------------[ cut here ]------------ Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'fanotify_event' (offset 40, size 8)! WARNING: CPU: 0 PID: 8215 at mm/usercopy.c:78 usercopy_warn+0xeb/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8215 Comm: syz-executor399 Not tainted 5.0.0+ #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x45 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:usercopy_warn+0xeb/0x110 mm/usercopy.c:78 Code: c8 e8 d9 88 c0 ff 4c 8b 45 c0 4d 89 e9 4c 89 e1 48 8b 55 c8 41 57 48 89 de 48 c7 c7 e0 dc 74 87 ff 75 d0 41 56 e8 03 4b 93 ff <0f> 0b 48 83 c4 18 e9 46 ff ff ff 49 c7 c5 e0 da 74 87 4d 89 ee 4d RSP: 0018:ffff88809615fb18 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8774dca0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815ad7b6 RDI: ffffed1012c2bf55 RBP: ffff88809615fb70 R08: ffff888093f4a200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8859408d R13: ffffffff8775d500 R14: ffffffff8774db20 R15: 0000000000000008 __check_heap_object+0x88/0xb3 mm/slab.c:4453 check_heap_object mm/usercopy.c:238 [inline] __check_object_size mm/usercopy.c:284 [inline] __check_object_size+0x342/0x42f mm/usercopy.c:254 check_object_size include/linux/thread_info.h:119 [inline] check_copy_size include/linux/thread_info.h:150 [inline] copy_to_user include/linux/uaccess.h:151 [inline] copy_fid_to_user fs/notify/fanotify/fanotify_user.c:236 [inline] copy_event_to_user fs/notify/fanotify/fanotify_user.c:294 [inline] fanotify_read+0xde0/0x1430 fs/notify/fanotify/fanotify_user.c:362 __vfs_read+0x8d/0x110 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 ksys_read+0xea/0x1f0 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4456b9 Code: e8 6c b6 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa08c132db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 00000000004456b9 RDX: 000000000000006b RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c R13: 00007fffa84a8acf R14: 00007fa08c1339c0 R15: 20c49ba5e353f7cf Kernel Offset: disabled Rebooting in 86400 seconds..