bisecting cause commit starting from 4b3c31c8d4dda4d70f3f24a165f3be99499e0328 building syzkaller on c3f3344c78d6f69e1494297262c453f8ed10a844 testing commit 4b3c31c8d4dda4d70f3f24a165f3be99499e0328 with gcc (GCC) 8.1.0 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0 all runs: OK # git bisect start v4.20 v4.19 Bisecting: 7499 revisions left to test after this (roughly 13 steps) [ec9c166434595382be3babf266febf876327774d] Merge tag 'mips_fixes_4.20_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux testing commit ec9c166434595382be3babf266febf876327774d with gcc (GCC) 8.1.0 all runs: OK # git bisect good ec9c166434595382be3babf266febf876327774d Bisecting: 3610 revisions left to test after this (roughly 12 steps) [93335e5911dbffccd3b74c4d214268c0fd2bc1b0] Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc testing commit 93335e5911dbffccd3b74c4d214268c0fd2bc1b0 with gcc (GCC) 8.1.0 run #0: crashed: WARNING in batadv_mcast_mla_tt_retract run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 93335e5911dbffccd3b74c4d214268c0fd2bc1b0 Bisecting: 1940 revisions left to test after this (roughly 11 steps) [ac435075892e3e651c667b4a9f2267cf3ef1d5a2] Merge tag 'csky-for-linus-4.20' of https://github.com/c-sky/csky-linux testing commit ac435075892e3e651c667b4a9f2267cf3ef1d5a2 with gcc (GCC) 8.1.0 all runs: OK # git bisect good ac435075892e3e651c667b4a9f2267cf3ef1d5a2 Bisecting: 826 revisions left to test after this (roughly 10 steps) [134bf98c5596605af90f104716ef912e8f7eb56b] Merge tag 'media/v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media testing commit 134bf98c5596605af90f104716ef912e8f7eb56b with gcc (GCC) 8.1.0 all runs: OK # git bisect good 134bf98c5596605af90f104716ef912e8f7eb56b Bisecting: 411 revisions left to test after this (roughly 9 steps) [0526b92e3a7922ca403d21174259ba90e9710c6c] Merge tag 'renesas-arm64-dt2-for-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/dt testing commit 0526b92e3a7922ca403d21174259ba90e9710c6c with gcc (GCC) 8.1.0 all runs: OK # git bisect good 0526b92e3a7922ca403d21174259ba90e9710c6c Bisecting: 208 revisions left to test after this (roughly 8 steps) [3a7c41e59939b1cfb08dcd4cfef51e5633ae0e19] Merge tag 'mvebu-dt-4.20-1' of git://git.infradead.org/linux-mvebu into next/dt testing commit 3a7c41e59939b1cfb08dcd4cfef51e5633ae0e19 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 3a7c41e59939b1cfb08dcd4cfef51e5633ae0e19 Bisecting: 103 revisions left to test after this (roughly 7 steps) [22b9292141aa791d8182514da9ba780e7ea09528] Merge tag 'v4.20-rockchip-dts64-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/dt testing commit 22b9292141aa791d8182514da9ba780e7ea09528 with gcc (GCC) 8.1.0 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 22b9292141aa791d8182514da9ba780e7ea09528 Bisecting: 52 revisions left to test after this (roughly 6 steps) [cfd91db31fbf4ae7f2cfca2617ce99956b1c94d6] ARM: dts: am437x-gp-evm: get rid of phy_id property testing commit cfd91db31fbf4ae7f2cfca2617ce99956b1c94d6 with gcc (GCC) 8.1.0 all runs: OK # git bisect good cfd91db31fbf4ae7f2cfca2617ce99956b1c94d6 Bisecting: 27 revisions left to test after this (roughly 5 steps) [5f681f41fe1714e9961dcba2e98adea2a0daf9c5] ARM: dts: am335x: Replace remaining legacy phy_id with phy-handle testing commit 5f681f41fe1714e9961dcba2e98adea2a0daf9c5 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 5f681f41fe1714e9961dcba2e98adea2a0daf9c5 Bisecting: 13 revisions left to test after this (roughly 4 steps) [6c69dfe2af72960815292914fae4432e414b9e77] arm64: dts: rockchip: add Innosilicon hdmi phy node to rk3328 testing commit 6c69dfe2af72960815292914fae4432e414b9e77 with gcc (GCC) 8.1.0 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 6c69dfe2af72960815292914fae4432e414b9e77 Bisecting: 6 revisions left to test after this (roughly 3 steps) [86ea9dc8c57f8dfa2380399fddf6b1ca87907305] arm64: dts: rockchip: Enable