syzkaller login: [ 29.614454] BUG: Bad rss-counter state mm:000000008e2675d9 type:MM_FILEPAGES val:33 [ 29.615613] BUG: Bad rss-counter state mm:000000008e2675d9 type:MM_ANONPAGES val:22 [ 29.654328] ================================================================== [ 29.655221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.656146] Read of size 8 at addr ffff88800f2e36b0 by task sshd/220 [ 29.656906] [ 29.657124] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.658002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.658963] Call Trace: [ 29.659281] [ 29.659561] dump_stack_lvl+0x91/0xf0 [ 29.660049] print_report+0xcc/0x620 [ 29.660528] ? __virt_addr_valid+0x102/0x340 [ 29.661075] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.661700] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.662305] kasan_report+0xbe/0xf0 [ 29.662776] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.663400] vma_interval_tree_remove+0xc75/0xec0 [ 29.663992] vma_prepare+0xc54/0x11a0 [ 29.664473] __split_vma+0x5af/0x950 [ 29.664944] ? __pfx___split_vma+0x10/0x10 [ 29.665471] ? find_held_lock+0x2c/0x110 [ 29.666007] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.666568] ? lock_is_held_type+0x9f/0x120 [ 29.667100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.667700] ? mtree_range_walk+0x632/0x900 [ 29.668243] ? mas_walk+0x5c7/0x7c0 [ 29.668712] do_vmi_munmap+0x1f1/0x2b0 [ 29.669210] mmap_region+0x1f9/0x2660 [ 29.669713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.670234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.670936] ? __pfx_lock_acquire+0x10/0x10 [ 29.671468] ? __pfx_mmap_region+0x10/0x10 [ 29.672120] ? security_mmap_addr+0x7d/0xa0 [ 29.672656] ? get_unmapped_area+0x1f5/0x3f0 [ 29.673209] do_mmap+0x854/0xf00 [ 29.673660] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.674150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.674704] ksys_mmap_pgoff+0x3af/0x500 [ 29.675208] do_syscall_64+0x3f/0x90 [ 29.675679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.676323] RIP: 0033:0x7f6e94eadd82 [ 29.676779] 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 [ 29.679137] RSP: 002b:00007ffff366cfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.680192] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e94eadd82 [ 29.681126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e942e7000 [ 29.681977] RBP: 00007f6e942e7000 R08: 0000000000000009 R09: 0000000000001000 [ 29.682811] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf16babec0 [ 29.683654] R13: 00007ffff366d000 R14: 00007ffff366d030 R15: 00007ffff366d390 [ 29.684505] [ 29.684795] [ 29.685008] Allocated by task 213: [ 29.685434] kasan_save_stack+0x22/0x50 [ 29.685949] kasan_set_track+0x25/0x30 [ 29.686442] __kasan_slab_alloc+0x59/0x70 [ 29.686966] kmem_cache_alloc+0x16b/0x370 [ 29.687476] vm_area_dup+0x20/0x160 [ 29.687923] __split_vma+0x170/0x950 [ 29.688384] split_vma+0xc6/0x110 [ 29.688826] mprotect_fixup+0x8d2/0xb30 [ 29.689321] do_mprotect_pkey+0x87e/0xd40 [ 29.689854] __x64_sys_mprotect+0x78/0xc0 [ 29.690373] do_syscall_64+0x3f/0x90 [ 29.690921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.691560] [ 29.691772] Freed by task 13: [ 29.692152] kasan_save_stack+0x22/0x50 [ 29.692649] kasan_set_track+0x25/0x30 [ 29.693135] kasan_save_free_info+0x2b/0x50 [ 29.693666] __kasan_slab_free+0x10a/0x190 [ 29.694188] kmem_cache_free+0x10d/0x4d0 [ 29.694692] rcu_core+0x8c8/0x2860 [ 29.695132] __do_softirq+0x1b7/0x7d4 [ 29.695601] [ 29.695814] Last potentially related work creation: [ 29.696391] kasan_save_stack+0x22/0x50 [ 29.696895] __kasan_record_aux_stack+0x8e/0xa0 [ 29.697469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.698126] remove_vma+0x139/0x170 [ 29.698572] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.699128] do_vmi_munmap+0x1f1/0x2b0 [ 29.699607] __vm_munmap+0x138/0x3a0 [ 29.700073] __x64_sys_munmap+0x59/0x80 [ 29.700563] do_syscall_64+0x3f/0x90 [ 29.701035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.701684] [ 29.701897] Second to last potentially related work creation: [ 29.702572] kasan_save_stack+0x22/0x50 [ 29.703071] __kasan_record_aux_stack+0x8e/0xa0 [ 29.703639] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.704275] remove_vma+0x139/0x170 [ 29.704725] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.705280] do_vmi_munmap+0x1f1/0x2b0 [ 29.705768] __vm_munmap+0x138/0x3a0 [ 29.706235] __x64_sys_munmap+0x59/0x80 [ 29.706732] do_syscall_64+0x3f/0x90 [ 29.707203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.707838] [ 29.708050] The buggy address belongs to the object at ffff88800f2e3658 [ 29.708050] which belongs to the cache vm_area_struct of size 168 [ 29.709494] The buggy address is located 88 bytes inside of [ 29.709494] freed 168-byte region [ffff88800f2e3658, ffff88800f2e3700) [ 29.710907] [ 29.711120] The buggy address belongs to the physical page: [ 29.711776] page:00000000731c378c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2e3 [ 29.712850] memcg:ffff888019fa7101 [ 29.713269] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.713913] page_type: 0xffffffff() [ 29.714363] raw: 0100000000000200 ffff88800879fc80 ffffea0000387580 dead000000000004 [ 29.715431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fa7101 [ 29.716348] page dumped because: kasan: bad access detected [ 29.717012] [ 29.717224] Memory state around the buggy address: [ 29.717820] ffff88800f2e3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.718667] ffff88800f2e3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.719513] >ffff88800f2e3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.720367] ^ [ 29.720943] ffff88800f2e3700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.721806] ffff88800f2e3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.722660] ================================================================== [ 29.723700] Disabling lock debugging due to kernel taint [ 31.950067] BUG: Bad rss-counter state mm:00000000e19bfccb type:MM_FILEPAGES val:33 [ 31.951276] BUG: Bad rss-counter state mm:00000000e19bfccb type:MM_ANONPAGES val:22 [ 32.332488] BUG: Bad rss-counter state mm:00000000e76bc04e type:MM_FILEPAGES val:33 [ 32.333522] BUG: Bad rss-counter state mm:00000000e76bc04e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47387' (ECDSA) to the list of known hosts. 2023/06/19 17:38:34 fuzzer started 2023/06/19 17:38:35 dialing manager at localhost:44161 2023/06/19 17:38:35 checking machine... 2023/06/19 17:38:35 checking revisions... [ 33.055591] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:38:35 testing simple program... [ 33.100035] cgroup: Unknown subsys name 'net' [ 33.151154] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:38:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007faf080433d0 CR3=0000000010078000 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=2034333a38333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=1ffff1100394efca RCX=ffffffff817330d0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801660dc80 RSP=ffff88801ca77e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000001 R15=ffff88801660dc80 RIP=ffffffff814c01d0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4997ec0900 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=00007f4998474ae8 CR3=0000000016972000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000