================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: slab-out-of-bounds in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:615 [inline] BUG: KASAN: slab-out-of-bounds in try_module_get+0x4f/0xf0 kernel/module/main.c:838 Write of size 4 at addr ffff8880202d0408 by task syz.5.1460/10098 CPU: 1 PID: 10098 Comm: syz.5.1460 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x235/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:615 [inline] try_module_get+0x4f/0xf0 kernel/module/main.c:838 dvb_device_open+0xf1/0x370 drivers/media/dvb-core/dvbdev.c:103 chrdev_open+0x5c5/0x6a0 fs/char_dev.c:414 do_dentry_open+0x7e9/0x10d0 fs/open.c:882 do_open fs/namei.c:3634 [inline] path_openat+0x2635/0x2ee0 fs/namei.c:3791 do_filp_open+0x1f1/0x430 fs/namei.c:3818 do_sys_openat2+0x150/0x4b0 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f22b455c84e 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:00007f22b54c3b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f22b54c46c0 RCX: 00007f22b455c84e RDX: 0000000000040002 RSI: 00007f22b54c3c00 RDI: ffffffffffffff9c RBP: 00007f22b54c3c00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007f22b4816038 R14: 00007f22b4815fa0 R15: 00007ffd6e494aa8 Allocated by task 1: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:53 ____kasan_kmalloc mm/kasan/common.c:375 [inline] __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384 kmalloc_node include/linux/slab.h:585 [inline] kzalloc_node include/linux/slab.h:710 [inline] get_unbound_pool kernel/workqueue.c:3664 [inline] alloc_unbound_pwq+0xa45/0x1690 kernel/workqueue.c:3846 apply_wqattrs_prepare+0x45c/0xbb0 kernel/workqueue.c:3997 apply_workqueue_attrs_locked kernel/workqueue.c:4080 [inline] apply_workqueue_attrs+0xd7/0x180 kernel/workqueue.c:4117 alloc_and_link_pwqs kernel/workqueue.c:4241 [inline] alloc_workqueue+0xe97/0x1450 kernel/workqueue.c:4349 ib_core_init+0xfe/0x38a drivers/infiniband/core/device.c:2793 do_one_initcall+0x26a/0x840 init/main.c:1310 do_initcall_level+0x137/0x1e4 init/main.c:1383 do_initcalls+0x4b/0x8a init/main.c:1399 kernel_init_freeable+0x415/0x5be init/main.c:1638 kernel_init+0x19/0x1b0 init/main.c:1526 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff8880202d0000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 8 bytes to the right of 1024-byte region [ffff8880202d0000, ffff8880202d0400) The buggy address belongs to the physical page: page:ffffea000080b400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x202d0 head:ffffea000080b400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888017441dc0 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 3992347716, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559 prep_new_page mm/page_alloc.c:2566 [inline] get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5643 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x4f/0x160 mm/slub.c:1801 allocate_slab mm/slub.c:1944 [inline] new_slab+0x87/0x2c0 mm/slub.c:1997 ___slab_alloc+0xbc6/0x1240 mm/slub.c:3154 __slab_alloc mm/slub.c:3240 [inline] slab_alloc_node mm/slub.c:3325 [inline] __kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398 kmalloc_node_trace+0x22/0xe0 mm/slab_common.c:1039 kmalloc_node include/linux/slab.h:585 [inline] kzalloc_node include/linux/slab.h:710 [inline] get_unbound_pool kernel/workqueue.c:3664 [inline] alloc_unbound_pwq+0xa45/0x1690 kernel/workqueue.c:3846 apply_wqattrs_prepare+0x45c/0xbb0 kernel/workqueue.c:3997 apply_workqueue_attrs_locked kernel/workqueue.c:4080 [inline] apply_workqueue_attrs+0xd7/0x180 kernel/workqueue.c:4117 alloc_and_link_pwqs kernel/workqueue.c:4241 [inline] alloc_workqueue+0xe97/0x1450 kernel/workqueue.c:4349 ib_core_init+0xfe/0x38a drivers/infiniband/core/device.c:2793 do_one_initcall+0x26a/0x840 init/main.c:1310 do_initcall_level+0x137/0x1e4 init/main.c:1383 do_initcalls+0x4b/0x8a init/main.c:1399 page_owner free stack trace missing Memory state around the buggy address: ffff8880202d0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880202d0380: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc >ffff8880202d0400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880202d0480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880202d0500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================