================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:112 [inline] BUG: KASAN: slab-out-of-bounds in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1536 [inline] BUG: KASAN: slab-out-of-bounds in try_module_get+0x46/0xc0 kernel/module/main.c:913 Write of size 4 at addr ffff88802acec508 by task syz.5.8015/14054 CPU: 1 UID: 0 PID: 14054 Comm: syz.5.8015 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 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+0x46/0xc0 kernel/module/main.c:913 dvb_device_open+0xef/0x350 drivers/media/dvb-core/dvbdev.c:103 chrdev_open+0x4cd/0x5e0 fs/char_dev.c:411 do_dentry_open+0x785/0x14e0 fs/open.c:949 vfs_open+0x3b/0x340 fs/open.c:1081 do_open fs/namei.c:4671 [inline] path_openat+0x2e08/0x3860 fs/namei.c:4830 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 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+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbdff55cece 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 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007fbe004a5b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fbe004a66c0 RCX: 00007fbdff55cece RDX: 0000000000000200 RSI: 00007fbe004a5c00 RDI: ffffffffffffff9c RBP: 00007fbe004a5c00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007fbdff816038 R14: 00007fbdff815fa0 R15: 00007fbdff93fa48 Allocated by task 1: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5339 kmalloc_noprof include/linux/slab.h:962 [inline] kzalloc_noprof include/linux/slab.h:1204 [inline] bus_add_driver+0x162/0x670 drivers/base/bus.c:699 driver_register+0x23a/0x320 drivers/base/driver.c:249 i2c_register_driver+0xbb/0x1a0 drivers/i2c/i2c-core-base.c:2019 do_one_initcall+0x250/0x8d0 init/main.c:1382 do_initcall_level+0x104/0x190 init/main.c:1444 do_initcalls+0x59/0xa0 init/main.c:1460 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1692 kernel_init+0x1d/0x1d0 init/main.c:1582 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88802acec400 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 56 bytes to the right of allocated 208-byte region [ffff88802acec400, ffff88802acec4d0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802aced800 pfn:0x2acec head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88813fea8b40 ffffea0001e62810 ffffea0001f35190 raw: ffff88802aced800 000000000010000a 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88813fea8b40 ffffea0001e62810 ffffea0001f35190 head: ffff88802aced800 000000000010000a 00000000f5000000 0000000000000000 head: 00fff00000000001 ffffea0000ab3b01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 9552737752, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1888 prep_new_page mm/page_alloc.c:1896 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3961 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5249 alloc_slab_page mm/slub.c:3255 [inline] allocate_slab+0x77/0x660 mm/slub.c:3444 new_slab mm/slub.c:3502 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7134 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x2b9/0x620 mm/slub.c:4578 alloc_from_pcs mm/slub.c:4681 [inline] slab_alloc_node mm/slub.c:4815 [inline] __kmalloc_cache_noprof+0x392/0x660 mm/slub.c:5334 kmalloc_noprof include/linux/slab.h:962 [inline] usb_string+0x111/0x7d0 drivers/usb/core/message.c:980 usb_cache_string+0x80/0x140 drivers/usb/core/message.c:1030 usb_enumerate_device drivers/usb/core/hub.c:2538 [inline] usb_new_device+0x2fd/0x16f0 drivers/usb/core/hub.c:2665 register_root_hub+0x270/0x5f0 drivers/usb/core/hcd.c:990 usb_add_hcd+0xba1/0x10b0 drivers/usb/core/hcd.c:2989 vhci_hcd_probe+0x1fa/0x3e0 drivers/usb/usbip/vhci_hcd.c:1401 platform_probe+0xf9/0x190 drivers/base/platform.c:1446 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:661 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:803 page_owner free stack trace missing Memory state around the buggy address: ffff88802acec400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802acec480: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc >ffff88802acec500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802acec580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802acec600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================