2019/12/29 16:38:34 executed programs: 1 BUG: memory leak unreferenced object 0xffff88812bdee300 (size 32): comm "syz-executor.0", pid 7218, jiffies 4294989004 (age 14.010s) hex dump (first 32 bytes): 00 64 6d 61 62 75 66 3a 00 00 00 00 00 00 00 00 .dmabuf:........ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000009d9dbc2b>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000009d9dbc2b>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000009d9dbc2b>] slab_alloc mm/slab.c:3320 [inline] [<000000009d9dbc2b>] __do_kmalloc mm/slab.c:3654 [inline] [<000000009d9dbc2b>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3671 [<0000000081a5176b>] memdup_user+0x26/0xc0 mm/util.c:172 [<00000000700f0ae7>] strndup_user+0x62/0x80 mm/util.c:231 [<00000000ade4b361>] dma_buf_set_name drivers/dma-buf/dma-buf.c:331 [inline] [<00000000ade4b361>] dma_buf_ioctl+0x60/0x1e0 drivers/dma-buf/dma-buf.c:391 [<00000000700f7892>] vfs_ioctl fs/ioctl.c:47 [inline] [<00000000700f7892>] file_ioctl fs/ioctl.c:545 [inline] [<00000000700f7892>] do_vfs_ioctl+0x551/0x890 fs/ioctl.c:732 [<00000000b6ad7727>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:749 [<00000000c5904752>] __do_sys_ioctl fs/ioctl.c:756 [inline] [<00000000c5904752>] __se_sys_ioctl fs/ioctl.c:754 [inline] [<00000000c5904752>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:754 [<000000001cea1f3f>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<0000000063b64acd>] entry_SYSCALL_64_after_hwframe+0x44/0xa9