syzkaller login: [ 35.113158] BUG: Bad rss-counter state mm:00000000f718018b type:MM_FILEPAGES val:33 [ 35.114536] BUG: Bad rss-counter state mm:00000000f718018b type:MM_ANONPAGES val:22 [ 35.270940] ================================================================== [ 35.272022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.273133] Read of size 8 at addr ffff888014601228 by task sshd/219 [ 35.274192] [ 35.274427] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.275341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.276375] Call Trace: [ 35.276713] [ 35.277018] dump_stack_lvl+0x91/0xf0 [ 35.277539] print_report+0xcc/0x620 [ 35.278058] ? __virt_addr_valid+0x102/0x340 [ 35.278639] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.279291] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.279946] kasan_report+0xbe/0xf0 [ 35.280453] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.281118] vma_interval_tree_remove+0xc75/0xec0 [ 35.281772] vma_prepare+0xc54/0x11a0 [ 35.282325] __split_vma+0x5af/0x950 [ 35.282844] ? __pfx___split_vma+0x10/0x10 [ 35.283424] ? find_held_lock+0x2c/0x110 [ 35.283992] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.284610] ? mas_destroy+0x1fe/0x8b0 [ 35.285163] ? lock_is_held_type+0x9f/0x120 [ 35.285756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.286431] ? mtree_range_walk+0x632/0x900 [ 35.287041] ? mas_walk+0x5c7/0x7c0 [ 35.287569] do_vmi_munmap+0x1f1/0x2b0 [ 35.288112] mmap_region+0x1f9/0x2660 [ 35.288645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.289207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.290006] ? __pfx_lock_acquire+0x10/0x10 [ 35.290589] ? __pfx_mmap_region+0x10/0x10 [ 35.291172] ? security_mmap_addr+0x7d/0xa0 [ 35.291754] ? get_unmapped_area+0x1f5/0x3f0 [ 35.292354] do_mmap+0x854/0xf00 [ 35.292837] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.293378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.294012] ksys_mmap_pgoff+0x3af/0x500 [ 35.294574] do_syscall_64+0x3f/0x90 [ 35.295102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.295815] RIP: 0033:0x7f364e27bd82 [ 35.296318] 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 [ 35.298659] RSP: 002b:00007ffd876090e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.299652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f364e27bd82 [ 35.300584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f364d6b5000 [ 35.301515] RBP: 00007f364d6b5000 R08: 0000000000000009 R09: 0000000000001000 [ 35.302458] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c16a0cbf60 [ 35.303408] R13: 00007ffd87609100 R14: 00007ffd87609130 R15: 00007ffd87609490 [ 35.304355] [ 35.304677] [ 35.304911] Allocated by task 212: [ 35.305384] kasan_save_stack+0x22/0x50 [ 35.305949] kasan_set_track+0x25/0x30 [ 35.306491] __kasan_slab_alloc+0x59/0x70 [ 35.307066] kmem_cache_alloc+0x16b/0x370 [ 35.307638] vm_area_dup+0x20/0x160 [ 35.308139] __split_vma+0x170/0x950 [ 35.308652] split_vma+0xc6/0x110 [ 35.309133] mprotect_fixup+0x8d2/0xb30 [ 35.309686] do_mprotect_pkey+0x87e/0xd40 [ 35.310275] __x64_sys_mprotect+0x78/0xc0 [ 35.310849] do_syscall_64+0x3f/0x90 [ 35.311370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.312083] [ 35.312315] Freed by task 212: [ 35.312748] kasan_save_stack+0x22/0x50 [ 35.313299] kasan_set_track+0x25/0x30 [ 35.313837] kasan_save_free_info+0x2b/0x50 [ 35.314429] __kasan_slab_free+0x10a/0x190 [ 35.315063] kmem_cache_free+0x10d/0x4d0 [ 35.315640] rcu_core+0x8c8/0x2860 [ 35.316126] __do_softirq+0x1b7/0x7d4 [ 35.316653] [ 35.316889] Last potentially related work creation: [ 35.317533] kasan_save_stack+0x22/0x50 [ 35.318113] __kasan_record_aux_stack+0x8e/0xa0 [ 35.318746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.319453] remove_vma+0x139/0x170 [ 35.319953] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.320565] do_vmi_munmap+0x1f1/0x2b0 [ 35.321099] __vm_munmap+0x138/0x3a0 [ 35.321612] __x64_sys_munmap+0x59/0x80 [ 35.322174] do_syscall_64+0x3f/0x90 [ 35.322694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.323398] [ 35.323634] The buggy address belongs to the object at ffff8880146011d0 [ 35.323634] which belongs to the cache vm_area_struct of size 168 [ 35.325237] The buggy address is located 88 bytes inside of [ 35.325237] freed 168-byte region [ffff8880146011d0, ffff888014601278) [ 35.326789] [ 35.327024] The buggy address belongs to the physical page: [ 35.327749] page:000000001fb2e9bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14601 [ 35.328949] memcg:ffff88800fc66301 [ 35.329417] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.330197] page_type: 0xffffffff() [ 35.330696] raw: 0100000000000200 ffff8880087a0c80 ffffea000067ba40 0000000000000007 [ 35.331707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc66301 [ 35.332702] page dumped because: kasan: bad access detected [ 35.333424] [ 35.333659] Memory state around the buggy address: [ 35.334306] ffff888014601100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.335250] ffff888014601180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.336193] >ffff888014601200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.337126] ^ [ 35.337744] ffff888014601280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.338700] ffff888014601300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.339631] ================================================================== [ 35.340673] Disabling lock debugging due to kernel taint [ 37.319696] BUG: Bad rss-counter state mm:000000005ff06f51 type:MM_FILEPAGES val:33 [ 37.320855] BUG: Bad rss-counter state mm:000000005ff06f51 type:MM_ANONPAGES val:22 [ 37.809955] BUG: Bad rss-counter state mm:0000000052a6c930 type:MM_FILEPAGES val:33 [ 37.811131] BUG: Bad rss-counter state mm:0000000052a6c930 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34207' (ECDSA) to the list of known hosts. 2023/06/21 05:04:50 fuzzer started 2023/06/21 05:04:50 dialing manager at localhost:36067 2023/06/21 05:04:50 checking machine... 2023/06/21 05:04:50 checking revisions... [ 38.592510] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:04:51 testing simple program... [ 38.639315] cgroup: Unknown subsys name 'net' [ 38.679349] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:04:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed1001fb2eec RSP=ffff88800fd97750 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff812d8a35 RFL=00000282 [--S----] 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 00007f90c0a61900 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=00007f90c10190b0 CR3=0000000018722000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f7be0525018 CR3=000000000c738000 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=c5567990008b9d97eb4276e436dd93c4 XMM02=ec2efd57dc4c00df000000000011b210 XMM03=9b868deeb9aaf2e0000000000011b2e0 XMM04=031c7986ec8d1b7500000000000ae988 XMM05=0d540e323557c8b90000000000132a88 XMM06=806171799158d96700000000001317b8 XMM07=e042d86d42eb936e0000000000121ef8 XMM08=9b868deeb9aaf2e0000000000011b2e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000