bisecting cause commit starting from f4d51dffc6c01a9e94650d95ce0104964f8ae822 building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit f4d51dffc6c01a9e94650d95ce0104964f8ae822 with gcc (GCC) 8.1.0 kernel signature: 43437fb1ef784fc3b859aec53d17abffd4dbf9da6d7a4045cc635543c866a79e run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: general protection fault in anon_vma_interval_tree_insert run #2: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #3: crashed: unexpected kernel reboot run #4: crashed: PANIC: double fault in __switch_to_asm run #5: crashed: BUG: unable to handle kernel paging request in anon_vma_interval_tree_insert run #6: crashed: kernel panic: Fatal exception run #7: crashed: general protection fault in update_load_avg run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in set_next_entity run #9: crashed: no output from test machine testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0 kernel signature: dc586077f1d8fbbde104a40b9bb4d33009343770f5e74426c39693071629375a run #0: crashed: general protection fault in rb_erase run #1: crashed: general protection fault in find_vma run #2: crashed: WARNING: refcount bug in __put_task_struct run #3: crashed: BUG: unable to handle kernel paging request in corrupted run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #5: crashed: INFO: trying to register non-static key in try_to_wake_up run #6: crashed: BUG: sleeping function called from invalid context in exc_page_fault run #7: crashed: kernel panic: corrupted stack end in sys_futex run #8: crashed: general protection fault in psi_task_change run #9: crashed: no output from test machine testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0 kernel signature: 0592d38fcfc8c743de10149bc393c4cbffb3271131f9b56fa7bd2538813ab4d9 run #0: crashed: general protection fault in futex_wake run #1: crashed: KASAN: unknown-crash Read in futex_wake run #2: crashed: BUG: Bad page map run #3: crashed: BUG: Bad page map run #4: crashed: BUG: unable to handle kernel paging request in corrupted 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 panic: Fatal exception run #8: crashed: unexpected kernel reboot run #9: crashed: general protection fault in set_next_entity testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0 kernel signature: 7d9ec3f6ec0f95fd6542c56372af01eba9a657d271035c90bb28a1626bad4ae0 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #1: crashed: BUG: Bad page map run #2: crashed: general protection fault in do_swap_page run #3: crashed: BUG: corrupted list in copy_process run #4: crashed: BUG: Bad page map run #5: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #6: crashed: kernel panic: Fatal exception run #7: crashed: BUG: Bad page map run #8: crashed: unexpected kernel reboot run #9: crashed: BUG: Bad page map testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0 kernel signature: 962eac06d13c5e098ac4e1bae5156a2862b2c48eb733ec3b1c0f96a73ac5671f run #0: crashed: KASAN: unknown-crash Read in tty_write_lock run #1: crashed: unexpected kernel reboot run #2: crashed: general protection fault in update_cfs_rq_h_load run #3: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #4: crashed: general protection fault in init_timer_key run #5: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #6: crashed: WARNING in plist_check_prev_next 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: no output from test machine testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0 kernel signature: 6922a851a880e893f632408d9fbb01a70d6be7c423e95c64fd1fa029bb0e0701 run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #1: crashed: general protection fault in mm_update_next_owner run #2: crashed: WARNING in __put_task_struct run #3: crashed: general protection fault in __schedule run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #5: crashed: BUG: spinlock bad magic in calculate_sigpending run #6: crashed: unexpected kernel reboot run #7: crashed: unexpected kernel reboot run #8: crashed: INFO: trying to register non-static key in try_to_wake_up run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 kernel signature: f434d0892480e558a1625f7b14b74a0a4e91912607968fd1e63d25ca2967649c run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: KASAN: null-ptr-deref Write in validate_mm run #2: crashed: kernel BUG at mm/mmap.c:LINE! run #3: crashed: WARNING in corrupted run #4: crashed: general protection fault in __task_pid_nr_ns run #5: crashed: general protection fault in cfb_imageblit run #6: crashed: general protection fault in psi_task_change run #7: crashed: general protection fault in tty_write_lock run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #9: crashed: general protection fault in wait_consider_task testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 kernel signature: cead780a3cdab8864a8b20637fbb032368f7004c852cce06d6b2a5878c01260a run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #1: crashed: BUG: unable to handle kernel paging request in corrupted run #2: crashed: BUG: unable to handle kernel paging request in corrupted run #3: crashed: general protection fault in schedule run #4: crashed: general