Subject: [Bug 216041] New: Stack overflow at boot (do_IRQ: stack overflow: 1984) on a PowerMac G4 DP, KASAN debug build

From: [email-masked]
Date: Sat, 28 May 2022 11:43:04 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=216041

            Bug ID: 216041
           Summary: Stack overflow at boot (do_IRQ: stack overflow: 1984)
                    on a PowerMac G4 DP, KASAN debug build
           Product: Platform Specific/Hardware
           Version: 2.5
    Kernel Version: 5.18.0
          Hardware: PPC-32
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: PPC-32
          Assignee: [email-masked]
          Reporter: [email-masked]
        Regression: No

Created attachment 301065
  --> https://bugzilla.kernel.org/attachment.cgi?id=301065&action=edit
dmesg (5.18.0, PowerMac G4 DP), case 1

The attached v5.18 kernel .config triggers this stack overflow pretty easy on
my G4 DP. It does not show up on every boot but very often. The overflow
usually happens after the radeon drm gets loaded.

Don't know whether it's the same issue as bug #207129 but here the KASAN +
debug output looks more useful.

[...]
[drm] radeon: irq initialized.
[drm] Loading R300 Microcode
Loading firmware: radeon/R300_cp.bin
do_IRQ: stack overflow: 1984
CPU: 0 PID: 126 Comm: systemd-udevd Not tainted 5.18.0-gentoo-PMacG4 #1
Call Trace:
Oops: Kernel stack overflow, sig: 11 [#1]
BE PAGE_SIZE=4K MMU=Hash SMP NR_CPUS=2 PowerMac
Modules linked in: sr_mod cdrom radeon(+) ohci_pci(+) hwmon i2c_algo_bit
drm_ttm_helper ttm drm_dp_helper snd_aoa_i2sbus snd_aoa_soundbus snd_pcm
ehci_pci snd_timer ohci_hcd snd ssb ehci_hcd 8250_pci soundcore drm_kms_helper
pcmcia 8250 pcmcia_core syscopyarea usbcore sysfillrect 8250_base sysimgblt
serial_mctrl_gpio fb_sys_fops usb_common pkcs8_key_parser fuse drm
drm_panel_orientation_quirks configfs
CPU: 0 PID: 126 Comm: systemd-udevd Not tainted 5.18.0-gentoo-PMacG4 #1
NIP:  c02e5558 LR: c07eb3bc CTR: c07f46a8
REGS: e7fe9f50 TRAP: 0000   Not tainted  (5.18.0-gentoo-PMacG4)
MSR:  00001032 <ME,IR,DR,RI>  CR: 44a14824  XER: 20000000

GPR00: c07eb3bc eaa1c000 c26baea0 eaa1c0a0 00000008 00000000 c07eb3bc eaa1c010 
GPR08: eaa1c0a8 04f3f3f3 f1f1f1f1 c07f4c84 44a14824 0080f7e4 00000005 00000010 
GPR16: 00000025 eaa1c154 eaa1c158 c0dbad64 00000020 fd543810 eaa1c0a0 eaa1c29e 
GPR24: c0dbad44 c0db8740 05ffffff fd543802 eaa1c150 c0c9a3c0 eaa1c0a0 c0c9a3c0 
NIP [c02e5558] kasan_check_range+0xc/0x2b4
LR [c07eb3bc] format_decode+0x80/0x604
Call Trace:
[eaa1c000] [c07eb3bc] format_decode+0x80/0x604 (unreliable)
[eaa1c070] [c07f4dac] vsnprintf+0x128/0x938
[eaa1c110] [c07f5788] sprintf+0xa0/0xc0
[eaa1c180] [c0154c1c] __sprint_symbol.constprop.0+0x170/0x198
[eaa1c230] [c07ee71c] symbol_string+0xf8/0x260
[eaa1c430] [c07f46d0] pointer+0x15c/0x710
[eaa1c4b0] [c07f4fbc] vsnprintf+0x338/0x938
[eaa1c550] [c00e8fa0] vprintk_store+0x2a8/0x678
[eaa1c690] [c00e94e4] vprintk_emit+0x174/0x378
[eaa1c6d0] [c00ea008] _printk+0x9c/0xc0
[eaa1c750] [c000ca94] show_stack+0x21c/0x260
[eaa1c7a0] [c07d0bd4] dump_stack_lvl+0x60/0x90
[eaa1c7c0] [c0009234] __do_IRQ+0x170/0x174
[eaa1c800] [c0009258] do_IRQ+0x20/0x34
[eaa1c820] [c00045b4] HardwareInterrupt_virt+0x108/0x10c
--- interrupt: 500 at finish_task_switch.isra.0+0x130/0x3a8
NIP:  c00a3c9c LR: c00a3c88 CTR: c036560c
REGS: eaa1c830 TRAP: 0500   Not tainted  (5.18.0-gentoo-PMacG4)
MSR:  0220b032 <VEC,EE,FP,ME,IR,DR,RI>  CR: 22882848  XER: 20000000

