bisecting cause commit starting from 59126901f200f5fc907153468b03c64e0081b6e6 building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit 59126901f200f5fc907153468b03c64e0081b6e6 with gcc (GCC) 8.1.0 kernel signature: 1570abcb0ecd4aeed408604f0fd4a23df20b1342af6b1f0d0aa6f54df1aeb78a run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in __rb_insert_augmented run #1: crashed: WARNING in rt_mutex_debug_task_free run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in do_swap_page run #3: crashed: BUG: unable to handle kernel paging request in free_pages_and_swap_cache run #4: crashed: general protection fault in call_rcu run #5: crashed: WARNING in css_set_move_task run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in enqueue_entity run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in do_swap_page run #8: crashed: BUG: unable to handle kernel paging request in rb_next run #9: crashed: WARNING: locking bug in finish_task_switch testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0 kernel signature: e211a02a3196c408518b6c934d1e662bdac7f6baca173c3da3771e7a1568b9b7 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in psi_task_change run #1: crashed: BUG: unable to handle kernel paging request in handle_mm_fault run #2: crashed: kernel panic: corrupted stack end in sys_futex run #3: crashed: general protection fault in __switch_to run #4: crashed: unexpected kernel reboot run #5: crashed: kernel BUG at mm/memory.c:LINE! run #6: crashed: BUG: corrupted list in tty_write_lock run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #8: crashed: BUG: unable to handle kernel paging request in unmap_page_range run #9: crashed: kernel panic: stack is corrupted in futex_wait testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0 kernel signature: a06a234121400a0f857ccc55de25d9bab43841ede11d3d80febd30cb8f3c219d run #0: crashed: general protection fault in do_swap_page run #1: crashed: BUG: unable to handle kernel paging request in corrupted run #2: crashed: general protection fault in do_swap_page run #3: crashed: BUG: unable to handle kernel paging request in corrupted run #4: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #5: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #6: crashed: general protection fault in anon_vma_interval_tree_insert run #7: crashed: general protection fault in __rb_erase_color run #8: crashed: BUG: Bad page map run #9: crashed: no output from test machine testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0 kernel signature: d3305ec2863d24610eedfc32fec54f653037b510ff6261b3df85d16fece8ba8a run #0: crashed: general protection fault in free_pages_and_swap_cache run #1: crashed: WARNING in corrupted run #2: crashed: BUG: unable to handle kernel paging request in __handle_mm_fault run #3: crashed: general protection fault in __switch_to run #4: crashed: BUG: unable to handle kernel paging request in get_page_from_freelist run #5: crashed: KASAN: unknown-crash Read in cpuacct_charge run #6: crashed: KASAN: unknown-crash Write in stack_trace_consume_entry run #7: crashed: BUG: corrupted list in copy_process run #8: crashed: general protection fault in batadv_tvlv_container_get run #9: crashed: no output from test machine testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0 kernel signature: 2b61c2fd0932c4bf870af440b41612370832da4a99a6347554e9bc91c7f9965f run #0: crashed: BUG: Bad page map run #1: crashed: general protection fault in timerqueue_add run #2: crashed: BUG: corrupted list in copy_process run #3: crashed: general protection fault in tomoyo_init_request_info run #4: crashed: kernel BUG at mm/memory.c:LINE! run #5: crashed: general protection fault in vma_interval_tree_insert_after run #6: crashed: BUG: corrupted list in copy_process run #7: crashed: BUG: Bad page map run #8: crashed: KASAN: unknown-crash Read in do_exit run #9: crashed: unexpected kernel reboot testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0 kernel signature: b4c6d2435546d201d3bd601130c114695ac2563322fee767a36af5b9c6a533a4 run #0: crashed: WARNING: locking bug in calculate_sigpending run #1: crashed: KASAN: slab-out-of-bounds Read in debug_check_no_obj_freed run #2: crashed: kernel BUG at mm/memory.c:LINE! run #3: crashed: general protection fault in __follow_pte_pmd run #4: crashed: general protection fault in anon_vma_interval_tree_insert run #5: crashed: BUG: spinlock bad magic in exit_sem run #6: crashed: unexpected kernel reboot run #7: crashed: BUG: corrupted list in account_entity_dequeue run #8: crashed: general protection fault in __schedule run #9: crashed: no output from test machine testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 kernel signature: 8de3f82665d26171415bd3041c5018d52bfd2671ef3dbc0cd78de572fb93c20a run #0: crashed: BUG: unable to handle kernel paging request in corrupted run #1: crashed: BUG: