syzkaller login: [ 47.725687] BUG: Bad rss-counter state mm:0000000063d5f77b type:MM_FILEPAGES val:33 [ 47.726890] BUG: Bad rss-counter state mm:0000000063d5f77b type:MM_ANONPAGES val:22 [ 47.877916] ================================================================== [ 47.878814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.879686] Read of size 8 at addr ffff888018f08968 by task sshd/220 [ 47.880404] [ 47.880618] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.881538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.882513] Call Trace: [ 47.882846] [ 47.883162] dump_stack_lvl+0x91/0xf0 [ 47.883674] print_report+0xcc/0x620 [ 47.884181] ? __virt_addr_valid+0x102/0x340 [ 47.884762] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.885402] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.886053] kasan_report+0xbe/0xf0 [ 47.886536] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.887172] vma_interval_tree_remove+0xc75/0xec0 [ 47.887773] vma_prepare+0xc54/0x11a0 [ 47.888255] __split_vma+0x5af/0x950 [ 47.888732] ? __pfx___split_vma+0x10/0x10 [ 47.889258] ? find_held_lock+0x2c/0x110 [ 47.889786] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.890368] ? lock_is_held_type+0x9f/0x120 [ 47.890913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.891529] ? mtree_range_walk+0x632/0x900 [ 47.892098] ? mas_walk+0x5c7/0x7c0 [ 47.892585] do_vmi_munmap+0x1f1/0x2b0 [ 47.893094] mmap_region+0x1f9/0x2660 [ 47.893586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.894113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.894837] ? __pfx_lock_acquire+0x10/0x10 [ 47.895377] ? __pfx_mmap_region+0x10/0x10 [ 47.895928] ? security_mmap_addr+0x7d/0xa0 [ 47.896476] ? get_unmapped_area+0x1f5/0x3f0 [ 47.897058] do_mmap+0x854/0xf00 [ 47.897509] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.898039] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.898624] ksys_mmap_pgoff+0x3af/0x500 [ 47.899144] do_syscall_64+0x3f/0x90 [ 47.899643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.900320] RIP: 0033:0x7f6f64899d82 [ 47.900790] 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 [ 47.903041] RSP: 002b:00007ffc2c9d68c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.903972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f64899d82 [ 47.904839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f63cd3000 [ 47.905718] RBP: 00007f6f63cd3000 R08: 0000000000000009 R09: 0000000000001000 [ 47.906617] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c70b2bec0 [ 47.907489] R13: 00007ffc2c9d68e0 R14: 00007ffc2c9d6910 R15: 00007ffc2c9d6c70 [ 47.908348] [ 47.908642] [ 47.908858] Allocated by task 213: [ 47.909285] kasan_save_stack+0x22/0x50 [ 47.909789] kasan_set_track+0x25/0x30 [ 47.910308] __kasan_slab_alloc+0x59/0x70 [ 47.910847] kmem_cache_alloc+0x16b/0x370 [ 47.911385] vm_area_dup+0x20/0x160 [ 47.911868] __split_vma+0x170/0x950 [ 47.912369] split_vma+0xc6/0x110 [ 47.912798] mprotect_fixup+0x8d2/0xb30 [ 47.913271] do_mprotect_pkey+0x87e/0xd40 [ 47.913764] __x64_sys_mprotect+0x78/0xc0 [ 47.914274] do_syscall_64+0x3f/0x90 [ 47.914734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.915389] [ 47.915618] Freed by task 203: [ 47.916030] kasan_save_stack+0x22/0x50 [ 47.916534] kasan_set_track+0x25/0x30 [ 47.917044] kasan_save_free_info+0x2b/0x50 [ 47.917593] __kasan_slab_free+0x10a/0x190 [ 47.918143] kmem_cache_free+0x10d/0x4d0 [ 47.918649] rcu_core+0x8c8/0x2860 [ 47.919097] __do_softirq+0x1b7/0x7d4 [ 47.919579] [ 47.919794] Last potentially related work creation: [ 47.920380] kasan_save_stack+0x22/0x50 [ 47.920885] __kasan_record_aux_stack+0x8e/0xa0 [ 47.921462] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.922115] remove_vma+0x139/0x170 [ 47.922577] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.923138] do_vmi_munmap+0x1f1/0x2b0 [ 47.923636] __vm_munmap+0x138/0x3a0 [ 47.924110] __x64_sys_munmap+0x59/0x80 [ 47.924614] do_syscall_64+0x3f/0x90 [ 47.925091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.925745] [ 47.925979] The buggy address belongs to the object at ffff888018f08910 [ 47.925979] which belongs to the cache vm_area_struct of size 168 [ 47.927453] The buggy address is located 88 bytes inside of [ 47.927453] freed 168-byte region [ffff888018f08910, ffff888018f089b8) [ 47.928864] [ 47.929081] The buggy address belongs to the physical page: [ 47.929739] page:00000000f4f601d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f08 [ 47.930848] memcg:ffff8880097f7a01 [ 47.931274] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.931930] page_type: 0xffffffff() [ 47.932379] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.933305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097f7a01 [ 47.934242] page dumped because: kasan: bad access detected [ 47.934909] [ 47.935127] Memory state around the buggy address: [ 47.935710] ffff888018f08800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 47.936561] ffff888018f08880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 47.937413] >ffff888018f08900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.938280] ^ [ 47.939061] ffff888018f08980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 47.939914] ffff888018f08a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.940772] ================================================================== [ 47.942210] Disabling lock debugging due to kernel taint [ 49.802908] BUG: Bad rss-counter state mm:0000000007fe8173 type:MM_FILEPAGES val:33 [ 49.803889] BUG: Bad rss-counter state mm:0000000007fe8173 type:MM_ANONPAGES val:22 [ 50.261594] BUG: Bad rss-counter state mm:00000000e63226bb type:MM_FILEPAGES val:33 [ 50.262600] BUG: Bad rss-counter state mm:00000000e63226bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32681' (ECDSA) to the list of known hosts. 2023/06/20 01:42:43 fuzzer started 2023/06/20 01:42:43 dialing manager at localhost:44161 2023/06/20 01:42:43 checking machine... 2023/06/20 01:42:43 checking revisions... [ 51.013359] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:42:44 testing simple program... [ 51.063885] cgroup: Unknown subsys name 'net' [ 51.123335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:42:26 Registers: info registers vcpu 0 RAX=ffffffff861472c9 RBX=0000000000000001 RCX=ffffffff861472c4 RDX=0000000000000000 RSI=1ffffffff0c28e59 RDI=ffffffff85e07324 RBP=ffff888014517320 RSP=ffff888014517258 R8 =ffffffff861472c4 R9 =ffff888014517308 R10=0000000000038001 R11=00000000000237d4 R12=ffff888014517328 R13=ffff888014517310 R14=ffff888014517309 R15=ffff8880145172c8 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 00007f5efe786900 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=00007f5efdb9e140 CR3=000000000c4e4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8f1178c94a001a3000000000000ae988 XMM05=07d5b558c3d73d4f0000000000135208 XMM06=319280815dd63ea400000000001342b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e57998 RCX=ffff888008e579a0 RDX=1ffff110011caf20 RSI=ffff888008e578d0 RDI=ffff888008e57900 RBP=dffffc0000000000 RSP=ffff888008e57888 R8 =0000000000000001 R9 =ffff888008e57940 R10=0000000000038001 R11=0000000000006097 R12=ffffed10011caf22 R13=ffffed10011caf21 R14=ffff888008e57948 R15=ffff888008e57900 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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=00007ffe74085ff8 CR3=0000000017eba000 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=32343a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323431 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000