GPR00: c00a3c88 eaa1c8e0 c26baea0 e6dcf2a0 c0c59b28 ea18df50 c002a268 c2fd1470 
GPR08: 00000003 0200b032 00000000 00000001 22004868 0080f7e4 92e60efc c88833b4 
GPR16: 00000000 c88833c0 00000003 25c84000 00000006 e6dcf82c d82c68a0 00000000 
GPR24: 25c84000 00000000 c2fd0bc0 c0c59b2c c114b2a0 e6dcf2a0 00000000 00000000 
NIP [c00a3c9c] finish_task_switch.isra.0+0x130/0x3a8
LR [c00a3c88] finish_task_switch.isra.0+0x11c/0x3a8
--- interrupt: 500
[eaa1c920] [c0c59b2c] __schedule+0x3f0/0x9dc
[eaa1c9b0] [c0c5a18c] schedule+0x74/0x13c
[eaa1c9d0] [c0c5a2e4] io_schedule+0x54/0x8c
[eaa1c9f0] [c0c5af0c] bit_wait_io+0x18/0x94
[eaa1ca10] [c0c5a8a0] __wait_on_bit+0x100/0x28c
[eaa1ca60] [c0c5aaf4] out_of_line_wait_on_bit+0xc8/0xf0
[eaa1cae0] [c0494d38] ext4_read_bh+0x184/0x1a8
[eaa1cb10] [c0428bd4] __read_extent_tree_block+0x1a4/0x2d0
[eaa1cb50] [c042ade4] ext4_find_extent+0x270/0x5a4
[eaa1cbb0] [c04302b8] ext4_ext_map_blocks+0x11c/0x1d8c
[eaa1cdd0] [c0452f14] ext4_map_blocks+0x3f0/0x950
[eaa1ce90] [c0454890] ext4_getblk+0x2e8/0x3cc
[eaa1cf30] [c0454988] ext4_bread+0x14/0x110
[eaa1cf50] [c047d538] __ext4_read_dirblock+0x4c/0x52c
[eaa1cf90] [c047da8c] dx_probe+0x74/0x95c
[eaa1cff0] [c0480ed0] __ext4_find_entry+0x6c0/0x9b4
[eaa1d120] [c04812d4] ext4_lookup+0x110/0x3c0
[eaa1d1d0] [c0326524] __lookup_slow+0x10c/0x25c
[eaa1d240] [c032d1f8] walk_component+0x220/0x30c
[eaa1d2d0] [c032d6a0] link_path_walk.part.0.constprop.0+0x3bc/0x608
usb usb6: New USB device found, idVendor=1d6b, idProduct=0001, bcdDevice= 5.18

[eaa1d380] [c032e384] path_openat+0x1b4/0x1648
usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[eaa1d490] [c03310e8] do_file_open_root+0x168/0x288
[eaa1d5c0] [c03095f8] file_open_root+0x150/0x234
usb usb6: Product: OHCI PCI host controller

usb usb6: Manufacturer: Linux 5.18.0-gentoo-PMacG4 ohci_hcd
[eaa1d640] [c037e688] kernel_read_file_from_path_initns+0x140/0x204
[eaa1d6d0] [c08f7614] _request_firmware+0x970/0xae8
usb usb6: SerialNumber: 0001:10:1b.1

[eaa1d7c0] [c08f77d8] request_firmware+0x4c/0x78
[eaa1d7e0] [befd63e0] r100_cp_init+0x590/0x608 [radeon]
[eaa1d810] [befe0310] r300_startup.constprop.0+0x3b0/0x458 [radeon]
[eaa1d840] [befe0854] r300_init+0x19c/0x368 [radeon]
[eaa1d860] [bef79e3c] radeon_device_init+0x930/0x10ac [radeon]
[eaa1d8c0] [bef7c0b0] radeon_driver_load_kms+0xf4/0x2b8 [radeon]
[eaa1d900] [bec82498] drm_dev_register+0x15c/0x3ac [drm]
[eaa1d940] [bef77620] radeon_pci_probe+0x13c/0x178 [radeon]
[eaa1d970] [c0829080] pci_device_probe+0x100/0x238
[eaa1d9a0] [c08da164] really_probe.part.0+0x108/0x428
[eaa1d9d0] [c08da578] __driver_probe_device+0xf4/0x1ac
[eaa1d9f0] [c08da69c] driver_probe_device+0x6c/0x150
[eaa1da20] [c08db100] __driver_attach+0xec/0x200
[eaa1da50] [c08d63e8] bus_for_each_dev+0xf8/0x164
[eaa1dac0] [c08d8dec] bus_add_driver+0x274/0x31c
[eaa1db00] [c08dbee4] driver_register+0x114/0x258
[eaa1db30] [c0007b84] do_one_initcall+0xb0/0x318
[eaa1dc00] [c014eff4] do_init_module+0xfc/0x3e0
[eaa1dc30] [c0152aec] load_module+0x36d8/0x3d1c
[eaa1de60] [c01534bc] sys_finit_module+0x114/0x170
[eaa1df40] [c001f1a8] ret_from_syscall+0x0/0x2c
--- interrupt: c00 at 0xa7e17acc
NIP:  a7e17acc LR: 003d8538 CTR: a7d9dac0
REGS: eaa1df50 TRAP: 0c00   Not tainted  (5.18.0-gentoo-PMacG4)
MSR:  0000d032 <EE,PR,ME,IR,DR,RI>  CR: 24222448  XER: 00000000

GPR00: 00000161 afd91980 a7f5a560 00000018 003e41a8 00000000 00000018 00000000 
GPR08: 00000000 00000008 00000000 a7e8a44c a7d209ec 0080f7e4 00000000 00000000 
GPR16: 009cea00 00000000 0aba9500 009cea00 00000000 afd91b3c 00968570 00000000 
GPR24: 009cea00 00000007 009cf6c0 003e41a8 00020000 00000000 00404cb8 009cea00 
NIP [a7e17acc] 0xa7e17acc
LR [003d8538] 0x3d8538
--- interrupt: c00
Instruction dump:
80010024 8361000c 83c10018 83810010 7c0803a6 83a10014 83e1001c 38210020 
4e800020 2c040000 41820260 7d032214 <9421fff0> 7c034040 41810154 3d40b000 
---[ end trace 0000000000000000 ]---

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