From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zheyu Ma <zheyuma97@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
isdn@linux-pingi.de, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 07/11] isdn: mISDN: Fix sleeping function called from invalid context
Date: Wed, 20 Oct 2021 20:22:33 -0400 [thread overview]
Message-ID: <20211021002238.1129482-7-sashal@kernel.org> (raw)
In-Reply-To: <20211021002238.1129482-1-sashal@kernel.org>
From: Zheyu Ma <zheyuma97@gmail.com>
[ Upstream commit 6510e80a0b81b5d814e3aea6297ba42f5e76f73c ]
The driver can call card->isac.release() function from an atomic
context.
Fix this by calling this function after releasing the lock.
The following log reveals it:
[ 44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018
[ 44.168941 ] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, name: modprobe
[ 44.169574 ] INFO: lockdep is turned off.
[ 44.169899 ] irq event stamp: 0
[ 44.170160 ] hardirqs last enabled at (0): [<0000000000000000>] 0x0
[ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copy_process+0x132d/0x3e00
[ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copy_process+0x135a/0x3e00
[ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 44.172318 ] Preemption disabled at:
[ 44.172320 ] [<ffffffffa009b0a9>] nj_release+0x69/0x500 [netjet]
[ 44.174441 ] Call Trace:
[ 44.174630 ] dump_stack_lvl+0xa8/0xd1
[ 44.174912 ] dump_stack+0x15/0x17
[ 44.175166 ] ___might_sleep+0x3a2/0x510
[ 44.175459 ] ? nj_release+0x69/0x500 [netjet]
[ 44.175791 ] __might_sleep+0x82/0xe0
[ 44.176063 ] ? start_flush_work+0x20/0x7b0
[ 44.176375 ] start_flush_work+0x33/0x7b0
[ 44.176672 ] ? trace_irq_enable_rcuidle+0x85/0x170
[ 44.177034 ] ? kasan_quarantine_put+0xaa/0x1f0
[ 44.177372 ] ? kasan_quarantine_put+0xaa/0x1f0
[ 44.177711 ] __flush_work+0x11a/0x1a0
[ 44.177991 ] ? flush_work+0x20/0x20
[ 44.178257 ] ? lock_release+0x13c/0x8f0
[ 44.178550 ] ? __kasan_check_write+0x14/0x20
[ 44.178872 ] ? do_raw_spin_lock+0x148/0x360
[ 44.179187 ] ? read_lock_is_recursive+0x20/0x20
[ 44.179530 ] ? __kasan_check_read+0x11/0x20
[ 44.179846 ] ? do_raw_spin_unlock+0x55/0x900
[ 44.180168 ] ? ____kasan_slab_free+0x116/0x140
[ 44.180505 ] ? _raw_spin_unlock_irqrestore+0x41/0x60
[ 44.180878 ] ? skb_queue_purge+0x1a3/0x1c0
[ 44.181189 ] ? kfree+0x13e/0x290
[ 44.181438 ] flush_work+0x17/0x20
[ 44.181695 ] mISDN_freedchannel+0xe8/0x100
[ 44.182006 ] isac_release+0x210/0x260 [mISDNipac]
[ 44.182366 ] nj_release+0xf6/0x500 [netjet]
[ 44.182685 ] nj_remove+0x48/0x70 [netjet]
[ 44.182989 ] pci_device_remove+0xa9/0x250
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/isdn/hardware/mISDN/netjet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/isdn/hardware/mISDN/netjet.c b/drivers/isdn/hardware/mISDN/netjet.c
index 9e6aab04f9d6..8299defff55a 100644
--- a/drivers/isdn/hardware/mISDN/netjet.c
+++ b/drivers/isdn/hardware/mISDN/netjet.c
@@ -949,8 +949,8 @@ nj_release(struct tiger_hw *card)
nj_disable_hwirq(card);
mode_tiger(&card->bc[0], ISDN_P_NONE);
mode_tiger(&card->bc[1], ISDN_P_NONE);
- card->isac.release(&card->isac);
spin_unlock_irqrestore(&card->lock, flags);
+ card->isac.release(&card->isac);
release_region(card->base, card->base_s);
card->base_s = 0;
}
--
2.33.0
next prev parent reply other threads:[~2021-10-21 0:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 0:22 [PATCH AUTOSEL 5.4 01/11] gcc-plugins/structleak: add makefile var for disabling structleak Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 02/11] btrfs: deal with errors when checking if a dir entry exists during log replay Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 03/11] net: stmmac: add support for dwmac 3.40a Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 04/11] ARM: dts: spear3xx: Fix gmac node Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 05/11] nfc: nci: fix the UAF of rf_conn_info object Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 06/11] isdn: cpai: check ctr->cnr to avoid array index out of bound Sasha Levin
2021-10-21 0:22 ` Sasha Levin [this message]
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 08/11] platform/x86: intel_scu_ipc: Update timeout value in comment Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 09/11] ALSA: hda: avoid write to STATESTS if controller is in reset Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 10/11] Input: snvs_pwrkey - add clk handling Sasha Levin
2021-10-21 0:22 ` [PATCH AUTOSEL 5.4 11/11] Input: xpad - add support for another USB ID of Nacon GC-100 Sasha Levin
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