bisecting cause commit starting from 8ada228ac7ed08a2c5ce035089e858b103af09c4 building syzkaller on 2f661ec405cb3975128e9851c7a5979d92d001f1 testing commit 8ada228ac7ed08a2c5ce035089e858b103af09c4 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_corruption testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_corruption testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_corruption testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_corruption testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_corruption testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.18 testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.17 testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.15 testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.1.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.3.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.5 testing commit b562e44f507e863c6792946e4e1b1449fbbac85d with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.4 testing commit afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.3 testing commit 6a13feb9c82803e2b815eca72fa7a9f5561d7861 with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.2 testing commit 64291f7db5bd8150a74ad2036f1037e6a0428df2 with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption testing release v4.1 testing commit b953c0d234bc72e8489d3bf51a276c5c4ec85345 with gcc (GCC) 5.5.0 all runs: crashed: WARNING in check_for_bios_corruption revisions tested: 25, total time: 3h28m17.115739048s (build: 1h51m33.49577955s, test: 1h29m45.652257909s) the crash already happened on the oldest tested release crash: WARNING in check_for_bios_corruption bridge0: port 2(bridge_slave_1) entered forwarding state bridge0: port 1(bridge_slave_0) entered forwarding state bridge0: port 2(bridge_slave_1) entered forwarding state Corrupted low memory at ffff880000002900 (2900 phys) = 000000e8 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 15 at arch/x86/kernel/check.c:140 check_for_bios_corruption.part.1+0xaa/0xf0 arch/x86/kernel/check.c:140() Memory corruption detected in low memory Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 15 Comm: kworker/1:0 Not tainted 4.1.0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events check_corruption ffffffff82e18a1e ffff88012b7a7be8 ffffffff8263718b 0000000000000032 ffffffff82e30ccb ffff88012b7a7c68 ffffffff8263301e 0000000000000000 ffffffff00000008 ffff88012b7a7c78 ffff88012b7a7c18 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x4f/0x7b lib/dump_stack.c:50 [] panic+0xcd/0x211 kernel/panic.c:111 [] warn_slowpath_common+0xbb/0xc0 kernel/panic.c:442 [] warn_slowpath_fmt+0x41/0x50 kernel/panic.c:458 [] check_for_bios_corruption.part.1+0xaa/0xf0 arch/x86/kernel/check.c:140 [] check_for_bios_corruption arch/x86/kernel/check.c:123 [inline] [] check_corruption+0x13/0x40 arch/x86/kernel/check.c:148 [] process_one_work+0x214/0x8d0 kernel/workqueue.c:2025 [] worker_thread+0x4b/0x470 kernel/workqueue.c:2157 [] kthread+0xea/0x100 drivers/block/aoe/aoecmd.c:1312 [] ret_from_fork+0x42/0x70 arch/x86/kernel/entry_64.S:639 Kernel Offset: disabled