syzkaller login: [ 31.133920] BUG: Bad rss-counter state mm:000000004cf6b439 type:MM_FILEPAGES val:33 [ 31.135910] BUG: Bad rss-counter state mm:000000004cf6b439 type:MM_ANONPAGES val:22 [ 31.294888] ================================================================== [ 31.295927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.296875] Read of size 8 at addr ffff88800e24ba50 by task sshd/221 [ 31.297772] [ 31.298034] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.298945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.300211] Call Trace: [ 31.300632] [ 31.300990] dump_stack_lvl+0x91/0xf0 [ 31.301635] print_report+0xcc/0x620 [ 31.302270] ? __virt_addr_valid+0x102/0x340 [ 31.302984] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303789] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304574] kasan_report+0xbe/0xf0 [ 31.305209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306030] vma_interval_tree_remove+0xc75/0xec0 [ 31.306868] vma_prepare+0xc54/0x11a0 [ 31.307516] __split_vma+0x5af/0x950 [ 31.308153] ? __pfx___split_vma+0x10/0x10 [ 31.308851] ? find_held_lock+0x2c/0x110 [ 31.309517] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310262] ? lock_is_held_type+0x9f/0x120 [ 31.310993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.311785] ? mtree_range_walk+0x632/0x900 [ 31.312484] ? mas_walk+0x5c7/0x7c0 [ 31.313115] do_vmi_munmap+0x1f1/0x2b0 [ 31.313765] mmap_region+0x1f9/0x2660 [ 31.314407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.315090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.316040] ? __pfx_lock_acquire+0x10/0x10 [ 31.316748] ? __pfx_mmap_region+0x10/0x10 [ 31.317457] ? security_mmap_addr+0x7d/0xa0 [ 31.318171] ? get_unmapped_area+0x1f5/0x3f0 [ 31.318907] do_mmap+0x854/0xf00 [ 31.319488] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.320139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.320856] ksys_mmap_pgoff+0x3af/0x500 [ 31.321538] do_syscall_64+0x3f/0x90 [ 31.322165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323024] RIP: 0033:0x7f16ae384d82 [ 31.323495] 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 [ 31.325638] RSP: 002b:00007ffe15bb8678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.326583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16ae384d82 [ 31.327480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16ad7be000 [ 31.328342] RBP: 00007f16ad7be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.329210] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595de30dd90 [ 31.330095] R13: 00007ffe15bb8690 R14: 00007ffe15bb86c0 R15: 00007ffe15bb8a20 [ 31.330979] [ 31.331278] [ 31.331498] Allocated by task 214: [ 31.331950] kasan_save_stack+0x22/0x50 [ 31.332460] kasan_set_track+0x25/0x30 [ 31.332965] __kasan_slab_alloc+0x59/0x70 [ 31.333494] kmem_cache_alloc+0x16b/0x370 [ 31.334041] vm_area_dup+0x20/0x160 [ 31.334498] __split_vma+0x170/0x950 [ 31.335000] split_vma+0xc6/0x110 [ 31.335450] mprotect_fixup+0x8d2/0xb30 [ 31.335971] do_mprotect_pkey+0x87e/0xd40 [ 31.336496] __x64_sys_mprotect+0x78/0xc0 [ 31.337024] do_syscall_64+0x3f/0x90 [ 31.337503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338196] [ 31.338429] Freed by task 19: [ 31.338838] kasan_save_stack+0x22/0x50 [ 31.339359] kasan_set_track+0x25/0x30 [ 31.339878] kasan_save_free_info+0x2b/0x50 [ 31.340408] __kasan_slab_free+0x10a/0x190 [ 31.340985] kmem_cache_free+0x10d/0x4d0 [ 31.341621] rcu_core+0x8c8/0x2860 [ 31.342095] __do_softirq+0x1b7/0x7d4 [ 31.342570] [ 31.342796] Last potentially related work creation: [ 31.343391] kasan_save_stack+0x22/0x50 [ 31.343914] __kasan_record_aux_stack+0x8e/0xa0 [ 31.344485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.345147] remove_vma+0x139/0x170 [ 31.345602] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.346234] do_vmi_munmap+0x1f1/0x2b0 [ 31.346914] __vm_munmap+0x138/0x3a0 [ 31.347424] __x64_sys_munmap+0x59/0x80 [ 31.347944] do_syscall_64+0x3f/0x90 [ 31.348423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349093] [ 31.349306] The buggy address belongs to the object at ffff88800e24b9f8 [ 31.349306] which belongs to the cache vm_area_struct of size 168 [ 31.350837] The buggy address is located 88 bytes inside of [ 31.350837] freed 168-byte region [ffff88800e24b9f8, ffff88800e24baa0) [ 31.352274] [ 31.352493] The buggy address belongs to the physical page: [ 31.353169] page:00000000a1cd494b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24b [ 31.354287] memcg:ffff88800d73b001 [ 31.354714] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.355380] page_type: 0xffffffff() [ 31.355845] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.356773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d73b001 [ 31.357698] page dumped because: kasan: bad access detected [ 31.358383] [ 31.358602] Memory state around the buggy address: [ 31.359212] ffff88800e24b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.360074] ffff88800e24b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.360919] >ffff88800e24ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.361772] ^ [ 31.362471] ffff88800e24ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.363327] ffff88800e24bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.364173] ================================================================== [ 31.365161] Disabling lock debugging due to kernel taint [ 34.177612] BUG: Bad rss-counter state mm:00000000e24abde1 type:MM_FILEPAGES val:33 [ 34.178757] BUG: Bad rss-counter state mm:00000000e24abde1 type:MM_ANONPAGES val:22 [ 34.561876] BUG: Bad rss-counter state mm:0000000047c20f58 type:MM_FILEPAGES val:33 [ 34.562771] BUG: Bad rss-counter state mm:0000000047c20f58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8158' (ECDSA) to the list of known hosts. 2023/06/20 20:14:54 fuzzer started 2023/06/20 20:14:55 dialing manager at localhost:36067 2023/06/20 20:14:55 checking machine... 2023/06/20 20:14:55 checking revisions... [ 35.292185] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:14:55 testing simple program... [ 35.345368] cgroup: Unknown subsys name 'net' [ 35.399147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:54 Registers: info registers vcpu 0 RAX=ffffea0000554400 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801468fa01 RSI=ffff88801468fac0 RDI=ffff88801468fac0 RBP=ffff88801468f678 RSP=ffff88801468f5b0 R8 =0000000000000001 R9 =ffff88801468f660 R10=0000000000038001 R11=00000000000246e9 R12=ffff88801468f680 R13=ffff88801468f668 R14=ffff88801468fac0 R15=ffff88801468f620 RIP=ffffffff81131236 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f58f4ec6900 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=00007f58f4359a50 CR3=000000000d8fe000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bb352b98ef8f58b000000000000ae988 XMM05=cc6d0ab618b85a100000000000132a58 XMM06=c291bd5c70af25b90000000000131848 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f2325000338 CR3=000000000d79e000 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=2034353a34313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000