corrupted list in __mutex_add_waiter run #2: crashed: general protection fault in anon_vma_interval_tree_insert run #3: crashed: general protection fault in insert_vmap_area run #4: crashed: BUG: Bad page map run #5: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #6: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #7: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #9: crashed: KASAN: slab-out-of-bounds Read in corrupted testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 kernel signature: c378b8ce2ea3ec3e1f8dfe67bc4f10866857f1b0c35a45399cf36ecb4794a755 run #0: crashed: general protection fault in xas_start run #1: crashed: BUG: unable to handle kernel paging request in corrupted run #2: crashed: general protection fault in rb_insert_color run #3: crashed: general protection fault in anon_vma_interval_tree_insert run #4: crashed: unexpected kernel reboot run #5: crashed: BUG: unable to handle kernel paging request in fbcon_cursor run #6: crashed: general protection fault in __switch_to run #7: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #9: crashed: BUG: spinlock bad magic in calculate_sigpending testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 kernel signature: bbf3d6cde63b762ee9847978faf35b13e3ca378d913ed8f8f602414548cd6e59 run #0: crashed: unexpected kernel reboot run #1: crashed: WARNING: locking bug in __atomic_notifier_call_chain run #2: crashed: general protection fault in anon_vma_interval_tree_insert run #3: crashed: general protection fault in xas_start run #4: crashed: kernel BUG at mm/memory.c:LINE! run #5: crashed: unexpected kernel reboot run #6: crashed: BUG: unable to handle kernel paging request in __do_softirq run #7: crashed: general protection fault in vma_interval_tree_insert_after run #8: crashed: INFO: trying to register non-static key in calculate_sigpending run #9: crashed: INFO: trying to register non-static key in calculate_sigpending testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 kernel signature: a1c2bf0da6a8f88e5cc02d8d02efd2f911bad274e7f75c1d5b6eb5caeb03b561 run #0: crashed: BUG: corrupted list in __mutex_add_waiter run #1: crashed: general protection fault in anon_vma_interval_tree_insert run #2: crashed: general protection fault in validate_mm run #3: crashed: general protection fault in tty_write_lock run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #5: crashed: BUG: corrupted list in copy_process run #6: crashed: general protection fault in cfb_imageblit run #7: crashed: general protection fault in rb_insert_color_cached run #8: crashed: kernel panic: corrupted stack end in corrupted run #9: crashed: no output from test machine testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 kernel signature: aae8440693a6f2ff861d52adee9888a7600fe1f57b203bbeb758546c75b3e360 run #0: crashed: kernel panic: stack is corrupted in __schedule run #1: crashed: KASAN: use-after-free Read in fixup_exception run #2: crashed: general protection fault in anon_vma_interval_tree_insert run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #4: crashed: general protection fault in switch_mm_irqs_off run #5: crashed: kernel panic: stack is corrupted in __schedule run #6: crashed: general protection fault in xas_start run #7: crashed: unexpected kernel reboot run #8: crashed: general protection fault in rb_insert_color_cached run #9: crashed: no output from test machine testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0 kernel signature: ef9a80d3278c7ad96cc808f5d00c7d4040175d2ad1c49751b11326ccc30c131e run #0: crashed: general protection fault in enqueue_entity run #1: crashed: general protection fault in rb_erase_cached run #2: crashed: general protection fault in get_unmapped_area run #3: crashed: BUG: Bad page map run #4: crashed: BUG: corrupted list in copy_process run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #6: crashed: general protection fault in rb_next run #7: crashed: general protection fault in switch_mm_irqs_off run #8: crashed: general protection fault in cpuacct_charge run #9: crashed: general protection fault in anon_vma_interval_tree_insert testing release v4.18 testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0 kernel signature: 927aaff6328d0cd344f209c8e6b00d2a60114e841bcae173979f08013345f623 run #0: crashed: general protection fault in rb_erase run #1: crashed: general protection fault in anon_vma_interval_tree_insert run #2: crashed: INFO: trying to register non-static key in __anon_vma_prepare run #3: crashed: general protection fault in rb_next run #4: crashed: kernel panic: stack is corrupted in __schedule run #5: crashed: kernel panic: stack is corrupted in __schedule run #6: crashed: kernel panic: Fatal exception run #7: crashed: kernel panic: stack is corrupted in __schedule run #8: crashed: general protection fault in anon_vma_interval_tree_insert run #9: crashed: