[ 31.035543] BUG: Bad rss-counter state mm:000000008c180811 type:MM_FILEPAGES val:33 [ 31.037020] BUG: Bad rss-counter state mm:000000008c180811 type:MM_ANONPAGES val:22 [ 31.189478] ================================================================== [ 31.190398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.191447] Read of size 8 at addr ffff88801bc85c20 by task sshd/219 [ 31.192216] [ 31.192434] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.193311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.194336] Call Trace: [ 31.194679] [ 31.194975] dump_stack_lvl+0x91/0xf0 [ 31.195472] print_report+0xcc/0x620 [ 31.195964] ? __virt_addr_valid+0x102/0x340 [ 31.196525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197778] kasan_report+0xbe/0xf0 [ 31.198261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198901] vma_interval_tree_remove+0xc75/0xec0 [ 31.199515] vma_prepare+0xc54/0x11a0 [ 31.200005] __split_vma+0x5af/0x950 [ 31.200480] ? __pfx___split_vma+0x10/0x10 [ 31.201018] ? find_held_lock+0x2c/0x110 [ 31.201544] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.202118] ? lock_is_held_type+0x9f/0x120 [ 31.202690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.203307] ? mtree_range_walk+0x632/0x900 [ 31.203866] ? mas_walk+0x5c7/0x7c0 [ 31.204347] do_vmi_munmap+0x1f1/0x2b0 [ 31.204846] mmap_region+0x1f9/0x2660 [ 31.205339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.205857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.206588] ? __pfx_lock_acquire+0x10/0x10 [ 31.207137] ? __pfx_mmap_region+0x10/0x10 [ 31.207675] ? security_mmap_addr+0x7d/0xa0 [ 31.208221] ? get_unmapped_area+0x1f5/0x3f0 [ 31.208778] do_mmap+0x854/0xf00 [ 31.209223] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.209727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.210300] ksys_mmap_pgoff+0x3af/0x500 [ 31.210823] do_syscall_64+0x3f/0x90 [ 31.211314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.211973] RIP: 0033:0x7f2b2d138d82 [ 31.212437] 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 [ 31.214598] RSP: 002b:00007ffdd4f3a118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.215540] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b2d138d82 [ 31.216395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b2c572000 [ 31.217251] RBP: 00007f2b2c572000 R08: 0000000000000009 R09: 0000000000001000 [ 31.218112] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ddbe8cd90 [ 31.218988] R13: 00007ffdd4f3a130 R14: 00007ffdd4f3a160 R15: 00007ffdd4f3a4c0 [ 31.219862] [ 31.220161] [ 31.220383] Allocated by task 210: [ 31.220819] kasan_save_stack+0x22/0x50 [ 31.221325] kasan_set_track+0x25/0x30 [ 31.221825] __kasan_slab_alloc+0x59/0x70 [ 31.222357] kmem_cache_alloc+0x16b/0x370 [ 31.222889] vm_area_dup+0x20/0x160 [ 31.223346] __split_vma+0x170/0x950 [ 31.223824] split_vma+0xc6/0x110 [ 31.224270] mprotect_fixup+0x8d2/0xb30 [ 31.224780] do_mprotect_pkey+0x87e/0xd40 [ 31.225308] __x64_sys_mprotect+0x78/0xc0 [ 31.225837] do_syscall_64+0x3f/0x90 [ 31.226315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226984] [ 31.227199] Freed by task 19: [ 31.227590] kasan_save_stack+0x22/0x50 [ 31.228103] kasan_set_track+0x25/0x30 [ 31.228606] kasan_save_free_info+0x2b/0x50 [ 31.229146] __kasan_slab_free+0x10a/0x190 [ 31.229688] kmem_cache_free+0x10d/0x4d0 [ 31.230205] rcu_core+0x8c8/0x2860 [ 31.230660] __do_softirq+0x1b7/0x7d4 [ 31.231148] [ 31.231370] Last potentially related work creation: [ 31.231962] kasan_save_stack+0x22/0x50 [ 31.232471] __kasan_record_aux_stack+0x8e/0xa0 [ 31.233052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.233703] remove_vma+0x139/0x170 [ 31.234165] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.234739] do_vmi_munmap+0x1f1/0x2b0 [ 31.235230] __vm_munmap+0x138/0x3a0 [ 31.235707] __x64_sys_munmap+0x59/0x80 [ 31.236209] do_syscall_64+0x3f/0x90 [ 31.236688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237339] [ 31.237557] The buggy address belongs to the object at ffff88801bc85bc8 [ 31.237557] which belongs to the cache vm_area_struct of size 168 [ 31.239080] The buggy address is located 88 bytes inside of [ 31.239080] freed 168-byte region [ffff88801bc85bc8, ffff88801bc85c70) [ 31.240503] [ 31.240720] The buggy address belongs to the physical page: [ 31.241387] page:0000000062daebc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc85 [ 31.242490] memcg:ffff88801bc73301 [ 31.242923] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.243576] page_type: 0xffffffff() [ 31.244030] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.244965] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc73301 [ 31.245892] page dumped because: kasan: bad access detected [ 31.246558] [ 31.246800] Memory state around the buggy address: [ 31.247385] ffff88801bc85b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.248249] ffff88801bc85b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.249118] >ffff88801bc85c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.249985] ^ [ 31.250513] ffff88801bc85c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.251395] ffff88801bc85d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.252263] ================================================================== [ 31.253263] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.253720] BUG: Bad rss-counter state mm:0000000098be61ab type:MM_FILEPAGES val:33 [ 33.254947] BUG: Bad rss-counter state mm:0000000098be61ab type:MM_ANONPAGES val:22 [ 33.605308] BUG: Bad rss-counter state mm:00000000d2cac66a type:MM_FILEPAGES val:33 [ 33.606468] BUG: Bad rss-counter state mm:00000000d2cac66a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63737' (ECDSA) to the list of known hosts. 2023/06/21 07:08:01 fuzzer started 2023/06/21 07:08:01 dialing manager at localhost:36067 2023/06/21 07:08:01 checking machine... 2023/06/21 07:08:01 checking revisions... [ 34.109919] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:08:01 testing simple program... [ 34.157474] cgroup: Unknown subsys name 'net' [ 34.201562] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:08:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffd83767758 CR3=0000000016912000 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=2031303a38303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a38303a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=ffff88806cf09a90 RDX=1ffff1100d9e1353 RSI=ffff88800e6d7990 RDI=ffff88806cf09a98 RBP=ffff88800e6d7990 RSP=ffff88806cf099c8 R8 =ffffffff864b2f42 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88800e6d7998 R15=ffff88806cf09a70 RIP=ffffffff811304ae 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 00007f0583e06900 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=00007ffe2a0fc000 CR3=0000000014528000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000