------------[ cut here ]------------
WARNING: mm/slub.c:7023 at __kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023, CPU#1: syz.2.2455/13478
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 13478 Comm: syz.2.2455 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 r5:823283d8 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 r5:85b64b00 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)
 r7:8055c0a4
[<802028c4>] (panic) from [<80251c24>] (check_panic_on_warn kernel/panic.c:525 [inline])
[<802028c4>] (panic) from [<80251c24>] (get_taint+0x0/0x1c kernel/panic.c:520)
 r3:8320b188 r2:00000001 r1:8230df48 r0:823158cc
[<80251bac>] (check_panic_on_warn) from [<80251da0>] (__warn+0x98/0x1a4 kernel/panic.c:1104)
[<80251d08>] (__warn) from [<80252024>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1136)
 r8:00000009 r7:8234d4c4 r6:ea48dd74 r5:85b64b00 r4:00000000
[<80251eb0>] (warn_slowpath_fmt) from [<8055c0a4>] (__kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023)
 r10:000028c0 r9:ffffffff r8:00000000 r7:00000004 r6:ffffffff r5:00000cc0
 r4:ffffffff
[<8055bcb0>] (__kvmalloc_node_noprof) from [<80c7fab4>] (init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline])
[<8055bcb0>] (__kvmalloc_node_noprof) from [<80c7fab4>] (udmabuf_create+0x158/0x4e8 drivers/dma-buf/udmabuf.c:386)
 r10:869fce00 r9:86928b80 r8:86349e80 r7:00000004 r6:ffffffff r5:ffff0000
 r4:00000000
[<80c7f95c>] (udmabuf_create) from [<80c80258>] (udmabuf_ioctl_create_list drivers/dma-buf/udmabuf.c:484 [inline])
[<80c7f95c>] (udmabuf_create) from [<80c80258>] (udmabuf_ioctl+0x180/0x258 drivers/dma-buf/udmabuf.c:499)
 r10:85b64b00 r9:00000048 r8:86349e80 r7:20000d00 r6:869fce00 r5:86349e80
 r4:20000d00
[<80c800d8>] (udmabuf_ioctl) from [<805d3908>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80c800d8>] (udmabuf_ioctl) from [<805d3908>] (do_vfs_ioctl fs/ioctl.c:551 [inline])
[<80c800d8>] (udmabuf_ioctl) from [<805d3908>] (__do_sys_ioctl fs/ioctl.c:595 [inline])
[<80c800d8>] (udmabuf_ioctl) from [<805d3908>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583)
 r6:40087543 r5:86349e81 r4:00000000
[<805d36c4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xea48dfa8 to 0xea48dff0)
dfa0:                   00000000 00000000 00000048 40087543 20000d00 00000000
dfc0: 00000000 00000000 00356310 00000036 003562d8 00000000 00000001 76f3b0dc
dfe0: 76f3ae88 76f3ae78 0001903c 00130cf0
 r10:00000036 r9:85b64b00 r8:8020029c r7:00000036 r6:00356310 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..