_kmalloc_noprof include/linux/slab.h:969 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 vidtv_s302m_access_unit_init drivers/media/test-drivers/vidtv/vidtv_s302m.c:151 [inline]
 vidtv_s302m_alloc_au drivers/media/test-drivers/vidtv/vidtv_s302m.c:198 [inline]
 vidtv_s302m_encode+0x2dc/0x14c4 drivers/media/test-drivers/vidtv/vidtv_s302m.c:408
 vidtv_mux_poll_encoders drivers/media/test-drivers/vidtv/vidtv_mux.c:339 [inline]
 vidtv_mux_tick+0xf58/0x1b60 drivers/media/test-drivers/vidtv/vidtv_mux.c:416
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 4820 Comm: kworker/1:6 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: events vidtv_mux_tick
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : vidtv_s302m_encode+0x460/0x14c4 drivers/media/test-drivers/vidtv/vidtv_s302m.c:414
lr : vidtv_s302m_encode+0x440/0x14c4 drivers/media/test-drivers/vidtv/vidtv_s302m.c:410
sp : ffff8000943274e0
x29: ffff800094327640 x28: 1fffe0001f2471ed x27: ffff0000f9238f68
x26: dfff800000000000 x25: ffff0000f3680828 x24: 1fffe0001f2471e5
x23: ffff0000f9238f28 x22: ffff0000f482b300 x21: 0000000000000000
x20: ffff0000f9238f00 x19: 0000000000000000 x18: 1fffe00035bc9e28
x17: 70202c31206c6176 x16: 0000000000000001 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000003 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 00000000ffffffff x4 : 0000000000000dc0 x3 : 0000000000000dc0
x2 : 0000000000000028 x1 : ffff0000f29157c0 x0 : 0000000000000000
Call trace:
 vidtv_s302m_encode+0x460/0x14c4 drivers/media/test-drivers/vidtv/vidtv_s302m.c:414 (P)
 vidtv_mux_poll_encoders drivers/media/test-drivers/vidtv/vidtv_mux.c:339 [inline]
 vidtv_mux_tick+0xf58/0x1b60 drivers/media/test-drivers/vidtv/vidtv_mux.c:416
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
Code: 9100a280 973742d2 f94002f5 d343fea8 (38fa6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9100a280 	add	x0, x20, #0x28
   4:	973742d2 	bl	0xfffffffffcdd0b4c
   8:	f94002f5 	ldr	x21, [x23]
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	38fa6908 	ldrsb	w8, [x8, x26] <-- trapping instruction