bisecting fixing commit since 2d19be4653f5e74ed95560b69f94eb6791d49af3
building syzkaller on 4c37c133e4bf703d023995535f1e264d8658e08e
testing commit 2d19be4653f5e74ed95560b69f94eb6791d49af3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0f8aa9459ea096aae607f6ba308b993b744f69c5ae0661325be7e0fbfd3dbc77
run #0: basic kernel testing failed: BUG: program execution failed: executor 0: failed to write control pipe: write |1: broken pipe
run #1: crashed: general protection fault in tls_sk_proto_close
run #2: crashed: general protection fault in tls_sk_proto_close
run #3: crashed: general protection fault in tls_sk_proto_close
run #4: crashed: KASAN: slab-out-of-bounds Read in __schedule
run #5: crashed: general protection fault in tls_sk_proto_close
run #6: crashed: BUG: Bad page state
run #7: crashed: general protection fault in tls_sk_proto_close
run #8: crashed: kernel BUG in do_exit
run #9: crashed: general protection fault in corrupted
run #10: crashed: general protection fault in tls_sk_proto_close
run #11: crashed: general protection fault in tls_sk_proto_close
run #12: crashed: general protection fault in tls_sk_proto_close
run #13: crashed: general protection fault in tls_sk_proto_close
run #14: crashed: general protection fault in corrupted
run #15: crashed: general protection fault in tls_sk_proto_close
run #16: crashed: kernel panic: corrupted stack end in corrupted
run #17: crashed: general protection fault in tls_sk_proto_close
run #18: crashed: kernel panic: corrupted stack end in corrupted
run #19: crashed: general protection fault in tls_sk_proto_close
testing current HEAD 4938296e03bd227e5020d63d418956fe52baf97c
testing commit 4938296e03bd227e5020d63d418956fe52baf97c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fc9ae46fed12d712c437b9acddebeb0df5bd224efc6a7410de38b89c41487683
run #0: crashed: general protection fault in tls_sk_proto_close
run #1: crashed: BUG: Bad page state
run #2: crashed: general protection fault in tls_sk_proto_close
run #3: crashed: general protection fault in tls_sk_proto_close
run #4: crashed: BUG: Bad page state
run #5: crashed: general protection fault in tls_sk_proto_close
run #6: crashed: general protection fault in tls_sk_proto_close
run #7: crashed: general protection fault in tls_sk_proto_close
run #8: crashed: KASAN: slab-out-of-bounds Read in __schedule
run #9: crashed: general protection fault in corrupted
revisions tested: 2, total time: 22m56.777350796s (build: 16m4.195246535s, test: 6m28.337429232s)
the crash still happens on HEAD
commit msg: Linux 4.19.198
crash: general protection fault in corrupted
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
==================================================================
general protection fault: 0000 [#1] PREEMPT SMP KASAN
BUG: KASAN: slab-out-of-bounds in stack_not_used include/linux/sched/task_stack.h:101 [inline]
BUG: KASAN: slab-out-of-bounds in check_stack_usage kernel/exit.c:756 [inline]
BUG: KASAN: slab-out-of-bounds in do_exit+0x250c/0x2d90 kernel/exit.c:913
CPU: 1 PID: 9890 Comm: syz-executor.5 Not tainted 4.19.198-syzkaller #0
Read of size 8 at addr ffff8880b4df8008 by task kworker/u4:0/9915
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

RIP: 0010:__read_once_size include/linux/compiler.h:261 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:put_page include/linux/mm.h:951 [inline]
RIP: 0010:tls_sk_proto_close+0x2af/0x980 net/tls/tls_main.c:277
CPU: 0 PID: 9915 Comm: kworker/u4:0 Not tainted 4.19.198-syzkaller #0
Code: 89 ca 48 89 8d 40 ff ff ff 48 c1 ea 03 4a 8d 0c 2a 48 89 8d 68 ff ff ff 48 83 e0 fc 48 8d 78 08 49 89 c6 48 89 fe 48 c1 ee 03 <42> 80 3c 2e 00 0f 85 63 05 00 00 49 8b 76 08 48 8d 7e ff 83 e6 01
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RSP: 0018:ffff8880975ffca0 EFLAGS: 00010202
Call Trace:
RAX: 0000000000000000 RBX: ffff8880988865c0 RCX: ffffed10154f8035
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x17c/0x226 lib/dump_stack.c:118
RDX: 1ffffffff1322499 RSI: 0000000000000001 RDI: 0000000000000008
 print_address_description.cold.6+0x9/0x211 mm/kasan/report.c:256
RBP: ffff8880975ffd60 R08: ffff888097498c50 R09: 1ffffffff18c57f2
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:396
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b5300680
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880aa7c0180
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
FS:  0000000001740400(0000) GS:ffff8880ba300000(0000) knlGS:0000000000000000
 stack_not_used include/linux/sched/task_stack.h:101 [inline]
 check_stack_usage kernel/exit.c:756 [inline]
 do_exit+0x250c/0x2d90 kernel/exit.c:913
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc73d62fa8 CR3: 0000000098358000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 inet_release+0xb4/0x1b0 net/ipv4/af_inet.c:427
 inet6_release+0x46/0x60 net/ipv6/af_inet6.c:472
 __sock_release+0xc2/0x290 net/socket.c:599
 sock_close+0x10/0x20 net/socket.c:1212
 call_usermodehelper_exec_async+0x434/0x630 kernel/umh.c:129
 __fput+0x249/0x7f0 fs/file_table.c:278
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
 ____fput+0x9/0x10 fs/file_table.c:309

