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DLPX-86675 Disk quota exceeded when unpacking an upgrade image#27

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Jun 27, 2023
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DLPX-86675 Disk quota exceeded when unpacking an upgrade image#27
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@prakashsurya prakashsurya force-pushed the dlpx/pr/prakashsurya/5307fbf9-2340-4832-aaea-b64800076422 branch from 0572f20 to 0c6798a Compare June 26, 2023 16:03
@prakashsurya prakashsurya marked this pull request as ready for review June 26, 2023 16:13
@prakashsurya prakashsurya force-pushed the dlpx/pr/prakashsurya/5307fbf9-2340-4832-aaea-b64800076422 branch from c95794c to dc2f7e3 Compare June 27, 2023 17:11
@prakashsurya prakashsurya enabled auto-merge (squash) June 27, 2023 17:12
@prakashsurya prakashsurya merged commit 535e755 into develop Jun 27, 2023
@prakashsurya prakashsurya deleted the dlpx/pr/prakashsurya/5307fbf9-2340-4832-aaea-b64800076422 branch June 27, 2023 17:37
grwilson pushed a commit to grwilson/linux-kernel-generic that referenced this pull request Sep 7, 2023
delphix-devops-bot pushed a commit that referenced this pull request Jul 20, 2024
BugLink: https://bugs.launchpad.net/bugs/2067959

commit fff1386 upstream.

Running a lot of VK CTS in parallel against nouveau, once every
few hours you might see something like this crash.

BUG: kernel NULL pointer dereference, address: 0000000000000008
PGD 8000000114e6e067 P4D 8000000114e6e067 PUD 109046067 PMD 0
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 7 PID: 53891 Comm: deqp-vk Not tainted 6.8.0-rc6+ #27
Hardware name: Gigabyte Technology Co., Ltd. Z390 I AORUS PRO WIFI/Z390 I AORUS PRO WIFI-CF, BIOS F8 11/05/2021
RIP: 0010:gp100_vmm_pgt_mem+0xe3/0x180 [nouveau]
Code: c7 48 01 c8 49 89 45 58 85 d2 0f 84 95 00 00 00 41 0f b7 46 12 49 8b 7e 08 89 da 42 8d 2c f8 48 8b 47 08 41 83 c7 01 48 89 ee <48> 8b 40 08 ff d0 0f 1f 00 49 8b 7e 08 48 89 d9 48 8d 75 04 48 c1
RSP: 0000:ffffac20c5857838 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00000000004d8001 RCX: 0000000000000001
RDX: 00000000004d8001 RSI: 00000000000006d8 RDI: ffffa07afe332180
RBP: 00000000000006d8 R08: ffffac20c5857ad0 R09: 0000000000ffff10
R10: 0000000000000001 R11: ffffa07af27e2de0 R12: 000000000000001c
R13: ffffac20c5857ad0 R14: ffffa07a96fe9040 R15: 000000000000001c
FS:  00007fe395eed7c0(0000) GS:ffffa07e2c980000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000011febe001 CR4: 00000000003706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:

...

 ? gp100_vmm_pgt_mem+0xe3/0x180 [nouveau]
 ? gp100_vmm_pgt_mem+0x37/0x180 [nouveau]
 nvkm_vmm_iter+0x351/0xa20 [nouveau]
 ? __pfx_nvkm_vmm_ref_ptes+0x10/0x10 [nouveau]
 ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau]
 ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau]
 ? __lock_acquire+0x3ed/0x2170
 ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau]
 nvkm_vmm_ptes_get_map+0xc2/0x100 [nouveau]
 ? __pfx_nvkm_vmm_ref_ptes+0x10/0x10 [nouveau]
 ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau]
 nvkm_vmm_map_locked+0x224/0x3a0 [nouveau]

Adding any sort of useful debug usually makes it go away, so I hand
wrote the function in a line, and debugged the asm.

Every so often pt->memory->ptrs is NULL. This ptrs ptr is set in
the nv50_instobj_acquire called from nvkm_kmap.

If Thread A and Thread B both get to nv50_instobj_acquire around
the same time, and Thread A hits the refcount_set line, and in
lockstep thread B succeeds at refcount_inc_not_zero, there is a
chance the ptrs value won't have been stored since refcount_set
is unordered. Force a memory barrier here, I picked smp_mb, since
we want it on all CPUs and it's write followed by a read.

v2: use paired smp_rmb/smp_wmb.

