_addr(slot); @@ -711,10 +713,10 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes) /* Directory offset should be small and negative... */ if (!(board->doffset & 0x00FF0000)) - pr_warn("Dodgy doffset!\n"); + pr_warn("Slot %X: Dodgy doffset!\n", slot); dpat = nubus_get_rom(&rp, 4, bytelanes); if (dpat != NUBUS_TEST_PATTERN) - pr_warn("Wrong test pattern %08lx!\n", dpat); + pr_warn("Slot %X: Wrong test pattern %08lx!\n", slot, dpat); /* * I wonder how the CRC is meant to work - @@ -740,12 +742,15 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes) for each of them. */ if (nubus_readdir(&dir, &ent) == -1) { /* We can't have this! */ - pr_err("Board resource not found!\n"); + pr_err("Slot %X: Board resource not found!\n", slot); return NULL; - } else { - nubus_get_board_resource(board, slot, &ent); } + if (ent.type < 1 || ent.type > 127) + pr_warn("Slot %X: Board resource ID is invalid!\n", slot); + + nubus_get_board_resource(board, slot, &ent); + while (nubus_readdir(&dir, &ent) != -1) { struct nubus_dev *dev; struct nubus_dev **devp; @@ -754,6 +759,15 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes) if (dev == NULL) continue; + /* Resources should appear in ascending ID order. This sanity + * check prevents duplicate resource IDs. + */ + if (dev->resid <= prev_resid) { + kfree(dev); + continue; + } + prev_resid = dev->resid; + /* We zeroed this out above */ if (board->first_dev == NULL) board->first_dev = dev; |