syzkaller login: [ 30.954488] BUG: Bad rss-counter state mm:000000007145f9f1 type:MM_FILEPAGES val:33 [ 30.956318] BUG: Bad rss-counter state mm:000000007145f9f1 type:MM_ANONPAGES val:22 [ 31.117201] ================================================================== [ 31.118584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.119728] Read of size 8 at addr ffff88800e679310 by task sshd/220 [ 31.120625] [ 31.120880] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.121897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.123076] Call Trace: [ 31.123458] [ 31.123802] dump_stack_lvl+0x91/0xf0 [ 31.124387] print_report+0xcc/0x620 [ 31.124958] ? __virt_addr_valid+0x102/0x340 [ 31.125617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.126398] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.127132] kasan_report+0xbe/0xf0 [ 31.127703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.128439] vma_interval_tree_remove+0xc75/0xec0 [ 31.129153] vma_prepare+0xc54/0x11a0 [ 31.129725] __split_vma+0x5af/0x950 [ 31.130312] ? __pfx___split_vma+0x10/0x10 [ 31.130946] ? find_held_lock+0x2c/0x110 [ 31.131483] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.131829] ? lock_is_held_type+0x9f/0x120 [ 31.132157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.132531] ? mtree_range_walk+0x632/0x900 [ 31.132860] ? mas_walk+0x5c7/0x7c0 [ 31.133145] do_vmi_munmap+0x1f1/0x2b0 [ 31.133436] mmap_region+0x1f9/0x2660 [ 31.133725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.134033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.134464] ? __pfx_lock_acquire+0x10/0x10 [ 31.134795] ? __pfx_mmap_region+0x10/0x10 [ 31.135104] ? security_mmap_addr+0x7d/0xa0 [ 31.135403] ? get_unmapped_area+0x1f5/0x3f0 [ 31.135714] do_mmap+0x854/0xf00 [ 31.135964] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.136250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.136570] ksys_mmap_pgoff+0x3af/0x500 [ 31.136859] do_syscall_64+0x3f/0x90 [ 31.137131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137504] RIP: 0033:0x7fc4c52b3d82 [ 31.137767] 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 [ 31.138982] RSP: 002b:00007ffc9101e798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.139496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4c52b3d82 [ 31.139982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4c46ed000 [ 31.140466] RBP: 00007fc4c46ed000 R08: 0000000000000009 R09: 0000000000001000 [ 31.140951] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b34ccfd90 [ 31.141434] R13: 00007ffc9101e7b0 R14: 00007ffc9101e7e0 R15: 00007ffc9101eb40 [ 31.141927] [ 31.142097] [ 31.142228] Allocated by task 213: [ 31.142476] kasan_save_stack+0x22/0x50 [ 31.142765] kasan_set_track+0x25/0x30 [ 31.143047] __kasan_slab_alloc+0x59/0x70 [ 31.143348] kmem_cache_alloc+0x16b/0x370 [ 31.143642] vm_area_dup+0x20/0x160 [ 31.143904] __split_vma+0x170/0x950 [ 31.144171] split_vma+0xc6/0x110 [ 31.144422] mprotect_fixup+0x8d2/0xb30 [ 31.144718] do_mprotect_pkey+0x87e/0xd40 [ 31.145015] __x64_sys_mprotect+0x78/0xc0 [ 31.145316] do_syscall_64+0x3f/0x90 [ 31.145591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145960] [ 31.146088] Freed by task 213: [ 31.146322] kasan_save_stack+0x22/0x50 [ 31.146613] kasan_set_track+0x25/0x30 [ 31.146916] kasan_save_free_info+0x2b/0x50 [ 31.147254] __kasan_slab_free+0x10a/0x190 [ 31.147570] kmem_cache_free+0x10d/0x4d0 [ 31.147862] rcu_core+0x8c8/0x2860 [ 31.148126] __do_softirq+0x1b7/0x7d4 [ 31.148425] [ 31.148559] Last potentially related work creation: [ 31.148925] kasan_save_stack+0x22/0x50 [ 31.149212] __kasan_record_aux_stack+0x8e/0xa0 [ 31.149538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.149898] remove_vma+0x139/0x170 [ 31.150156] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.150485] do_vmi_munmap+0x1f1/0x2b0 [ 31.150762] __vm_munmap+0x138/0x3a0 [ 31.151029] __x64_sys_munmap+0x59/0x80 [ 31.151330] do_syscall_64+0x3f/0x90 [ 31.151622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152012] [ 31.152141] The buggy address belongs to the object at ffff88800e6792b8 [ 31.152141] which belongs to the cache vm_area_struct of size 168 [ 31.153031] The buggy address is located 88 bytes inside of [ 31.153031] freed 168-byte region [ffff88800e6792b8, ffff88800e679360) [ 31.153899] [ 31.154025] The buggy address belongs to the physical page: [ 31.154445] page:000000006be4114c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe679 [ 31.155085] memcg:ffff8880097d5001 [ 31.155340] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.155738] page_type: 0xffffffff() [ 31.156008] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.156561] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d5001 [ 31.157120] page dumped because: kasan: bad access detected [ 31.157518] [ 31.157645] Memory state around the buggy address: [ 31.158003] ffff88800e679200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.158519] ffff88800e679280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.159046] >ffff88800e679300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.159569] ^ [ 31.159851] ffff88800e679380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.160350] ffff88800e679400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.160881] ================================================================== [ 31.161593] Disabling lock debugging due to kernel taint [ 32.896960] BUG: Bad rss-counter state mm:00000000362c1a36 type:MM_FILEPAGES val:33 [ 32.898150] BUG: Bad rss-counter state mm:00000000362c1a36 type:MM_ANONPAGES val:22 [ 33.278643] BUG: Bad rss-counter state mm:000000009755aaaf type:MM_FILEPAGES val:33 [ 33.279654] BUG: Bad rss-counter state mm:000000009755aaaf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52167' (ECDSA) to the list of known hosts. 2023/06/21 10:49:11 fuzzer started 2023/06/21 10:49:11 dialing manager at localhost:36067 2023/06/21 10:49:11 checking machine... 2023/06/21 10:49:11 checking revisions... [ 34.108091] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:49:11 testing simple program... [ 34.152752] cgroup: Unknown subsys name 'net' [ 34.215169] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:10 Registers: info registers vcpu 0 RAX=1ffff1100206de13 RBX=ffffffff813ad470 RCX=ffff88801036f0f0 RDX=ffff888010370000 RSI=ffff88801036f0e8 RDI=ffff88801036f060 RBP=ffff88801036f0e8 RSP=ffff88801036f050 R8 =0000000000000001 R9 =ffff88801036f090 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801036f118 R13=0000000000000000 R14=ffff8880167fb680 R15=0000000000000000 RIP=ffffffff810bd033 RFL=00000286 [--S--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 00007fc96d0fb900 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=00007fc96d0da020 CR3=000000000e7e4000 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=00007fca2a5eb730 CR3=000000000d9b2000 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=2030313a39343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000