syzkaller login: [ 43.281120] BUG: Bad rss-counter state mm:000000005b4ed2c5 type:MM_FILEPAGES val:33 [ 43.282361] BUG: Bad rss-counter state mm:000000005b4ed2c5 type:MM_ANONPAGES val:22 [ 43.358161] ================================================================== [ 43.359242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.360474] Read of size 8 at addr ffff88800edfb140 by task sshd/219 [ 43.361322] [ 43.361545] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.362406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.363400] Call Trace: [ 43.363722] [ 43.364005] dump_stack_lvl+0x91/0xf0 [ 43.364498] print_report+0xcc/0x620 [ 43.364984] ? __virt_addr_valid+0x102/0x340 [ 43.365540] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.366168] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.366793] kasan_report+0xbe/0xf0 [ 43.367268] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.367890] vma_interval_tree_remove+0xc75/0xec0 [ 43.368490] vma_prepare+0xc54/0x11a0 [ 43.368965] __split_vma+0x5af/0x950 [ 43.369464] ? __pfx___split_vma+0x10/0x10 [ 43.369986] ? find_held_lock+0x2c/0x110 [ 43.370513] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.371076] ? lock_is_held_type+0x9f/0x120 [ 43.371615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.372233] ? mtree_range_walk+0x632/0x900 [ 43.372783] ? mas_walk+0x5c7/0x7c0 [ 43.373263] do_vmi_munmap+0x1f1/0x2b0 [ 43.373756] mmap_region+0x1f9/0x2660 [ 43.374238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.374750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.375464] ? __pfx_lock_acquire+0x10/0x10 [ 43.376000] ? __pfx_mmap_region+0x10/0x10 [ 43.376530] ? security_mmap_addr+0x7d/0xa0 [ 43.377056] ? get_unmapped_area+0x1f5/0x3f0 [ 43.377606] do_mmap+0x854/0xf00 [ 43.378047] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.378548] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.379106] ksys_mmap_pgoff+0x3af/0x500 [ 43.379608] do_syscall_64+0x3f/0x90 [ 43.380083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.380729] RIP: 0033:0x7fa01d5bbd82 [ 43.381184] 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 [ 43.383342] RSP: 002b:00007ffcc281ef28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.384243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa01d5bbd82 [ 43.385097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa01c9f5000 [ 43.385955] RBP: 00007fa01c9f5000 R08: 0000000000000009 R09: 0000000000001000 [ 43.386796] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aeb09ecec0 [ 43.387632] R13: 00007ffcc281ef40 R14: 00007ffcc281ef70 R15: 00007ffcc281f2d0 [ 43.388485] [ 43.388779] [ 43.388999] Allocated by task 212: [ 43.389437] kasan_save_stack+0x22/0x50 [ 43.389936] kasan_set_track+0x25/0x30 [ 43.390430] __kasan_slab_alloc+0x59/0x70 [ 43.390951] kmem_cache_alloc+0x16b/0x370 [ 43.391465] vm_area_dup+0x20/0x160 [ 43.391924] __split_vma+0x170/0x950 [ 43.392388] split_vma+0xc6/0x110 [ 43.392832] mprotect_fixup+0x8d2/0xb30 [ 43.393345] do_mprotect_pkey+0x87e/0xd40 [ 43.393863] __x64_sys_mprotect+0x78/0xc0 [ 43.394384] do_syscall_64+0x3f/0x90 [ 43.394855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.395494] [ 43.395714] Freed by task 212: [ 43.396108] kasan_save_stack+0x22/0x50 [ 43.396622] kasan_set_track+0x25/0x30 [ 43.397111] kasan_save_free_info+0x2b/0x50 [ 43.397659] __kasan_slab_free+0x10a/0x190 [ 43.398194] kmem_cache_free+0x10d/0x4d0 [ 43.398706] rcu_core+0x8c8/0x2860 [ 43.399148] __do_softirq+0x1b7/0x7d4 [ 43.399622] [ 43.399837] Last potentially related work creation: [ 43.400421] kasan_save_stack+0x22/0x50 [ 43.400918] __kasan_record_aux_stack+0x8e/0xa0 [ 43.401505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.402222] remove_vma+0x139/0x170 [ 43.402675] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.403232] do_vmi_munmap+0x1f1/0x2b0 [ 43.403713] __vm_munmap+0x138/0x3a0 [ 43.404183] __x64_sys_munmap+0x59/0x80 [ 43.404678] do_syscall_64+0x3f/0x90 [ 43.405153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.405801] [ 43.406017] Second to last potentially related work creation: [ 