syzkaller login: [ 36.778784] BUG: Bad rss-counter state mm:000000005f7b9703 type:MM_FILEPAGES val:33 [ 36.780055] BUG: Bad rss-counter state mm:000000005f7b9703 type:MM_ANONPAGES val:22 [ 36.933079] ================================================================== [ 36.934187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.935334] Read of size 8 at addr ffff88800e2ed6b0 by task sshd/220 [ 36.936310] [ 36.936523] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.937366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.938337] Call Trace: [ 36.938662] [ 36.939019] dump_stack_lvl+0x91/0xf0 [ 36.939632] print_report+0xcc/0x620 [ 36.940241] ? __virt_addr_valid+0x102/0x340 [ 36.940935] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.941711] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.942489] kasan_report+0xbe/0xf0 [ 36.943105] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.943881] vma_interval_tree_remove+0xc75/0xec0 [ 36.944628] vma_prepare+0xc54/0x11a0 [ 36.945189] __split_vma+0x5af/0x950 [ 36.945695] ? __pfx___split_vma+0x10/0x10 [ 36.946223] ? find_held_lock+0x2c/0x110 [ 36.946776] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.947354] ? lock_is_held_type+0x9f/0x120 [ 36.947888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.948477] ? mtree_range_walk+0x632/0x900 [ 36.949033] ? mas_walk+0x5c7/0x7c0 [ 36.949501] do_vmi_munmap+0x1f1/0x2b0 [ 36.950010] mmap_region+0x1f9/0x2660 [ 36.950489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.951020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.951725] ? __pfx_lock_acquire+0x10/0x10 [ 36.952242] ? __pfx_mmap_region+0x10/0x10 [ 36.952775] ? security_mmap_addr+0x7d/0xa0 [ 36.953296] ? get_unmapped_area+0x1f5/0x3f0 [ 36.953863] do_mmap+0x854/0xf00 [ 36.954308] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.954822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.955376] ksys_mmap_pgoff+0x3af/0x500 [ 36.955896] do_syscall_64+0x3f/0x90 [ 36.956368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.957022] RIP: 0033:0x7f2d97052d82 [ 36.957479] 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 [ 36.959661] RSP: 002b:00007fffbef38868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.960534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d97052d82 [ 36.961381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d9648c000 [ 36.962214] RBP: 00007f2d9648c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.963067] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561631e64ec0 [ 36.963921] R13: 00007fffbef38880 R14: 00007fffbef388b0 R15: 00007fffbef38c10 [ 36.964764] [ 36.965061] [ 36.965279] Allocated by task 213: [ 36.965720] kasan_save_stack+0x22/0x50 [ 36.966226] kasan_set_track+0x25/0x30 [ 36.966758] __kasan_slab_alloc+0x59/0x70 [ 36.967289] kmem_cache_alloc+0x16b/0x370 [ 36.967823] vm_area_dup+0x20/0x160 [ 36.968276] __split_vma+0x170/0x950 [ 36.968758] split_vma+0xc6/0x110 [ 36.969203] mprotect_fixup+0x8d2/0xb30 [ 36.969704] do_mprotect_pkey+0x87e/0xd40 [ 36.970213] __x64_sys_mprotect+0x78/0xc0 [ 36.970770] do_syscall_64+0x3f/0x90 [ 36.971235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.971873] [ 36.972085] Freed by task 213: [ 36.972473] kasan_save_stack+0x22/0x50 [ 36.972986] kasan_set_track+0x25/0x30 [ 36.973471] kasan_save_free_info+0x2b/0x50 [ 36.974007] __kasan_slab_free+0x10a/0x190 [ 36.974528] kmem_cache_free+0x10d/0x4d0 [ 36.975046] rcu_core+0x8c8/0x2860 [ 36.975480] __do_softirq+0x1b7/0x7d4 [ 36.975968] [ 36.976180] Last potentially related work creation: [ 36.976808] kasan_save_stack+0x22/0x50 [ 36.977335] __kasan_record_aux_stack+0x8e/0xa0 [ 36.977929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.978566] remove_vma+0x139/0x170 [ 36.979038] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.979611] do_vmi_munmap+0x1f1/0x2b0 [ 36.980114] __vm_munmap+0x138/0x3a0 [ 36.980593] __x64_sys_munmap+0x59/0x80 [ 36.981101] do_syscall_64+0x3f/0x90 [ 36.981568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.982214] [ 36.982422] Second to last potentially related work creation: [ 36.983118] kasan_save_stack+0x22/0x50 [ 36.983634] __kasan_record_aux_stack+0x8e/0xa0 [ 36.984202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.984848] remove_vma+0x139/0x170 [ 36.985291] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.985846] do_vmi_munmap+0x1f1/0x2b0 [ 36.986325] mmap_region+0x1f9/0x2660 [ 36.986852] do_mmap+0x854/0xf00 [ 36.987280] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.987798] ksys_mmap_pgoff+0x3af/0x500 [ 36.988300] do_syscall_64+0x3f/0x90 [ 36.988791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.989430] [ 36.989664] The buggy address belongs to the object at ffff88800e2ed658 [ 36.989664] which belongs to the cache vm_area_struct of size 168 [ 36.991136] The buggy address is located 88 bytes inside of [ 36.991136] freed 168-byte region [ffff88800e2ed658, ffff88800e2ed700) [ 36.992523] [ 36.992747] The buggy address belongs to the physical page: [ 36.993386] page:000000009cc70981 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ed [ 36.994447] memcg:ffff88800e460601 [ 36.994889] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.995521] page_type: 0xffffffff() [ 36.995996] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.996897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e460601 [ 36.997800] page dumped because: kasan: bad access detected [ 36.998454] [ 36.998684] Memory state around the buggy address: [ 36.999273] ffff88800e2ed580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.000153] ffff88800e2ed600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.001023] >ffff88800e2ed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.001881] ^ [ 37.002454] ffff88800e2ed700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.003312] ffff88800e2ed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.004147] ================================================================== [ 37.005096] Disabling lock debugging due to kernel taint [ 38.992092] BUG: Bad rss-counter state mm:00000000ac8c058a type:MM_FILEPAGES val:33 [ 38.992855] BUG: Bad rss-counter state mm:00000000ac8c058a type:MM_ANONPAGES val:22 [ 39.514794] BUG: Bad rss-counter state mm:00000000cea99393 type:MM_FILEPAGES val:33 [ 39.516159] BUG: Bad rss-counter state mm:00000000cea99393 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7410' (ECDSA) to the list of known hosts. 2023/06/20 06:20:39 fuzzer started 2023/06/20 06:20:40 dialing manager at localhost:44161 2023/06/20 06:20:40 checking machine... 2023/06/20 06:20:40 checking revisions... [ 40.275425] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:20:40 testing simple program... [ 40.322850] cgroup: Unknown subsys name 'net' [ 40.368387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fb18f57d000 CR3=0000000005482000 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=00007fa77cc9b51000005645c05d1790 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 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801038c000 RCX=0000000000000000 RDX=1ffff110020718e0 RSI=ffffffff8191d8f2 RDI=ffff88801038c700 RBP=ffff8880191082f0 RSP=ffff88801430f850 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000020 R11=3830306234386136 R12=ffffffffffffffdc R13=ffff8880090b2658 R14=ffff88801430fc58 R15=ffff88801430f8a8 RIP=ffffffff814c07eb 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 00007fc4965ef900 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=00007fb18fb9d650 CR3=000000000f2b6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fdfd32025b600a8c00000000000ae988 XMM05=f3dcc5f4e8ce40760000000000136868 XMM06=22531d829912effd0000000000135608 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000