------------[ cut here ]------------
WARNING: mm/slub.c:7023 at __kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023, CPU#0: syz.4.12326/17387
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 17387 Comm: syz.4.12326 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 r5:823282c0 r4:00000001
[<80201ae4>] (show_stack) from [<8021e83c>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201ae4>] (show_stack) from [<8021e83c>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e7e0>] (dump_stack_lvl) from [<8021e868>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:8321c4bc r6:00000000 r5:841a3200 r4:83483d7c
[<8021e850>] (dump_stack) from [<802026b8>] (vpanic+0x114/0x320 kernel/panic.c:651)
[<802025a4>] (vpanic) from [<802028f8>] (trace_suspend_resume+0x0/0x100 kernel/panic.c:788)
 r7:8055bf54
[<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 r1:8230de30 r0:823157b4
[<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 r7:8234d3ac r6:dfc75d74 r5:841a3200 r4:00000000
[<80251e68>] (warn_slowpath_fmt) from [<8055bf54>] (__kvmalloc_node_noprof+0x3f4/0x530 mm/slub.c:7023)
 r10:000028c0 r9:ffffffff r8:00000000 r7:00000001 r6:ffffffff r5:00000cc0
 r4:ffffffff
[<8055bb60>] (__kvmalloc_node_noprof) from [<80c7f914>] (init_udmabuf drivers/dma-buf/udmabuf.c:193 [inline])
[<8055bb60>] (__kvmalloc_node_noprof) from [<80c7f914>] (udmabuf_create+0x158/0x4e8 drivers/dma-buf/udmabuf.c:386)
 r10:dfc75ed0 r9:8cded440 r8:840be900 r7:00000001 r6:ffffffff r5:ffff0000
 r4:ffffffff
[<80c7f7bc>] (udmabuf_create) from [<80c80134>] (udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:465 [inline])
[<80c7f7bc>] (udmabuf_create) from [<80c80134>] (udmabuf_ioctl+0x1fc/0x258 drivers/dma-buf/udmabuf.c:496)
 r10:841a3200 r9:00000003 r8:840be900 r7:20000040 r6:b5403587 r5:00010000
 r4:00000000
[<80c7ff38>] (udmabuf_ioctl) from [<805d380c>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80c7ff38>] (udmabuf_ioctl) from [<805d380c>] (do_vfs_ioctl fs/ioctl.c:551 [inline])
[<80c7ff38>] (udmabuf_ioctl) from [<805d380c>] (__do_sys_ioctl fs/ioctl.c:595 [inline])
[<80c7ff38>] (udmabuf_ioctl) from [<805d380c>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583)
 r6:40187542 r5:840be901 r4:00000000
[<805d35c8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdfc75fa8 to 0xdfc75ff0)
5fa0:                   00000000 00000000 00000003 40187542 20000040 00000000
5fc0: 00000000 00000000 00356310 00000036 003562d8 00000000 00000001 76f230dc
5fe0: 76f22e88 76f22e78 00019004 00130ac0
 r10:00000036 r9:841a3200 r8:8020029c r7:00000036 r6:00356310 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..