syzkaller login: [ 61.034710] BUG: Bad rss-counter state mm:00000000e4f3cbbe type:MM_FILEPAGES val:33 [ 61.036088] BUG: Bad rss-counter state mm:00000000e4f3cbbe type:MM_ANONPAGES val:22 [ 61.118279] ================================================================== [ 61.119288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.120276] Read of size 8 at addr ffff88800dde2058 by task sshd/220 [ 61.121186] [ 61.121422] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.122342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.123377] Call Trace: [ 61.123715] [ 61.124019] dump_stack_lvl+0x91/0xf0 [ 61.124544] print_report+0xcc/0x620 [ 61.125059] ? __virt_addr_valid+0x102/0x340 [ 61.125641] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.126301] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.126968] kasan_report+0xbe/0xf0 [ 61.127491] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.128179] vma_interval_tree_remove+0xc75/0xec0 [ 61.128848] vma_prepare+0xc54/0x11a0 [ 61.129377] __split_vma+0x5af/0x950 [ 61.129916] ? __pfx___split_vma+0x10/0x10 [ 61.130498] ? find_held_lock+0x2c/0x110 [ 61.131075] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.131696] ? lock_is_held_type+0x9f/0x120 [ 61.132294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.132962] ? mtree_range_walk+0x632/0x900 [ 61.133577] ? mas_walk+0x5c7/0x7c0 [ 61.134107] do_vmi_munmap+0x1f1/0x2b0 [ 61.134656] mmap_region+0x1f9/0x2660 [ 61.135193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.135759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.136548] ? __pfx_lock_acquire+0x10/0x10 [ 61.137139] ? __pfx_mmap_region+0x10/0x10 [ 61.137732] ? security_mmap_addr+0x7d/0xa0 [ 61.138324] ? get_unmapped_area+0x1f5/0x3f0 [ 61.138935] do_mmap+0x854/0xf00 [ 61.139423] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.139967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.140592] ksys_mmap_pgoff+0x3af/0x500 [ 61.141155] do_syscall_64+0x3f/0x90 [ 61.141702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.142419] RIP: 0033:0x7f1ac3f41d82 [ 61.142925] 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 [ 61.145296] RSP: 002b:00007ffe00a3b938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.146304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ac3f41d82 [ 61.147250] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ac337b000 [ 61.148188] RBP: 00007f1ac337b000 R08: 0000000000000009 R09: 0000000000001000 [ 61.149128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae902c2b20 [ 61.150078] R13: 00007ffe00a3b950 R14: 00007ffe00a3b980 R15: 00007ffe00a3bce0 [ 61.151028] [ 61.151350] [ 61.151583] Allocated by task 213: [ 61.152051] kasan_save_stack+0x22/0x50 [ 61.152604] kasan_set_track+0x25/0x30 [ 61.153143] __kasan_slab_alloc+0x59/0x70 [ 61.153719] kmem_cache_alloc+0x16b/0x370 [ 61.154284] vm_area_dup+0x20/0x160 [ 61.154782] __split_vma+0x170/0x950 [ 61.155292] split_vma+0xc6/0x110 [ 61.155771] mprotect_fixup+0x8d2/0xb30 [ 61.156323] do_mprotect_pkey+0x87e/0xd40 [ 61.156894] __x64_sys_mprotect+0x78/0xc0 [ 61.157459] do_syscall_64+0x3f/0x90 [ 61.157993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.158705] [ 61.158939] Freed by task 213: [ 61.159368] kasan_save_stack+0x22/0x50 [ 61.159919] kasan_set_track+0x25/0x30 [ 61.160448] kasan_save_free_info+0x2b/0x50 [ 61.161031] __kasan_slab_free+0x10a/0x190 [ 61.161616] kmem_cache_free+0x10d/0x4d0 [ 61.162257] rcu_core+0x8c8/0x2860 [ 61.162719] __do_softirq+0x1b7/0x7d4 [ 61.163210] [ 61.163427] Last potentially related work creation: [ 61.164014] kasan_save_stack+0x22/0x50 [ 61.164522] __kasan_record_aux_stack+0x8e/0xa0 [ 61.165102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.165778] remove_vma+0x139/0x170 [ 61.166247] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.166817] do_vmi_munmap+0x1f1/0x2b0 [ 61.167305] __vm_munmap+0x138/0x3a0 [ 61.167779] __x64_sys_munmap+0x59/0x80 [ 61.168283] do_syscall_64+0x3f/0x90 [ 61.168762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.169409] [ 61.169629] The buggy address belongs to the object at ffff88800dde2000 [ 61.169629] which belongs to the cache vm_area_struct of size 168 [ 61.171102] The buggy address is located 88 bytes inside of [ 61.171102] freed 168-byte region [ffff88800dde2000, ffff88800dde20a8) [ 61.172514] [ 61.172738] The buggy address belongs to the physical page: [ 61.173407] page:00000000ade0fb32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde2 [ 61.174505] memcg:ffff88800e529001 [ 61.174932] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.175576] page_type: 0xffffffff() [ 61.176027] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 61.176966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e529001 [ 61.177892] page dumped because: kasan: bad access detected [ 61.178546] [ 61.178769] Memory state around the buggy address: [ 61.179345] ffff88800dde1f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 61.180197] ffff88800dde1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.181054] >ffff88800dde2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.181910] ^ [ 61.182641] ffff88800dde2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.183503] ffff88800dde2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.184367] ================================================================== [ 61.185614] Disabling lock debugging due to kernel taint [ 63.074907] BUG: Bad rss-counter state mm:000000006f4d9f3a type:MM_FILEPAGES val:33 [ 63.076142] BUG: Bad rss-counter state mm:000000006f4d9f3a type:MM_ANONPAGES val:22 [ 63.526597] BUG: Bad rss-counter state mm:00000000c775cd9f type:MM_FILEPAGES val:33 [ 63.527508] BUG: Bad rss-counter state mm:00000000c775cd9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40369' (ECDSA) to the list of known hosts. 2023/06/20 23:56:17 fuzzer started 2023/06/20 23:56:18 dialing manager at localhost:36067 2023/06/20 23:56:18 checking machine... 2023/06/20 23:56:18 checking revisions... [ 64.243906] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:56:18 testing simple program... [ 64.287869] cgroup: Unknown subsys name 'net' [ 64.327001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:56:17 Registers: info registers vcpu 0 RAX=1ffffffff0bb1340 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff8880165d7050 R8 =ffffffff8608a556 R9 =ffff8880165d7198 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f2d6b4f4900 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=00007f2d6b4d3020 CR3=000000000daf4000 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=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 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=0000000000000001 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=00007f0948df2600 CR3=0000000016410000 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=2037313a36353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a36353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000