bisecting cause commit starting from d3590ebf6f91350192737dd1d1b219c05277f067
building syzkaller on 233283a191b3c32a48c56928985c8e2cfc004aeb
testing commit d3590ebf6f91350192737dd1d1b219c05277f067 with gcc (GCC) 8.1.0
kernel signature: 617c8a667a7848650f602fa62c0975a1e599cd41d255f0cc8c62035cb13025d1
run #0: crashed: general protection fault in match_subs_info
run #1: crashed: BUG: unable to handle kernel paging request in match_subs_info
run #2: crashed: general protection fault in match_subs_info
run #3: crashed: BUG: unable to handle kernel paging request in match_subs_info
run #4: crashed: BUG: unable to handle kernel paging request in match_subs_info
run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in rcu_core
run #6: crashed: BUG: unable to handle kernel paging request in match_subs_info
run #7: crashed: general protection fault in match_subs_info
run #8: crashed: general protection fault in match_subs_info
run #9: crashed: general protection fault in match_subs_info
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.1.0
kernel signature: ff1fb346a42ede987c925652d42a4faee92d3e1b3592ed69ce43be48e3b5b6af
run #0: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.1.0
kernel signature: ac75e861dd251aa092bd116493bf02b8cf30e20b5d3c5dbf6cdb7fae3808e309
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.1.0
kernel signature: 7d6540b080b253425ffbbd5277043189ab63be1715ea1ec2c5d3a51f7470e76a
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.1.0
kernel signature: f38f2e16b91017ff8fad5746d201f28f0a5042c90ea39bf32bcc05456da1f710
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
kernel signature: f0d935ee3d87e7889a25f4bf38584e488336ce57558ba46abf4832416e3f2482
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0
kernel signature: ab8b9e1420ae26025e4346d909f1bfdfae1b4608691095e6a9fb9fd2573de8f3
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0
kernel signature: 8faf19938b81e3ca5852f41b69563a2bc936c1831e069e7a0b0e8b0f51955f66
run #0: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0
kernel signature: ddddaa91245724bae5527b21880e41387271c6c796de476365800aba277f645a
run #0: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0
kernel signature: ad1aedf267a5f77782f137e2e73ffdecf254d472a342713770aaf3b67e1ae065
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0
kernel signature: 9756891889b217d0f5d7b3473fde1677b78b0197cac53df01e325ff4aa3c98a9
run #0: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.18
testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0
kernel signature: d821c12ca25e775630bdd3b1f947164a1e812d5736b89999e2ee04aeb3b7ada3
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v4.17
testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0
kernel signature: 0e91ee388f4c8513525010969cc94239a72d47b3e1ff3196be2802402081acd7
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.16
testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0
kernel signature: cce49c3d0de6452a8b710a9a4844ad66f32ba6adfcce8e82cd8da463f50257c2
run #0: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v4.15
testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0
kernel signature: 05f9ebbca0e50fb52c857f3a98b3352f26820b4814611a037bd7ddc061d639bb
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #5: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v4.14
testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0
kernel signature: d298ff8eb71457f68ff8ecd18f9e5f05a81f98771333bd77984d39d1e6ddf408
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #4: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #7: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #8: crashed: KASAN: invalid-free in snd_seq_port_disconnect
run #9: crashed: KASAN: invalid-free in snd_seq_port_disconnect
testing release v4.13
testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0
kernel signature: 6049e94ac5a98e84d1528556a1f5a749e451ae15fb11f4a932ea1673bef8fd2b
all runs: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.12
testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0
kernel signature: 13d6009c910db6cd9463231e72c2cfc83cf44c79c050b96631daf462b4144ecb
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: 0ba1fe21efae627102c919cba0ee344c653bb692418a3a8d9c53e8411265807e
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: 703d66702b47984971a9e038ec7f28210af061b65fb4957891ddbbe78c6972d1
run #0: crashed: BUG: Double free or freeing an invalid pointer
run #1: crashed: BUG: Double free or freeing an invalid pointer
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: BUG: Double free or freeing an invalid pointer
run #4: crashed: BUG: Double free or freeing an invalid pointer
run #5: crashed: BUG: Double free or freeing an invalid pointer
run #6: crashed: BUG: Double free or freeing an invalid pointer
run #7: crashed: BUG: Double free or freeing an invalid pointer
run #8: crashed: BUG: Double free or freeing an invalid pointer