Cc: <stable@vger.kernel.org>
Fixes: be55287 ("drm/nouveau/imem/nv50: embed nvkm_instobj directly into nv04_instobj")
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240411011510.2546857-1-airlied@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
delphix-devops-bot pushed a commit that referenced this pull request Sep 14, 2024
BugLink: https://bugs.launchpad.net/bugs/2072617

[ Upstream commit 8987515 ]

When request_irq() fails, error path calls vp_del_vqs(). There, as vq is
present in the list, free_irq() is called for the same vector. That
causes following splat:

[    0.414355] Trying to free already-free IRQ 27
[    0.414403] WARNING: CPU: 1 PID: 1 at kernel/irq/manage.c:1899 free_irq+0x1a1/0x2d0
[    0.414510] Modules linked in:
[    0.414540] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4+ #27
[    0.414540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014
[    0.414540] RIP: 0010:free_irq+0x1a1/0x2d0
[    0.414540] Code: 1e 00 48 83 c4 08 48 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 8b 74 24 04 48 c7 c7 98 80 6c b1 e8 00 c9 f7 ff 90 <0f> 0b 90 90 48 89 ee 4c 89 ef e8 e0 20 b8 00 49 8b 47 40 48 8b 40
[    0.414540] RSP: 0000:ffffb71480013ae0 EFLAGS: 00010086
[    0.414540] RAX: 0000000000000000 RBX: ffffa099c2722000 RCX: 0000000000000000
[    0.414540] RDX: 0000000000000000 RSI: ffffb71480013998 RDI: 0000000000000001
[    0.414540] RBP: 0000000000000246 R08: 00000000ffffdfff R09: 0000000000000001
[    0.414540] R10: 00000000ffffdfff R11: ffffffffb18729c0 R12: ffffa099c1c91760
[    0.414540] R13: ffffa099c1c916a4 R14: ffffa099c1d2f200 R15: ffffa099c1c91600
[    0.414540] FS:  0000000000000000(0000) GS:ffffa099fec40000(0000) knlGS:0000000000000000
[    0.414540] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.414540] CR2: 0000000000000000 CR3: 0000000008e3e001 CR4: 0000000000370ef0
[    0.414540] Call Trace:
[    0.414540]  <TASK>
[    0.414540]  ? __warn+0x80/0x120
[    0.414540]  ? free_irq+0x1a1/0x2d0
[    0.414540]  ? report_bug+0x164/0x190
[    0.414540]  ? handle_bug+0x3b/0x70
[    0.414540]  ? exc_invalid_op+0x17/0x70
[    0.414540]  ? asm_exc_invalid_op+0x1a/0x20
[    0.414540]  ? free_irq+0x1a1/0x2d0
[    0.414540]  vp_del_vqs+0xc1/0x220
[    0.414540]  vp_find_vqs_msix+0x305/0x470
[    0.414540]  vp_find_vqs+0x3e/0x1a0
[    0.414540]  vp_modern_find_vqs+0x1b/0x70
[    0.414540]  init_vqs+0x387/0x600
[    0.414540]  virtnet_probe+0x50a/0xc80
[    0.414540]  virtio_dev_probe+0x1e0/0x2b0
[    0.414540]  really_probe+0xc0/0x2c0
[    0.414540]  ? __pfx___driver_attach+0x10/0x10
[    0.414540]  __driver_probe_device+0x73/0x120
[    0.414540]  driver_probe_device+0x1f/0xe0
[    0.414540]  __driver_attach+0x88/0x180
[    0.414540]  bus_for_each_dev+0x85/0xd0
[    0.414540]  bus_add_driver+0xec/0x1f0
[    0.414540]  driver_register+0x59/0x100
[    0.414540]  ? __pfx_virtio_net_driver_init+0x10/0x10
[    0.414540]  virtio_net_driver_init+0x90/0xb0
[    0.414540]  do_one_initcall+0x58/0x230
[    0.414540]  kernel_init_freeable+0x1a3/0x2d0
[    0.414540]  ? __pfx_kernel_init+0x10/0x10
[    0.414540]  kernel_init+0x1a/0x1c0
[    0.414540]  ret_from_fork+0x31/0x50
[    0.414540]  ? __pfx_kernel_init+0x10/0x10
[    0.414540]  ret_from_fork_asm+0x1a/0x30
[    0.414540]  </TASK>

Fix this by calling deleting the current vq when request_irq() fails.

Fixes: 0b0f9dc ("Revert "virtio_pci: use shared interrupts for virtqueues"")
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240426150845.3999481-1-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
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