kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 31937 Comm: syz-executor0 Not tainted 4.20.0-rc7-next-20181224 #1 kobject: 'loop2' (00000000c3791658): kobject_uevent_env 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 kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' RSP: 0018:ffff888090797288 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff888097e16460 RCX: ffffc90005b57000 RDX: 0000000000000037 RSI: ffffffff81c8242a RDI: 00000000000001b8 RBP: ffff8880907972b0 R08: 1ffff110112e99ba R09: ffffed10112e99bb R10: ffffed10112e99ba R11: ffff88808974cdd5 R12: 0000000000000000 R13: ffff888097e16500 R14: ffffffff88575420 R15: 0000000000000e63 FS: 00007fb86affe700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073c000 CR3: 00000000926a8000 CR4: 00000000001406e0 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+0xad3/0x1130 fs/seq_file.c:268 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:1500 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x1f8/0x240 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:00007fb86affdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000088004 R11: 0000000000000246 R12: 00007fb86affe6d4 R13: 00000000004c4b6b R14: 00000000004d8278 R15: 00000000ffffffff Modules linked in: kobject: 'loop2' (00000000c3791658): kobject_uevent_env kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000da2cb511): kobject_uevent_env kobject: 'loop2' (00000000c3791658): kobject_uevent_env kobject: 'loop5' (00000000da2cb511): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000dee8df2e): kobject_uevent_env kobject: 'loop4' (00000000dee8df2e): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000c3791658): kobject_uevent_env kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (00000000dee8df2e): kobject_uevent_env ---[ end trace 7e12dd25fe43d603 ]--- kobject: 'loop4' (00000000dee8df2e): fill_kobj_path: path = '/devices/virtual/block/loop4' RIP: 0010:transparent_hugepage_enabled+0x8c/0x5e0 mm/huge_memory.c:69 kobject: 'loop2' (00000000c3791658): 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 kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop2' (00000000c3791658): kobject_uevent_env kobject: 'loop2' (00000000c3791658): fill_kobj_path: path = '/devices/virtual/block/loop2' RSP: 0018:ffff888090797288 EFLAGS: 00010202 kobject: 'loop5' (00000000da2cb511): kobject_uevent_env RAX: dffffc0000000000 RBX: ffff888097e16460 RCX: ffffc90005b57000 kobject: 'loop5' (00000000da2cb511): fill_kobj_path: path = '/devices/virtual/block/loop5' RDX: 0000000000000037 RSI: ffffffff81c8242a RDI: 00000000000001b8 kobject: 'loop4' (00000000dee8df2e): kobject_uevent_env RBP: ffff8880907972b0 R08: 1ffff110112e99ba R09: ffffed10112e99bb kobject: 'loop4' (00000000dee8df2e): fill_kobj_path: path = '/devices/virtual/block/loop4' R10: ffffed10112e99ba R11: ffff88808974cdd5 R12: 0000000000000000 R13: ffff888097e16500 R14: ffffffff88575420 R15: 0000000000000e63 FS: 00007fb86affe700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000070a158 CR3: 00000000926a8000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400