syzkaller login: [ 31.184109] BUG: Bad rss-counter state mm:000000008a642c84 type:MM_FILEPAGES val:33 [ 31.185144] BUG: Bad rss-counter state mm:000000008a642c84 type:MM_ANONPAGES val:22 [ 31.347103] ================================================================== [ 31.348005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.348940] Read of size 8 at addr ffff88800d833b38 by task sshd/219 [ 31.349714] [ 31.350028] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.350936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.351951] Call Trace: [ 31.352269] [ 31.352557] dump_stack_lvl+0x91/0xf0 [ 31.353057] print_report+0xcc/0x620 [ 31.353540] ? __virt_addr_valid+0x102/0x340 [ 31.354096] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354720] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355342] kasan_report+0xbe/0xf0 [ 31.355823] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356440] vma_interval_tree_remove+0xc75/0xec0 [ 31.357048] vma_prepare+0xc54/0x11a0 [ 31.357526] __split_vma+0x5af/0x950 [ 31.358005] ? __pfx___split_vma+0x10/0x10 [ 31.358533] ? find_held_lock+0x2c/0x110 [ 31.359071] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.359638] ? lock_is_held_type+0x9f/0x120 [ 31.360177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.360783] ? mtree_range_walk+0x632/0x900 [ 31.361337] ? mas_walk+0x5c7/0x7c0 [ 31.361818] do_vmi_munmap+0x1f1/0x2b0 [ 31.362308] mmap_region+0x1f9/0x2660 [ 31.362812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.363322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.364035] ? __pfx_lock_acquire+0x10/0x10 [ 31.364567] ? __pfx_mmap_region+0x10/0x10 [ 31.365103] ? security_mmap_addr+0x7d/0xa0 [ 31.365629] ? get_unmapped_area+0x1f5/0x3f0 [ 31.366184] do_mmap+0x854/0xf00 [ 31.366619] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.367120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.367683] ksys_mmap_pgoff+0x3af/0x500 [ 31.368191] do_syscall_64+0x3f/0x90 [ 31.368670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369322] RIP: 0033:0x7fa1f21afd82 [ 31.369782] 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 [ 31.371939] RSP: 002b:00007ffeedd4e548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1f21afd82 [ 31.373713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1f15e9000 [ 31.374554] RBP: 00007fa1f15e9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.375418] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c95d30980 [ 31.376265] R13: 00007ffeedd4e560 R14: 00007ffeedd4e590 R15: 00007ffeedd4e8f0 [ 31.377132] [ 31.377427] [ 31.377644] Allocated by task 212: [ 31.378077] kasan_save_stack+0x22/0x50 [ 31.378585] kasan_set_track+0x25/0x30 [ 31.379094] __kasan_slab_alloc+0x59/0x70 [ 31.379620] kmem_cache_alloc+0x16b/0x370 [ 31.380142] vm_area_dup+0x20/0x160 [ 31.380594] __split_vma+0x170/0x950 [ 31.381062] split_vma+0xc6/0x110 [ 31.381506] mprotect_fixup+0x8d2/0xb30 [ 31.382013] do_mprotect_pkey+0x87e/0xd40 [ 31.382534] __x64_sys_mprotect+0x78/0xc0 [ 31.383076] do_syscall_64+0x3f/0x90 [ 31.383555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384197] [ 31.384418] Freed by task 212: [ 31.384814] kasan_save_stack+0x22/0x50 [ 31.385317] kasan_set_track+0x25/0x30 [ 31.385809] kasan_save_free_info+0x2b/0x50 [ 31.386343] __kasan_slab_free+0x10a/0x190 [ 31.386879] kmem_cache_free+0x10d/0x4d0 [ 31.387389] rcu_core+0x8c8/0x2860 [ 31.387836] __do_softirq+0x1b7/0x7d4 [ 31.388320] [ 31.388537] Last potentially related work creation: [ 31.389127] kasan_save_stack+0x22/0x50 [ 31.389636] __kasan_record_aux_stack+0x8e/0xa0 [ 31.390212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.390872] remove_vma+0x139/0x170 [ 31.391334] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.391899] do_vmi_munmap+0x1f1/0x2b0 [ 31.392389] __vm_munmap+0x138/0x3a0 [ 31.392865] __x64_sys_munmap+0x59/0x80 [ 31.393363] do_syscall_64+0x3f/0x90 [ 31.393841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394484] [ 31.394720] The buggy address belongs to the object at ffff88800d833ae0 [ 31.394720] which belongs to the cache vm_area_struct of size 168 [ 31.396195] The buggy address is located 88 bytes inside of [ 31.396195] freed 168-byte region [ffff88800d833ae0, ffff88800d833b88) [ 31.397594] [ 31.397811] The buggy address belongs to the physical page: [ 31.398482] page:0000000087ff949f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd833 [ 31.399564] memcg:ffff88800b9dff01 [ 31.399992] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.400658] page_type: 0xffffffff() [ 31.401120] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.402056] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b9dff01 [ 31.403008] page dumped because: kasan: bad access detected [ 31.403683] [ 31.403896] Memory state around the buggy address: [ 31.404486] ffff88800d833a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.405355] ffff88800d833a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.406227] >ffff88800d833b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.407096] ^ [ 31.407715] ffff88800d833b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.408568] ffff88800d833c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.409432] ================================================================== [ 31.410407] Disabling lock debugging due to kernel taint [ 33.167821] BUG: Bad rss-counter state mm:000000006d99f94b type:MM_FILEPAGES val:33 [ 33.168555] BUG: Bad rss-counter state mm:000000006d99f94b type:MM_ANONPAGES val:22 [ 33.640754] BUG: Bad rss-counter state mm:00000000d96ed055 type:MM_FILEPAGES val:33 [ 33.641988] BUG: Bad rss-counter state mm:00000000d96ed055 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48244' (ECDSA) to the list of known hosts. 2023/06/20 13:30:46 fuzzer started 2023/06/20 13:30:47 dialing manager at localhost:36067 2023/06/20 13:30:47 checking machine... 2023/06/20 13:30:47 checking revisions... [ 34.364353] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:30:47 testing simple program... [ 34.426205] cgroup: Unknown subsys name 'net' [ 34.485351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:46 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81afa8fc RDX=000000000000afa8 RSI=000000000000afa8 RDI=ffffffff86515890 RBP=ffff888013f3f5d0 RSP=ffff888013f3f508 R8 =0000000000000000 R9 =ffff888013f3f5b8 R10=0000000000038001 R11=000000000002bf96 R12=ffff888013f3f5d8 R13=ffff888013f3f5c0 R14=ffff888013f3f5b9 R15=ffff888013f3f578 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 00007f4261b75700 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=00007f9092d31390 CR3=00000000186d0000 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=2036343a30333a3331203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a343133303520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30333a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff88801a328850 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801a328854 RBP=1ffff1100d9e139b RSP=ffff88806cf09cd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000202 R13=ffff88801a328890 R14=ffffffff82196cf2 R15=0000000000000000 RIP=ffffffff812e009a 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=00007f20c628d618 CR3=00000000186d0000 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=30333a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000