From: Kalle Valo <kvalo@kernel.org>
To: Ross Lagerwall <ross.lagerwall@citrix.com>,
Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
ath11k@lists.infradead.org, regressions@lists.linux.dev
Subject: [regression v6.5-rc1] PCI: comm "swapper/0" leaking memory
Date: Wed, 30 Aug 2023 12:21:34 +0300 [thread overview]
Message-ID: <878r9sga1t.fsf@kernel.org> (raw)
Hi,
I noticed that starting from v6.5-rc1 my ath11k tests reported several
memory leaks from swapper/0:
unreferenced object 0xffff88810a02b7a8 (size 96):
comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s)
hex dump (first 32 bytes):
80 b8 02 0a 81 88 ff ff b8 72 07 00 00 c9 ff ff .........r......
c8 b7 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 ................
backtrace:
unreferenced object 0xffff88810a02b880 (size 96):
comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s)
hex dump (first 32 bytes):
58 b9 02 0a 81 88 ff ff a8 b7 02 0a 81 88 ff ff X...............
a0 b8 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 ................
backtrace:
unreferenced object 0xffff88810a02b958 (size 96):
comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s)
hex dump (first 32 bytes):
30 ba 02 0a 81 88 ff ff 80 b8 02 0a 81 88 ff ff 0...............
78 b9 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 x...............
backtrace:
unreferenced object 0xffff88810a02ba30 (size 96):
comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s)
hex dump (first 32 bytes):
08 bb 02 0a 81 88 ff ff 58 b9 02 0a 81 88 ff ff ........X.......
50 ba 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 P...............
backtrace:
unreferenced object 0xffff88810a02bb08 (size 96):
comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s)
hex dump (first 32 bytes):
e0 bb 02 0a 81 88 ff ff 30 ba 02 0a 81 88 ff ff ........0.......
28 bb 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 (...............
backtrace:
I can easily reproduce this by doing a simple insmod and rmmod of ath11k
and it's dependencies (mac80211, MHI etc). I can reliability reproduce
the leaks but I only see them once after a boot, I need to reboot the
host to see the leaks again. v6.4 has no leaks.
I did a bisect and found the commit below. I verified reverting the
commit makes the leaks go away.
commit e54223275ba1bc6f704a6bab015fcd2ae4f72572
Author: Ross Lagerwall <ross.lagerwall@citrix.com>
AuthorDate: Thu May 25 16:32:48 2023 +0100
Commit: Bjorn Helgaas <bhelgaas@google.com>
CommitDate: Fri Jun 9 15:06:16 2023 -0500
PCI: Release resource invalidated by coalescing
Kalle
next reply other threads:[~2023-08-30 18:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-30 9:21 Kalle Valo [this message]
2023-08-30 9:55 ` [regression v6.5-rc1] PCI: comm "swapper/0" leaking memory Linux regression tracking (Thorsten Leemhuis)
2023-08-30 11:31 ` Kalle Valo
2023-09-05 16:28 ` Ross Lagerwall
2023-09-06 8:40 ` Kalle Valo
2023-09-06 11:03 ` Ross Lagerwall
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