syzkaller login: [ 31.146730] BUG: Bad rss-counter state mm:00000000aaffe071 type:MM_FILEPAGES val:33 [ 31.147742] BUG: Bad rss-counter state mm:00000000aaffe071 type:MM_ANONPAGES val:22 [ 31.187251] ================================================================== [ 31.188243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.189303] Read of size 8 at addr ffff888019eb0140 by task sshd/219 [ 31.190164] [ 31.190407] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.191381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.192505] Call Trace: [ 31.192819] [ 31.193122] dump_stack_lvl+0x91/0xf0 [ 31.193755] print_report+0xcc/0x620 [ 31.194238] ? __virt_addr_valid+0x102/0x340 [ 31.194797] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195411] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196032] kasan_report+0xbe/0xf0 [ 31.196498] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197136] vma_interval_tree_remove+0xc75/0xec0 [ 31.197739] vma_prepare+0xc54/0x11a0 [ 31.198211] __split_vma+0x5af/0x950 [ 31.198676] ? __pfx___split_vma+0x10/0x10 [ 31.199198] ? find_held_lock+0x2c/0x110 [ 31.199712] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.200280] ? lock_is_held_type+0x9f/0x120 [ 31.200814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.201421] ? mtree_range_walk+0x632/0x900 [ 31.201965] ? mas_walk+0x5c7/0x7c0 [ 31.202435] do_vmi_munmap+0x1f1/0x2b0 [ 31.202920] mmap_region+0x1f9/0x2660 [ 31.203396] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.203900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.204606] ? __pfx_lock_acquire+0x10/0x10 [ 31.205148] ? __pfx_mmap_region+0x10/0x10 [ 31.205672] ? security_mmap_addr+0x7d/0xa0 [ 31.206199] ? get_unmapped_area+0x1f5/0x3f0 [ 31.206746] do_mmap+0x854/0xf00 [ 31.207176] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.207674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.208232] ksys_mmap_pgoff+0x3af/0x500 [ 31.208732] do_syscall_64+0x3f/0x90 [ 31.209215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209864] RIP: 0033:0x7fd03259fd82 [ 31.210314] 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 [ 31.212423] RSP: 002b:00007ffe37e4c318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.213337] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd03259fd82 [ 31.214173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0319d9000 [ 31.215016] RBP: 00007fd0319d9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.215853] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a74feeec0 [ 31.216689] R13: 00007ffe37e4c330 R14: 00007ffe37e4c360 R15: 00007ffe37e4c6c0 [ 31.217545] [ 31.217835] [ 31.218047] Allocated by task 212: [ 31.218469] kasan_save_stack+0x22/0x50 [ 31.218964] kasan_set_track+0x25/0x30 [ 31.219451] __kasan_slab_alloc+0x59/0x70 [ 31.219968] kmem_cache_alloc+0x16b/0x370 [ 31.220480] vm_area_dup+0x20/0x160 [ 31.220942] __split_vma+0x170/0x950 [ 31.221402] split_vma+0xc6/0x110 [ 31.221837] mprotect_fixup+0x8d2/0xb30 [ 31.222328] do_mprotect_pkey+0x87e/0xd40 [ 31.222846] __x64_sys_mprotect+0x78/0xc0 [ 31.223360] do_syscall_64+0x3f/0x90 [ 31.223838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224478] [ 31.224689] Freed by task 13: [ 31.225088] kasan_save_stack+0x22/0x50 [ 31.225595] kasan_set_track+0x25/0x30 [ 31.226088] kasan_save_free_info+0x2b/0x50 [ 31.226620] __kasan_slab_free+0x10a/0x190 [ 31.227149] kmem_cache_free+0x10d/0x4d0 [ 31.227647] rcu_core+0x8c8/0x2860 [ 31.228085] __do_softirq+0x1b7/0x7d4 [ 31.228561] [ 31.228773] Last potentially related work creation: [ 31.229364] kasan_save_stack+0x22/0x50 [ 31.229859] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.231052] remove_vma+0x139/0x170 [ 31.231495] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.232105] do_vmi_munmap+0x1f1/0x2b0 [ 31.232593] __vm_munmap+0x138/0x3a0 [ 31.233074] __x64_sys_munmap+0x59/0x80 [ 31.233566] do_syscall_64+0x3f/0x90 [ 31.234041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234676] [ 31.234893] The buggy address belongs to the object at ffff888019eb00e8 [ 31.234893] which belongs to the cache vm_area_struct of size 168 [ 31.236349] The buggy address is located 88 bytes inside of [ 31.236349] freed 168-byte region [ffff888019eb00e8, ffff888019eb0190) [ 31.237738] [ 31.237951] The buggy address belongs to the physical page: [ 31.238608] page:00000000dc312bb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eb0 [ 31.239683] memcg:ffff88800da44701 [ 31.240099] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240730] page_type: 0xffffffff() [ 31.241187] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.242093] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da44701 [ 31.242986] page dumped because: kasan: bad access detected [ 31.243634] [ 31.243845] Memory state around the buggy address: [ 31.244423] ffff888019eb0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.245280] ffff888019eb0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.246119] >ffff888019eb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246955] ^ [ 31.247584] ffff888019eb0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.248433] ffff888019eb0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.249287] ================================================================== [ 31.250198] Disabling lock debugging due to kernel taint [ 33.590533] BUG: Bad rss-counter state mm:0000000011bbe900 type:MM_FILEPAGES val:33 [ 33.591834] BUG: Bad rss-counter state mm:0000000011bbe900 type:MM_ANONPAGES val:22 [ 34.120457] BUG: Bad rss-counter state mm:0000000007dfe65b type:MM_FILEPAGES val:33 [ 34.121635] BUG: Bad rss-counter state mm:0000000007dfe65b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51078' (ECDSA) to the list of known hosts. 2023/06/21 04:15:33 fuzzer started 2023/06/21 04:15:33 dialing manager at localhost:36067 2023/06/21 04:15:33 checking machine... 2023/06/21 04:15:33 checking revisions... [ 34.860214] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:15:34 testing simple program... [ 34.918080] cgroup: Unknown subsys name 'net' [ 34.955986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:33 Registers: info registers vcpu 0 RAX=000000004bb50d70 RBX=000000000000e8ba RCX=0000000000000000 RDX=0000000000000017 RSI=ffffffff813c925d RDI=ffffffff85497f20 RBP=0000000000000000 RSP=ffff88806ce09f70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff810a48a7 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 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=00007f803f023650 CR3=00000000096f2000 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=2033333a35313a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35313a3430203132 XMM08=3d656e696c646d632022656369767265 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=00007f9ceffaae60 CR3=000000000c62e000 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=f37006ba755bc39f27470994f95ba1da XMM02=2c67c8bc2e329bc30000000000119da8 XMM03=fb795ef6d65770560000000000121210 XMM04=ab48854a2aaf37c100000000000ae988 XMM05=dfcdbad4f1609c3700000000001310b0 XMM06=806171799158d9670000000000130f38 XMM07=e042d86d42eb936e0000000000121490 XMM08=9e57ac4feba7a90d0000000000119e08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000