================================================================== BUG: KASAN: stack-out-of-bounds in __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] BUG: KASAN: stack-out-of-bounds in jhash+0x200/0x740 include/linux/jhash.h:82 Read of size 4 at addr ffffc90004eff300 by task syz-executor.2/8292 CPU: 0 PID: 8292 Comm: syz-executor.2 Not tainted 6.8.0-syzkaller-05236-g443574b03387 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 __get_unaligned_cpu32 include/linux/unaligned/packed_struct.h:19 [inline] jhash+0x200/0x740 include/linux/jhash.h:82 hash+0x339/0x410 kernel/bpf/bloom_filter.c:31 bloom_map_peek_elem+0xb2/0x1b0 kernel/bpf/bloom_filter.c:43 bpf_prog_00798911c748094f+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run3+0x238/0x460 kernel/trace/bpf_trace.c:2421 trace_ext4_es_insert_delayed_block include/trace/events/ext4.h:2481 [inline] ext4_es_insert_delayed_block+0x9a8/0xa10 fs/ext4/extents_status.c:2082 ext4_insert_delayed_block fs/ext4/inode.c:1676 [inline] ext4_da_map_blocks fs/ext4/inode.c:1777 [inline] ext4_da_get_block_prep+0xa67/0x1420 fs/ext4/inode.c:1817 ext4_block_write_begin+0x53b/0x1850 fs/ext4/inode.c:1055 ext4_da_write_begin+0x5e8/0xa50 fs/ext4/inode.c:2894 generic_perform_write+0x322/0x640 mm/filemap.c:3921 ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299 ext4_file_write_iter+0x1de/0x1a10 call_write_iter include/linux/fs.h:2108 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa84/0xcb0 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7feea687dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007feea76a80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007feea69abf80 RCX: 00007feea687dea9 RDX: 0000000000002009 RSI: 0000000020000180 RDI: 0000000000000007 RBP: 00007feea68ca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007feea69abf80 R15: 00007ffdf10dbfc8 The buggy address belongs to stack of task syz-executor.2/8292 and is located at offset 0 in frame: bpf_trace_run3+0x0/0x460 This frame has 1 object: [32, 56) 'args' The buggy address belongs to the virtual mapping at [ffffc90004ef8000, ffffc90004f01000) created by: copy_process+0x5d1/0x3df0 kernel/fork.c:2219 The buggy address belongs to the physical page: page:ffffea00007ccf00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f33c memcg:ffff888021e1cc02 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888021e1cc02 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 8275, tgid 8275 (syz-executor.3), ts 198396156100, free_ts 197729636533 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569 alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133 vm_area_alloc_pages mm/vmalloc.c:3135 [inline] __vmalloc_area_node mm/vmalloc.c:3211 [inline] __vmalloc_node_range+0x9a4/0x14a0 mm/vmalloc.c:3392 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1114 copy_process+0x5d1/0x3df0 kernel/fork.c:2219 kernel_clone+0x21e/0x8d0 kernel/fork.c:2796 __do_sys_clone3 kernel/fork.c:3097 [inline] __se_sys_clone3+0x2cb/0x350 kernel/fork.c:3081 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 page last free pid 8260 tgid 8259 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532 release_pages+0x2744/0x2a80 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline] tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392 exit_mmap+0x4b6/0xd40 mm/mmap.c:3300 __mmput+0x115/0x3c0 kernel/fork.c:1345 exit_mm+0x220/0x310 kernel/exit.c:569 do_exit+0x99e/0x27e0 kernel/exit.c:865 do_group_exit+0x207/0x2c0 kernel/exit.c:1027 get_signal+0x176e/0x1850 kernel/signal.c:2907 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Memory state around the buggy address: ffffc90004eff200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004eff280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004eff300: f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 ^ ffffc90004eff380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004eff400: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 f3 f3 f3 ==================================================================