ptp: Add a upper bound on max_vclocks

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[ Upstream commit e9f35294e1 ]

syzbot reported WARNING in max_vclocks_store.

This occurs when the argument max is too large for kcalloc to handle.

Extend the guard to guard against values that are too large for
kcalloc

Reported-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=94d20db923b9f51be0df
Tested-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com
Fixes: 73f37068d5 ("ptp: support ptp physical/virtual clocks conversion")
Signed-off-by: I Viswanath <viswanathiyyappan@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://patch.msgid.link/20250925155908.5034-1-viswanathiyyappan@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

I Viswanath 2025-09-25 21:29:08 +05:30 • committed by Greg Kroah-Hartman

parent 9d72df7f5e

commit 35ce5f1638

2 changed files with 2 additions and 1 deletions

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1

drivers/ptp/ptp_private.h

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2

drivers/ptp/ptp_sysfs.c

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