 task_work_run+0x108/0x180 kernel/task_work.c:113
Allocated by task 0:
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x185/0x1e0 arch/x86/entry/common.c:167
(stack is not available)

 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x413/0x4e0 arch/x86/entry/common.c:296
Freed by task 0:
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
(stack is not available)

RIP: 0033:0x41920b
The buggy address belongs to the object at ffff8880b4df80c0
 which belongs to the cache files_cache of size 832
The buggy address is located 184 bytes to the left of
 832-byte region [ffff8880b4df80c0, ffff8880b4df8400)
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
The buggy address belongs to the page:
RSP: 002b:00007ffd6ffb9c70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
page:ffffea0002d37e00 count:1 mapcount:0 mapping:ffff88813be46800 index:0x0
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 000000000041920b
flags: 0xfff00000000100(slab)
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003
raw: 00fff00000000100 ffffea00025dc0c8 ffff88813be69c48 ffff88813be46800
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2d9200fc
raw: 0000000000000000 ffff8880b4df80c0 0000000100000004 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000056c9e0
page dumped because: kasan: bad access detected
R13: 000000000056c9e0 R14: 000000000056bf60 R15: 000000000000b4e7

Modules linked in:
Memory state around the buggy address:
---[ end trace 3bc942788576d34c ]---
 ffff8880b4df7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880b4df7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8880b4df8000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff8880b4df8080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
RIP: 0010:__read_once_size include/linux/compiler.h:261 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:put_page include/linux/mm.h:951 [inline]
RIP: 0010:tls_sk_proto_close+0x2af/0x980 net/tls/tls_main.c:277
 ffff8880b4df8100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Bluetooth: hci3: command 0x0419 tx timeout
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
Bluetooth: hci4: command 0x0419 tx timeout
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
Bluetooth: hci1: command 0x0419 tx timeout
Code: 89 ca 48 89 8d 40 ff ff ff 48 c1 ea 03 4a 8d 0c 2a 48 89 8d 68 ff ff ff 48 83 e0 fc 48 8d 78 08 49 89 c6 48 89 fe 48 c1 ee 03 <42> 80 3c 2e 00 0f 85 63 05 00 00 49 8b 76 08 48 8d 7e ff 83 e6 01
Bluetooth: hci5: command 0x0419 tx timeout
CPU: 1 PID: 9926 Comm: syz-executor.1 Tainted: G    B D           4.19.198-syzkaller #0
Bluetooth: hci0: command 0x0419 tx timeout
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+0x17c/0x226 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.2+0x5/0xa lib/fault-inject.c:149
 __should_failslab+0xba/0xf0 mm/failslab.c:32
Bluetooth: hci2: command 0x0419 tx timeout
 should_failslab+0x9/0x20 mm/slab_common.c:1588
 slab_pre_alloc_hook mm/slab.h:424 [inline]
 slab_alloc mm/slab.c:3383 [inline]
 __do_kmalloc mm/slab.c:3725 [inline]
 __kmalloc+0x2b5/0x3d0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 aead_request_alloc include/crypto/aead.h:427 [inline]
 tls_push_record+0xff/0x15f0 net/tls/tls_sw.c:209
 tls_sw_sendmsg+0xb35/0x1010 net/tls/tls_sw.c:467
 inet_sendmsg+0x108/0x440 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:661
 __sys_sendto+0x1f2/0x2e0 net/socket.c:1897
RSP: 0018:ffff8880975ffca0 EFLAGS: 00010202
 __do_sys_sendto net/socket.c:1909 [inline]
 __se_sys_sendto net/socket.c:1905 [inline]
 __x64_sys_sendto+0xdc/0x1a0 net/socket.c:1905
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
RAX: 0000000000000000 RBX: ffff8880988865c0 RCX: ffffed10154f8035
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465ef9
RDX: 1ffffffff1322499 RSI: 0000000000000001 RDI: 0000000000000008
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007eff5a296188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007eff5a2961d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd408d9a9f R14: 00007eff5a296300 R15: 0000000000022000
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
RBP: ffff8880975ffd60 R08: ffff888097498c50 R09: 1ffffffff18c57f2