kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5724 Comm: syz-executor3 Not tainted 4.20.0-rc7-next-20181224 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 Code: 80 3c 02 00 0f 85 b2 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 95 04 00 00 49 8b bc 24 b8 01 00 00 e8 bd 82 e6 RSP: 0018:ffff888094f47288 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88808dc0eb98 RCX: ffffc9000c229000 RDX: 0000000000000037 RSI: ffffffff81c8242a RDI: 00000000000001b8 RBP: ffff888094f472b0 R08: 1ffff110127309cc R09: ffffed10127309cd R10: ffffed10127309cc R11: ffff888093984e63 R12: 0000000000000000 R13: ffff88808dc0ec38 R14: dffffc0000000000 R15: 0000000000000f5c FS: 00007fb869a84700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdb3a89f0c CR3: 0000000094a8d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: show_smap+0x179/0x590 fs/proc/task_mmu.c:805 seq_read+0x4db/0x1130 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x50c/0xac0 fs/splice.c:417 do_splice_to+0x12a/0x190 fs/splice.c:880 splice_direct_to_actor+0x31b/0x9d0 fs/splice.c:957 do_splice_direct+0x2c7/0x420 fs/splice.c:1066 do_sendfile+0x61a/0xe60 fs/read_write.c:1439 __do_sys_sendfile64 fs/read_write.c:1494 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x15a/0x240 fs/read_write.c:1486 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb869a83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9 RDX: 0000000020000000 RSI: 0000000000000006 RDI: 0000000000000003 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 000000007ffffffd R11: 0000000000000246 R12: 00007fb869a846d4 R13: 00000000004c4b6b R14: 00000000004d8278 R15: 00000000ffffffff Modules linked in: protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop1' (00000000c9c742c2): kobject_uevent_env kobject: 'loop1' (00000000c9c742c2): fill_kobj_path: path = '/devices/virtual/block/loop1' ---[ end trace 413b40aaa223f1bf ]--- RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 kobject: 'loop1' (00000000c9c742c2): kobject_uevent_env Code: 80 3c 02 00 0f 85 b2 04 00 00 4c 8b a3 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 b8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 95 04 00 00 49 8b bc 24 b8 01 00 00 e8 bd 82 e6 RSP: 0018:ffff888094f47288 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88808dc0eb98 RCX: ffffc9000c229000 RDX: 0000000000000037 RSI: ffffffff81c8242a RDI: 00000000000001b8 RBP: ffff888094f472b0 R08: 1ffff110127309cc R09: ffffed10127309cd R10: ffffed10127309cc R11: ffff888093984e63 R12: 0000000000000000 R13: ffff88808dc0ec38 R14: dffffc0000000000 R15: 0000000000000f5c FS: 00007fb869a84700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000094a8d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400