syzkaller login: [ 31.105393] BUG: Bad rss-counter state mm:00000000a85baca4 type:MM_FILEPAGES val:33 [ 31.106877] BUG: Bad rss-counter state mm:00000000a85baca4 type:MM_ANONPAGES val:22 [ 31.191459] ================================================================== [ 31.192583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.193745] Read of size 8 at addr ffff88800e271968 by task sshd/220 [ 31.194855] [ 31.195126] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197327] Call Trace: [ 31.197648] [ 31.197933] dump_stack_lvl+0x91/0xf0 [ 31.198422] print_report+0xcc/0x620 [ 31.198908] ? __virt_addr_valid+0x102/0x340 [ 31.199458] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200702] kasan_report+0xbe/0xf0 [ 31.201173] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201793] vma_interval_tree_remove+0xc75/0xec0 [ 31.202394] vma_prepare+0xc54/0x11a0 [ 31.202865] __split_vma+0x5af/0x950 [ 31.203345] ? __pfx___split_vma+0x10/0x10 [ 31.203873] ? find_held_lock+0x2c/0x110 [ 31.204404] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.204972] ? lock_is_held_type+0x9f/0x120 [ 31.205510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.206108] ? mtree_range_walk+0x632/0x900 [ 31.206656] ? mas_walk+0x5c7/0x7c0 [ 31.207134] do_vmi_munmap+0x1f1/0x2b0 [ 31.207630] mmap_region+0x1f9/0x2660 [ 31.208116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.208647] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.209361] ? __pfx_lock_acquire+0x10/0x10 [ 31.209888] ? __pfx_mmap_region+0x10/0x10 [ 31.210417] ? security_mmap_addr+0x7d/0xa0 [ 31.210944] ? get_unmapped_area+0x1f5/0x3f0 [ 31.211500] do_mmap+0x854/0xf00 [ 31.211932] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213010] ksys_mmap_pgoff+0x3af/0x500 [ 31.213512] do_syscall_64+0x3f/0x90 [ 31.213988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214640] RIP: 0033:0x7f45a69b0d82 [ 31.215100] 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 [ 31.217246] RSP: 002b:00007fff5872a0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.218140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45a69b0d82 [ 31.218973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45a5dea000 [ 31.219826] RBP: 00007f45a5dea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.220681] R10: 0000000000000812 R11: 0000000000000206 R12: 000055578b1a1ec0 [ 31.221532] R13: 00007fff5872a0e0 R14: 00007fff5872a110 R15: 00007fff5872a470 [ 31.222399] [ 31.222691] [ 31.222912] Allocated by task 213: [ 31.223336] kasan_save_stack+0x22/0x50 [ 31.223839] kasan_set_track+0x25/0x30 [ 31.224338] __kasan_slab_alloc+0x59/0x70 [ 31.224860] kmem_cache_alloc+0x16b/0x370 [ 31.225380] vm_area_dup+0x20/0x160 [ 31.225834] __split_vma+0x170/0x950 [ 31.226304] split_vma+0xc6/0x110 [ 31.226741] mprotect_fixup+0x8d2/0xb30 [ 31.227252] do_mprotect_pkey+0x87e/0xd40 [ 31.227774] __x64_sys_mprotect+0x78/0xc0 [ 31.228294] do_syscall_64+0x3f/0x90 [ 31.228789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229429] [ 31.229651] Freed by task 213: [ 31.230043] kasan_save_stack+0x22/0x50 [ 31.230544] kasan_set_track+0x25/0x30 [ 31.231039] kasan_save_free_info+0x2b/0x50 [ 31.231570] __kasan_slab_free+0x10a/0x190 [ 31.232102] kmem_cache_free+0x10d/0x4d0 [ 31.232614] rcu_core+0x8c8/0x2860 [ 31.233068] __do_softirq+0x1b7/0x7d4 [ 31.233546] [ 31.233763] Last potentially related work creation: [ 31.234345] kasan_save_stack+0x22/0x50 [ 31.234848] __kasan_record_aux_stack+0x8e/0xa0 [ 31.235428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.236161] remove_vma+0x139/0x170 [ 31.236633] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.237193] do_vmi_munmap+0x1f1/0x2b0 [ 31.237679] __vm_munmap+0x138/0x3a0 [ 31.238152] __x64_sys_munmap+0x59/0x80 [ 31.238647] do_syscall_64+0x3f/0x90 [ 31.239124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239765] [ 31.239989] The buggy address belongs to the object at ffff88800e271910 [ 31.239989] which belongs to the cache vm_area_struct of size 168 [ 31.241447] The buggy address is located 88 bytes inside of [ 31.241447] freed 168-byte region [ffff88800e271910, ffff88800e2719b8) [ 31.242862] [ 31.243077] The buggy address belongs to the physical page: [ 31.243744] page:000000008808f22e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe271 [ 31.244851] memcg:ffff88801971a001 [ 31.245285] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.245929] page_type: 0xffffffff() [ 31.246384] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801971a001 [ 31.248231] page dumped because: kasan: bad access detected [ 31.248918] [ 31.249134] Memory state around the buggy address: [ 31.249708] ffff88800e271800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.250564] ffff88800e271880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.251432] >ffff88800e271900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.252289] ^ [ 31.253083] ffff88800e271980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.253943] ffff88800e271a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.254795] ================================================================== [ 31.255709] Disabling lock debugging due to kernel taint [ 33.503671] BUG: Bad rss-counter state mm:00000000ad2c24c1 type:MM_FILEPAGES val:33 [ 33.504616] BUG: Bad rss-counter state mm:00000000ad2c24c1 type:MM_ANONPAGES val:22 [ 34.057528] BUG: Bad rss-counter state mm:00000000e966d5d9 type:MM_FILEPAGES val:33 [ 34.058740] BUG: Bad rss-counter state mm:00000000e966d5d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40128' (ECDSA) to the list of known hosts. 2023/06/20 13:42:14 fuzzer started 2023/06/20 13:42:14 dialing manager at localhost:36067 2023/06/20 13:42:14 checking machine... 2023/06/20 13:42:14 checking revisions... [ 34.713456] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:42:14 testing simple program... [ 34.769392] cgroup: Unknown subsys name 'net' [ 34.833740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:42:14 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880158f3680 RSI=ffffffff818ea1a4 RDI=0000000000000001 RBP=0000000000000003 RSP=ffff88800db1f8c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800ca1f900 R13=ffff88800f8efc60 R14=ffff88800ca1f958 R15=0000000000000003 RIP=ffffffff814c0880 RFL=00000246 [---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 00007fe38803a700 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=00007ff7c64fce00 CR3=000000000d978000 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=772360c2c6b2df89ed4ee167c968463d XMM02=000000000011a468eff9b2d0a8fce9cb XMM03=000000000011a5382c67c8bc2e329bc3 XMM04=5cc4f4e4e84a9f5000000000000ae988 XMM05=0b0451004f3b66490000000000132960 XMM06=19e9129bd510f23500000000001317f8 XMM07=fb795ef6d65770560000000000121978 XMM08=2c67c8bc2e329bc3000000000011a4d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f897c48 RCX=0000000000000000 RDX=1ffff110027451b3 RSI=ffffffff81f73c81 RDI=ffff88800b976900 RBP=ffff888013a28d98 RSP=ffff88800f8979f0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff88800b976808 R13=0000000000000001 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f73cc8 RFL=00000246 [---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 00007f57cff10900 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=00007f57d04c5650 CR3=000000000ef4e000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000