SD card detection for Rock960 boards testing commit 86ea9dc8c57f8dfa2380399fddf6b1ca87907305 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 86ea9dc8c57f8dfa2380399fddf6b1ca87907305 Bisecting: 3 revisions left to test after this (roughly 2 steps) [2ed30cfcf866f657349bf9f54a017a957cd98378] arm64: dts: rockchip: enable dwc2-based otg controller on px30-evb testing commit 2ed30cfcf866f657349bf9f54a017a957cd98378 with gcc (GCC) 8.1.0 run #0: crashed: WARNING: ODEBUG bug in netdev_freemem run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 2ed30cfcf866f657349bf9f54a017a957cd98378 Bisecting: 0 revisions left to test after this (roughly 1 step) [bb5981333f302f81fe520ca2b5f30f73f6bdaff1] arm64: dts: rockchip: add dwc2 otg controller on px30 testing commit bb5981333f302f81fe520ca2b5f30f73f6bdaff1 with gcc (GCC) 8.1.0 all runs: OK # git bisect good bb5981333f302f81fe520ca2b5f30f73f6bdaff1 2ed30cfcf866f657349bf9f54a017a957cd98378 is the first bad commit commit 2ed30cfcf866f657349bf9f54a017a957cd98378 Author: Heiko Stuebner Date: Thu Aug 2 13:36:41 2018 +0200 arm64: dts: rockchip: enable dwc2-based otg controller on px30-evb Enable the newly added controller on the px30 evaluation board. Signed-off-by: Heiko Stuebner arch/arm64/boot/dts/rockchip/px30-evb.dts | 4 ++++ 1 file changed, 4 insertions(+) revisions tested: 16, total time: 4h2m37.193322842s (build: 1h22m16.876899368s, test: 2h36m9.90644699s) first bad commit: 2ed30cfcf866f657349bf9f54a017a957cd98378 arm64: dts: rockchip: enable dwc2-based otg controller on px30-evb cc: ["devicetree@vger.kernel.org" "heiko@sntech.de" "linux-arm-kernel@lists.infradead.org" "linux-kernel@vger.kernel.org" "linux-rockchip@lists.infradead.org" "mark.rutland@arm.com" "robh+dt@kernel.org"] crash: WARNING: ODEBUG bug in netdev_freemem IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready device hsr_slave_0 entered promiscuous mode device hsr_slave_1 entered promiscuous mode ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4916 WARNING: CPU: 1 PID: 7089 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7089 Comm: kworker/u4:19 Not tainted 4.19.0-rc1+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x16e/0x22a lib/dump_stack.c:113 panic+0x1c6/0x37d kernel/panic.c:184 __warn.cold.8+0x120/0x16c kernel/panic.c:536 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993 RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326 Code: 1d 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd 80 e6 1d 88 4c 89 fe 48 c7 c7 20 dc 1d 88 e8 b6 1e dd fd <0f> 0b 83 05 f9 81 6a 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffff88007149ee60 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffffffff8ac61620 RBP: ffff88007149eea0 R08: ffffed000fd43ee3 R09: ffffed000fd43ee2 R10: ffffed000fd43ee2 R11: ffff88007ea1f717 R12: 0000000000000001 R13: ffffffff8919e8a0 R14: ffffffff81634f40 R15: ffffffff881de0c0 __debug_check_no_obj_freed lib/debugobjects.c:786 [inline] debug_check_no_obj_freed+0x3ae/0x58d lib/debugobjects.c:818 kfree+0xbd/0x230 mm/slab.c:3812 kvfree+0x2c/0x30 mm/util.c:449 netdev_freemem+0x47/0x60 net/core/dev.c:8842 netdev_release+0x104/0x150 net/core/net-sysfs.c:1640 device_release+0x74/0x1d0 drivers/base/core.c:891 kobject_cleanup lib/kobject.c:662 [inline] kobject_release lib/kobject.c:691 [inline] kref_put include/linux/kref.h:70 [inline] kobject_put.cold.9+0x22e/0x281 lib/kobject.c:708 netdev_run_todo+0x624/0x950 net/core/dev.c:8747 rtnl_unlock+0x9/0x10 net/core/rtnetlink.c:117 default_device_exit_batch+0x3db/0x520 net/core/dev.c:9528 ops_exit_list.isra.7+0xd9/0x130 net/core/net_namespace.c:156 cleanup_net+0x4b6/0xaa0 net/core/net_namespace.c:551 process_one_work+0xadf/0x1a20 kernel/workqueue.c:2153 worker_thread+0x176/0x12a0 kernel/workqueue.c:2296 kthread+0x327/0x3f0 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 ======================================================