bisecting fixing commit since 442489c219235991de86d0277b5d859ede6d8792 building syzkaller on b712935571355df44e126c5b27c98ccd53d1d18b testing commit 442489c219235991de86d0277b5d859ede6d8792 compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 88ac2acfccec89cef3e9015d80763712d37f136d4c477aab1ff1b3bb0034f724 all runs: crashed: WARNING in cgroup_apply_control_disable testing current HEAD fa54d366a6e4fe3e16322abdb8b5115f8be0da8b testing commit fa54d366a6e4fe3e16322abdb8b5115f8be0da8b compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.1 kernel signature: 48126b377720232b00f38ee073c56b00ce1b6beb8cf45349e220a5a3a7a6ae93 run #0: crashed: WARNING in cgroup_apply_control_disable run #1: crashed: WARNING in cgroup_apply_control_disable run #2: crashed: WARNING in cgroup_apply_control_disable run #3: crashed: WARNING in cgroup_apply_control_disable run #4: crashed: WARNING in cgroup_apply_control_disable run #5: crashed: WARNING in cgroup_apply_control_disable run #6: crashed: WARNING in cgroup_apply_control_disable run #7: crashed: WARNING in cgroup_apply_control_disable run #8: crashed: WARNING in cgroup_apply_control_disable run #9: OK revisions tested: 2, total time: 23m41.702227555s (build: 11m3.904021315s, test: 11m51.482998505s) the crash still happens on HEAD commit msg: Merge tag 'acpi-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm crash: WARNING in cgroup_apply_control_disable ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7463 at kernel/cgroup/cgroup.c:3130 cgroup_ss_mask kernel/cgroup/cgroup.c:458 [inline] WARNING: CPU: 0 PID: 7463 at kernel/cgroup/cgroup.c:3130 cgroup_apply_control_disable+0x348/0x450 kernel/cgroup/cgroup.c:3133 Modules linked in: CPU: 0 PID: 7463 Comm: syz-executor.2 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cgroup_apply_control_disable+0x348/0x450 kernel/cgroup/cgroup.c:3130 Code: 00 00 48 8d 78 08 48 89 fe 48 c1 ee 03 42 0f b6 34 3e 40 84 f6 74 0a 40 80 fe 03 0f 8e da 00 00 00 0f b7 40 08 e9 fe fe ff ff <0f> 0b e9 59 fe ff ff 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 RSP: 0018:ffffc90004f57b48 EFLAGS: 00010202 RAX: 1ffff110234fe282 RBX: ffffffff8974a400 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff87eb69e0 RDI: ffff88811a7f1410 RBP: ffff88812400c000 R08: 0000000000000001 R09: ffffffff8c243be7 R10: fffffbfff184877c R11: 0000000000000903 R12: ffffffff896f3180 R13: ffff88811a7f1400 R14: ffff88812400c000 R15: dffffc0000000000 FS: 00000000010df400(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000533034 CR3: 000000011015e005 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cgroup_finalize_control kernel/cgroup/cgroup.c:3197 [inline] rebind_subsystems+0x33a/0xc00 kernel/cgroup/cgroup.c:1758 cgroup_setup_root+0x37d/0x840 kernel/cgroup/cgroup.c:2002 cgroup1_root_to_use kernel/cgroup/cgroup-v1.c:1197 [inline] cgroup1_get_tree+0x774/0xb50 kernel/cgroup/cgroup-v1.c:1214 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2919 [inline] path_mount+0x7f3/0x1a00 fs/namespace.c:3249 do_mount fs/namespace.c:3262 [inline] __do_sys_mount fs/namespace.c:3470 [inline] __se_sys_mount fs/namespace.c:3447 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3447 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465c7a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 88 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcbc653348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffcbc653388 RCX: 0000000000465c7a RDX: 00000000004b753b RSI: 00000000004ad236 RDI: 00000000004ad1f9 RBP: 00007ffcbc653380 R08: 00000000004bc388 R09: 00007ffcbc652dc0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbc653380 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000400520 irq event stamp: 3543 hardirqs last enabled at (3551): [] console_unlock+0x72b/0x9c0 kernel/printk/printk.c:2668 hardirqs last disabled at (3580): [] __schedule+0x116e/0x2170 kernel/sched/core.c:5834 softirqs last enabled at (3610): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (3610): [] __irq_exit_rcu kernel/softirq.c:636 [inline] softirqs last enabled at (3610): [] irq_exit_rcu+0x229/0x270 kernel/softirq.c:648 softirqs last disabled at (3625): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (3625): [] __irq_exit_rcu kernel/softirq.c:636 [inline] softirqs last disabled at (3625): [] irq_exit_rcu+0x229/0x270 kernel/softirq.c:648 ---[ end trace 7b46631022111c41 ]---