WARNING: kmalloc bug in memdup

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: kmalloc bug in memdup_user (3) bpf	-1	syz, C			137	2999d	3000d	8/29	fixed on 2018/07/09 18:05
upstream	WARNING: kmalloc bug in memdup_user rdma	-1	syz, C			441	3054d	3070d	4/29	fixed on 2018/03/23 18:14

WARNING: CPU: 0 PID: 7681 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7681 Comm: syz-executor1 Not tainted 4.16.0-rc7+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012 RSP: 0018:ffff8801a223f970 EFLAGS: 00010246 RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffffff8197516b RDX: ffffffff8423768f RSI: 0000000000000000 RDI: 0000000001000000 RBP: ffff8801a223f970 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff88614400 R11: 0000000000000000 R12: 0000000001000000 R13: 000000000000000a R14: 00000000014200c0 R15: ffff8801b95c9a00 __do_kmalloc mm/slab.c:3700 [inline] __kmalloc_track_caller+0x21/0x760 mm/slab.c:3720 memdup_user+0x2c/0x90 mm/util.c:160 ucma_set_option+0x14f/0x520 drivers/infiniband/core/ucma.c:1313 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1649 __vfs_write+0xef/0x970 fs/read_write.c:480 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x454879 RSP: 002b:00007fb9e7b63c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fb9e7b646d4 RCX: 0000000000454879 RDX: 00000000000000b2 RSI: 0000000020000400 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000683 R14: 00000000006face8 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..