syzkaller login: [ 30.903808] BUG: Bad rss-counter state mm:00000000b9f34dca type:MM_FILEPAGES val:33 [ 30.904646] BUG: Bad rss-counter state mm:00000000b9f34dca type:MM_ANONPAGES val:22 [ 30.935534] ================================================================== [ 30.936311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.937057] Read of size 8 at addr ffff88800e6b0310 by task sshd/220 [ 30.937673] [ 30.937884] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.938500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.939316] Call Trace: [ 30.939543] [ 30.939840] dump_stack_lvl+0x91/0xf0 [ 30.940193] print_report+0xcc/0x620 [ 30.940535] ? __virt_addr_valid+0x102/0x340 [ 30.940936] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941807] kasan_report+0xbe/0xf0 [ 30.942144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942578] vma_interval_tree_remove+0xc75/0xec0 [ 30.942998] vma_prepare+0xc54/0x11a0 [ 30.943340] __split_vma+0x5af/0x950 [ 30.943673] ? __pfx___split_vma+0x10/0x10 [ 30.944048] ? find_held_lock+0x2c/0x110 [ 30.944417] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.944837] ? lock_is_held_type+0x9f/0x120 [ 30.945219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.945655] ? mtree_range_walk+0x632/0x900 [ 30.946048] ? mas_walk+0x5c7/0x7c0 [ 30.946387] do_vmi_munmap+0x1f1/0x2b0 [ 30.946731] mmap_region+0x1f9/0x2660 [ 30.947074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.947440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.947936] ? __pfx_lock_acquire+0x10/0x10 [ 30.948307] ? __pfx_mmap_region+0x10/0x10 [ 30.948691] ? security_mmap_addr+0x7d/0xa0 [ 30.949069] ? get_unmapped_area+0x1f5/0x3f0 [ 30.949455] do_mmap+0x854/0xf00 [ 30.949765] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.950117] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.950516] ksys_mmap_pgoff+0x3af/0x500 [ 30.950873] do_syscall_64+0x3f/0x90 [ 30.951211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951666] RIP: 0033:0x7ffa3f866d82 [ 30.951995] 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 [ 30.953487] RSP: 002b:00007fff77613278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.954111] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa3f866d82 [ 30.954716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa3eca0000 [ 30.955311] RBP: 00007ffa3eca0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.955904] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624494afb20 [ 30.956496] R13: 00007fff77613290 R14: 00007fff776132c0 R15: 00007fff77613620 [ 30.957126] [ 30.957334] [ 30.957488] Allocated by task 213: [ 30.957792] kasan_save_stack+0x22/0x50 [ 30.958151] kasan_set_track+0x25/0x30 [ 30.958497] __kasan_slab_alloc+0x59/0x70 [ 30.958865] kmem_cache_alloc+0x16b/0x370 [ 30.959232] vm_area_dup+0x20/0x160 [ 30.959555] __split_vma+0x170/0x950 [ 30.959883] split_vma+0xc6/0x110 [ 30.960193] mprotect_fixup+0x8d2/0xb30 [ 30.960544] do_mprotect_pkey+0x87e/0xd40 [ 30.960922] __x64_sys_mprotect+0x78/0xc0 [ 30.961288] do_syscall_64+0x3f/0x90 [ 30.961615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.962070] [ 30.962220] Freed by task 213: [ 30.962499] kasan_save_stack+0x22/0x50 [ 30.962855] kasan_set_track+0x25/0x30 [ 30.963199] kasan_save_free_info+0x2b/0x50 [ 30.963574] __kasan_slab_free+0x10a/0x190 [ 30.963956] kmem_cache_free+0x10d/0x4d0 [ 30.964311] rcu_core+0x8c8/0x2860 [ 30.964651] __do_softirq+0x1b7/0x7d4 [ 30.964979] [ 30.965130] Last potentially related work creation: [ 30.965533] kasan_save_stack+0x22/0x50 [ 30.965891] __kasan_record_aux_stack+0x8e/0xa0 [ 30.966299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.966752] remove_vma+0x139/0x170 [ 30.967072] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.967464] do_vmi_munmap+0x1f1/0x2b0 [ 30.967803] __vm_munmap+0x138/0x3a0 [ 30.968136] __x64_sys_munmap+0x59/0x80 [ 30.968490] do_syscall_64+0x3f/0x90 [ 30.968836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.969285] [ 30.969441] Second to last potentially related work creation: [ 30.969928] kasan_save_stack+0x22/0x50 [ 30.970280] __kasan_record_aux_stack+0x8e/0xa0 [ 30.970693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.971152] remove_vma+0x139/0x170 [ 30.971475] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.971866] do_vmi_munmap+0x1f1/0x2b0 [ 30.972208] mmap_region+0x1f9/0x2660 [ 30.972542] do_mmap+0x854/0xf00 [ 30.972852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.973193] ksys_mmap_pgoff+0x3af/0x500 [ 30.973543] do_syscall_64+0x3f/0x90 [ 30.973874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974327] [ 30.974481] The buggy address belongs to the object at ffff88800e6b02b8 [ 30.974481] which belongs to the cache vm_area_struct of size 168 [ 30.975516] The buggy address is located 88 bytes inside of [ 30.975516] freed 168-byte region [ffff88800e6b02b8, ffff88800e6b0360) [ 30.976496] [ 30.976681] The buggy address belongs to the physical page: [ 30.977144] page:0000000061cdf1b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6b0 [ 30.977891] memcg:ffff88800d65e601 [ 30.978189] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.978642] page_type: 0xffffffff() [ 30.978952] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356fc0 dead000000000002 [ 30.979600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d65e601 [ 30.980235] page dumped because: kasan: bad access detected [ 30.980706] [ 30.980861] Memory state around the buggy address: [ 30.981269] ffff88800e6b0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.981870] ffff88800e6b0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.982467] >ffff88800e6b0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.983064] ^ [ 30.983388] ffff88800e6b0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.983985] ffff88800e6b0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.984575] ================================================================== [ 30.985521] Disabling lock debugging due to kernel taint [ 32.515998] BUG: Bad rss-counter state mm:000000000579338b type:MM_FILEPAGES val:33 [ 32.516759] BUG: Bad rss-counter state mm:000000000579338b type:MM_ANONPAGES val:22 [ 32.889386] BUG: Bad rss-counter state mm:00000000197d1c34 type:MM_FILEPAGES val:33 [ 32.890164] BUG: Bad rss-counter state mm:00000000197d1c34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51357' (ECDSA) to the list of known hosts. 2023/06/21 09:12:32 fuzzer started 2023/06/21 09:12:32 dialing manager at localhost:36067 2023/06/21 09:12:32 checking machine... 2023/06/21 09:12:32 checking revisions... [ 33.480067] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:12:32 testing simple program... [ 33.525225] cgroup: Unknown subsys name 'net' [ 33.574864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:12:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f9d408ce5e0 CR3=000000001031a000 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=2031333a32313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f127738 RCX=ffffffff86129a01 RDX=1ffff11001e24ee7 RSI=ffffffff8450cc7f RDI=ffff88800f127744 RBP=000000000000000a RSP=ffff88800f127650 R8 =ffffffff86129ab2 R9 =ffff88800f1276b0 R10=0000000000038001 R11=000000000001e4ed R12=ffff88800f127738 R13=0000000000000000 R14=ffff888015b19b40 R15=ffff8880084c6140 RIP=ffffffff813ad51f 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 00007f05addb5900 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=0000557b3831db88 CR3=000000000e006000 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