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| author |   Dan Carpenter <dan.carpenter@linaro.org> | 2023-10-18 17:20:11 +0300 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2023-10-19 15:51:52 -0700 |
| commit | 75a384ceda93df0ec2436f0188e58f166a609c49 (patch) | |
| tree | 5898b6b90f76fcca58af712a03c3fbdc58b5cba1 /drivers/ptp | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net (diff) | |
| download | wireguard-linux-75a384ceda93df0ec2436f0188e58f166a609c49.tar.xz wireguard-linux-75a384ceda93df0ec2436f0188e58f166a609c49.zip | |
ptp: prevent string overflow
The ida_alloc_max() function can return up to INT_MAX so this buffer is
not large enough. Also use snprintf() for extra safety.
Fixes: 403376ddb422 ("ptp: add debugfs interface to see applied channel masks")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/d4b1a995-a0cb-4125-aa1d-5fd5044aba1d@moroto.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/ptp')
| -rw-r--r-- | drivers/ptp/ptp_clock.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index 2e801cd33220..3d1b0a97301c 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -220,7 +220,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, struct ptp_clock *ptp; struct timestamp_event_queue *queue = NULL; int err = 0, index, major = MAJOR(ptp_devt); - char debugfsname[8]; + char debugfsname[16]; size_t size; if (info->n_alarm > PTP_MAX_ALARMS) @@ -343,7 +343,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, } /* Debugfs initialization */ - sprintf(debugfsname, "ptp%d", ptp->index); + snprintf(debugfsname, sizeof(debugfsname), "ptp%d", ptp->index); ptp->debugfs_root = debugfs_create_dir(debugfsname, NULL); return ptp; |