bisecting cause commit starting from c85fb28b6f999db9928b841f63f1beeb3074eeca
building syzkaller on 1880b4a9f394370a7d1fcb5c1cfca0fa1127b463
testing commit c85fb28b6f999db9928b841f63f1beeb3074eeca with gcc (GCC) 8.1.0
kernel signature: fe64e24b52ea44e335863bf3a3e7356f23090ae6f50e05497ed84ce58f8a8cdc
all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in reiserfs_security_init
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.1.0
kernel signature: 828f688f132b49b21bb759ab901f45dfde1e66e7b8a1419aa3d46f0c632b043e
all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in reiserfs_security_init
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0
kernel signature: 92dc347eaf3feccc21e031bcb356c24c581ddbbf60b7c67a50d77bcca096ed8d
run #0: crashed: general protection fault in reiserfs_security_init
run #1: crashed: general protection fault in reiserfs_security_init
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: KASAN: use-after-free Read in search_by_entry_key
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0
kernel signature: 22c21dcd413df566ebe017d0c342f28e15fbb220103e711d52f10e275a7ff043
all runs: crashed: general protection fault in reiserfs_security_init
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0
kernel signature: 9d30a128556ae271a6898549d40f8de078f27c364607f682d316c11854d133e1
all runs: crashed: general protection fault in reiserfs_security_init
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0
kernel signature: fafe3cd9b80a396780393d9ee3d850f2652cfd3fd00748580fa144cb928896cc
all runs: crashed: general protection fault in reiserfs_security_init
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
kernel signature: b864dd837c31e1618e2adb9cb71625a605e937336b8d94fdacb0947feff4e704
all runs: crashed: general protection fault in reiserfs_security_init
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0
kernel signature: 1a26363c9c6f7e74349160dc09c9f7adf039a56abb47ec87a6955fe31beb0c6d
all runs: crashed: general protection fault in reiserfs_security_init
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0
kernel signature: bec7fc464fea4ec939e40c5488f1ddbc54cd960688e1167a7b16d61f82a1d787
run #0: crashed: general protection fault in reiserfs_security_init
run #1: crashed: general protection fault in reiserfs_security_init
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: KASAN: use-after-free Read in search_by_entry_key
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0
kernel signature: 673de8935125f83bdcf95f458b60c339303ee2d21e7bf8d5eac3bb5bb9cbd8d5
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0
kernel signature: 57ac399379df062a54b9df6bc7bc25072d66796df00c36cccacd3d985f805f32
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0
kernel signature: 5177d70d207e6032fbb875bdeaa06cf7bf6e639190bb49fb777fc07c4290ca5d
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0
kernel signature: f25fa22c556808c8197537b214abef29a65c5ad0362a69fea360d30daaa04c26
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
kernel signature: 76c4d8b6a6799abae540cedf1227fdd58999eadd1b5e69da768cf7fd12f96f01
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
kernel signature: c6cf181c327892346b75b6d1e1ec66587231cf46bde67f03b84bf1bc70dc5532
all runs: crashed: general protection fault in reiserfs_security_init
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
kernel signature: e4e99eadb5574842705221d1ea8d3bc08bb275d81fae50ae8409de165e2a2969
run #0: crashed: general protection fault in reiserfs_security_init
run #1: crashed: general protection fault in corrupted
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: KASAN: use-after-free Read in search_by_entry_key
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
kernel signature: 66cce4c056118c14e8e76bc047b3f097f0041d60eda8ef4b158924270a1fff10
run #0: crashed: general protection fault in reiserfs_security_init
run #1: crashed: general protection fault in reiserfs_security_init
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: KASAN: slab-out-of-bounds Read in search_by_entry_key
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
kernel signature: 19221872981283e05d00c74e62a222c96b3fbea838019abc08e93277e6c3178f
run #0: crashed: general protection fault in corrupted
run #1: crashed: general protection fault in reiserfs_security_init
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: KASAN: use-after-free Read in search_by_entry_key
run #5: crashed: KASAN: slab-out-of-bounds Read in search_by_entry_key
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: KASAN: use-after-free Read in search_by_entry_key
run #9: crashed: general protection fault in reiserfs_security_init
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
kernel signature: 5d25581329952be0d9102efa86130ace777cb690995e270a0ebfafd682667e1c
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: 5720c1d2d9f9cefea0ecd95e5ac3d6c2071b4d847f3ee9cb735f0e81504c15b0
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: 3e21ca28ac08eacb44ef9ef6e69de528f54f58870535c2018163fe18731129d4
run #0: crashed: general protection fault in reiserfs_security_init
run #1: crashed: KASAN: use-after-free Read in search_by_entry_key
run #2: crashed: KASAN: use-after-free Read in search_by_entry_key
run #3: crashed: KASAN: use-after-free Read in search_by_entry_key
run #4: crashed: KASAN: use-after-free Read in search_by_entry_key
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
