lkdtm: replace ll_rw_block with submit_bh

Function ll_rw_block was removed in commit 79f597842069 ("fs/buffer:
remove ll_rw_block() helper"). There is no unified function to sumbit
read or write buffer in block layer for now. Consider similar sematics,
we can choose submit_bh() to replace ll_rw_block() as predefined crash
point. In submit_bh(), it also takes read or write flag as the first
argument and invoke submit_bio() to submit I/O request to block layer.

Fixes: 79f597842069 ("fs/buffer: remove ll_rw_block() helper")
Signed-off-by: Yue Zhao <findns94@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230503162944.3969-1-findns94@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/fault-injection/provoke-crashes.rst b/Documentation/fault-injection/provoke-crashes.rst
index 3abe84225613903f373416724b7a0f25e3bcc2f2..1f087e502ca6da92dc30c479057f5a257070e6b5 100644 (file)
--- a/Documentation/fault-injection/provoke-crashes.rst
+++ b/Documentation/fault-injection/provoke-crashes.rst
@@ -29,7 +29,7 @@ recur_count
 cpoint_name
        Where in the kernel to trigger the action. It can be
        one of INT_HARDWARE_ENTRY, INT_HW_IRQ_EN, INT_TASKLET_ENTRY,
-       FS_DEVRW, MEM_SWAPOUT, TIMERADD, SCSI_QUEUE_RQ, or DIRECT.
+       FS_SUBMIT_BH, MEM_SWAPOUT, TIMERADD, SCSI_QUEUE_RQ, or DIRECT.
 
 cpoint_type
        Indicates the action to be taken on hitting the crash point.

diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c
index b4712ff196b4e59bf76347f01213ac43344d98b5..0772e4a4757e9f47a32abb6a76dc613261b2a642 100644 (file)
--- a/drivers/misc/lkdtm/core.c
+++ b/drivers/misc/lkdtm/core.c
@@ -79,7 +79,7 @@ static struct crashpoint crashpoints[] = {
        CRASHPOINT("INT_HARDWARE_ENTRY", "do_IRQ"),
        CRASHPOINT("INT_HW_IRQ_EN",      "handle_irq_event"),
        CRASHPOINT("INT_TASKLET_ENTRY",  "tasklet_action"),
-       CRASHPOINT("FS_DEVRW",           "ll_rw_block"),
+       CRASHPOINT("FS_SUBMIT_BH",               "submit_bh"),
        CRASHPOINT("MEM_SWAPOUT",        "shrink_inactive_list"),
        CRASHPOINT("TIMERADD",           "hrtimer_start"),
        CRASHPOINT("SCSI_QUEUE_RQ",      "scsi_queue_rq"),