--- cut here ---
[  279.174791] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when write
[  279.174899] [00000000] *pgd=80000040204003, *pmd=00000000
[  279.175587] Internal error: Oops: a05 [#1] SMP ARM
[  279.182058] Modules linked in: test_vmalloc(+) fuse
[  279.183612] CPU: 0 UID: 0 PID: 1221 Comm: vmalloc_test/0 Tainted: G        W           6.16.0-rc2-next-20250618 #1 NONE 
[  279.184198] Tainted: [W]=WARN
[  279.184447] Hardware name: Generic DT based system
[  279.184788] PC is at vm_map_ram_test+0xcc/0xf0 [test_vmalloc]
[  279.185150] LR is at 0xfa3d5e60
[  279.185384] pc : [<bf02d5c8>]    lr : [<fa3d5e60>]    psr: 600e0013
[  279.185554] sp : fa3d5ee8  ip : edbd7e50  fp : c43e10a0
[  279.185698] r10: feb426b0  r9 : 00000061  r8 : c48754c0
[  279.185841] r7 : 00000001  r6 : bf02f000  r5 : 00000001  r4 : 00000001
[  279.186012] r3 : c425c440  r2 : 00000000  r1 : 00000001  r0 : 00000000
[  279.186252] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  279.186765] Control: 30c5387d  Table: 444260c0  DAC: fffffffd
[  279.187264] Register r0 information: NULL pointer
[  279.187917] Register r1 information: non-paged memory
[  279.188348] Register r2 information: NULL pointer
[  279.188683] Register r3 information: slab task_struct start c425c440 pointer offset 0 size 2496
[  279.189715] Register r4 information: non-paged memory
[  279.190045] Register r5 information: non-paged memory
[  279.190368] Register r6 information: 1-page vmalloc region starting at 0xbf02f000 allocated at load_module+0x7b0/0x1d5c
[  279.191159] Register r7 information: non-paged memory
[  279.191503] Register r8 information: slab kmalloc-64 start c48754c0 pointer offset 0 size 64
[  279.192345] Register r9 information: non-paged memory
[  279.192838] Register r10 information: 1-page vmalloc region starting at 0xfeb43000 allocated at kvfree_rcu_2_arg_vmalloc_test+0x28/0x58 [test_vmalloc]
[  279.194229] Register r11 information: slab kmalloc-192 start c43e1000 pointer offset 160 size 192
[  279.194765] Register r12 information: non-slab/vmalloc memory
[  279.195010] Process vmalloc_test/0 (pid: 1221, stack limit = 0xdb83593f)
[  279.195998] Stack: (0xfa3d5ee8 to 0xfa3d6000)
[  279.196481] 5ee0:                   c48754c0 c051b478 bf02d308 bf02d4fc 0000000a bf02f000
[  279.197094] 5f00: fa3d5f54 fa3d5f5c 00000000 bf02d6ec 000256a0 00000000 c43e1000 00000040
[  279.197658] 5f20: bf031238 bf02f400 c248ad20 0ea11fed 00000002 00000004 00000005 00000006
[  279.198125] 5f40: 00000000 00000009 00000008 00000001 0000000a 00000003 00000007 0de273bf
[  279.198765] 5f60: c43e1000 00000001 c4063000 c425c440 c4063000 bf02d5ec c43e1000 00000000
[  279.199126] 5f80: 00000000 c048c48c 00000000 0de273bf c43bf3c0 c048c378 00000000 00000000
[  279.199531] 5fa0: 00000000 00000000 00000000 c0400254 00000000 00000000 00000000 00000000
[  279.199879] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  279.200469] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[  279.201066] Call trace: 
[  279.201386]  vm_map_ram_test [test_vmalloc] from test_func+0x100/0x2d8 [test_vmalloc]
[  279.201789]  test_func [test_vmalloc] from kthread+0x114/0x240
[  279.202034]  kthread from ret_from_fork+0x14/0x20
[  279.202166] Exception stack(0xfa3d5fb0 to 0xfa3d5ff8)
[  279.202288] 5fa0:                                     00000000 00000000 00000000 00000000
[  279.203436] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  279.204460] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[  279.205333] Code: e1a00008 e2844001 eb5a38cb e1a01005 (e5c09000) 
[  279.207133] ---[ end trace 0000000000000000 ]---

------------[ cut here ]------------
[   73.208713] WARNING: mm/highmem.c:622 at kunmap_local_indexed+0x178/0x17c, CPU#0: uffd-unit-tests/631
[   73.211018] Modules linked in: fuse
[   73.212580] CPU: 0 UID: 0 PID: 631 Comm: uffd-unit-tests Not tainted 6.16.0-rc2-next-20250618 #1 NONE 
[   73.213009] Hardware name: Generic DT based system
[   73.214122] Call trace: 
[   73.214358]  unwind_backtrace from show_stack+0x18/0x1c
[   73.214686]  show_stack from dump_stack_lvl+0x6c/0x8c
[   73.214829]  dump_stack_lvl from __warn+0x98/0x14c
[   73.215116]  __warn from warn_slowpath_fmt+0x18c/0x194
[   73.215351]  warn_slowpath_fmt from kunmap_local_indexed+0x178/0x17c
[   73.215650]  kunmap_local_indexed from move_pages+0x83c/0x19c8
[   73.215812]  move_pages from userfaultfd_ioctl+0x12d4/0x2070
[   73.216171]  userfaultfd_ioctl from sys_ioctl+0x558/0xd24
[   73.216454]  sys_ioctl from ret_fast_syscall+0x0/0x1c
[   73.216679] Exception stack(0xf9e39fa8 to 0xf9e39ff0)
[   73.217103] 9fa0:                   00001000 00000000 00000005 c028aa05 b2e1ecd8 b2e1ecb0
[   73.217518] 9fc0: 00001000 00000000 00000005 00000036 8010aa01 004a0000 b2e1ed80 00000012
[   73.217712] 9fe0: 00000036 b2e1ec98 b6ed1861 b6e3f736
[   73.218829] ---[ end trace 0000000000000000 ]---

(no logs available)

(no logs available)

(no logs available)

(no logs available)