syzkaller login: [ 30.528241] BUG: Bad rss-counter state mm:0000000024dd1e0a type:MM_FILEPAGES val:33 [ 30.529466] BUG: Bad rss-counter state mm:0000000024dd1e0a type:MM_ANONPAGES val:22 [ 30.676961] ================================================================== [ 30.677879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.678855] Read of size 8 at addr ffff88800e1944e0 by task sshd/221 [ 30.679715] [ 30.679935] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.680829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.681890] Call Trace: [ 30.682224] [ 30.682512] dump_stack_lvl+0x91/0xf0 [ 30.683027] print_report+0xcc/0x620 [ 30.683529] ? __virt_addr_valid+0x102/0x340 [ 30.684087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684727] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685347] kasan_report+0xbe/0xf0 [ 30.685828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686449] vma_interval_tree_remove+0xc75/0xec0 [ 30.687062] vma_prepare+0xc54/0x11a0 [ 30.687567] __split_vma+0x5af/0x950 [ 30.688054] ? __pfx___split_vma+0x10/0x10 [ 30.688595] ? find_held_lock+0x2c/0x110 [ 30.689144] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.689725] ? lock_is_held_type+0x9f/0x120 [ 30.690271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.690919] ? mtree_range_walk+0x632/0x900 [ 30.691498] ? mas_walk+0x5c7/0x7c0 [ 30.691993] do_vmi_munmap+0x1f1/0x2b0 [ 30.692508] mmap_region+0x1f9/0x2660 [ 30.693022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.693551] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.694273] ? __pfx_lock_acquire+0x10/0x10 [ 30.694817] ? __pfx_mmap_region+0x10/0x10 [ 30.695372] ? security_mmap_addr+0x7d/0xa0 [ 30.695919] ? get_unmapped_area+0x1f5/0x3f0 [ 30.696471] do_mmap+0x854/0xf00 [ 30.696909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.697442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.698035] ksys_mmap_pgoff+0x3af/0x500 [ 30.698543] do_syscall_64+0x3f/0x90 [ 30.699031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699700] RIP: 0033:0x7f5ad3625d82 [ 30.700169] 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 [ 30.702291] RSP: 002b:00007ffd476c3d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.703198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ad3625d82 [ 30.704057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ad2a5f000 [ 30.704915] RBP: 00007f5ad2a5f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.705768] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb8f936ec0 [ 30.706606] R13: 00007ffd476c3d70 R14: 00007ffd476c3da0 R15: 00007ffd476c4100 [ 30.707471] [ 30.707759] [ 30.707981] Allocated by task 214: [ 30.708405] kasan_save_stack+0x22/0x50 [ 30.708906] kasan_set_track+0x25/0x30 [ 30.709397] __kasan_slab_alloc+0x59/0x70 [ 30.709927] kmem_cache_alloc+0x16b/0x370 [ 30.710436] vm_area_dup+0x20/0x160 [ 30.710892] __split_vma+0x170/0x950 [ 30.711398] split_vma+0xc6/0x110 [ 30.711842] mprotect_fixup+0x8d2/0xb30 [ 30.712354] do_mprotect_pkey+0x87e/0xd40 [ 30.712901] __x64_sys_mprotect+0x78/0xc0 [ 30.713419] do_syscall_64+0x3f/0x90 [ 30.713887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.714526] [ 30.714739] Freed by task 214: [ 30.715126] kasan_save_stack+0x22/0x50 [ 30.715633] kasan_set_track+0x25/0x30 [ 30.716126] kasan_save_free_info+0x2b/0x50 [ 30.716655] __kasan_slab_free+0x10a/0x190 [ 30.717181] kmem_cache_free+0x10d/0x4d0 [ 30.717692] rcu_core+0x8c8/0x2860 [ 30.718130] __do_softirq+0x1b7/0x7d4 [ 30.718606] [ 30.718819] Last potentially related work creation: [ 30.719423] kasan_save_stack+0x22/0x50 [ 30.719924] __kasan_record_aux_stack+0x8e/0xa0 [ 30.720487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.721125] remove_vma+0x139/0x170 [ 30.721571] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.722128] do_vmi_munmap+0x1f1/0x2b0 [ 30.722612] __vm_munmap+0x138/0x3a0 [ 30.723075] __x64_sys_munmap+0x59/0x80 [ 30.723580] do_syscall_64+0x3f/0x90 [ 30.724048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.724684] [ 30.724896] Second