linux-kernel - Re: 6.18/regression/bisected – BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321 after 6d31602a9f57

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Message-ID: <CABXGCsO2Yx1FvyryYU_R=kvS292eCDaLr9j0LHKPtNDkkz28PQ@mail.gmail.com>
Date: Tue, 7 Oct 2025 22:33:36 +0500
From: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
To: "Pillai, Aurabindo" <aurabindo.pillai@....com>, nicholas.kazlauskas@....com, 
	"Wu, Ray" <ray.wu@....com>, "Wheeler, Daniel" <daniel.wheeler@....com>, roman.li@....com, 
	"Chung, ChiaHsuan (Tom)" <chiahsuan.chung@....com>, "Deucher, Alexander" <alexander.deucher@....com>
Cc: amd-gfx list <amd-gfx@...ts.freedesktop.org>, 
	Linux List Kernel Mailing <linux-kernel@...r.kernel.org>, 
	Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: 6.18/regression/bisected – BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321 after 6d31602a9f57

On Mon, Oct 6, 2025 at 12:11 AM Mikhail Gavrilov
<mikhail.v.gavrilov@...il.com> wrote:
>
> Unfortunately, I couldn’t fully recheck the kernel without this commit
> because reverting it leads to a merge conflict:
> $ git revert -n 6d31602a9f57a7bb3c6c8dbde1d00af67e250a3f
> Auto-merging drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> CONFLICT (content): Merge conflict in
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> error: could not revert 6d31602a9f57... drm/amd/display: more liberal
> vmin/vmax update for freesync

Quick update: I was able to revert 6d31602a9f57 after reverting
9d6939179491 on top of c746c3b51698.

$ git revert -n 9d6939179491 6d31602a9f57
Auto-merging drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
Auto-merging drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

With both reverts applied, the IRQ-context “sleeping function”
flooding stops on my system. So the regression seems tied to that pair
(at least on my setup).

However, I now see a different WARN I hadn’t noticed before:

[   21.001620] [drm] Initialized amdgpu 3.64.0 for 0000:03:00.0 on minor 1
[   21.005679] ------------[ cut here ]------------
[   21.005682] WARNING: CPU: 23 PID: 910 at
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c:138
amdgpu_vm_set_pasid+0x1bc/0x2b0 [amdgpu]
[   21.006017] Modules linked in: amdgpu(+) amdxcp i2c_algo_bit
drm_ttm_helper ttm drm_exec drm_panel_backlight_quirks gpu_sched
drm_suballoc_helper drm_buddy drm_display_helper polyval_clmulni
ghash_clmulni_intel r8169 nvme_tcp cec nvme nvme_fabrics video realtek
sp5100_tco wmi nvme_core nvme_keyring nvme_auth hkdf sunrpc be2iscsi
bnx2i cnic uio cxgb4i cxgb4 tls cxgb3i cxgb3 mdio libcxgbi libcxgb
qla4xxx iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi
scsi_transport_iscsi ntsync i2c_dev fuse nfnetlink
[   21.006069] CPU: 23 UID: 0 PID: 910 Comm: (udev-worker) Tainted: G
           L      6.17.0-c746c3b51698-rev-9d6939179491-6d31602a9f57+
#59 PREEMPT(lazy)
[   21.006073] Tainted: [L]=SOFTLOCKUP
[   21.006074] Hardware name: ASRock B650I Lightning WiFi/B650I
Lightning WiFi, BIOS 3.30 06/16/2025
[   21.006076] RIP: 0010:amdgpu_vm_set_pasid+0x1bc/0x2b0 [amdgpu]
[   21.006320] Code: c1 e9 03 80 3c 11 00 0f 85 f8 00 00 00 48 8b b8
80 01 00 00 be ff ff ff ff 48 83 c7 70 e8 ac b3 06 e7 85 c0 0f 85 9b
fe ff ff <0f> 0b e9 94 fe ff ff 49 8d bf f0 fd 00 00 4c 89 44 24 08 89
34 24
[   21.006322] RSP: 0018:ffffc900062bf338 EFLAGS: 00010246
[   21.006326] RAX: 0000000000000000 RBX: ffff8881e87dc000 RCX: 0000000000000000
[   21.006327] RDX: 0000000000000000 RSI: ffffffffa9790513 RDI: ffffffffa8cba320
[   21.006329] RBP: 0000000000008000 R08: 0000000000000001 R09: ffffed103d0fa009
[   21.006330] R10: 0000000000000017 R11: 0000000000000000 R12: ffff8881e87dc000
[   21.006332] R13: ffff888124fa4000 R14: ffff88827cc80018 R15: ffff88827cc80000
[   21.006333] FS:  00007f0e74dd7040(0000) GS:ffff8890282e0000(0000)
knlGS:0000000000000000
[   21.006337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.006339] CR2: 0000560ee54ae9d0 CR3: 00000001f2871000 CR4: 0000000000f50ef0
[   21.006340] PKRU: 55555554
[   21.006341] Call Trace:
[   21.006342]  <TASK>
[   21.006345]  amdgpu_driver_open_kms+0x2c8/0x6b0 [amdgpu]
[   21.006591]  drm_file_alloc+0x5d4/0xb10
[   21.006597]  drm_client_init+0x1ae/0x4d0
[   21.006601]  ? drm_dev_register.cold+0x187/0x21c
[   21.006604]  ? drm_dev_register+0x1fe/0x770
[   21.006608]  amdgpu_amdkfd_drm_client_create+0x8f/0xe0 [amdgpu]
[   21.006897]  amdgpu_pci_probe+0x503/0xd70 [amdgpu]
[   21.007137]  ? __raw_spin_unlock_irqrestore+0x5d/0x80
[   21.007140]  ? __raw_spin_unlock_irqrestore+0x46/0x80
[   21.007143]  ? __pfx_amdgpu_pci_probe+0x10/0x10 [amdgpu]
[   21.007377]  local_pci_probe+0xd6/0x190
[   21.007382]  pci_call_probe+0x176/0x520
[   21.007384]  ? __lock_release.isra.0+0x1cb/0x340
[   21.007387]  ? __pfx_pci_call_probe+0x10/0x10
[   21.007389]  ? __pfx___driver_attach+0x10/0x10
[   21.007395]  ? pci_match_device+0x386/0x790
[   21.007397]  ? kernfs_put+0x20/0x40
[   21.007402]  ? __pfx___driver_attach+0x10/0x10
[   21.007404]  pci_device_probe+0x179/0x2c0
[   21.007407]  really_probe+0x1de/0x890
[   21.007411]  ? __pfx___driver_attach+0x10/0x10
[   21.007413]  __driver_probe_device+0x18c/0x390
[   21.007416]  ? __pfx___driver_attach+0x10/0x10
[   21.007418]  driver_probe_device+0x4a/0x120
[   21.007421]  __driver_attach+0x1a0/0x530
[   21.007424]  ? __pfx___driver_attach+0x10/0x10
[   21.007426]  bus_for_each_dev+0x108/0x190
[   21.007430]  ? __pfx_bus_for_each_dev+0x10/0x10
[   21.007434]  ? __pfx_amdgpu_init+0x10/0x10 [amdgpu]
[   21.007673]  ? __pfx_amdgpu_init+0x10/0x10 [amdgpu]
[   21.007916]  bus_add_driver+0x2eb/0x540
[   21.007920]  ? __pfx_amdgpu_init+0x10/0x10 [amdgpu]
[   21.008155]  driver_register+0x1a3/0x3a0
[   21.008160]  do_one_initcall+0xd2/0x450
[   21.008165]  ? __pfx_do_one_initcall+0x10/0x10
[   21.008169]  ? kasan_unpoison+0x10/0x70
[   21.008173]  ? kasan_unpoison+0x44/0x70
[   21.008177]  do_init_module+0x2cc/0x8f0
[   21.008183]  ? __pfx_do_init_module+0x10/0x10
[   21.008185]  ? rcu_read_lock_any_held.part.0+0x4a/0x80
[   21.008188]  ? touch_atime+0x24a/0x490
[   21.008194]  init_module_from_file+0xe1/0x160
[   21.008196]  ? __pfx_init_module_from_file+0x10/0x10
[   21.008204]  ? local_clock+0x15/0x30
[   21.008207]  ? __lock_release.isra.0+0x1cb/0x340
[   21.008211]  ? do_raw_spin_unlock+0x59/0x230
[   21.008215]  idempotent_init_module+0x21e/0x750
[   21.008217]  ? __pfx_cred_has_capability.isra.0+0x10/0x10
[   21.008221]  ? __pfx_idempotent_init_module+0x10/0x10
[   21.008229]  ? security_capable+0x87/0x150
[   21.008233]  __x64_sys_finit_module+0xcd/0x150
[   21.008237]  do_syscall_64+0x98/0x350
[   21.008244]  ? __x64_sys_pread64+0x191/0x250
[   21.008248]  ? __pfx___x64_sys_pread64+0x10/0x10
[   21.008252]  ? rcu_is_watching+0x15/0xe0
[   21.008255]  ? lockdep_hardirqs_on+0x8c/0x130
[   21.008257]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   21.008259]  ? do_syscall_64+0x13b/0x350
[   21.008261]  ? __pfx_do_sys_openat2+0x10/0x10
[   21.008267]  ? __pfx___seccomp_filter+0x10/0x10
[   21.008272]  ? __x64_sys_openat+0x10e/0x210
[   21.008276]  ? __x64_sys_pread64+0x191/0x250
[   21.008278]  ? __pfx___x64_sys_openat+0x10/0x10
[   21.008282]  ? rcu_is_watching+0x15/0xe0
[   21.008285]  ? lockdep_hardirqs_on+0x8c/0x130
[   21.008287]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   21.008288]  ? do_syscall_64+0x13b/0x350
[   21.008290]  ? rcu_is_watching+0x15/0xe0
[   21.008294]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   21.008296] RIP: 0033:0x7f0e7574220d
[   21.008303] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e
fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24
08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 6b 0f 00 f7 d8 64 89
01 48
[   21.008305] RSP: 002b:00007ffc190432d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[   21.008307] RAX: ffffffffffffffda RBX: 0000564eea438730 RCX: 00007f0e7574220d
[   21.008308] RDX: 0000000000000000 RSI: 0000564eea43a070 RDI: 00000000000000b5
[   21.008309] RBP: 00007ffc19043370 R08: 0000000000000000 R09: 0000564eea439cd0
[   21.008310] R10: 0000000000000000 R11: 0000000000000246 R12: 0000564eea43a070
[   21.008311] R13: 0000564eea4331b0 R14: 0000000000020000 R15: 0000000000000000
[   21.008317]  </TASK>
[   21.008321] irq event stamp: 1120885

This PASID-related WARN could be unrelated to the vmin/vmax path; if
you’d like, I can bisect it separately.
Either way, I’m happy to test any proposed fix (e.g., deferring
vmin/vmax updates from IRQ to a workqueue, or restoring the older
condition so the update doesn’t run in IRQ).

I’ve attached below the full kernel log after the revert.

-- 
Best Regards,
Mike Gavrilov.

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