protection fault in activate_task run #5: crashed: BUG: Bad page map run #6: crashed: BUG: Bad page map 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: bad usercopy in corrupted testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 kernel signature: a2c6cb1d0bc58eeda751aa19b98c525d758b31a34219350d2706f900d9632f37 run #0: crashed: general protection fault in futex_wake run #1: crashed: general protection fault in schedule run #2: crashed: general protection fault in futex_wait_queue_me run #3: crashed: BUG: corrupted list in copy_process run #4: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #5: crashed: general protection fault in __switch_to run #6: crashed: general protection fault in anon_vma_interval_tree_insert run #7: crashed: WARNING: CPU: 0 PID: 6782 at mm/vSeaBIOS (version 1.8.2-ADDR_ADDR-google) run #8: crashed: unexpected kernel reboot run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 kernel signature: dd9f82690c0e7d8e97ad33af8680a00fac4ee9221cb79568b1bef4b97e74ab25 run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: WARNING: locking bug in copy_process run #2: crashed: general protection fault in xas_start run #3: crashed: WARNING in debug_mutex_wake_waiter run #4: crashed: kernel panic: stack is corrupted in __schedule run #5: crashed: BUG: corrupted list in tty_write_lock run #6: crashed: kernel panic: stack is corrupted in __schedule run #7: crashed: general protection fault in __switch_to run #8: crashed: WARNING: locking bug in calculate_sigpending run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 kernel signature: 2adfd2c3dfd56ccc9d14f015d1edec40c7af5c0e6e3d577745214645cc1321ba run #0: crashed: BUG: corrupted list in tty_write_lock run #1: crashed: BUG: corrupted list in copy_process run #2: crashed: general protection fault in can_migrate_task run #3: crashed: kernel panic: stack is corrupted in __se_sys_futex run #4: crashed: WARNING in trace_hardirqs_on run #5: crashed: general protection fault in rb_insert_color run #6: crashed: unexpected kernel reboot run #7: crashed: BUG: corrupted list in tty_write_lock run #8: crashed: general protection fault in xas_start run #9: crashed: general protection fault in pick_next_task_fair testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0 kernel signature: aa30775f0508fd348a54362cfbe7a5e0114d52a98e2e83872e357f811ae1077c run #0: crashed: general protection fault in rb_insert_color run #1: crashed: WARNING in debug_mutex_wake_waiter run #2: crashed: general protection fault in futex_wait run #3: crashed: BUG: corrupted list in copy_process run #4: crashed: general protection fault in __se_sys_futex run #5: crashed: general protection fault in __radix_tree_lookup run #6: crashed: general protection fault in try_to_wake_up run #7: crashed: BUG: corrupted list in pick_next_task_fair run #8: crashed: kernel panic: stack is corrupted in __schedule 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: 79d13d25f0bffb5191158a6e5c896d19623c90f17d41d54f2238feb3079d3d64 run #0: crashed: general protection fault in free_pages_and_swap_cache run #1: crashed: KASAN: user-memory-access Write in copy_process run #2: crashed: general protection fault in unlink_anon_vmas run #3: crashed: kernel BUG at fs/namei.c:LINE! run #4: crashed: KASAN: use-after-free Read in dump_pagetable run #5: crashed: KASAN: use-after-free Read in path_init run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #7: crashed: BUG: Bad page map run #8: crashed: BUG: unable to handle kernel paging request in alloc_vmap_area run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.17 testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0 kernel signature: e4ab98f6fff502f7b817506cfffdc560160dbffe0c55483a70c3f681e8f749dd run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: general protection fault in init_timer_key run #2: crashed: general protection fault in __switch_to run #3: crashed: general protection fault in __switch_to run #4: crashed: kernel panic: stack is corrupted in __schedule run #5: crashed: general protection fault in rb_erase run #6: crashed: general protection fault in __switch_to run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in try_to_wake_up run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0 kernel signature: 1bd5518d0e745751ecdba442b8f3d65566411a100bca36963c8c6c40c937573a run #0: crashed: INFO: trying to register non-static key in call_usermodehelper_exec_async run #1: crashed: kernel panic: corrupted stack end in tty_write run #2: crashed: general protection fault in __switch_to run #3: crashed: WARNING in debug_mutex_wake_waiter run #4: crashed: BUG: corrupted list in tty_write_lock run #5: crashed: BUG: unable to handle kernel paging request in try_to_wake_up run #6: crashed: BUG: corrupted list in copy_process run #7: crashed: BUG: Bad page map run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! 