Linux-stable-mirror August 2024

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504 participants
1314 discussions

Re: Crash on boot with CONFIG_JUMP_LABEL in 6.10

by Sam James

Peter Zijlstra <peterz(a)infradead.org> writes: > On Tue, Jul 30, 2024 at 08:36:13PM -0400, matoro wrote: >> On 2024-07-30 09:50, John David Anglin wrote: >> > On 2024-07-30 9:41 a.m., John David Anglin wrote: >> > > On 2024-07-29 7:11 p.m., matoro wrote: >> > > > Hi all, just bumped to the newest mainline starting with 6.10.2 >> > > > and immediately ran into a crash on boot. Fully reproducible, >> > > > reverting back to last known good (6.9.8) resolves the issue. >> > > > Any clue what's going on here? >> > > > I can provide full boot logs, start bisecting, etc if needed... >> > > 6.10.2 built and booted okay on my c8000 with the attached config. >> > > You could start >> > > with it and incrementally add features to try to identify the one >> > > that causes boot failure. >> > Oh, I have an experimental clocksource patch installed. You will need >> > to regenerate config >> > with "make oldconfig" to use the current timer code. Probably, this >> > would happen automatically. >> > > >> > > Your config would be needed to duplicate. Full boot log would also help. >> > >> > Dave >> >> Hi Dave, bisecting quickly revealed the cause here. > > https://lkml.kernel.org/r/20240731105557.GY33588@noisy.programming.kicks-as… Greg, I see tglx's jump_label fix is queued for 6.10.3 but this one isn't as it came too late. Is there any chance of chucking it in? It's pretty nasty. thanks, sam

3 months, 1 week

[PATCH net v1] net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex

by Herve Codina

The carrier_lock spinlock protects the carrier detection. While it is hold, framer_get_status() is called witch in turn takes a mutex. This is not correct and can lead to a deadlock. A run with PROVE_LOCKING enabled detected the issue: [ BUG: Invalid wait context ] ... c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78 other info that might help us debug this: context-{4:4} 2 locks held by ifconfig/146: #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664 #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98 Avoid the spinlock usage and convert carrier_lock to a mutex. Fixes: 54762918ca85 ("net: wan: fsl_qmc_hdlc: Add framer support") Cc: stable(a)vger.kernel.org Signed-off-by: Herve Codina <herve.codina(a)bootlin.com> --- drivers/net/wan/fsl_qmc_hdlc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/wan/fsl_qmc_hdlc.c b/drivers/net/wan/fsl_qmc_hdlc.c index c5e7ca793c43..64b4bfa6fea7 100644 --- a/drivers/net/wan/fsl_qmc_hdlc.c +++ b/drivers/net/wan/fsl_qmc_hdlc.c @@ -18,6 +18,7 @@ #include <linux/hdlc.h> #include <linux/mod_devicetable.h> #include <linux/module.h> +#include <linux/mutex.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> @@ -37,7 +38,7 @@ struct qmc_hdlc { struct qmc_chan *qmc_chan; struct net_device *netdev; struct framer *framer; - spinlock_t carrier_lock; /* Protect carrier detection */ + struct mutex carrier_lock; /* Protect carrier detection */ struct notifier_block nb; bool is_crc32; spinlock_t tx_lock; /* Protect tx descriptors */ @@ -60,7 +61,7 @@ static int qmc_hdlc_framer_set_carrier(struct qmc_hdlc *qmc_hdlc) if (!qmc_hdlc->framer) return 0; - guard(spinlock_irqsave)(&qmc_hdlc->carrier_lock); + guard(mutex)(&qmc_hdlc->carrier_lock); ret = framer_get_status(qmc_hdlc->framer, &framer_status); if (ret) { @@ -706,7 +707,7 @@ static int qmc_hdlc_probe(struct platform_device *pdev) qmc_hdlc->dev = dev; spin_lock_init(&qmc_hdlc->tx_lock); - spin_lock_init(&qmc_hdlc->carrier_lock); + mutex_init(&qmc_hdlc->carrier_lock); qmc_hdlc->qmc_chan = devm_qmc_chan_get_bychild(dev, dev->of_node); if (IS_ERR(qmc_hdlc->qmc_chan)) -- 2.45.0

3 months, 1 week

[PATCH AUTOSEL 5.4 01/22] drm/amdgpu: fix overflowed array index read warning

by Sasha Levin

From: Tim Huang <Tim.Huang(a)amd.com> [ Upstream commit ebbc2ada5c636a6a63d8316a3408753768f5aa9f ] Clear overflowed array index read warning by cast operation. Signed-off-by: Tim Huang <Tim.Huang(a)amd.com> Reviewed-by: Alex Deucher <alexander.deucher(a)amd.com> Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index e5c83e164d82a..8fafda87d4ce8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -437,8 +437,9 @@ static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { struct amdgpu_ring *ring = file_inode(f)->i_private; - int r, i; uint32_t value, result, early[3]; + loff_t i; + int r; if (*pos & 3 || size & 3) return -EINVAL; -- 2.43.0

3 months, 1 week

[PATCH AUTOSEL 6.6 01/83] drm/amd/display: Assign linear_pitch_alignment even for VM

by Sasha Levin

From: Alvin Lee <alvin.lee2(a)amd.com> [ Upstream commit 984debc133efa05e62f5aa1a7a1dd8ca0ef041f4 ] [Description] Assign linear_pitch_alignment so we don't cause a divide by 0 error in VM environments Reviewed-by: Sohaib Nadeem <sohaib.nadeem(a)amd.com> Acked-by: Wayne Lin <wayne.lin(a)amd.com> Signed-off-by: Alvin Lee <alvin.lee2(a)amd.com> Tested-by: Daniel Wheeler <daniel.wheeler(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/display/dc/core/dc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 72db370e2f21f..50e643bfdfbad 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1298,6 +1298,7 @@ struct dc *dc_create(const struct dc_init_data *init_params) return NULL; if (init_params->dce_environment == DCE_ENV_VIRTUAL_HW) { + dc->caps.linear_pitch_alignment = 64; if (!dc_construct_ctx(dc, init_params)) goto destruct_dc; } else { -- 2.43.0

3 months, 1 week

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Linux-stable-mirror August 2024