to last potentially related work creation: [ 30.725583] kasan_save_stack+0x22/0x50 [ 30.726084] __kasan_record_aux_stack+0x8e/0xa0 [ 30.726649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.727284] remove_vma+0x139/0x170 [ 30.727757] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.728308] do_vmi_munmap+0x1f1/0x2b0 [ 30.728787] mmap_region+0x1f9/0x2660 [ 30.729263] do_mmap+0x854/0xf00 [ 30.729688] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.730173] ksys_mmap_pgoff+0x3af/0x500 [ 30.730670] do_syscall_64+0x3f/0x90 [ 30.731143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731785] [ 30.732002] The buggy address belongs to the object at ffff88800e194488 [ 30.732002] which belongs to the cache vm_area_struct of size 168 [ 30.733461] The buggy address is located 88 bytes inside of [ 30.733461] freed 168-byte region [ffff88800e194488, ffff88800e194530) [ 30.734847] [ 30.735064] The buggy address belongs to the physical page: [ 30.735734] page:00000000be459a70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe194 [ 30.736806] memcg:ffff88800e5c2401 [ 30.737231] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.737876] page_type: 0xffffffff() [ 30.738331] raw: 0100000000000200 ffff8880087a0c80 ffffea0000399680 dead000000000008 [ 30.739238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5c2401 [ 30.740160] page dumped because: kasan: bad access detected [ 30.740811] [ 30.741023] Memory state around the buggy address: [ 30.741604] ffff88800e194380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.742462] ffff88800e194400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.743316] >ffff88800e194480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.744164] ^ [ 30.744909] ffff88800e194500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.745765] ffff88800e194580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.746614] ================================================================== [ 30.747612] Disabling lock debugging due to kernel taint [ 32.560961] BUG: Bad rss-counter state mm:00000000a7b5e82f type:MM_FILEPAGES val:33 [ 32.562116] BUG: Bad rss-counter state mm:00000000a7b5e82f type:MM_ANONPAGES val:22 [ 33.017150] BUG: Bad rss-counter state mm:00000000b3886e02 type:MM_FILEPAGES val:33 [ 33.018935] BUG: Bad rss-counter state mm:00000000b3886e02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56638' (ECDSA) to the list of known hosts. 2023/06/21 05:31:17 fuzzer started 2023/06/21 05:31:17 dialing manager at localhost:36067 2023/06/21 05:31:17 checking machine... 2023/06/21 05:31:17 checking revisions... [ 33.798098] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:31:18 testing simple program... [ 33.851111] cgroup: Unknown subsys name 'net' [ 33.897785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:17 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888010217808 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0030733a745f6c65 R12=0000000000000283 R13=ffffffff856d85c0 R14=ffffffff81eeadb0 R15=1ffff11002042f1d RIP=ffffffff8180f184 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 00007f548a7d4700 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=00007f7fdf898830 CR3=000000000b842000 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=3a5d3033325b646873732037313a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343435 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=0000000000000001 RBX=ffff888008d951c0 RCX=ffffffff8123b1e9 RDX=ffffed10011b2a39 RSI=0000000000000008 RDI=ffff888008d951c0 RBP=0000000000000001 RSP=ffff88806cf09dc8 R8 =0000000000000001 R9 =ffffed10011b2a38 R10=ffff888008d951c7 R11=0000000000000000 R12=1ffff1100d9e13b9 R13=ffff88806cf39ed8 R14=ffffffff852bfeb0 R15=ffff88806cf39500 RIP=ffffffff8123b1ed RFL=00000002 [-------] 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=00007ffe33fa9aa8 CR3=0000000005482000 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=00007fafe0f4d5100000562d17c19790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000