Comment # 43 on bug 1199355 from Stefan Seyfried

5.19-rc1 crashes differently:

[14956.861060] loop: module loaded
[14956.873083] loop0: detected capacity change from 0 to 37748736
[14956.934270] EXT4-fs (loop0): mounted filesystem without journal. Quota mode:
none.
[14971.342291] EXT4-fs (loop0): unmounting filesystem.
[17413.978424] Unable to handle kernel paging request at virtual address
fffe75b44f2d4a00
[17413.978465] Mem abort info:
[17413.978470]   ESR = 0x0000000096000004
[17413.978476]   EC = 0x25: DABT (current EL), IL = 32 bits
[17413.978482]   SET = 0, FnV = 0
[17413.978486]   EA = 0, S1PTW = 0
[17413.978490]   FSC = 0x04: level 0 translation fault
[17413.978495] Data abort info:
[17413.978499]   ISV = 0, ISS = 0x00000004
[17413.978503]   CM = 0, WnR = 0
[17413.978508] [fffe75b44f2d4a00] address between user and kernel address
ranges
[17413.978516] Internal error: Oops: 96000004 [#1] SMP
[17413.978525] Modules linked in: loop tun af_packet iscsi_ibft
iscsi_boot_sysfs nls_iso8859_1 xfs nls_cp437 libcrc32c vfat fat btsdio
cpufreq_dt hci_uart btqca btrtl btbcm btintel brcmfmac brcmutil bluetooth
broadcom cfg80211 bcm_phy_lib ecdh_generic rfkill raspberrypi_cpufreq
iproc_rng200 bcm2711_thermal genet mdio_bcm_unimac simpledrm leds_gpio
efi_pstore uio_pdrv_genirq drm_shmem_helper nvmem_rmem uio drm_kms_helper
syscopyarea sysfillrect sysimgblt fb_sys_fops drm fuse ip_tables x_tables ext4
mbcache jbd2 hid_generic usbhid uas usb_storage xhci_pci xhci_pci_renesas
xhci_hcd usbcore usb_common crct10dif_ce clk_raspberrypi gpio_raspberrypi_exp
bcm2835_dma virt_dma raspberrypi_hwmon bcm2835_wdt sdhci_iproc sdhci_pltfm
gpio_regulator sdhci mmc_core pcie_brcmstb phy_generic fixed sg efivarfs
[17413.978689] CPU: 0 PID: 13 Comm: ksoftirqd/0 Kdump: loaded Not tainted
5.19.0-rc1-seife #2 8f2caf59d69bf3bff9185834c09c651834367aaa
[17413.978703] Hardware name: Unknown Unknown Product/Unknown Product, BIOS
2022.04 04/01/2022
[17413.978710] pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[17413.978719] pc : percpu_ref_get_many+0x44/0xbc
[17413.978740] lr : percpu_ref_get_many+0x40/0xbc
[17413.978747] sp : ffff80000808bb50
[17413.978751] x29: ffff80000808bb50 x28: ffff1a1fc026c000 x27:
ffffbe8c31d3da00
[17413.978761] x26: ffffbe8c3154c008 x25: 0000000000000000 x24:
ffff1a1fc64fc000
[17413.978771] x23: ffff1a1fc50f2e00 x22: 0000000000000000 x21:
ffff1a1fc026c000
[17413.978780] x20: 0000000000000001 x19: ffff1a1fc18e5a00 x18:
0000000000000000
[17413.978790] x17: 0000000000000000 x16: ffffbe8c2fef4210 x15:
0000000000000000
[17413.978799] x14: 0000000000000000 x13: 0000000000000030 x12:
0101010101010101
[17413.978809] x11: ffff1a20bef53690 x10: fffffc687f08f6c8 x9 :
ffffbe8c30181294
[17413.978818] x8 : fffffc687f191c80 x7 : ffff1a1fc6598500 x6 :
0000000055555556
[17413.978828] x5 : 0000000000000001 x4 : 0000000000000007 x3 :
ffff5b948d9ef000
[17413.978837] x2 : 0000000000000000 x1 : ffff1a1fc026c000 x0 :
fffe75b44f2d4a00
[17413.978846] Call trace:
[17413.978852]  percpu_ref_get_many+0x44/0xbc
[17413.978861]  refill_obj_stock+0x6c/0x180
[17413.978868]  obj_cgroup_uncharge+0x20/0x2c
[17413.978875]  kmem_cache_free+0x304/0x3c4
[17413.978883]  __d_free+0x28/0x34
[17413.978891]  rcu_do_batch+0x174/0x6f0
[17413.978900]  rcu_core+0x264/0x3fc
[17413.978906]  rcu_core_si+0x1c/0x30
[17413.978912]  __do_softirq+0x128/0x3b8
[17413.978920]  run_ksoftirqd+0x6c/0x94
[17413.978928]  smpboot_thread_fn+0x230/0x254
[17413.978936]  kthread+0x114/0x120
[17413.978942]  ret_from_fork+0x10/0x20
[17413.978952] Code: 11000400 b90012a0 97fff700 8b000260 (c85f7c02) 
[17413.978968] SMP: stopping secondary CPUs
[17413.979013] Starting crashdump kernel...

I have also seen similar crashes during early system startup that I could not
investigate. Maybe I really have a config option missing or -rc1 is still not
stable enough.

I'll wait until 5.19-rc appears in Kernel:HEAD and continue testing then.