43.406695] kasan_save_stack+0x22/0x50 [ 43.407195] __kasan_record_aux_stack+0x8e/0xa0 [ 43.407774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.408411] remove_vma+0x139/0x170 [ 43.408892] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.409539] do_vmi_munmap+0x1f1/0x2b0 [ 43.410023] mmap_region+0x1f9/0x2660 [ 43.410508] do_mmap+0x854/0xf00 [ 43.410938] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.411429] ksys_mmap_pgoff+0x3af/0x500 [ 43.411928] do_syscall_64+0x3f/0x90 [ 43.412399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.413037] [ 43.413258] The buggy address belongs to the object at ffff88800edfb0e8 [ 43.413258] which belongs to the cache vm_area_struct of size 168 [ 43.414717] The buggy address is located 88 bytes inside of [ 43.414717] freed 168-byte region [ffff88800edfb0e8, ffff88800edfb190) [ 43.416134] [ 43.416350] The buggy address belongs to the physical page: [ 43.417011] page:0000000052e43511 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedfb [ 43.418118] memcg:ffff88801691e601 [ 43.418555] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.419198] page_type: 0xffffffff() [ 43.419648] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3380 dead000000000006 [ 43.420571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801691e601 [ 43.421497] page dumped because: kasan: bad access detected [ 43.422170] [ 43.422384] Memory state around the buggy address: [ 43.422965] ffff88800edfb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.423814] ffff88800edfb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 43.424662] >ffff88800edfb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.425516] ^ [ 43.426151] ffff88800edfb180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 43.427007] ffff88800edfb200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.427853] ================================================================== [ 43.428850] Disabling lock debugging due to kernel taint [ 45.662421] BUG: Bad rss-counter state mm:0000000056fde5b3 type:MM_FILEPAGES val:33 [ 45.663611] BUG: Bad rss-counter state mm:0000000056fde5b3 type:MM_ANONPAGES val:22 [ 46.159779] BUG: Bad rss-counter state mm:000000009786664e type:MM_FILEPAGES val:33 [ 46.160989] BUG: Bad rss-counter state mm:000000009786664e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54890' (ECDSA) to the list of known hosts. 2023/06/19 15:23:12 fuzzer started 2023/06/19 15:23:12 dialing manager at localhost:44161 2023/06/19 15:23:12 checking machine... 2023/06/19 15:23:12 checking revisions... [ 46.909676] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:23:12 testing simple program... [ 46.956583] cgroup: Unknown subsys name 'net' [ 47.016136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:07 Registers: info registers vcpu 0 RAX=1ffff11001c76439 RBX=ffff88800e3b2198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e3b21c8 RBP=ffff88800c6ffd80 RSP=ffff888015e47888 R8 =0000000000000001 R9 =ffffed1002bc8f05 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c708c00 R14=ffffffff83677d2f R15=ffff88800d979900 RIP=ffffffff81846362 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 00007f09d50b8700 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=00007fff9fa23000 CR3=000000000ff9c000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383033 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=0000000000000003 RBX=0000000000000200 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=ffff88806cf407d0 RSP=ffff88800d5e75f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000110010 R12=ffff88800879fc80 R13=ffffea0000370b80 R14=0000000000000000 R15=000000000000000c RIP=ffffffff818061b7 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 00007f05245c2900 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=00007f05239afb90 CR3=000000000c758000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c5b1dba5ea19a83300000000000ae988 XMM05=89e6791430aa11a00000000000136298 XMM06=4fda316b135da52b0000000000135338 XMM07=fb795ef6d65770560000000000123dd8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000