syzkaller login: [ 32.855951] BUG: Bad rss-counter state mm:00000000d93965ce type:MM_FILEPAGES val:33 [ 32.857136] BUG: Bad rss-counter state mm:00000000d93965ce type:MM_ANONPAGES val:22 [ 33.026610] ================================================================== [ 33.027729] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.028965] Read of size 8 at addr ffff88800d822140 by task sshd/219 [ 33.029818] [ 33.030041] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.030906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.031905] Call Trace: [ 33.032225] [ 33.032510] dump_stack_lvl+0x91/0xf0 [ 33.033010] print_report+0xcc/0x620 [ 33.033498] ? __virt_addr_valid+0x102/0x340 [ 33.034068] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.034690] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.035308] kasan_report+0xbe/0xf0 [ 33.035784] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.036412] vma_interval_tree_remove+0xc75/0xec0 [ 33.037017] vma_prepare+0xc54/0x11a0 [ 33.037505] __split_vma+0x5af/0x950 [ 33.038005] ? __pfx___split_vma+0x10/0x10 [ 33.038539] ? find_held_lock+0x2c/0x110 [ 33.039097] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.039668] ? lock_is_held_type+0x9f/0x120 [ 33.040205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.040811] ? mtree_range_walk+0x632/0x900 [ 33.041377] ? mas_walk+0x5c7/0x7c0 [ 33.041866] do_vmi_munmap+0x1f1/0x2b0 [ 33.042371] mmap_region+0x1f9/0x2660 [ 33.042870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.043389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.044103] ? __pfx_lock_acquire+0x10/0x10 [ 33.044637] ? __pfx_mmap_region+0x10/0x10 [ 33.045172] ? security_mmap_addr+0x7d/0xa0 [ 33.045725] ? get_unmapped_area+0x1f5/0x3f0 [ 33.046287] do_mmap+0x854/0xf00 [ 33.046733] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.047226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.047795] ksys_mmap_pgoff+0x3af/0x500 [ 33.048310] do_syscall_64+0x3f/0x90 [ 33.048796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.049470] RIP: 0033:0x7f441f401d82 [ 33.050098] 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 [ 33.052285] RSP: 002b:00007ffe34634af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.053221] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f441f401d82 [ 33.054115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f441e83b000 [ 33.054989] RBP: 00007f441e83b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.055860] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db46b91ec0 [ 33.056770] R13: 00007ffe34634b10 R14: 00007ffe34634b40 R15: 00007ffe34634ea0 [ 33.057694] [ 33.058008] [ 33.058239] Allocated by task 212: [ 33.058692] kasan_save_stack+0x22/0x50 [ 33.059250] kasan_set_track+0x25/0x30 [ 33.059774] __kasan_slab_alloc+0x59/0x70 [ 33.060353] kmem_cache_alloc+0x16b/0x370 [ 33.060908] vm_area_dup+0x20/0x160 [ 33.061406] __split_vma+0x170/0x950 [ 33.061914] split_vma+0xc6/0x110 [ 33.062391] mprotect_fixup+0x8d2/0xb30 [ 33.062924] do_mprotect_pkey+0x87e/0xd40 [ 33.063494] __x64_sys_mprotect+0x78/0xc0 [ 33.064047] do_syscall_64+0x3f/0x90 [ 33.064567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.065262] [ 33.065490] Freed by task 212: [ 33.065911] kasan_save_stack+0x22/0x50 [ 33.066439] kasan_set_track+0x25/0x30 [ 33.066959] kasan_save_free_info+0x2b/0x50 [ 33.067515] __kasan_slab_free+0x10a/0x190 [ 33.068053] kmem_cache_free+0x10d/0x4d0 [ 33.068599] rcu_core+0x8c8/0x2860 [ 33.069064] __do_softirq+0x1b7/0x7d4 [ 33.069584] [ 33.069824] Last potentially related work creation: [ 33.070530] kasan_save_stack+0x22/0x50 [ 33.071049] __kasan_record_aux_stack+0x8e/0xa0 [ 33.071674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.072368] remove_vma+0x139/0x170 [ 33.072840] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.073425] do_vmi_munmap+0x1f1/0x2b0 [ 33.073960] __vm_munmap+0x138/0x3a0 [ 33.074460] __x64_sys_munmap+0x59/0x80 [ 33.074962] do_syscall_64+0x3f/0x90 [ 33.075449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.076096] [ 33.076323] The buggy address belongs to the object at ffff88800d8220e8 [ 33.076323] which belongs to the cache vm_area_struct of size 168 [ 33.077893] The buggy address is located 88 bytes inside of [ 33.077893] freed 168-byte region [ffff88800d8220e8, ffff88800d822190) [ 33.079357] [ 33.079579] The buggy address belongs to the physical page: [ 33.080265] page:00000000da482f57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd822 [ 33.081381] memcg:ffff88800edb0c01 [ 33.081834] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.082509] page_type: 0xffffffff() [ 33.082975] raw: 0100000000000200 ffff88800879fc80 ffffea00003818c0 dead000000000004 [ 33.083928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edb0c01 [ 33.084872] page dumped because: kasan: bad access detected [ 33.085552] [ 33.085788] Memory state around the buggy address: [ 33.086381] ffff88800d822000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.087260] ffff88800d822080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.088125] >ffff88800d822100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.089016] ^ [ 33.089677] ffff88800d822180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.090592] ffff88800d822200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.091501] ================================================================== [ 33.092543] Disabling lock debugging due to kernel taint [ 35.775384] BUG: Bad rss-counter state mm:000000005eb7510c type:MM_FILEPAGES val:33 [ 35.776954] BUG: Bad rss-counter state mm:000000005eb7510c type:MM_ANONPAGES val:22 [ 36.337868] BUG: Bad rss-counter state mm:0000000065f76450 type:MM_FILEPAGES val:33 [ 36.338955] BUG: Bad rss-counter state mm:0000000065f76450 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30586' (ECDSA) to the list of known hosts. 2023/06/19 19:40:57 fuzzer started 2023/06/19 19:40:57 dialing manager at localhost:44161 2023/06/19 19:40:57 checking machine... 2023/06/19 19:40:57 checking revisions... [ 36.960791] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:40:57 testing simple program... [ 37.011427] cgroup: Unknown subsys name 'net' [ 37.044398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000002 RCX=00007fbff4d73440 RDX=00000000ffffffff RSI=00007fffcfa6cf40 RDI=00007fffcfa6ce50 RBP=0000000000000005 RSP=00007fffcfa6cb60 R8 =0000000000000000 R9 =0000000000000010 R10=0000000000000002 R11=0000000000656434 R12=00007fffcfa6ce50 R13=00007fffcfa6cf40 R14=0000000000000000 R15=00007fffcfa6cce0 RIP=00007fbff4a017a9 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbff41f9900 00000000 00000000 GS =0000 0000000000000000 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=00007fbff36753e0 CR3=00000000096ee000 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=253537d845d4dc4200000000000ae988 XMM01=d3fdd5f48436fbd700000000000aead0 XMM02=ac585006bc0bee6f00000000000fae08 XMM03=eff9b2d0a8fce9cb000000000011d908 XMM04=937451aa60bd7857000000000011da90 XMM05=ec2efd57dc4c00df000000000011d9c0 XMM06=2fccd54c36d8a3f300000000000fcfb0 XMM07=693bd129e125714a00000000000fac10 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000e RBX=0000563452862930 RCX=0000000000000000 RDX=0000000000000002 RSI=00007ffe3d597460 RDI=00005634528420e0 RBP=00007ffe3d597560 RSP=00007ffe3d5972f0 R8 =00005634528420d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=0000000000000021 R13=0000000000000021 R14=0000000000000020 R15=0000000000000000 RIP=00007faffa0cacd7 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faff953f900 00000000 00000000 GS =0000 0000000000000000 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=00007faff94ff008 CR3=000000000e4ca000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000