syzkaller login: [ 36.224533] BUG: Bad rss-counter state mm:0000000016587ae2 type:MM_FILEPAGES val:33 [ 36.225620] BUG: Bad rss-counter state mm:0000000016587ae2 type:MM_ANONPAGES val:22 [ 36.392672] ================================================================== [ 36.393602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.394573] Read of size 8 at addr ffff88800c5b15c8 by task sshd/219 [ 36.395364] [ 36.395585] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.396592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.397612] Call Trace: [ 36.397937] [ 36.398226] dump_stack_lvl+0x91/0xf0 [ 36.398725] print_report+0xcc/0x620 [ 36.399219] ? __virt_addr_valid+0x102/0x340 [ 36.399775] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.400395] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.401052] kasan_report+0xbe/0xf0 [ 36.401533] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.402164] vma_interval_tree_remove+0xc75/0xec0 [ 36.402771] vma_prepare+0xc54/0x11a0 [ 36.403265] __split_vma+0x5af/0x950 [ 36.403752] ? __pfx___split_vma+0x10/0x10 [ 36.404290] ? find_held_lock+0x2c/0x110 [ 36.404838] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.405423] ? lock_is_held_type+0x9f/0x120 [ 36.405982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.406609] ? mtree_range_walk+0x632/0x900 [ 36.407169] ? mas_walk+0x5c7/0x7c0 [ 36.407654] do_vmi_munmap+0x1f1/0x2b0 [ 36.408164] mmap_region+0x1f9/0x2660 [ 36.408659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.409188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.409925] ? __pfx_lock_acquire+0x10/0x10 [ 36.410465] ? __pfx_mmap_region+0x10/0x10 [ 36.411008] ? security_mmap_addr+0x7d/0xa0 [ 36.411561] ? get_unmapped_area+0x1f5/0x3f0 [ 36.412118] do_mmap+0x854/0xf00 [ 36.412564] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.413087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.413654] ksys_mmap_pgoff+0x3af/0x500 [ 36.414174] do_syscall_64+0x3f/0x90 [ 36.414661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.415322] RIP: 0033:0x7f6ba3798d82 [ 36.415792] 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 [ 36.417962] RSP: 002b:00007fff301f3ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.418883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ba3798d82 [ 36.419744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ba2bd2000 [ 36.420598] RBP: 00007f6ba2bd2000 R08: 0000000000000009 R09: 0000000000001000 [ 36.421443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abecd45f70 [ 36.422254] R13: 00007fff301f3d00 R14: 00007fff301f3d30 R15: 00007fff301f4090 [ 36.423080] [ 36.423362] [ 36.423573] Allocated by task 212: [ 36.423981] kasan_save_stack+0x22/0x50 [ 36.424474] kasan_set_track+0x25/0x30 [ 36.424968] __kasan_slab_alloc+0x59/0x70 [ 36.425475] kmem_cache_alloc+0x16b/0x370 [ 36.425972] vm_area_dup+0x20/0x160 [ 36.426413] __split_vma+0x170/0x950 [ 36.426867] split_vma+0xc6/0x110 [ 36.427285] mprotect_fixup+0x8d2/0xb30 [ 36.427774] do_mprotect_pkey+0x87e/0xd40 [ 36.428281] __x64_sys_mprotect+0x78/0xc0 [ 36.428800] do_syscall_64+0x3f/0x90 [ 36.429268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.429891] [ 36.430101] Freed by task 212: [ 36.430480] kasan_save_stack+0x22/0x50 [ 36.430967] kasan_set_track+0x25/0x30 [ 36.431442] kasan_save_free_info+0x2b/0x50 [ 36.431950] __kasan_slab_free+0x10a/0x190 [ 36.432458] kmem_cache_free+0x10d/0x4d0 [ 36.432960] rcu_core+0x8c8/0x2860 [ 36.433391] __do_softirq+0x1b7/0x7d4 [ 36.433853] [ 36.434060] Last potentially related work creation: [ 36.434630] kasan_save_stack+0x22/0x50 [ 36.435117] __kasan_record_aux_stack+0x8e/0xa0 [ 36.435674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.436296] remove_vma+0x139/0x170 [ 36.436737] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.437288] do_vmi_munmap+0x1f1/0x2b0 [ 36.437756] __vm_munmap+0x138/0x3a0 [ 36.438209] __x64_sys_munmap+0x59/0x80 [ 36.438694] do_syscall_64+0x3f/0x90 [ 36.439161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.439785] [ 36.439993] The buggy address belongs to the object at ffff88800c5b1570 [ 36.439993] which belongs to the cache vm_area_struct of size 168 [ 36.441439] The buggy address is located 88 bytes inside of [ 36.441439] freed 168-byte region [ffff88800c5b1570, ffff88800c5b1618) [ 36.442801] [ 36.443007] The buggy address belongs to the physical page: [ 36.443658] page:00000000fa290fa3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5b1 [ 36.444708] memcg:ffff88800e242201 [ 36.445122] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.445798] page_type: 0xffffffff() [ 36.446232] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396680 dead000000000007 [ 36.447120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e242201 [ 36.447981] page dumped because: kasan: bad access detected [ 36.448613] [ 36.448833] Memory state around the buggy address: [ 36.449386] ffff88800c5b1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.450206] ffff88800c5b1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.451023] >ffff88800c5b1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.451837] ^ [ 36.452474] ffff88800c5b1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.453298] ffff88800c5b1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.454116] ================================================================== [ 36.455071] Disabling lock debugging due to kernel taint [ 38.582797] BUG: Bad rss-counter state mm:00000000f0084171 type:MM_FILEPAGES val:33 [ 38.583986] BUG: Bad rss-counter state mm:00000000f0084171 type:MM_ANONPAGES val:22 [ 39.032801] BUG: Bad rss-counter state mm:00000000c186ef67 type:MM_FILEPAGES val:33 [ 39.033914] BUG: Bad rss-counter state mm:00000000c186ef67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28645' (ECDSA) to the list of known hosts. 2023/06/21 00:13:57 fuzzer started 2023/06/21 00:13:57 dialing manager at localhost:36067 2023/06/21 00:13:57 checking machine... 2023/06/21 00:13:57 checking revisions... [ 39.807286] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:13:58 testing simple program... [ 39.869034] cgroup: Unknown subsys name 'net' [ 39.933781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001fdef39 RCX=0000000000000000 RDX=ffff888015d91b40 RSI=ffffffff81f0fc6f RDI=ffff888016919800 RBP=ffff888016919800 RSP=ffff88800fef79b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000001fa0 R14=ffff88800fef7e60 R15=ffff88800885d640 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 00007f495c822700 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=00007fbf1faf90b0 CR3=000000000ecca000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732037353a3331 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303738 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fc3a010 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09d58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=00000000000361a0 R14=0000000000000001 R15=ffff88800fc3a000 RIP=ffffffff81827b52 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=00007f1cae5c58f0 CR3=000000000d5a4000 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=cf01d5d18fea2fb9db4a07dacae0ddda XMM02=000000000011c068ec2efd57dc4c00df XMM03=00000000001222707d391f1208fedcf9 XMM04=cf37ac2e2b613dc000000000000ae988 XMM05=5fb5f5884265c0cf0000000000132bb8 XMM06=806171799158d9670000000000131c70 XMM07=e042d86d42eb936e0000000000122548 XMM08=7d391f1208fedcf9000000000011c0c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000