syzkaller login: [ 68.066762] BUG: Bad rss-counter state mm:00000000c69b5709 type:MM_FILEPAGES val:33 [ 68.068227] BUG: Bad rss-counter state mm:00000000c69b5709 type:MM_ANONPAGES val:22 [ 68.213449] ================================================================== [ 68.214380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.215356] Read of size 8 at addr ffff88800ee52228 by task sshd/221 [ 68.216156] [ 68.216461] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.217527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.218528] Call Trace: [ 68.218856] [ 68.219183] dump_stack_lvl+0x91/0xf0 [ 68.219694] print_report+0xcc/0x620 [ 68.220186] ? __virt_addr_valid+0x102/0x340 [ 68.220756] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.221376] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.221996] kasan_report+0xbe/0xf0 [ 68.222478] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.223108] vma_interval_tree_remove+0xc75/0xec0 [ 68.223719] vma_prepare+0xc54/0x11a0 [ 68.224195] __split_vma+0x5af/0x950 [ 68.224669] ? __pfx___split_vma+0x10/0x10 [ 68.225198] ? find_held_lock+0x2c/0x110 [ 68.225722] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.226294] ? lock_is_held_type+0x9f/0x120 [ 68.226836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.227457] ? mtree_range_walk+0x632/0x900 [ 68.228015] ? mas_walk+0x5c7/0x7c0 [ 68.228492] do_vmi_munmap+0x1f1/0x2b0 [ 68.228983] mmap_region+0x1f9/0x2660 [ 68.229466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.229972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.230698] ? __pfx_lock_acquire+0x10/0x10 [ 68.231251] ? __pfx_mmap_region+0x10/0x10 [ 68.231782] ? security_mmap_addr+0x7d/0xa0 [ 68.232309] ? get_unmapped_area+0x1f5/0x3f0 [ 68.232860] do_mmap+0x854/0xf00 [ 68.233306] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.233806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.234369] ksys_mmap_pgoff+0x3af/0x500 [ 68.234871] do_syscall_64+0x3f/0x90 [ 68.235357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.235995] RIP: 0033:0x7f33ddb64d82 [ 68.236449] 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 [ 68.238571] RSP: 002b:00007fff299a9408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.239495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33ddb64d82 [ 68.240341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33dcf9e000 [ 68.241179] RBP: 00007f33dcf9e000 R08: 0000000000000009 R09: 0000000000001000 [ 68.242023] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c291968ec0 [ 68.242875] R13: 00007fff299a9420 R14: 00007fff299a9450 R15: 00007fff299a97b0 [ 68.243749] [ 68.244038] [ 68.244259] Allocated by task 214: [ 68.244687] kasan_save_stack+0x22/0x50 [ 68.245194] kasan_set_track+0x25/0x30 [ 68.245692] __kasan_slab_alloc+0x59/0x70 [ 68.246219] kmem_cache_alloc+0x16b/0x370 [ 68.246733] vm_area_dup+0x20/0x160 [ 68.247200] __split_vma+0x170/0x950 [ 68.247663] split_vma+0xc6/0x110 [ 68.248104] mprotect_fixup+0x8d2/0xb30 [ 68.248605] do_mprotect_pkey+0x87e/0xd40 [ 68.249126] __x64_sys_mprotect+0x78/0xc0 [ 68.249647] do_syscall_64+0x3f/0x90 [ 68.250119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.250753] [ 68.250970] Freed by task 214: [ 68.251390] kasan_save_stack+0x22/0x50 [ 68.251900] kasan_set_track+0x25/0x30 [ 68.252396] kasan_save_free_info+0x2b/0x50 [ 68.252927] __kasan_slab_free+0x10a/0x190 [ 68.253460] kmem_cache_free+0x10d/0x4d0 [ 68.253983] rcu_core+0x8c8/0x2860 [ 68.254435] __do_softirq+0x1b7/0x7d4 [ 68.254911] [ 68.255137] Last potentially related work creation: [ 68.255724] kasan_save_stack+0x22/0x50 [ 68.256230] __kasan_record_aux_stack+0x8e/0xa0 [ 68.256803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.257448] remove_vma+0x139/0x170 [ 68.257897] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.258453] do_vmi_munmap+0x1f1/0x2b0 [ 68.258935] __vm_munmap+0x138/0x3a0 [ 68.259421] __x64_sys_munmap+0x59/0x80 [ 68.259922] do_syscall_64+0x3f/0x90 [ 68.260399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.261042] [ 68.261258] The buggy address belongs to the object at ffff88800ee521d0 [ 68.261258] which belongs to the cache vm_area_struct of size 168 [ 68.262728] The buggy address is located 88 bytes inside of [ 68.262728] freed 168-byte region [ffff88800ee521d0, ffff88800ee52278) [ 68.264131] [ 68.264352] The buggy address belongs to the physical page: [ 68.265036] page:00000000c506e743 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee52 [ 68.266128] memcg:ffff88800ea00d01 [ 68.266561] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.267237] page_type: 0xffffffff() [ 68.267698] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 68.268615] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea00d01 [ 68.269517] page dumped because: kasan: bad access detected [ 68.270189] [ 68.270418] Memory state around the buggy address: [ 68.271003] ffff88800ee52100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.271871] ffff88800ee52180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.272723] >ffff88800ee52200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.273580] ^ [ 68.274139] ffff88800ee52280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.275005] ffff88800ee52300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.275861] ================================================================== [ 68.276841] Disabling lock debugging due to kernel taint [ 70.144882] BUG: Bad rss-counter state mm:0000000094209d4f type:MM_FILEPAGES val:33 [ 70.145870] BUG: Bad rss-counter state mm:0000000094209d4f type:MM_ANONPAGES val:22 [ 70.709239] BUG: Bad rss-counter state mm:000000000942f6bb type:MM_FILEPAGES val:33 [ 70.710419] BUG: Bad rss-counter state mm:000000000942f6bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53043' (ECDSA) to the list of known hosts. 2023/06/19 21:48:54 fuzzer started 2023/06/19 21:48:54 dialing manager at localhost:44161 2023/06/19 21:48:54 checking machine... 2023/06/19 21:48:54 checking revisions... [ 71.351555] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:48:54 testing simple program... [ 71.404882] cgroup: Unknown subsys name 'net' [ 71.442305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff88800f517210 RDX=1ffff11001ea2e39 RSI=ffffffff813ad6d0 RDI=ffff88800f517170 RBP=ffff88800f5171c8 RSP=ffff88800f517100 R8 =0000000000000001 R9 =ffff88800f5171b0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f517238 R13=0000000000000000 R14=ffff888010243680 R15=ffff88800f517170 RIP=ffffffff8113062c 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 00007fd7f8bb9900 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=00007fd7f80e2038 CR3=00000000094c4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=515b9380eea2820700000000000ae988 XMM05=841370f461c55a59000000000013dd48 XMM06=c291bd5c70af25b9000000000013cb38 XMM07=fb795ef6d6577056000000000012d2b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ff37a90cfef RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019df0001 RSI=ffff888019deff58 RDI=ffff888019deffd8 RBP=ffff888019def580 RSP=ffff888019def4b0 R8 =ffffffff864b9d5a R9 =ffff888019def568 R10=0000000000038001 R11=00000000000b6996 R12=ffff888019def588 R13=ffff888019def570 R14=ffff888019deff58 R15=ffff888019def528 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007ff379ac9700 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=00007ffea654c000 CR3=000000001448c000 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=2033353a38343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a38343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000