syzkaller login: [ 30.922819] BUG: Bad rss-counter state mm:00000000405cde3e type:MM_FILEPAGES val:33 [ 30.923873] BUG: Bad rss-counter state mm:00000000405cde3e type:MM_ANONPAGES val:22 [ 31.102675] ================================================================== [ 31.103382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.104086] Read of size 8 at addr ffff88800ba48968 by task sshd/220 [ 31.104676] [ 31.104843] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.105493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.106234] Call Trace: [ 31.106490] [ 31.106702] dump_stack_lvl+0x91/0xf0 [ 31.107121] print_report+0xcc/0x620 [ 31.107509] ? __virt_addr_valid+0x102/0x340 [ 31.107925] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108845] kasan_report+0xbe/0xf0 [ 31.109207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109680] vma_interval_tree_remove+0xc75/0xec0 [ 31.110139] vma_prepare+0xc54/0x11a0 [ 31.110523] __split_vma+0x5af/0x950 [ 31.110876] ? __pfx___split_vma+0x10/0x10 [ 31.111275] ? find_held_lock+0x2c/0x110 [ 31.111667] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.112090] ? lock_is_held_type+0x9f/0x120 [ 31.112502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.112967] ? mtree_range_walk+0x632/0x900 [ 31.113389] ? mas_walk+0x5c7/0x7c0 [ 31.113754] do_vmi_munmap+0x1f1/0x2b0 [ 31.114131] mmap_region+0x1f9/0x2660 [ 31.114506] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.114898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.115437] ? __pfx_lock_acquire+0x10/0x10 [ 31.115843] ? __pfx_mmap_region+0x10/0x10 [ 31.116248] ? security_mmap_addr+0x7d/0xa0 [ 31.116655] ? get_unmapped_area+0x1f5/0x3f0 [ 31.117077] do_mmap+0x854/0xf00 [ 31.117414] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.117791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.118221] ksys_mmap_pgoff+0x3af/0x500 [ 31.118620] do_syscall_64+0x3f/0x90 [ 31.118988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119483] RIP: 0033:0x7ff687523d82 [ 31.119830] 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 [ 31.121447] RSP: 002b:00007ffce65b82d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.122143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff687523d82 [ 31.122805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff68695d000 [ 31.123443] RBP: 00007ff68695d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.124079] R10: 0000000000000812 R11: 0000000000000206 R12: 000055648407dec0 [ 31.124716] R13: 00007ffce65b82f0 R14: 00007ffce65b8320 R15: 00007ffce65b8680 [ 31.125355] [ 31.125573] [ 31.125732] Allocated by task 213: [ 31.126060] kasan_save_stack+0x22/0x50 [ 31.126451] kasan_set_track+0x25/0x30 [ 31.126826] __kasan_slab_alloc+0x59/0x70 [ 31.127223] kmem_cache_alloc+0x16b/0x370 [ 31.127614] vm_area_dup+0x20/0x160 [ 31.127960] __split_vma+0x170/0x950 [ 31.128311] split_vma+0xc6/0x110 [ 31.128648] mprotect_fixup+0x8d2/0xb30 [ 31.129030] do_mprotect_pkey+0x87e/0xd40 [ 31.129429] __x64_sys_mprotect+0x78/0xc0 [ 31.129824] do_syscall_64+0x3f/0x90 [ 31.130184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131014] [ 31.131298] Freed by task 213: [ 31.131809] kasan_save_stack+0x22/0x50 [ 31.132462] kasan_set_track+0x25/0x30 [ 31.133104] kasan_save_free_info+0x2b/0x50 [ 31.133794] __kasan_slab_free+0x10a/0x190 [ 31.134503] kmem_cache_free+0x10d/0x4d0 [ 31.135164] rcu_core+0x8c8/0x2860 [ 31.135739] __do_softirq+0x1b7/0x7d4 [ 31.136357] [ 31.136636] Last potentially related work creation: [ 31.137396] kasan_save_stack+0x22/0x50 [ 31.138050] __kasan_record_aux_stack+0x8e/0xa0 [ 31.138774] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.139495] remove_vma+0x139/0x170 [ 31.140012] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.140641] do_vmi_munmap+0x1f1/0x2b0 [ 31.141184] __vm_munmap+0x138/0x3a0 [ 31.141710] __x64_sys_munmap+0x59/0x80 [ 31.142268] do_syscall_64+0x3f/0x90 [ 31.142815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.143544] [ 31.143786] The buggy address belongs to the object at ffff88800ba48910 [ 31.143786] which belongs to the cache vm_area_struct of size 168 [ 31.145453] The buggy address is located 88 bytes inside of [ 31.145453] freed 168-byte region [ffff88800ba48910, ffff88800ba489b8) [ 31.147061] [ 31.147306] The buggy address belongs to the physical page: [ 31.148048] page:00000000227e241c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba48 [ 31.149281] memcg:ffff88800e44ce01 [ 31.149764] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.150499] page_type: 0xffffffff() [ 31.151013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.152079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e44ce01 [ 31.153118] page dumped because: kasan: bad access detected [ 31.153871] [ 31.154117] Memory state around the buggy address: [ 31.154794] ffff88800ba48800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.155778] ffff88800ba48880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.156755] >ffff88800ba48900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.157729] ^ [ 31.158640] ffff88800ba48980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.159614] ffff88800ba48a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.160579] ================================================================== [ 31.161679] Disabling lock debugging due to kernel taint [ 33.417240] BUG: Bad rss-counter state mm:00000000ad4f1e8a type:MM_FILEPAGES val:33 [ 33.418664] BUG: Bad rss-counter state mm:00000000ad4f1e8a type:MM_ANONPAGES val:22 [ 33.891000] BUG: Bad rss-counter state mm:00000000a61ea959 type:MM_FILEPAGES val:33 [ 33.891742] BUG: Bad rss-counter state mm:00000000a61ea959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61197' (ECDSA) to the list of known hosts. 2023/06/20 11:18:43 fuzzer started 2023/06/20 11:18:43 dialing manager at localhost:36067 2023/06/20 11:18:43 checking machine... 2023/06/20 11:18:43 checking revisions... [ 34.586508] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:18:43 testing simple program... [ 34.635155] cgroup: Unknown subsys name 'net' [ 34.698192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:18:43 Registers: info registers vcpu 0 RAX=ffff8880147c8001 RBX=ffff8880147c7828 RCX=0000000000000001 RDX=ffff8880147c7b01 RSI=ffff8880147c7b80 RDI=ffff8880147c7838 RBP=ffff8880147c7b80 RSP=ffff8880147c7780 R8 =0000000000000001 R9 =ffff8880147c7868 R10=0000000000038001 R11=0000000000020ed2 R12=0000000000000008 R13=ffff8880147c0000 R14=ffff8880147c7b80 R15=ffff8880147c7828 RIP=ffffffff811304c9 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2e6bb71900 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=00007f2e6bb2a008 CR3=000000000d6e8000 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=00007f9adb07ebc0 CR3=00000000099d8000 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=2032343a38313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a38313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000