Unable to handle kernel NULL pointer dereference at virtual address 0000000000000d40
Oops [#1]
Modules linked in:
CPU: 0 PID: 2867 Comm: ln Not tainted 5.14.0-syzkaller #0
Hardware name: riscv-virtio,qemu (DT)
epc : slab_alloc_node mm/slub.c:2900 [inline]
epc : slab_alloc mm/slub.c:2967 [inline]
epc : __kmalloc+0xce/0x388 mm/slub.c:4111
 ra : slab_pre_alloc_hook mm/slab.h:494 [inline]
 ra : slab_alloc_node mm/slub.c:2880 [inline]
 ra : slab_alloc mm/slub.c:2967 [inline]
 ra : __kmalloc+0x6e/0x388 mm/slub.c:4111
epc : ffffffff803e3568 ra : ffffffff803e3508 sp : ffffffe0091ff7c0
 gp : ffffffff83f967d8 tp : ffffffe00bd1af80 t0 : ffffffc40176ba00
 t1 : 0000000000000001 t2 : 0000000000000018 s0 : ffffffe0091ff860
 s1 : ffffffe005601640 a0 : 0000000000000000 a1 : ffffffe0091ffbac
 a2 : 1ffffffc017a3717 a3 : 0000000000000d40 a4 : 0000000000000001
 a5 : ffffffff82e4b2b0 a6 : 0000000000f00000 a7 : ffffffff8038ca52
 s2 : ffffffff83f96adc s3 : 0000000000000d40 s4 : 0000000000000024
 s5 : ffffffff8080a860 s6 : ffffffff83f9a0d0 s7 : 0000000000000000
 s8 : 0000000000000d40 s9 : 0000000000000001 s10: ffffffe009d9af88
 s11: 000000000000002f t3 : e7fceae755788800 t4 : ffffffc40123ff0f
 t5 : ffffffc40123ff11 t6 : ffffffe00bb5cffe
status: 0000000000000120 badaddr: 0000000000000d40 cause: 000000000000000d
[<ffffffff803e3568>] slab_alloc_node mm/slub.c:2900 [inline]
[<ffffffff803e3568>] slab_alloc mm/slub.c:2967 [inline]
[<ffffffff803e3568>] __kmalloc+0xce/0x388 mm/slub.c:4111
[<ffffffff8080a860>] kmalloc include/linux/slab.h:596 [inline]
[<ffffffff8080a860>] kzalloc include/linux/slab.h:721 [inline]
[<ffffffff8080a860>] tomoyo_encode2.part.0+0xf0/0x262 security/tomoyo/realpath.c:45
[<ffffffff8080abc2>] tomoyo_encode2 security/tomoyo/realpath.c:31 [inline]
[<ffffffff8080abc2>] tomoyo_encode security/tomoyo/realpath.c:80 [inline]
[<ffffffff8080abc2>] tomoyo_realpath_from_path+0x14c/0x3f4 security/tomoyo/realpath.c:288
[<ffffffff80804010>] tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
[<ffffffff80804010>] tomoyo_check_open_permission+0x1bc/0x288 security/tomoyo/file.c:771
[<ffffffff8080c23a>] tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
[<ffffffff8080c23a>] tomoyo_file_open+0x78/0x7c security/tomoyo/tomoyo.c:306
[<ffffffff807eb766>] security_file_open+0x4c/0x2fa security/security.c:1634
[<ffffffff804228da>] do_dentry_open+0x1c6/0x7d4 fs/open.c:813
[<ffffffff80425bb8>] vfs_open+0x52/0x5e fs/open.c:949
[<ffffffff8044b89a>] do_open fs/namei.c:3374 [inline]
[<ffffffff8044b89a>] path_openat+0x11ae/0x1694 fs/namei.c:3507
[<ffffffff8044efda>] do_filp_open+0xac/0x1a8 fs/namei.c:3534
[<ffffffff804262be>] do_sys_openat2+0x102/0x26a fs/open.c:1204
[<ffffffff80426abe>] do_sys_open fs/open.c:1220 [inline]
[<ffffffff80426abe>] __do_sys_openat fs/open.c:1236 [inline]
[<ffffffff80426abe>] sys_openat+0x80/0xee fs/open.c:1231
[<ffffffff80005150>] ret_from_syscall+0x0/0x2
---[ end trace ad218eabbab7d000 ]---