--- cut here ---
[  289.565586] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when write
[  289.565810] [00000000] *pgd=80000040204003, *pmd=00000000
[  289.567263] Internal error: Oops: a05 [#1] SMP ARM
[  289.568123] Modules linked in: test_vmalloc(+) fuse
[  289.568843] CPU: 1 UID: 0 PID: 1220 Comm: vmalloc_test/0 Tainted: G        W           6.16.0-rc2-next-20250620 #1 NONE 
[  289.569696] Tainted: [W]=WARN
[  289.569989] Hardware name: Generic DT based system
[  289.570400] PC is at vm_map_ram_test+0xcc/0xf0 [test_vmalloc]
[  289.571017] LR is at 0xfa3f9e60
[  289.571481] pc : [<bf02d5c8>]    lr : [<fa3f9e60>]    psr: 600e0013
[  289.572355] sp : fa3f9ee8  ip : edbeae50  fp : c4341760
[  289.573187] r10: 6948f430  r9 : 00000061  r8 : c4d01080
[  289.573418] r7 : 00000001  r6 : bf02f000  r5 : 00000001  r4 : 00000001
[  289.573852] r3 : c441f500  r2 : 00000000  r1 : 00000001  r0 : 00000000
[  289.574940] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[  289.575545] Control: 30c5387d  Table: 44392800  DAC: 00000000
[  289.576081] Register r0 information: NULL pointer
[  289.577814] Register r1 information: non-paged memory
[  289.578076] Register r2 information: NULL pointer
[  289.578432] Register r3 information: slab task_struct start c441f500 pointer offset 0 size 2496
[  289.579488] systemd-journald[89]: Failed to sync system journal, ignoring: Resource temporarily unavailable
[  289.580320] Register r4 information: non-paged memory
[  289.581052] Register r5 information: non-paged memory
[  289.581586] Register r6 information: 1-page vmalloc region starting at 0xbf02f000 allocated at load_module+0x7b0/0x1d5c
[  289.583122] Register r7 information: non-paged memory
[  289.583387] Register r8 information: slab kmalloc-64 start c4d01080 pointer offset 0 size 64
[  289.584027] Register r9 information: non-paged memory
[  289.584628] Register r10 information: non-paged memory
[  289.585280] Register r11 information: slab kmalloc-192 start c43416c0 pointer offset 160 size 192
[  289.586319] Register r12 information: non-slab/vmalloc memory
[  289.586730] Process vmalloc_test/0 (pid: 1220, stack limit = 0x5d16a092)
[  289.587628] Stack: (0xfa3f9ee8 to 0xfa3fa000)
[  289.589145] 9ee0:                   c4d01080 c051b450 bf02d0bc bf02d4fc 0000000a bf02f000
[  289.589754] 9f00: fa3f9f48 fa3f9f5c 00000000 bf02d6ec 0001ac00 00000000 c43416c0 00000043
[  289.590031] 9f20: bf031238 bf02f400 c248aba0 dfe82b63 00000006 00000007 00000001 00000009
[  289.590413] 9f40: 00000002 0000000a 00000008 00000003 00000005 00000000 00000004 6bd59e74
[  289.590865] 9f60: c43416c0 00000001 c3fac300 c441f500 c3fac300 bf02d5ec c43416c0 00000000
[  289.590865] systemd-journald[89]: Failed to sync system journal, ignoring: Resource temporarily unavailable
[  289.593150] 9f80: 00000000 c048c460 00000000 6bd59e74 c4393940 c048c34c 00000000 00000000
[  289.594304] 9fa0: 00000000 00000000 00000000 c0400254 00000000 00000000 00000000 00000000
[  289.595087] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  289.595732] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[  289.596895] Call trace: 
[  289.597217]  vm_map_ram_test [test_vmalloc] from test_func+0x100/0x2d8 [test_vmalloc]
[  289.598140]  test_func [test_vmalloc] from kthread+0x114/0x240
[  289.598687]  kthread from ret_from_fork+0x14/0x20
[  289.598974] Exception stack(0xfa3f9fb0 to 0xfa3f9ff8)
[  289.599752] 9fa0:                                     00000000 00000000 00000000 00000000
[  289.600578] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  289.600955] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[  289.601618] Code: e1a00008 e2844001 eb5a3907 e1a01005 (e5c09000) 
[  289.603117] systemd-journald[89]: Failed to sync system journal, ignoring: Resource temporarily unavailable
[  289.604735] ---[ end trace 0000000000000000 ]---

------------[ cut here ]------------
[   95.461192] WARNING: mm/highmem.c:622 at kunmap_local_indexed+0x178/0x17c, CPU#0: uffd-unit-tests/630
[   95.464517] Modules linked in: fuse
[   95.466425] CPU: 0 UID: 0 PID: 630 Comm: uffd-unit-tests Not tainted 6.16.0-rc2-next-20250620 #1 NONE 
[   95.466979] Hardware name: Generic DT based system
[   95.467450] Call trace: 
[   95.467848]  unwind_backtrace from show_stack+0x18/0x1c
[   95.468355]  show_stack from dump_stack_lvl+0x6c/0x8c
[   95.468588]  dump_stack_lvl from __warn+0x98/0x14c
[   95.468758]  __warn from warn_slowpath_fmt+0x18c/0x194
[   95.469074]  warn_slowpath_fmt from kunmap_local_indexed+0x178/0x17c
[   95.469317]  kunmap_local_indexed from move_pages+0x83c/0x19c8
[   95.469581]  move_pages from userfaultfd_ioctl+0x12d4/0x2070
[   95.469822]  userfaultfd_ioctl from sys_ioctl+0x558/0xd24
[   95.470078]  sys_ioctl from ret_fast_syscall+0x0/0x1c
[   95.470413] Exception stack(0xf9d51fa8 to 0xf9d51ff0)
[   95.470786] 1fa0:                   00001000 00000000 00000005 c028aa05 b2dbecd8 b2dbecb0
[   95.471085] 1fc0: 00001000 00000000 00000005 00000036 8010aa01 004c0000 b2dbed80 00000012
[   95.471365] 1fe0: 00000036 b2dbec98 b6e71861 b6ddf736
[   95.472397] ---[ end trace 0000000000000000 ]---

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