bisecting fixing commit since 442489c219235991de86d0277b5d859ede6d8792
building syzkaller on b712935571355df44e126c5b27c98ccd53d1d18b
testing commit 442489c219235991de86d0277b5d859ede6d8792 with gcc (GCC) 8.1.0
kernel signature: 9d269aa858749cded1fee092630e897da84bcb4d591f1d1a9278c06b82d1f499
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: OK
run #8: OK
run #9: OK
testing current HEAD b5fc7a89e58bcc059a3d5e4db79c481fb437de59
testing commit b5fc7a89e58bcc059a3d5e4db79c481fb437de59 with gcc (GCC) 8.1.0
kernel signature: b4086ad5fa2c34cc6b94e29a439e8d794166f26d2cb2662cff784bf4e493784c
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: OK
run #9: OK
revisions tested: 2, total time: 29m42.370304117s (build: 9m59.297492943s, test: 19m8.327139715s)
the crash still happens on HEAD
commit msg: Merge tag 'overflow-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
crash: WARNING in cgroup_apply_control_disable
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8258 at kernel/cgroup/cgroup.c:3104 cgroup_ss_mask kernel/cgroup/cgroup.c:445 [inline]
WARNING: CPU: 0 PID: 8258 at kernel/cgroup/cgroup.c:3104 cgroup_apply_control_disable+0x131/0x150 kernel/cgroup/cgroup.c:3107
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8258 Comm: syz-executor.3 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xa3/0xc8 lib/dump_stack.c:118
 panic+0x135/0x31a kernel/panic.c:231
 __warn.cold.13+0x20/0x20 kernel/panic.c:600
 report_bug+0xc0/0xf0 lib/bug.c:198
 handle_bug+0x35/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x13/0x60 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:cgroup_apply_control_disable+0x131/0x150 kernel/cgroup/cgroup.c:3104
Code: 3b e8 13 96 ff ff 84 c0 75 84 e9 69 ff ff ff 48 89 df e8 22 bb ff ff e9 72 ff ff ff 49 8b 84 24 80 02 00 00 0f b7 40 08 eb c1 <0f> 0b eb 8e 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 90 66
RSP: 0018:ffffc90002b6fce8 EFLAGS: 00010202
RAX: ffff88810f6aa800 RBX: ffff88810f6aa800 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff83e751c7 RDI: 0000000000000282
RBP: ffffffff843e1d00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88810f674000
R13: ffff88810f674000 R14: ffffffff843e1d28 R15: ffffffff843ef520
 cgroup_finalize_control kernel/cgroup/cgroup.c:3171 [inline]
 rebind_subsystems+0x198/0x3f0 kernel/cgroup/cgroup.c:1743
 cgroup_setup_root+0x151/0x3a0 kernel/cgroup/cgroup.c:1977
 cgroup1_root_to_use kernel/cgroup/cgroup-v1.c:1190 [inline]
 cgroup1_get_tree+0x41d/0x690 kernel/cgroup/cgroup-v1.c:1207
 vfs_get_tree+0x1d/0xb0 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x6e9/0xa60 fs/namespace.c:3203
 do_mount+0x70/0x90 fs/namespace.c:3216
 __do_sys_mount fs/namespace.c:3424 [inline]
 __se_sys_mount fs/namespace.c:3401 [inline]
 __x64_sys_mount+0xbf/0xe0 fs/namespace.c:3401
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45f72a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd 8b fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 aa 8b fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffd0f012e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd0f012ed0 RCX: 000000000045f72a
RDX: 00000000004cbd9e RSI: 00000000004c18a5 RDI: 00000000004c1868
RBP: 0000000000000000 R08: 00000000004d0bb8 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000418760
R13: 00007ffd0f0130f8 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..