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From: David Howells <dhowells@redhat.com>
To: Shyam Prasad N <nspmangalore@gmail.com>
Cc: dhowells@redhat.com, ronnie sahlberg <ronniesahlberg@gmail.com>,
	Steve French <smfrench@gmail.com>,
	CIFS <linux-cifs@vger.kernel.org>
Subject: Re: null-ptr deref found in netfs code
Date: Sat, 25 Jan 2025 19:13:19 +0000	[thread overview]
Message-ID: <2727967.1737832399@warthog.procyon.org.uk> (raw)
In-Reply-To: <CANT5p=pgD_jM6y1VRUHZRRfSkQWm3juW3oLOVpqFMzW1hMOgOQ@mail.gmail.com>

Shyam Prasad N <nspmangalore@gmail.com> wrote:

> >> netfs: R=00005a08[a] s=2600000-29fffff ctl=200000/400000/400000 sl=5
> But based on the OOPS that I attached in my last email, slot number is
> 5, which explains why folio at that slot is NULL.
> 
> I don't understand the donation logic well enough to understand why
> slot could have overflowed like this. Maybe you can?

Can you get a trace with the following tracepoints turned on:

netfs_read
netfs_rreq
netfs_sreq
netfs_donate

Thanks,
David


  reply	other threads:[~2025-01-25 19:13 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-02  2:16 null-ptr deref found in netfs code Shyam Prasad N
2024-12-02  8:03 ` Shyam Prasad N
2024-12-02 17:10   ` David Howells
2024-12-02 23:11   ` David Howells
2024-12-03  5:33     ` Shyam Prasad N
2024-12-03 11:14     ` David Howells
2024-12-04 16:30       ` Shyam Prasad N
2024-12-04 16:31         ` Shyam Prasad N
2024-12-04 16:52           ` David Howells
2024-12-04 20:46           ` David Howells
2024-12-04 20:50           ` ronnie sahlberg
2024-12-05  4:47             ` Shyam Prasad N
2024-12-05 10:49               ` Shyam Prasad N
2025-01-23 15:47                 ` Shyam Prasad N
2025-01-23 16:31                   ` David Howells
2025-01-23 16:34                   ` David Howells
2025-01-25 17:12                     ` Shyam Prasad N
2025-01-25 19:13                       ` David Howells [this message]
2024-12-03 16:14 ` [PATCH] netfs: Fix non-contiguous donation between completed reads David Howells

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