------------[ cut here ]------------
WARNING: mm/slub.c:7023 at __kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023, CPU#1: syz.8.4921/23689
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 23689 Comm: syz.8.4921 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a08>] (dump_backtrace) from [<80201afc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:8321c4bc r6:00000000 r5:82328334 r4:00000001
[<80201ae4>] (show_stack) from [<8021e804>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201ae4>] (show_stack) from [<8021e804>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e7a8>] (dump_stack_lvl) from [<8021e830>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:8321c4bc r6:00000000 r5:84283e80 r4:83483d7c
[<8021e818>] (dump_stack) from [<802026b8>] (vpanic+0x114/0x320 kernel/panic.c:651)
[<802025a4>] (vpanic) from [<802028f8>] (trace_suspend_resume+0x0/0x100 kernel/panic.c:788)
 r7:8055bf5c
[<802028c4>] (panic) from [<80251bdc>] (check_panic_on_warn kernel/panic.c:525 [inline])
[<802028c4>] (panic) from [<80251bdc>] (get_taint+0x0/0x1c kernel/panic.c:520)
 r3:8320b188 r2:00000001 r1:8230dea4 r0:82315828
[<80251b64>] (check_panic_on_warn) from [<80251d58>] (__warn+0x98/0x1a4 kernel/panic.c:1104)
[<80251cc0>] (__warn) from [<80251fdc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1136)
 r8:00000009 r7:8234d420 r6:df83dd74 r5:84283e80 r4:00000000
[<80251e68>] (warn_slowpath_fmt) from [<8055bf5c>] (__kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023)
 r10:000028c0 r9:ffffffff r8:00000000 r7:00000001 r6:ffffffff r5:00000cc0
 r4:ffffffff
[<8055bb68>] (__kvmalloc_node_noprof) from [<80c7f81c>] (init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline])
[<8055bb68>] (__kvmalloc_node_noprof) from [<80c7f81c>] (udmabuf_create+0x158/0x4e8 drivers/dma-buf/udmabuf.c:386)
 r10:df83ded0 r9:8a2a5f40 r8:874dab80 r7:00000001 r6:ffffffff r5:ffff0000
 r4:ffffffff
[<80c7f6c4>] (udmabuf_create) from [<80c8003c>] (udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:465 [inline])
[<80c7f6c4>] (udmabuf_create) from [<80c8003c>] (udmabuf_ioctl+0x1fc/0x258 drivers/dma-buf/udmabuf.c:496)
 r10:84283e80 r9:00000004 r8:874dab80 r7:20001d80 r6:b5403587 r5:ffffffff
 r4:fffff000
[<80c7fe40>] (udmabuf_ioctl) from [<805d3814>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80c7fe40>] (udmabuf_ioctl) from [<805d3814>] (do_vfs_ioctl fs/ioctl.c:551 [inline])
[<80c7fe40>] (udmabuf_ioctl) from [<805d3814>] (__do_sys_ioctl fs/ioctl.c:595 [inline])
[<80c7fe40>] (udmabuf_ioctl) from [<805d3814>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583)
 r6:40187542 r5:874dab81 r4:00000000
[<805d35d0>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf83dfa8 to 0xdf83dff0)
dfa0:                   00000000 00000000 00000004 40187542 20001d80 00000000
dfc0: 00000000 00000000 003563b0 00000036 00356378 00000000 00000001 76eeb0dc
dfe0: 76eeae88 76eeae78 0001903c 00130cf0
 r10:00000036 r9:84283e80 r8:8020029c r7:00000036 r6:003563b0 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..