================================================================== BUG: KASAN: stack-out-of-bounds in jhash2 include/linux/jhash.h:128 [inline] BUG: KASAN: stack-out-of-bounds in hash+0x227/0xc20 kernel/bpf/bloom_filter.c:36 Read of size 4 at addr ffffc90000ee7bc0 by task syz-executor305/301 CPU: 1 PID: 301 Comm: syz-executor305 Not tainted 6.1.68-syzkaller-00105-gf085398f0e8f #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+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 jhash2 include/linux/jhash.h:128 [inline] hash+0x227/0xc20 kernel/bpf/bloom_filter.c:36 bloom_map_peek_elem+0xac/0x1a0 kernel/bpf/bloom_filter.c:51 bpf_prog_00798911c748094f+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:982 [inline] __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run include/linux/filter.h:607 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2275 [inline] bpf_trace_run2+0x133/0x290 kernel/trace/bpf_trace.c:2314 __bpf_trace_ext4_drop_inode+0x23/0x30 include/trace/events/ext4.h:251 __traceiter_ext4_drop_inode+0x75/0xc0 include/trace/events/ext4.h:251 trace_ext4_drop_inode include/trace/events/ext4.h:251 [inline] ext4_drop_inode+0x145/0x1a0 fs/ext4/super.c:1366 iput_final fs/inode.c:1759 [inline] iput+0x393/0x870 fs/inode.c:1815 do_unlinkat+0x4db/0x910 fs/namei.c:4327 __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f46f45e7f87 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd62b61488 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f46f45e7f87 RDX: 00007ffd62b614b0 RSI: 00007ffd62b61540 RDI: 00007ffd62b61540 RBP: 00007ffd62b61540 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd62b625b0 R13: 000055555680b6c0 R14: 00007ffd62b625b0 R15: 0000000000000001 The buggy address belongs to stack of task syz-executor305/301 and is located at offset 0 in frame: bpf_trace_run2+0x0/0x290 This frame has 1 object: [32, 48) 'args' The buggy address belongs to the virtual mapping at [ffffc90000ee0000, ffffc90000ee9000) created by: copy_process+0x5c3/0x3530 kernel/fork.c:2199 The buggy address belongs to the physical page: page:ffffea0004866e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1219b9 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 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 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 294, tgid 294 (syz-executor305), ts 23192241114, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2566 prep_new_page+0x1b/0x110 mm/page_alloc.c:2573 get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4397 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5684 __vmalloc_area_node mm/vmalloc.c:3062 [inline] __vmalloc_node_range+0x89b/0x1540 mm/vmalloc.c:3234 alloc_thread_stack_node kernel/fork.c:318 [inline] dup_task_struct+0x3d6/0x7d0 kernel/fork.c:1080 copy_process+0x5c3/0x3530 kernel/fork.c:2199 kernel_clone+0x229/0x890 kernel/fork.c:2786 __do_sys_clone kernel/fork.c:2929 [inline] __se_sys_clone kernel/fork.c:2913 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2913 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd page_owner free stack trace missing Memory state around the buggy address: ffffc90000ee7a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90000ee7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90000ee7b80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 ^ ffffc90000ee7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90000ee7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== BUG: unable to handle page fault for address: ffffc90000ee8000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 100000067 P4D 100000067 PUD 100154067 PMD 11df02067 PTE 0 Oops: 0000 [#2] PREEMPT SMP KASAN CPU: 1 PID: 301 Comm: syz-executor305 Tainted: G B D 6.1.68-syzkaller-00105-gf085398f0e8f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:jhash2 include/linux/jhash.h:127 [inline] RIP: 0010:hash+0xfe/0xc20 kernel/bpf/bloom_filter.c:36 Code: fc ff df 0f b6 04 10 84 c0 0f 85 c1 00 00 00 45 03 6e f4 48 8d 7e 04 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 db 00 00 00 <41> 03 5e f8 48 8d 7e 08 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f RSP: 0018:ffffc90000ee7ac8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 00000000a08811c8 RCX: ffffffff8191d465 RDX: dffffc0000000000 RSI: ffffc90000ee7ffc RDI: ffffc90000ee8000 RBP: ffffc90000ee7b08 R08: 000000003ffffe60 R09: fffffbfff0ee5cfd R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000025eb6cef R13: 000000006b0a4089 R14: ffffc90000ee8008 R15: ffffc90000ee7ffc FS: 000055555680a380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000ee8000 CR3: 00000001219ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bloom_map_peek_elem+0xac/0x1a0 kernel/bpf/bloom_filter.c:51 bpf_prog_00798911c748094f+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:982 [inline] __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run include/linux/filter.h:607 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2275 [inline] bpf_trace_run2+0x133/0x290 kernel/trace/bpf_trace.c:2314 __bpf_trace_ext4_drop_inode+0x23/0x30 include/trace/events/ext4.h:251 __traceiter_ext4_drop_inode+0x75/0xc0 include/trace/events/ext4.h:251 trace_ext4_drop_inode include/trace/events/ext4.h:251 [inline] ext4_drop_inode+0x145/0x1a0 fs/ext4/super.c:1366 iput_final fs/inode.c:1759 [inline] iput+0x393/0x870 fs/inode.c:1815 do_unlinkat+0x4db/0x910 fs/namei.c:4327 __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f46f45e7f87 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd62b61488 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f46f45e7f87 RDX: 00007ffd62b614b0 RSI: 00007ffd62b61540 RDI: 00007ffd62b61540 RBP: 00007ffd62b61540 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd62b625b0 R13: 000055555680b6c0 R14: 00007ffd62b625b0 R15: 0000000000000001 Modules linked in: CR2: ffffc90000ee8000 ---[ end trace 0000000000000000 ]--- RIP: 0010:jhash2 include/linux/jhash.h:127 [inline] RIP: 0010:hash+0xfe/0xc20 kernel/bpf/bloom_filter.c:36 Code: fc ff df 0f b6 04 10 84 c0 0f 85 c1 00 00 00 45 03 6e f4 48 8d 7e 04 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 db 00 00 00 <41> 03 5e f8 48 8d 7e 08 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f RSP: 0018:ffffc90000ea7ac8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 000000007f86ddb9 RCX: ffffffff8191d465 RDX: dffffc0000000000 RSI: ffffc90000ea7ffc RDI: ffffc90000ea8000 RBP: ffffc90000ea7b08 R08: 000000003ffffe60 R09: fffffbfff0e9dfd6 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000a6797140 R13: 00000000459fe696 R14: ffffc90000ea8008 R15: ffffc90000ea7ffc FS: 000055555680a380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000ee8000 CR3: 00000001219ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 10 84 c0 0f 85 c1 00 adc %al,0xc1850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 45 03 6e f4 add -0xc(%r14),%r13d 11: 48 8d 7e 04 lea 0x4(%rsi),%rdi 15: 48 89 f8 mov %rdi,%rax 18: 48 c1 e8 03 shr $0x3,%rax 1c: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 20: 84 c0 test %al,%al 22: 0f 85 db 00 00 00 jne 0x103 * 28: 41 03 5e f8 add -0x8(%r14),%ebx <-- trapping instruction 2c: 48 8d 7e 08 lea 0x8(%rsi),%rdi 30: 48 89 f8 mov %rdi,%rax 33: 48 c1 e8 03 shr $0x3,%rax 37: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 3b: 84 c0 test %al,%al 3d: 0f .byte 0xf