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: 1670aaea3829b1e4415fbc70117475753ab007fd850c5e5ff64d661803ee7ca2 run #0: crashed: WARNING: bad unlock balance in n_tty_write run #1: crashed: BUG: corrupted list in tty_write_lock run #2: crashed: BUG: unable to handle kernel paging request in find_vma run #3: crashed: BUG: Bad page map run #4: crashed: general protection fault in schedule_timeout run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #6: crashed: BUG: corrupted list in pick_next_task_fair run #7: crashed: general protection fault in __close_fd run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in qlist_free_all run #9: crashed: no output from test machine testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0 kernel signature: 8afb1fb596e988ef285bc67114b827022f1cf49938ec515308c559facf4d397a run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted run #1: crashed: general protection fault in anon_vma_interval_tree_insert run #2: crashed: general protection fault in rb_next run #3: crashed: general protection fault in __radix_tree_lookup run #4: crashed: general protection fault in rb_erase run #5: crashed: BUG: corrupted list in tty_write_lock run #6: crashed: general protection fault in __schedule run #7: crashed: general protection fault in migrate_task_rq_fair run #8: crashed: general protection fault in find_lock_task_mm run #9: crashed: BUG: Bad page map testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0 kernel signature: 9860ecba48e37e098ef027f9019f3402f4140845f81478c06db3cc0607459c89 run #0: crashed: INFO: trying to register non-static key in try_to_wake_up run #1: crashed: kernel panic: Fatal exception run #2: crashed: general protection fault in schedule run #3: crashed: BUG: unable to handle kernel paging request in quarantine_remove_cache run #4: crashed: unexpected kernel reboot run #5: crashed: BUG: corrupted list in tty_write_lock run #6: crashed: general protection fault in rb_insert_color run #7: crashed: BUG: corrupted list in copy_process run #8: crashed: general protection fault in quarantine_remove_cache run #9: crashed: general protection fault in __schedule testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0 kernel signature: 5b13b17bf754d5032d8dfef288f82b2295438585637d68216d42bf4f2b66e791 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: c6d623752e964cac3cc730c0537d3045eb8e3248008f1736c8402c22aab61a15 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: 7b2d1fbd412a9500b05b453fb33396a6be50e1f0faa2ffcb0bbde8512aa2b3aa run #0: crashed: general protection fault in anon_vma_interval_tree_insert run #1: crashed: general protection fault in __switch_to run #2: crashed: general protection fault in anon_vma_interval_tree_insert run #3: crashed: BUG: unable to handle kernel paging request in corrupted run #4: crashed: general protection fault in __fd_install run #5: crashed: general protection fault in blk_mq_freeze_queue_wait run #6: crashed: general protection fault in __switch_to run #7: crashed: general protection fault in copy_mnt_ns run #8: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 kernel signature: 261f9207e087c2b7e516e2660ebb016ea438ee4b3e460bd6cb8013ea6050e132 run #0: crashed: general protection fault in try_to_wake_up run #1: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #2: crashed: general protection fault in list_lru_del run #3: crashed: WARNING in try_to_wake_up run #4: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! run #5: crashed: WARNING in corrupted run #6: crashed: INFO: trying to register non-static key in __close_fd run #7: crashed: general protection fault in futex_wake run #8: crashed: INFO: trying to register non-static key in do_send_sig_info run #9: crashed: BUG: Bad page map testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 kernel signature: 316886e2c0cecfca9a52381fe88c84a8edf662204c52b99b5b86f3280ba2eee9 run #0: crashed: general protection fault in rcu_process_callbacks run #1: crashed: WARNING in vmacache_find run #2: crashed: unexpected kernel reboot run #3: crashed: WARNING in new_inode run #4: crashed: unexpected kernel reboot run #5: crashed: general protection fault in hrtimer_active run #6: crashed: general protection fault in __enqueue_entity run #7: crashed: WARNING in account_entity_dequeue run #8: crashed: WARNING in corrupted run #9: crashed: kernel BUG at arch/x86/mm/physaddr.c:LINE! testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 kernel signature: f628b9f89f2458a21fc4cd2d46d48de6bf1040cfd27237ad00853018b7adc118 all runs: crashed: possible deadlock in copy_cgroup_ns testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 kernel signature: 38e13f8e5808d11e35da27b202f520a262dbfdf695d790f184c57ea6dd7166fe all runs: crashed: WARNING in sysfs_warn_dup revisions tested: 25, total time: 4h31m0.28056317s (build: 2h18m23.599638453s, test: 2h8m16.080420907s) 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_1: link is not ready bond0: Enslaving bond_slave_0 as an active interface with an up link IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5896 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: 1 PID: 5896 Comm: syz-executor.1 Not tainted 4.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 ffff8801288defc8 ffffffff82c65e52 ffffffff85c81040 ffff8801288df0a0 ffffffff85d2bb80 ffffffff8191bd7b 0000000000000009 ffff8801288df090 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