loop0: detected capacity change from 0 to 2048 sr 2:0:0:0: [sr0] tag#11 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 2:0:0:0: [sr0] tag#11 CDB: Service action out(16), sa=0x18 9f b8 03 f4 b9 03 0d fe 0f a6 6e b5 ================================================================== BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x396/0x430 mm/vmalloc.c:4093 Write of size 4064 at addr ffffc9000d651020 by task syz.0.0/5311 CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xb4/0x290 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x29a/0x2b0 mm/kasan/generic.c:189 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 vrealloc_noprof+0x396/0x430 mm/vmalloc.c:4093 push_insn_history+0x184/0x650 kernel/bpf/verifier.c:3874 do_check+0x597/0xd630 kernel/bpf/verifier.c:19450 do_check_common+0x168d/0x20b0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x13679/0x19a70 kernel/bpf/verifier.c:24033 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2971 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f05a018e969 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f05a0ffc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f05a03b5fa0 RCX: 00007f05a018e969 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007f05a0210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f05a03b5fa0 R15: 00007ffcbb602378 The buggy address belongs to the virtual mapping at [ffffc9000d631000, ffffc9000d653000) created by: kvrealloc_noprof+0x82/0xe0 mm/slub.c:5109 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88803fe18280 pfn:0x3fe18 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88803fe18280 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN), pid 5311, tgid 5310 (syz.0.0), ts 77605997559, free_ts 76756688385 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x21ce/0x22b0 mm/page_alloc.c:3688 __alloc_pages_slowpath+0x2fe/0xcc0 mm/page_alloc.c:4509 __alloc_frozen_pages_noprof+0x319/0x370 mm/page_alloc.c:4983 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2392 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x8fe/0x12c0 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x3a0/0x5e0 mm/slub.c:5034 kvrealloc_noprof+0x82/0xe0 mm/slub.c:5109 push_insn_history+0x184/0x650 kernel/bpf/verifier.c:3874 do_check+0x597/0xd630 kernel/bpf/verifier.c:19450 do_check_common+0x168d/0x20b0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x13679/0x19a70 kernel/bpf/verifier.c:24033 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2971 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 page last free pid 5309 tgid 5309 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xb0e/0xcd0 mm/page_alloc.c:2725 discard_slab mm/slub.c:2716 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3185 put_cpu_partial+0x17c/0x250 mm/slub.c:3260 __slab_free+0x2f7/0x400 mm/slub.c:4512 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] __kmalloc_cache_noprof+0x1be/0x3d0 mm/slub.c:4353 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] drm_atomic_state_alloc+0xa9/0x100 drivers/gpu/drm/drm_atomic.c:173 drm_atomic_helper_dirtyfb+0xed/0xee0 drivers/gpu/drm/drm_damage_helper.c:126 drm_fbdev_shmem_helper_fb_dirty+0x15d/0x2f0 drivers/gpu/drm/drm_fbdev_shmem.c:117 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:379 [inline] drm_fb_helper_damage_work+0x221/0x710 drivers/gpu/drm/drm_fb_helper.c:402 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 Memory state around the buggy address: ffffc9000d650f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000d650f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000d651000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000d651080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000d651100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================