syzkaller login: [ 31.469029] BUG: Bad rss-counter state mm:0000000028714800 type:MM_FILEPAGES val:33 [ 31.470560] BUG: Bad rss-counter state mm:0000000028714800 type:MM_ANONPAGES val:22 [ 31.628498] ================================================================== [ 31.629404] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.630358] Read of size 8 at addr ffff88801817e880 by task sshd/221 [ 31.631240] [ 31.631477] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.632346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.633344] Call Trace: [ 31.633695] [ 31.633995] dump_stack_lvl+0x91/0xf0 [ 31.634496] print_report+0xcc/0x620 [ 31.634984] ? __virt_addr_valid+0x102/0x340 [ 31.635549] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.636173] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.636802] kasan_report+0xbe/0xf0 [ 31.637288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.637915] vma_interval_tree_remove+0xc75/0xec0 [ 31.638529] vma_prepare+0xc54/0x11a0 [ 31.639018] __split_vma+0x5af/0x950 [ 31.639515] ? __pfx___split_vma+0x10/0x10 [ 31.640051] ? find_held_lock+0x2c/0x110 [ 31.640580] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.641161] ? lock_is_held_type+0x9f/0x120 [ 31.641708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.642324] ? mtree_range_walk+0x632/0x900 [ 31.642882] ? mas_walk+0x5c7/0x7c0 [ 31.643374] do_vmi_munmap+0x1f1/0x2b0 [ 31.643879] mmap_region+0x1f9/0x2660 [ 31.644373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.644902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.645625] ? __pfx_lock_acquire+0x10/0x10 [ 31.646158] ? __pfx_mmap_region+0x10/0x10 [ 31.646698] ? security_mmap_addr+0x7d/0xa0 [ 31.647255] ? get_unmapped_area+0x1f5/0x3f0 [ 31.647807] do_mmap+0x854/0xf00 [ 31.648254] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.648752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.649326] ksys_mmap_pgoff+0x3af/0x500 [ 31.649843] do_syscall_64+0x3f/0x90 [ 31.650329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.650993] RIP: 0033:0x7f2120cc8d82 [ 31.651461] 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 [ 31.653593] RSP: 002b:00007ffc90926048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.654508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2120cc8d82 [ 31.655367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2120102000 [ 31.656227] RBP: 00007f2120102000 R08: 0000000000000009 R09: 0000000000001000 [ 31.657078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7f9726ec0 [ 31.657928] R13: 00007ffc90926060 R14: 00007ffc90926090 R15: 00007ffc909263f0 [ 31.658782] [ 31.659073] [ 31.659310] Allocated by task 214: [ 31.659739] kasan_save_stack+0x22/0x50 [ 31.660243] kasan_set_track+0x25/0x30 [ 31.660734] __kasan_slab_alloc+0x59/0x70 [ 31.661264] kmem_cache_alloc+0x16b/0x370 [ 31.661788] vm_area_dup+0x20/0x160 [ 31.662242] __split_vma+0x170/0x950 [ 31.662706] split_vma+0xc6/0x110 [ 31.663143] mprotect_fixup+0x8d2/0xb30 [ 31.663654] do_mprotect_pkey+0x87e/0xd40 [ 31.664181] __x64_sys_mprotect+0x78/0xc0 [ 31.664701] do_syscall_64+0x3f/0x90 [ 31.665178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.665821] [ 31.666037] Freed by task 214: [ 31.666431] kasan_save_stack+0x22/0x50 [ 31.666932] kasan_set_track+0x25/0x30 [ 31.667441] kasan_save_free_info+0x2b/0x50 [ 31.667974] __kasan_slab_free+0x10a/0x190 [ 31.668508] kmem_cache_free+0x10d/0x4d0 [ 31.669016] rcu_core+0x8c8/0x2860 [ 31.669556] __do_softirq+0x1b7/0x7d4 [ 31.670031] [ 31.670245] Last potentially related work creation: [ 31.670819] kasan_save_stack+0x22/0x50 [ 31.671341] __kasan_record_aux_stack+0x8e/0xa0 [ 31.671903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.672605] remove_vma+0x139/0x170 [ 31.673050] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.673599] do_vmi_munmap+0x1f1/0x2b0 [ 31.674084] __vm_munmap+0x138/0x3a0 [ 31.674545] __x64_sys_munmap+0x59/0x80 [ 31.675036] do_syscall_64+0x3f/0x90 [ 31.675515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676157] [ 31.676370] The buggy address belongs to the object at ffff88801817e828 [ 31.676370] which belongs to the cache vm_area_struct of size 168 [ 31.677835] The buggy address is located 88 bytes inside of [ 31.677835] freed 168-byte region [ffff88801817e828, ffff88801817e8d0) [ 31.679226] [ 31.679438] The buggy address belongs to the physical page: [ 31.680083] page:00000000d6396bb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1817e [ 31.681145] memcg:ffff88800ed33c01 [ 31.681565] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.682198] page_type: 0xffffffff() [ 31.682635] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.683562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed33c01 [ 31.684439] page dumped because: kasan: bad access detected [ 31.685092] [ 31.685306] Memory state around the buggy address: [ 31.685876] ffff88801817e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.686717] ffff88801817e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.687568] >ffff88801817e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.688413] ^ [ 31.688820] ffff88801817e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.689664] ffff88801817e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.690510] ================================================================== [ 31.691417] Disabling lock debugging due to kernel taint [ 34.255564] BUG: Bad rss-counter state mm:0000000007d6a0ae type:MM_FILEPAGES val:33 [ 34.256650] BUG: Bad rss-counter state mm:0000000007d6a0ae type:MM_ANONPAGES val:22 [ 34.816691] BUG: Bad rss-counter state mm:0000000012ff77ff type:MM_FILEPAGES val:33 [ 34.817885] BUG: Bad rss-counter state mm:0000000012ff77ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19151' (ECDSA) to the list of known hosts. 2023/06/20 21:59:01 fuzzer started 2023/06/20 21:59:01 dialing manager at localhost:36067 2023/06/20 21:59:01 checking machine... 2023/06/20 21:59:01 checking revisions... [ 35.471353] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:01 testing simple program... [ 35.521368] cgroup: Unknown subsys name 'net' [ 35.557888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=ffffffff86126f0a RDX=1ffff1100d9c1353 RSI=ffff888014697e70 RDI=ffff88806ce09a98 RBP=ffff888014697e70 RSP=ffff88806ce099f0 R8 =ffffffff86126f0e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001ddab R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff888014697e78 R15=ffff88806ce09a98 RIP=ffffffff8113041a RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6f43fc1900 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=00007f6f433c91b0 CR3=000000000d908000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aa9800d46ae9399200000000000ae988 XMM05=6552ae8e82ff25690000000000132698 XMM06=e4cb8bb95a7664b600000000001317e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81809a90 RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff888008e379a8 RSP=ffff888008e378e0 R8 =0000000000000000 R9 =ffff888008e37990 R10=0000000000038001 R11=000000000000fc0c R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37991 R15=ffff888008e37950 RIP=ffffffff8113078b 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 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=00007f5d71885618 CR3=000000000edf2000 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=39353a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000