On Mon, 31 Jul 2023 10:40:31 +0200, Oleksandr Natalenko wrote:
> qedf driver, debugfs part of it specifically, touches __user pointers
> directly for printing out info to userspace via sprintf(), which may
> cause crash like this:
>
> BUG: unable to handle kernel paging request at 00007ffd1d6b43a0
> IP: [<ffffffffaa7a882a>] string.isra.7+0x6a/0xf0
> Oops: 0003 [#1] SMP
> Call Trace:
> [<ffffffffaa7a9f31>] vsnprintf+0x201/0x6a0
> [<ffffffffaa7aa556>] sprintf+0x56/0x80
> [<ffffffffc04227ed>] qedf_dbg_stop_io_on_error_cmd_read+0x6d/0x90 [qedf]
> [<ffffffffaa65bb2f>] vfs_read+0x9f/0x170
> [<ffffffffaa65cb82>] SyS_pread64+0x92/0xc0
>
> [...]
Applied to 6.6/scsi-queue, thanks!
[1/3] scsi: qedf: do not touch __user pointer in qedf_dbg_stop_io_on_error_cmd_read() directly
https://git.kernel.org/mkp/scsi/c/7d3d20dee4f6
[2/3] scsi: qedf: do not touch __user pointer in qedf_dbg_debug_cmd_read() directly
https://git.kernel.org/mkp/scsi/c/31b5991a9a91
[3/3] scsi: qedf: do not touch __user pointer in qedf_dbg_fp_int_cmd_read() directly
https://git.kernel.org/mkp/scsi/c/25dbc20deab5
--
Martin K. Petersen Oracle Linux Engineering