kernel signature: fa5d3a4e80b6807eb1688ca794c2047a336f645400a33d49c7a561843956bc21
run #0: crashed: KASAN: use-after-free Read in search_by_entry_key
run #1: crashed: KASAN: use-after-free Read in search_by_entry_key
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: KASAN: use-after-free Read in search_by_entry_key
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: KASAN: use-after-free Read in search_by_entry_key
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
kernel signature: aebf06466717f9629b630ab04b7b084c8ec5f1720b953a0816cb87b7a7a5dce4
run #0: crashed: KASAN: use-after-free Read in search_by_entry_key
run #1: crashed: general protection fault in reiserfs_security_init
run #2: crashed: general protection fault in reiserfs_security_init
run #3: crashed: general protection fault in reiserfs_security_init
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: general protection fault in reiserfs_security_init
run #6: crashed: general protection fault in reiserfs_security_init
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: general protection fault in reiserfs_security_init
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
kernel signature: 8224ac3c22d308daeb4cff90d9bae7d00a870fb58e710a5abe02532ce9a5ceb4
run #0: crashed: general protection fault in batadv_iv_ogm_queue_add
run #1: crashed: KASAN: null-ptr-deref Read
run #2: crashed: KASAN: use-after-free Read in search_by_entry_key
run #3: crashed: KASAN: use-after-free Read in search_by_entry_key
run #4: crashed: general protection fault in reiserfs_security_init
run #5: crashed: KASAN: use-after-free Read in search_by_entry_key
run #6: crashed: KASAN: use-after-free Read in search_by_entry_key
run #7: crashed: general protection fault in reiserfs_security_init
run #8: crashed: general protection fault in reiserfs_security_init
run #9: crashed: KASAN: use-after-free Read in search_by_entry_key
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
kernel signature: ab67a4dfbd93fa192466f8ba5b7fbb73c6ebf09d5bc9130ad52e3611b93298fe
all runs: crashed: WARNING in sysfs_warn_dup
revisions tested: 25, total time: 3h54m28.43543803s (build: 2h22m26.86970781s, test: 1h27m41.094110015s)
the crash already happened on the oldest tested release
commit msg: Linux 4.6
crash: WARNING in sysfs_warn_dup
bond0: Enslaving bond_slave_0 as an active interface with an up link
IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready
bond0: Enslaving bond_slave_1 as an active interface with an up link
IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5906 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: 5906 Comm: syz-executor.2 Not tainted 4.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 ffff8801294aefc8 ffffffff82e18b12 ffffffff85e81040
 ffff8801294af0a0 ffffffff85f2bc00 ffffffff8191bd7b 0000000000000009
 ffff8801294af090 ffffffff8160d884 0000000041b58ab3 ffffffff86b4158a
Call Trace:
 [<ffffffff82e18b12>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82e18b12>] dump_stack+0x136/0x1d4 lib/dump_stack.c:51
 [<ffffffff8160d884>] panic+0x1af/0x348 kernel/panic.c:152
 [<ffffffff81335ecd>] __warn+0x18d/0x1b0 kernel/panic.c:504
 [<ffffffff81335f82>] warn_slowpath_fmt+0x92/0xb0 kernel/panic.c:527
 [<ffffffff8191bd7b>] sysfs_warn_dup+0x7b/0xa0 fs/sysfs/dir.c:30
 [<ffffffff8191c5f1>] sysfs_do_create_link_sd.isra.0+0xd1/0xf0 fs/sysfs/symlink.c:51
 [<ffffffff8191c653>] sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
 [<ffffffff8191c653>] sysfs_create_link+0x43/0xb0 fs/sysfs/symlink.c:92
 [<ffffffff836e3a07>] device_add_class_symlinks drivers/base/core.c:891 [inline]
 [<ffffffff836e3a07>] device_add+0x677/0x1350 drivers/base/core.c:1086
 [<ffffffff836e4a48>] device_create_groups_vargs+0x1c8/0x220 drivers/base/core.c:1709
 [<ffffffff836e4b48>] device_create_vargs drivers/base/core.c:1749 [inline]
 [<ffffffff836e4b48>] device_create+0x88/0xa0 drivers/base/core.c:1785
 [<ffffffff83a9e7c4>] macvtap_device_event+0x1c4/0x2a0 drivers/net/macvtap.c:1298
 [<ffffffff81399feb>] notifier_call_chain+0x8b/0x170 kernel/notifier.c:93
 [<ffffffff8139a0f1>] __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 [<ffffffff8139a0f1>] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401
 [<ffffffff84b0e047>] call_netdevice_notifiers_info+0x47/0x80 net/core/dev.c:1643
 [<ffffffff84b32a98>] call_netdevice_notifiers net/core/dev.c:1659 [inline]
 [<ffffffff84b32a98>] register_netdevice+0x8e8/0xd00 net/core/dev.c:7027
 [<ffffffff83a95f19>] macvlan_common_newlink+0x8b9/0x1090 drivers/net/macvlan.c:1316
 [<ffffffff83a9cb8f>] macvtap_newlink+0xbf/0x110 drivers/net/macvtap.c:471
 [<ffffffff84b6354b>] rtnl_newlink+0xd4b/0x1230 net/core/rtnetlink.c:2466
 [<ffffffff84b5dff2>] rtnetlink_rcv_msg+0x222/0x680 net/core/rtnetlink.c:3513
 [<ffffffff84ce1612>] netlink_rcv_skb+0x242/0x350 net/netlink/af_netlink.c:2277
 [<ffffffff84b5ddc5>] rtnetlink_rcv+0x25/0x30 net/core/rtnetlink.c:3519
 [<ffffffff84ce01aa>] netlink_unicast_kernel net/netlink/af_netlink.c:1214 [inline]
 [<ffffffff84ce01aa>] netlink_unicast+0x3da/0x560 net/netlink/af_netlink.c:1240
 [<ffffffff84ce0ddb>] netlink_sendmsg+0x9bb/0xb40 net/netlink/af_netlink.c:1786
 [<ffffffff84abd2d5>] sock_sendmsg_nosec net/socket.c:612 [inline]
 [<ffffffff84abd2d5>] sock_sendmsg+0xb5/0xf0 net/socket.c:622
 [<ffffffff84ac10ca>] SYSC_sendto net/socket.c:1648 [inline]
 [<ffffffff84ac10ca>] SyS_sendto+0x1ca/0x290 net/socket.c:1616
 [<ffffffff85d5e100>] entry_SYSCALL_64_fastpath+0x23/0xc1
Kernel Offset: disabled