Greg Kroah-Hartman wrote on 27/04/2022 15:11:
> I'm announcing the release of the 5.17.5 kernel.
>
> All users of the 5.17 kernel series must upgrade.
>
> The updated 5.17.y git tree can be found at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.17.y
> and can be browsed at the normal kernel.org git web browser:
> 	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary
>
> thanks,
>
> greg k-h
>
<snip>
Hi,

while booting a self compiled kernel 5.17.5, the following warning appeared in
the logs:

Apr 28 15:57:41 xxx kernel: WARNING: CPU: 0 PID: 1 at
drivers/iommu/amd/init.c:851 amd_iommu_enable_interrupts+0x312/0x3f0
Apr 28 15:57:41 xxx kernel: Modules linked in:
Apr 28 15:57:41 xxx kernel: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.5 #1
Apr 28 15:57:41 xxx kernel: Hardware name: Micro-Star International Co., Ltd.
MS-7C94/MAG B550M MORTAR (MS-7C94), BIOS 1.94 09/23/2021
Apr 28 15:57:41 xxx kernel: RIP: 0010:amd_iommu_enable_interrupts+0x312/0x3f0
Apr 28 15:57:41 xxx kernel: Code: ff ff 49 8b 7f 18 89 04 24 e8 2a ff f6 ff 8b
04 24 e9 7b fd ff ff 0f 0b 4d 8b 3f 49 81 ff 90 15 ac b0 0f 85 35 fd ff ff eb 82
<0f> 0b 4d 8b 3f 49 81 ff 90 15 ac b0 0f 85 21 fd ff ff e9 6b ff ff
Apr 28 15:57:41 xxx kernel: RSP: 0018:ffffaf47c005fdd8 EFLAGS: 00010246
Apr 28 15:57:41 xxx kernel: RAX: 0000000f03059ee4 RBX: 0000000000000000 RCX:
0000000000000000
Apr 28 15:57:41 xxx kernel: RDX: 0000000000009da4 RSI: 0000000000009428 RDI:
0000000f03050140
Apr 28 15:57:41 xxx kernel: RBP: 0000000080000000 R08: ffffffffffffffff R09:
0000000000000000
Apr 28 15:57:41 xxx kernel: R10: 00000000000000d1 R11: 0000000000000000 R12:
000ffffffffffff8
Apr 28 15:57:41 xxx kernel: R13: 0800000000000000 R14: 0008000000000000 R15:
ffff8f7380190000
Apr 28 15:57:41 xxx kernel: FS:  0000000000000000(0000)
GS:ffff8f8171c00000(0000) knlGS:0000000000000000
Apr 28 15:57:41 xxx kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 28 15:57:41 xxx kernel: CR2: ffff8f81ae1ff000 CR3: 00000008a740a000 CR4:
0000000000750ef0
Apr 28 15:57:41 xxx kernel: PKRU: 55555554
Apr 28 15:57:41 xxx kernel: Call Trace:
Apr 28 15:57:41 xxx kernel: <TASK>
Apr 28 15:57:41 xxx kernel: iommu_go_to_state+0x10e0/0x138d
Apr 28 15:57:41 xxx kernel: ? e820__memblock_setup+0x78/0x78
Apr 28 15:57:41 xxx kernel: amd_iommu_init+0xa/0x20
Apr 28 15:57:41 xxx kernel: pci_iommu_init+0x11/0x3a
Apr 28 15:57:41 xxx kernel: do_one_initcall+0x47/0x180
Apr 28 15:57:41 xxx kernel: kernel_init_freeable+0x162/0x1a7
Apr 28 15:57:41 xxx kernel: ? rest_init+0xc0/0xc0
Apr 28 15:57:41 xxx kernel: kernel_init+0x11/0x110
Apr 28 15:57:41 xxx kernel: ret_from_fork+0x22/0x30
Apr 28 15:57:41 xxx kernel: </TASK>

Is this serious?
CPU is AMD Ryzen 7 5700G (RENOIR).
The config file is attached.
With kernel 5.17.3 this warning did not appear.

Regards,
Jörg.