kernel BUG at mm/huge_memory.c:LINE! testing release v4.17 testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0 kernel signature: 307ee971f7b951feb1a53f8fd7cb88482b93a3e6cbfb988835147f1a68155fbe run #0: crashed: unexpected kernel reboot run #1: crashed: INFO: trying to register non-static key in try_to_wake_up run #2: crashed: kernel BUG at include/linux/mm.h:LINE! run #3: crashed: BUG: Bad page map run #4: crashed: kernel panic: stack is corrupted in __schedule run #5: crashed: general protection fault in anon_vma_interval_tree_insert run #6: crashed: unexpected kernel reboot run #7: crashed: unexpected kernel reboot run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in qlist_free_all testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0 kernel signature: ba596113d9c2f8772acf9b91d839d4cd797a664b16bfd04ce5daaeda49389048 run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: general protection fault in find_vma run #2: crashed: general protection fault in rb_erase run #3: crashed: stack segment fault in bit_cursor run #4: crashed: unexpected kernel reboot run #5: crashed: kernel panic: corrupted stack end in clone run #6: crashed: general protection fault in futex_wake run #7: crashed: general protection fault in tty_write_lock run #8: crashed: general protection fault in mm_update_next_owner run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.15 testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0 kernel signature: e691bfa43bae3775fb5afd5c78a5dcf21152a662cc253da886a09d3d7c931cc7 run #0: crashed: general protection fault in switch_mm_irqs_off run #1: crashed: general protection fault in __unqueue_futex run #2: crashed: general protection fault in anon_vma_interval_tree_insert run #3: crashed: general protection fault in __switch_to run #4: crashed: general protection fault in anon_vma_interval_tree_insert run #5: crashed: general protection fault in hrtimer_nanosleep run #6: crashed: general protection fault in futex_wake run #7: crashed: BUG: unable to handle kernel paging request in corrupted run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0 kernel signature: da800d6023d1c33eae80da98325cbda636f05a2aefa2273304703d6f1501be6c run #0: crashed: general protection fault in __schedule run #1: crashed: general protection fault in __switch_to run #2: crashed: general protection fault in vma_merge run #3: crashed: general protection fault in timerqueue_add run #4: crashed: BUG: corrupted list in tty_write_lock run #5: crashed: general protection fault in __radix_tree_lookup run #6: crashed: WARNING in vmacache_find run #7: crashed: WARNING in vmacache_find run #8: crashed: general protection fault in anon_vma_clone run #9: crashed: general protection fault in wait_consider_task testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0 kernel signature: 2715fcbc09745b487d165978e968b01d6f17c9c92332c60db9fb224be949a8da run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: general protection fault in quarantine_remove_cache run #2: crashed: general protection fault in cfb_imageblit run #3: crashed: BUG: corrupted list in tty_write_lock run #4: crashed: general protection fault in try_to_wake_up run #5: crashed: BUG: unable to handle kernel paging request in corrupted run #6: crashed: general protection fault in validate_mm run #7: crashed: BUG: unable to handle kernel run #8: crashed: general protection fault in wait_consider_task run #9: crashed: INFO: rcu detected stall in smp_call_function testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0 kernel signature: d692a679c9e2af61146cf56cae813a6a8db238aadbbb3e4e156df37612a6b29c all runs: crashed: BUG: sleeping function called from invalid context in tap_get_minor testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0 kernel signature: a2086d54af730710193f9fe4ae87f4532c27fca5f253a84c9a8ef1d3e8889327 all runs: crashed: BUG: sleeping function called from invalid context in tap_get_minor testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 kernel signature: c3e37db5b1c8e1b2845a5f8de719ee3a18d0123e83b5c93a35596f2d1c802ba2 run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: WARNING: ODEBUG bug in preempt_count_add run #2: crashed: INFO: trying to register non-static key in copy_fs_struct run #3: crashed: kernel panic: corrupted stack end in tty_write run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #5: crashed: BUG: unable to handle kernel paging request in quarantine_remove_cache run #6: crashed: general protection fault in __switch_to run #7: crashed: WARNING in corrupted run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #9: crashed: BUG: spinlock bad magic in corrupted testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 kernel signature: 31169af2048664d4a92479dcb8b360b8a69d349c8638ec69d9d8351dc972228e run #0: crashed: BUG: unable to handle kernel paging