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BUG: KASAN: global-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:112 [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:941
Write of size 4 at addr ffffffff8c4f28f8 by task syz.2.1103/9669

CPU: 1 UID: 0 PID: 9669 Comm: syz.2.1103 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1c0 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:112 [inline]
 atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1536 [inline]
 try_module_get+0x4c/0xd0 kernel/module/main.c:941
 dvb_device_open+0x124/0x3b0 drivers/media/dvb-core/dvbdev.c:103
 chrdev_open+0x234/0x6a0 fs/char_dev.c:411
 do_dentry_open+0x6ab/0x14d0 fs/open.c:947
 vfs_open+0x82/0x3f0 fs/open.c:1079
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2873/0x4280 fs/namei.c:4859
 do_file_open+0x20e/0x430 fs/namei.c:4888
 do_sys_openat2+0x10f/0x1e0 fs/open.c:1395
 do_sys_open fs/open.c:1401 [inline]
 __do_sys_openat fs/open.c:1417 [inline]
 __se_sys_openat fs/open.c:1412 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1412
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9bf335d68e
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:00007f9bf4307b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9bf43086c0 RCX: 00007f9bf335d68e
RDX: 0000000000000002 RSI: 00007f9bf4307c00 RDI: ffffffffffffff9c
RBP: 00007f9bf4307c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f9bf3616038 R14: 00007f9bf3615fa0 R15: 00007fff12ee23c8
 </TASK>

The buggy address belongs to the variable:
 __func__.1+0x18/0x40

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4f2
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea0000313c88 ffffea0000313c88 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:
 ffffffff8c4f2780: 00 00 00 05 f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9
 ffffffff8c4f2800: 07 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 03 f9 f9
>ffffffff8c4f2880: f9 f9 f9 f9 00 03 f9 f9 f9 f9 f9 f9 00 07 f9 f9
                                                                ^
 ffffffff8c4f2900: f9 f9 f9 f9 00 05 f9 f9 f9 f9 f9 f9 00 00 02 f9
 ffffffff8c4f2980: f9 f9 f9 f9 00 07 f9 f9 f9 f9 f9 f9 00 07 f9 f9
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