[ 31.067914] BUG: Bad rss-counter state mm:000000002fda1600 type:MM_FILEPAGES val:33 [ 31.069107] BUG: Bad rss-counter state mm:000000002fda1600 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.107061] ================================================================== [ 31.108007] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.108934] Read of size 8 at addr ffff88800e8695c8 by task sshd/218 [ 31.109783] [ 31.110009] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.110914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.111907] Call Trace: [ 31.112238] [ 31.112525] dump_stack_lvl+0x91/0xf0 [ 31.113023] print_report+0xcc/0x620 [ 31.113506] ? __virt_addr_valid+0x102/0x340 [ 31.114048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114686] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115297] kasan_report+0xbe/0xf0 [ 31.115767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116389] vma_interval_tree_remove+0xc75/0xec0 [ 31.116984] vma_prepare+0xc54/0x11a0 [ 31.117456] __split_vma+0x5af/0x950 [ 31.117922] ? __pfx___split_vma+0x10/0x10 [ 31.118460] ? find_held_lock+0x2c/0x110 [ 31.118974] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.119534] ? lock_is_held_type+0x9f/0x120 [ 31.120072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.120678] ? mtree_range_walk+0x632/0x900 [ 31.121228] ? mas_walk+0x5c7/0x7c0 [ 31.121700] do_vmi_munmap+0x1f1/0x2b0 [ 31.122196] mmap_region+0x1f9/0x2660 [ 31.122702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.123213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.123926] ? __pfx_lock_acquire+0x10/0x10 [ 31.124466] ? __pfx_mmap_region+0x10/0x10 [ 31.125003] ? security_mmap_addr+0x7d/0xa0 [ 31.125534] ? get_unmapped_area+0x1f5/0x3f0 [ 31.126082] do_mmap+0x854/0xf00 [ 31.126530] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.127019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.127587] ksys_mmap_pgoff+0x3af/0x500 [ 31.128109] do_syscall_64+0x3f/0x90 [ 31.128585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129231] RIP: 0033:0x7fef32412d82 [ 31.129685] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.131838] RSP: 002b:00007fff43c2d0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.132750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef32412d82 [ 31.133608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef3184c000 [ 31.134471] RBP: 00007fef3184c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.135319] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b545ec0b20 [ 31.136172] R13: 00007fff43c2d0e0 R14: 00007fff43c2d110 R15: 00007fff43c2d470 [ 31.137021] [ 31.137314] [ 31.137526] Allocated by task 211: [ 31.137955] kasan_save_stack+0x22/0x50 [ 31.138468] kasan_set_track+0x25/0x30 [ 31.138968] __kasan_slab_alloc+0x59/0x70 [ 31.139489] kmem_cache_alloc+0x16b/0x370 [ 31.140014] vm_area_dup+0x20/0x160 [ 31.140462] __split_vma+0x170/0x950 [ 31.140923] split_vma+0xc6/0x110 [ 31.141360] mprotect_fixup+0x8d2/0xb30 [ 31.141859] do_mprotect_pkey+0x87e/0xd40 [ 31.142408] __x64_sys_mprotect+0x78/0xc0 [ 31.142927] do_syscall_64+0x3f/0x90 [ 31.143396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144036] [ 31.144253] Freed by task 211: [ 31.144637] kasan_save_stack+0x22/0x50 [ 31.145138] kasan_set_track+0x25/0x30 [ 31.145622] kasan_save_free_info+0x2b/0x50 [ 31.146157] __kasan_slab_free+0x10a/0x190 [ 31.146702] kmem_cache_free+0x10d/0x4d0 [ 31.147212] rcu_core+0x8c8/0x2860 [ 31.147649] __do_softirq+0x1b7/0x7d4 [ 31.148121] [ 31.148333] Last potentially related work creation: [ 31.148908] kasan_save_stack+0x22/0x50 [ 31.149398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.149960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.150608] remove_vma+0x139/0x170 [ 31.151058] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.151607] do_vmi_munmap+0x1f1/0x2b0 [ 31.152086] __vm_munmap+0x138/0x3a0 [ 31.152546] __x64_sys_munmap+0x59/0x80 [ 31.153035] do_syscall_64+0x3f/0x90 [ 31.153512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154146] [ 31.154366] The buggy address belongs to the object at ffff88800e869570 [ 31.154366] which belongs to the cache vm_area_struct of size 168 [ 31.155825] The buggy address is located 88 bytes inside of [ 31.155825] freed 168-byte region [ffff88800e869570, ffff88800e869618) [ 31.157210] [ 31.157421] The buggy address belongs to the physical page: [ 31.158066] page:00000000a9a9f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe869 [ 31.159162] memcg:ffff88800e426601 [ 31.159578] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.160227] page_type: 0xffffffff() [ 31.160678] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a1f80 dead000000000006 [ 31.161581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e426601 [ 31.162488] page dumped because: kasan: bad access detected [ 31.163137] [ 31.163351] Memory state around the buggy address: [ 31.163919] ffff88800e869480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.164766] ffff88800e869500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.165614] >ffff88800e869580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.166482] ^ [ 31.167140] ffff88800e869600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.167978] ffff88800e869680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.168817] ================================================================== [ 31.169869] Disabling lock debugging due to kernel taint [ 33.106998] BUG: Bad rss-counter state mm:000000006ec6117d type:MM_FILEPAGES val:33 [ 33.108203] BUG: Bad rss-counter state mm:000000006ec6117d type:MM_ANONPAGES val:22 [ 33.620012] BUG: Bad rss-counter state mm:000000008ff80f01 type:MM_FILEPAGES val:33 [ 33.621174] BUG: Bad rss-counter state mm:000000008ff80f01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62824' (ECDSA) to the list of known hosts. 2023/06/20 13:46:49 fuzzer started 2023/06/20 13:46:49 dialing manager at localhost:36067 2023/06/20 13:46:49 checking machine... 2023/06/20 13:46:49 checking revisions... [ 34.289355] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:46:50 testing simple program... [ 34.342275] cgroup: Unknown subsys name 'net' [ 34.382510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c13b6 RSP=ffff88806ce09d98 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b520 R13=ffffffff813782e4 R14=ffff88806ce35000 R15=ffff88801c990410 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffdbcbb5ec8 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f1b51022510000055bb474b4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f635d10 RCX=ffffffff812e0135 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888008e37c58 RBP=1ffff110011c6f87 RSP=ffff888008e37c30 R8 =0000000000000001 R9 =ffffed10011c6f8b R10=0000000000000003 R11=0000000000000128 R12=ffff88800f635d18 R13=ffff88800f635d20 R14=ffffffff813782f8 R15=ffff88801a1ef7e8 RIP=ffffffff812e0146 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc5ae79e0b0 CR3=000000001beea000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000