request in value run #1: crashed: WARNING in rcu_process_callbacks run #2: crashed: PANIC: double fault in __switch_to_asm run #3: crashed: general protection fault in find_lock_task_mm run #4: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #5: crashed: general protection fault in creds_are_invalid run #6: crashed: INFO: trying to register non-static key in anon_vma_prepare run #7: crashed: general protection fault in __send_signal run #8: crashed: BUG: spinlock bad magic in corrupted run #9: crashed: no output from test machine testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 kernel signature: 390f52d534868bf1576fcf2b615227c05344faa75b464c1aa0684683bc8652ea run #0: crashed: general protection fault in common_file_perm run #1: crashed: WARNING: ODEBUG bug in __do_softirq run #2: crashed: general protection fault in __fget run #3: crashed: inconsistent lock state in cgroup_show_options run #4: crashed: INFO: suspicious RCU usage in cgroup_free run #5: crashed: WARNING in corrupted run #6: crashed: general protection fault in common_file_perm run #7: crashed: general protection fault in vma_interval_tree_remove run #8: crashed: WARNING in tty_write_lock run #9: crashed: WARNING in account_entity_dequeue testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 kernel signature: a86e39087f6a7146b866464cb60e489c1176ddb6cf8ec0a3a3d0087e4122974c run #0: crashed: BUG: unable to handle kernel paging request in handle_mm_fault run #1: crashed: general protection fault in kernfs_sop_show_path run #2: crashed: general protection fault in common_file_perm run #3: crashed: WARNING: ODEBUG bug in __do_softirq run #4: crashed: BUG: Bad rss-counter state run #5: crashed: general protection fault in anon_vma_interval_tree_insert run #6: crashed: general protection fault in seq_list_start run #7: crashed: general protection fault in mm_update_next_owner run #8: crashed: general protection fault in mm_update_next_owner run #9: crashed: BUG: unable to handle kernel paging request in mm_update_next_owner testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 kernel signature: 513dd20aed938c12c412f7d680fdfa948bc2908caf37639b85da990098a9115c all runs: crashed: WARNING in sysfs_warn_dup revisions tested: 25, total time: 4h24m6.420982248s (build: 2h15m12.4385705s, test: 2h5m2.395209962s) the crash already happened on the oldest tested release commit msg: Linux 4.6 crash: WARNING in sysfs_warn_dup IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5893 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30 sysfs: cannot create duplicate filename '/class/macvtap/tap50' Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 5893 Comm: syz-executor.0 Not tainted 4.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 ffff8800b1e0efc8 ffffffff82c65e52 ffffffff85c81040 ffff8800b1e0f0a0 ffffffff85d2bb80 ffffffff8191bd7b 0000000000000009 ffff8800b1e0f090 ffffffff8160d884 0000000041b58ab3 ffffffff868f8c5a Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x136/0x1d4 lib/dump_stack.c:51 [] panic+0x1af/0x348 kernel/panic.c:152 [] __warn+0x18d/0x1b0 kernel/panic.c:504 [] warn_slowpath_fmt+0x92/0xb0 kernel/panic.c:527 [] sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30 [] sysfs_do_create_link_sd.isra.0+0xd1/0xf0 fs/sysfs/symlink.c:51 [] sysfs_do_create_link fs/sysfs/symlink.c:80 [inline] [] sysfs_create_link+0x43/0xb0 fs/sysfs/symlink.c:92 [] device_add_class_symlinks drivers/base/core.c:891 [inline] [] device_add+0x677/0x1350 drivers/base/core.c:1086 [] device_create_groups_vargs+0x1c8/0x220 drivers/base/core.c:1709 [] device_create_vargs drivers/base/core.c:1749 [inline] [] device_create+0x88/0xa0 drivers/base/core.c:1785 [] macvtap_device_event+0x1c4/0x2a0 drivers/net/macvtap.c:1298 [] notifier_call_chain+0x8b/0x170 kernel/notifier.c:93 [] __raw_notifier_call_chain kernel/notifier.c:394 [inline] [] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401 [] call_netdevice_notifiers_info+0x47/0x80 net/core/dev.c:1643 [] call_netdevice_notifiers net/core/dev.c:1659 [inline] [] register_netdevice+0x8e8/0xd00 net/core/dev.c:7027 [] macvlan_common_newlink+0x8b9/0x1090 drivers/net/macvlan.c:1316 [] macvtap_newlink+0xbf/0x110 drivers/net/macvtap.c:471 [] rtnl_newlink+0xd4b/0x1230 net/core/rtnetlink.c:2466 [] rtnetlink_rcv_msg+0x222/0x680 net/core/rtnetlink.c:3513 [] netlink_rcv_skb+0x242/0x350 net/netlink/af_netlink.c:2277 [] rtnetlink_rcv+0x25/0x30 net/core/rtnetlink.c:3519 [] netlink_unicast_kernel net/netlink/af_netlink.c:1214 [inline] [] netlink_unicast+0x3da/0x560 net/netlink/af_netlink.c:1240 [] netlink_sendmsg+0x9bb/0xb40 net/netlink/af_netlink.c:1786 [] sock_sendmsg_nosec net/socket.c:612 [inline] [] sock_sendmsg+0xb5/0xf0 net/socket.c:622 [] SYSC_sendto net/socket.c:1648 [inline] [] SyS_sendto+0x1ca/0x290 net/socket.c:1616 [] entry_SYSCALL_64_fastpath+0x23/0xc1 Kernel Offset: disabled