--- cut here ---
[   66.149597] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when write
[   66.158752] [00000000] *pgd=80000080204003, *pmd=00000000
[   66.164184] Internal error: Oops: a05 [#1] SMP ARM
[   66.169006] Modules linked in: test_vmalloc(+) snd_soc_simple_card etnaviv snd_soc_simple_card_utils omapdrm gpu_sched ahci_dwc onboard_usb_dev snd_soc_tlv320aic3x_i2c snd_soc_davinci_mcasp snd_soc_ti_sdma snd_soc_ti_udma snd_soc_tlv320aic3x snd_soc_ti_edma snd_soc_core ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd soundcore ti_tpd12s015 omap_remoteproc display_connector nfnetlink ip_tables x_tables
[   66.204895] CPU: 0 UID: 0 PID: 1273 Comm: vmalloc_test/0 Tainted: G        W           6.15.0-next-20250529 #1 NONE 
[   66.215484] Tainted: [W]=WARN
[   66.218444] Hardware name: Generic DRA74X (Flattened Device Tree)
[   66.224578] PC is at vm_map_ram_test+0x98/0x4c0 [test_vmalloc]
[   66.230438] LR is at vm_map_ram+0x14c/0xa80
[   66.234649] pc : [<bf08bbd8>]    lr : [<c06a90f0>]    psr: 200e0013
[   66.240936] sp : f2c19ef0  ip : f1400000  fp : 0000000f
[   66.246185] r10: 65c63fdb  r9 : bf093004  r8 : 00000001
[   66.251434] r7 : 00000061  r6 : 00000000  r5 : c75d6c40  r4 : 00000001
[   66.257995] r3 : 600e0013  r2 : 000048dc  r1 : 00000001  r0 : 00000000
[   66.264556] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   66.271728] Control: 30c5387d  Table: 842196c0  DAC: fffffffd
[   66.277496] Register r0 information: NULL pointer
[   66.282226] Register r1 information: non-paged memory
[   66.287292] Register r2 information: non-paged memory
[   66.292388] Register r3 information: non-paged memory
[   66.297454] Register r4 information: non-paged memory
[   66.302520] Register r5 information: slab kmalloc-64 start c75d6c40 pointer offset 0 size 64
[   66.311035] Register r6 information: NULL pointer
[   66.315765] Register r7 information: non-paged memory
[   66.320831] Register r8 information: non-paged memory
[   66.325897] Register r9 information: 1-page vmalloc region starting at 0xbf093000 allocated at load_module+0xcf8/0x19c4
[   66.336730] Register r10 information: non-paged memory
[   66.341918] Register r11 information: non-paged memory
[   66.347076] Register r12 information: 0-page vmalloc region starting at 0xf1400000 allocated at __devm_ioremap_resource+0x180/0x1f0
[   66.358947] Process vmalloc_test/0 (pid: 1273, stack limit = 0x906b087f)
[   66.365692] Stack: (0xf2c19ef0 to 0xf2c1a000)
[   66.370056] 9ee0:                                     c75d6c40 6193099b bf08bb40 c5209c08
[   66.378265] 9f00: 00000000 c5209c0c 0000000a bf093000 0000000f bf08b37c c57b3780 c5209c00
[   66.386505] 9f20: 8d4fdf3b 83126e97 c5209c10 00000008 00000000 00000006 00000007 00000000
[   66.394714] 9f40: 00000005 00000002 00000004 00000001 00000008 0000000a 00000003 00000009
[   66.402923] 9f60: 7927b27b c57b5850 c5225c00 c5225c00 f2bfdb38 bf08b100 c5209c00 00000000
[   66.411132] 9f80: 00000000 c0493358 00000000 00000000 c47e8300 c0493260 00000000 00000000
[   66.419342] 9fa0: 00000000 00000000 00000000 c040029c 00000000 00000000 00000000 00000000
[   66.427551] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   66.435791] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[   66.444000] Call trace: 
[   66.444000]  vm_map_ram_test [test_vmalloc] from test_func+0x27c/0x3c4 [test_vmalloc]
[   66.454406]  test_func [test_vmalloc] from kthread+0xf8/0x2d8
[   66.460205]  kthread from ret_from_fork+0x14/0x38
[   66.464935] Exception stack(0xf2c19fb0 to 0xf2c19ff8)
[   66.470001] 9fa0:                                     00000000 00000000 00000000 00000000
[   66.478210] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   66.486419] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   66.493072] Code: e1a01004 e3e02000 eb5874f3 e1a01004 (e5c07000) 
[   66.499267] ---[ end trace 0000000000000000 ]---

------------[ cut here ]------------
[   41.638885] WARNING: CPU: 0 PID: 683 at mm/highmem.c:622 kunmap_local_indexed+0x198/0x1a4
[   41.647125] Modules linked in: snd_soc_simple_card etnaviv snd_soc_simple_card_utils omapdrm gpu_sched ahci_dwc onboard_usb_dev snd_soc_tlv320aic3x_i2c snd_soc_davinci_mcasp snd_soc_ti_sdma snd_soc_ti_udma snd_soc_tlv320aic3x snd_soc_ti_edma snd_soc_core ac97_bus snd_pcm_dmaengine snd_pcm snd_timer snd soundcore ti_tpd12s015 omap_remoteproc display_connector nfnetlink ip_tables x_tables
[   41.681762] CPU: 0 UID: 0 PID: 683 Comm: uffd-unit-tests Not tainted 6.15.0-next-20250529 #1 NONE 
[   41.681762] Hardware name: Generic DRA74X (Flattened Device Tree)
[   41.681762] Call trace: 
[   41.681793]  unwind_backtrace from show_stack+0x10/0x14
[   41.681793]  show_stack from dump_stack_lvl+0x50/0x5c
[   41.681823]  dump_stack_lvl from __warn+0xd8/0x1e0
[   41.681823]  __warn from warn_slowpath_fmt+0xa8/0x174
[   41.681823]  warn_slowpath_fmt from kunmap_local_indexed+0x198/0x1a4
[   41.681854]  kunmap_local_indexed from move_pages_pte+0xd14/0xe34
[   41.681854]  move_pages_pte from move_pages+0x428/0x5bc
[   41.681854]  move_pages from userfaultfd_ioctl+0x900/0x1ec0
[   41.681884]  userfaultfd_ioctl from sys_ioctl+0xd24/0xd90
[   41.681884]  sys_ioctl from ret_fast_syscall+0x0/0x5c
[   41.681884] Exception stack(0xf278dfa8 to 0xf278dff0)
[   41.681915] dfa0:                   00001000 00000005 00000005 c028aa05 b2d1ecd8 b2d1ecc8
[   41.681915] dfc0: 00001000 00000005 b2d1ece0 00000036 b2d1ed84 b2d1ed50 b2d1ed7c b2d1ed58
[   41.681915] dfe0: 00000036 b2d1ecb0 b6dd1861 b6d3f736
[   41.681915] ---[ end trace 0000000000000000 ]---

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