fuse: Bad value for 'user_id'
fuse: Bad value for 'user_id'
==================================================================
BUG: KASAN: global-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: global-out-of-bounds in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1536 [inline]
BUG: KASAN: global-out-of-bounds in try_module_get+0x4c/0xd0 kernel/module/main.c:913
Write of size 4 at addr ffffffff8c4be4b8 by task syz.2.7070/31427

CPU: 0 UID: 0 PID: 31427 Comm: syz.2.7070 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x156/0x4c9 mm/kasan/report.c:482
 kasan_report+0xdf/0x1a0 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:186 [inline]
 kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1536 [inline]
 try_module_get+0x4c/0xd0 kernel/module/main.c:913
 dvb_device_open+0x124/0x3b0 drivers/media/dvb-core/dvbdev.c:103
 chrdev_open+0x234/0x6a0 fs/char_dev.c:411
 do_dentry_open+0x6d8/0x1660 fs/open.c:949
 vfs_open+0x82/0x3f0 fs/open.c:1081
 do_open fs/namei.c:4671 [inline]
 path_openat+0x208c/0x31a0 fs/namei.c:4830
 do_file_open+0x20e/0x430 fs/namei.c:4859
 do_sys_openat2+0x10d/0x1e0 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2b1835c84e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f2b19175b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2b191766c0 RCX: 00007f2b1835c84e
RDX: 0000000000000002 RSI: 00007f2b19175c00 RDI: ffffffffffffff9c
RBP: 00007f2b19175c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f2b18616038 R14: 00007f2b18615fa0 R15: 00007ffd1e08a188
 </TASK>

The buggy address belongs to the variable:
 __func__.2+0x38/0x40

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4be
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea0000312f88 ffffea0000312f88 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8c4be380: f9 f9 f9 f9 00 00 00 00 00 03 f9 f9 f9 f9 f9 f9
 ffffffff8c4be400: 00 03 f9 f9 f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9
>ffffffff8c4be480: 00 05 f9 f9 f9 f9 f9 f9 00 00 02 f9 f9 f9 f9 f9
                                        ^
 ffffffff8c4be500: 00 07 f9 f9 f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9
 ffffffff8c4be580: 00 00 02 f9 f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9
==================================================================