run #9: crashed: BUG: Double free or freeing an invalid pointer
testing release v4.9
testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0
kernel signature: d08ea515f424ff59807713e38eadedd978b6b0d65682f759e6b8829be0d2428b
run #0: crashed: BUG: Double free or freeing an invalid pointer
run #1: crashed: BUG: Double free or freeing an invalid pointer
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: BUG: Double free or freeing an invalid pointer
run #4: crashed: BUG: Double free or freeing an invalid pointer
run #5: crashed: BUG: Double free or freeing an invalid pointer
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: BUG: Double free or freeing an invalid pointer
run #8: crashed: BUG: Double free or freeing an invalid pointer
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.8
testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0
kernel signature: f46c8bc1d26ecb6fd483f8ff5dea20f0a281134ef3c041e24e2a3ac4d7a8c8e0
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: BUG: Double free or freeing an invalid pointer
run #2: crashed: BUG: Double free or freeing an invalid pointer
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: BUG: Double free or freeing an invalid pointer
run #5: crashed: BUG: Double free or freeing an invalid pointer
run #6: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #7: crashed: BUG: Double free or freeing an invalid pointer
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
testing release v4.7
testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0
kernel signature: c52fc351503a4be71347da1f5959e05efa92a40183d60a78737e18ee12a8d723
run #0: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #1: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #2: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #3: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #4: crashed: KASAN: use-after-free Write in getname_flags
run #5: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #6: crashed: BUG: spinlock lockup suspected in quarantine_put
run #7: OK
run #8: crashed: KASAN: use-after-free Read in delete_and_unsubscribe_port
run #9: OK
testing release v4.6
testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0
kernel signature: f0bac7620b16dcba957864428169592144ab4d6694e00927f52395096b7ab45a
all runs: crashed: WARNING in sysfs_warn_dup
revisions tested: 24, total time: 3h57m26.311922724s (build: 2h17m56.537701985s, test: 1h35m1.547095503s)
the crash already happened on the oldest tested release
commit msg: Linux 4.6
crash: WARNING in sysfs_warn_dup
bond0: Enslaving bond_slave_1 as an active interface with an up link
IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5895 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: 5895 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 ffff8800ba3e6fc8 ffffffff82c65e52 ffffffff85c81040
 ffff8800ba3e70a0 ffffffff85d2bb80 ffffffff8191bd7b 0000000000000009
 ffff8800ba3e7090 ffffffff8160d884 0000000041b58ab3 ffffffff868f3a9a
Call Trace:
 [<ffffffff82c65e52>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff82c65e52>] 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
 [<ffffffff83531337>] device_add_class_symlinks drivers/base/core.c:891 [inline]
 [<ffffffff83531337>] device_add+0x677/0x1350 drivers/base/core.c:1086
 [<ffffffff83532378>] device_create_groups_vargs+0x1c8/0x220 drivers/base/core.c:1709
 [<ffffffff83532478>] device_create_vargs drivers/base/core.c:1749 [inline]
 [<ffffffff83532478>] device_create+0x88/0xa0 drivers/base/core.c:1785
 [<ffffffff838d1764>] 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
 [<ffffffff84928557>] call_netdevice_notifiers_info+0x47/0x80 net/core/dev.c:1643
 [<ffffffff8494cfa8>] call_netdevice_notifiers net/core/dev.c:1659 [inline]
 [<ffffffff8494cfa8>] register_netdevice+0x8e8/0xd00 net/core/dev.c:7027
 [<ffffffff838c8eb9>] macvlan_common_newlink+0x8b9/0x1090 drivers/net/macvlan.c:1316
 [<ffffffff838cfb2f>] macvtap_newlink+0xbf/0x110 drivers/net/macvtap.c:471
 [<ffffffff8497da5b>] rtnl_newlink+0xd4b/0x1230 net/core/rtnetlink.c:2466
 [<ffffffff84978502>] rtnetlink_rcv_msg+0x222/0x680 net/core/rtnetlink.c:3513
 [<ffffffff84afbb22>] netlink_rcv_skb+0x242/0x350 net/netlink/af_netlink.c:2277
 [<ffffffff849782d5>] rtnetlink_rcv+0x25/0x30 net/core/rtnetlink.c:3519
 [<ffffffff84afa6ba>] netlink_unicast_kernel net/netlink/af_netlink.c:1214 [inline]
 [<ffffffff84afa6ba>] netlink_unicast+0x3da/0x560 net/netlink/af_netlink.c:1240
 [<ffffffff84afb2eb>] netlink_sendmsg+0x9bb/0xb40 net/netlink/af_netlink.c:1786
 [<ffffffff848d77e5>] sock_sendmsg_nosec net/socket.c:612 [inline]
 [<ffffffff848d77e5>] sock_sendmsg+0xb5/0xf0 net/socket.c:622
 [<ffffffff848db5da>] SYSC_sendto net/socket.c:1648 [inline]
 [<ffffffff848db5da>] SyS_sendto+0x1ca/0x290 net/socket.c:1616
 [<ffffffff85b78600>] entry_SYSCALL_64_fastpath+0x23/0xc1
Kernel Offset: disabled