syzkaller login: [ 32.847613] BUG: Bad rss-counter state mm:00000000ecb576ab type:MM_FILEPAGES val:33 [ 32.848884] BUG: Bad rss-counter state mm:00000000ecb576ab type:MM_ANONPAGES val:22 [ 32.959879] ================================================================== [ 32.960844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.961826] Read of size 8 at addr ffff8880097e3228 by task sshd/222 [ 32.962720] [ 32.962945] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.963839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.964879] Call Trace: [ 32.965216] <TASK> [ 32.965524] dump_stack_lvl+0x91/0xf0 [ 32.966035] print_report+0xcc/0x620 [ 32.966535] ? __virt_addr_valid+0x102/0x340 [ 32.967103] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.967736] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.968375] kasan_report+0xbe/0xf0 [ 32.968869] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.969520] vma_interval_tree_remove+0xc75/0xec0 [ 32.970150] vma_prepare+0xc54/0x11a0 [ 32.970642] __split_vma+0x5af/0x950 [ 32.971138] ? __pfx___split_vma+0x10/0x10 [ 32.971690] ? find_held_lock+0x2c/0x110 [ 32.972237] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.972819] ? lock_is_held_type+0x9f/0x120 [ 32.973377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.974027] ? mtree_range_walk+0x632/0x900 [ 32.974598] ? mas_walk+0x5c7/0x7c0 [ 32.975088] do_vmi_munmap+0x1f1/0x2b0 [ 32.975594] mmap_region+0x1f9/0x2660 [ 32.976092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.976629] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.977370] ? __pfx_lock_acquire+0x10/0x10 [ 32.977931] ? __pfx_mmap_region+0x10/0x10 [ 32.978484] ? security_mmap_addr+0x7d/0xa0 [ 32.979035] ? get_unmapped_area+0x1f5/0x3f0 [ 32.979608] do_mmap+0x854/0xf00 [ 32.980067] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.980577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.981167] ksys_mmap_pgoff+0x3af/0x500 [ 32.981700] do_syscall_64+0x3f/0x90 [ 32.982198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.982860] RIP: 0033:0x7fb35616dd82 [ 32.983343] 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 [ 32.985588] RSP: 002b:00007ffd621ecae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.986520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb35616dd82 [ 32.987396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3555a7000 [ 32.988273] RBP: 00007fb3555a7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.989163] R10: 0000000000000812 R11: 0000000000000206 R12: 000056344ea5ab20 [ 32.990053] R13: 00007ffd621ecb00 R14: 00007ffd621ecb30 R15: 00007ffd621ece90 [ 32.990947] </TASK> [ 32.991256] [ 32.991478] Allocated by task 215: [ 32.991925] kasan_save_stack+0x22/0x50 [ 32.992447] kasan_set_track+0x25/0x30 [ 32.992953] __kasan_slab_alloc+0x59/0x70 [ 32.993522] kmem_cache_alloc+0x16b/0x370 [ 32.994046] vm_area_dup+0x20/0x160 [ 32.994501] __split_vma+0x170/0x950 [ 32.994967] split_vma+0xc6/0x110 [ 32.995402] mprotect_fixup+0x8d2/0xb30 [ 32.995900] do_mprotect_pkey+0x87e/0xd40 [ 32.996418] __x64_sys_mprotect+0x78/0xc0 [ 32.996933] do_syscall_64+0x3f/0x90 [ 32.997400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.998047] [ 32.998266] Freed by task 215: [ 32.998654] kasan_save_stack+0x22/0x50 [ 32.999156] kasan_set_track+0x25/0x30 [ 32.999653] kasan_save_free_info+0x2b/0x50 [ 33.000186] __kasan_slab_free+0x10a/0x190 [ 33.000727] kmem_cache_free+0x10d/0x4d0 [ 33.001237] rcu_core+0x8c8/0x2860 [ 33.001710] __do_softirq+0x1b7/0x7d4 [ 33.002182] [ 33.002395] Last potentially related work creation: [ 33.002993] kasan_save_stack+0x22/0x50 [ 33.003493] __kasan_record_aux_stack+0x8e/0xa0 [ 33.004066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.004708] remove_vma+0x139/0x170 [ 33.005156] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.005723] do_vmi_munmap+0x1f1/0x2b0 [ 33.006216] __vm_munmap+0x138/0x3a0 [ 33.006685] __x64_sys_munmap+0x59/0x80 [ 33.007179] do_syscall_64+0x3f/0x90 [ 33.007653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.008284] [ 33.008495] The buggy address belongs to the object at ffff8880097e31d0 [ 33.008495] which belongs to the cache vm_area_struct of size 168 [ 33.009963] The buggy address is located 88 bytes inside of [ 33.009963] freed 168-byte region [ffff8880097e31d0, ffff8880097e3278) [ 33.011351] [ 33.011563] The buggy address belongs to the physical page: [ 33.012244] page:000000002a4fd124 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97e3 [ 33.013313] memcg:ffff88800cf7df01 [ 33.013748] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.014434] page_type: 0xffffffff() [ 33.014876] raw: 0100000000000200 ffff88800879fc80 ffffea00003b9080 dead000000000003 [ 33.015785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf7df01 [ 33.016673] page dumped because: kasan: bad access detected [ 33.017332] [ 33.017554] Memory state around the buggy address: [ 33.018133] ffff8880097e3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.018977] ffff8880097e3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.019823] >ffff8880097e3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.020670] ^ [ 33.021237] ffff8880097e3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.022112] ffff8880097e3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.022958] ================================================================== [ 33.023974] Disabling lock debugging due to kernel taint [ 35.002280] BUG: Bad rss-counter state mm:000000008e27af56 type:MM_FILEPAGES val:33 [ 35.003493] BUG: Bad rss-counter state mm:000000008e27af56 type:MM_ANONPAGES val:22 [ 35.510123] BUG: Bad rss-counter state mm:00000000e34bb848 type:MM_FILEPAGES val:33 [ 35.511138] BUG: Bad rss-counter state mm:00000000e34bb848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4754' (ECDSA) to the list of known hosts. 2023/06/20 06:10:37 fuzzer started 2023/06/20 06:10:38 dialing manager at localhost:44161 2023/06/20 06:10:38 checking machine... 2023/06/20 06:10:38 checking revisions... [ 36.284206] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:10:38 testing simple program... [ 36.323773] cgroup: Unknown subsys name 'net' [ 36.361462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:35 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff86605973 RSP=ffff88806ce09a18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86605973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800fda4c60 RIP=ffffffff8450bdca RFL=00000286 [--S--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 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=00007f6971ae3f10 CR3=000000000c5a2000 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=7a397a6e10463182874c0edbd0f0209a XMM02=2c67c8bc2e329bc3000000000011c5c0 XMM03=fb795ef6d65770560000000000124710 XMM04=f94bac529b4459f200000000000ae988 XMM05=59d5b690e0af863b0000000000134310 XMM06=00c3ffa147b8d8570000000000134198 XMM07=e042d86d42eb936e0000000000124990 XMM08=0478bac64264fb28000000000011c620 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff837264db RDX=ffff88800e8db680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff88800f7577b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=ffffffff87f96af0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c07e4 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 00007fdaf658b900 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=00007ffc459c0000 CR3=000000000eecc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000