syzkaller login: [ 34.704963] BUG: Bad rss-counter state mm:000000008a45cfef type:MM_FILEPAGES val:33 [ 34.705962] BUG: Bad rss-counter state mm:000000008a45cfef type:MM_ANONPAGES val:22 [ 34.871396] ================================================================== [ 34.872299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.873255] Read of size 8 at addr ffff88800ee7c140 by task sshd/220 [ 34.874043] [ 34.874268] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.875272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.876237] Call Trace: [ 34.876557] <TASK> [ 34.876976] dump_stack_lvl+0x91/0xf0 [ 34.877568] print_report+0xcc/0x620 [ 34.878191] ? __virt_addr_valid+0x102/0x340 [ 34.878851] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.879608] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.880343] kasan_report+0xbe/0xf0 [ 34.880919] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.881681] vma_interval_tree_remove+0xc75/0xec0 [ 34.882468] vma_prepare+0xc54/0x11a0 [ 34.883089] __split_vma+0x5af/0x950 [ 34.883660] ? __pfx___split_vma+0x10/0x10 [ 34.884207] ? find_held_lock+0x2c/0x110 [ 34.884741] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.885328] ? lock_is_held_type+0x9f/0x120 [ 34.885880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.886544] ? mtree_range_walk+0x632/0x900 [ 34.887132] ? mas_walk+0x5c7/0x7c0 [ 34.887626] do_vmi_munmap+0x1f1/0x2b0 [ 34.888150] mmap_region+0x1f9/0x2660 [ 34.888658] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.889189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.889939] ? __pfx_lock_acquire+0x10/0x10 [ 34.890529] ? __pfx_mmap_region+0x10/0x10 [ 34.891094] ? security_mmap_addr+0x7d/0xa0 [ 34.891645] ? get_unmapped_area+0x1f5/0x3f0 [ 34.892217] do_mmap+0x854/0xf00 [ 34.892673] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.893190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.893780] ksys_mmap_pgoff+0x3af/0x500 [ 34.894348] do_syscall_64+0x3f/0x90 [ 34.894848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.895548] RIP: 0033:0x7f642c5cdd82 [ 34.896024] 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 [ 34.898302] RSP: 002b:00007ffc7b69df48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.899270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f642c5cdd82 [ 34.900154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f642ba07000 [ 34.901034] RBP: 00007f642ba07000 R08: 0000000000000009 R09: 0000000000001000 [ 34.901915] R10: 0000000000000812 R11: 0000000000000206 R12: 000055741e71dec0 [ 34.902827] R13: 00007ffc7b69df60 R14: 00007ffc7b69df90 R15: 00007ffc7b69e2f0 [ 34.903753] </TASK> [ 34.904059] [ 34.904281] Allocated by task 213: [ 34.904722] kasan_save_stack+0x22/0x50 [ 34.905264] kasan_set_track+0x25/0x30 [ 34.905777] __kasan_slab_alloc+0x59/0x70 [ 34.906363] kmem_cache_alloc+0x16b/0x370 [ 34.906910] vm_area_dup+0x20/0x160 [ 34.907401] __split_vma+0x170/0x950 [ 34.907893] split_vma+0xc6/0x110 [ 34.908353] mprotect_fixup+0x8d2/0xb30 [ 34.908870] do_mprotect_pkey+0x87e/0xd40 [ 34.909413] __x64_sys_mprotect+0x78/0xc0 [ 34.909972] do_syscall_64+0x3f/0x90 [ 34.910488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.911189] [ 34.911412] Freed by task 213: [ 34.911817] kasan_save_stack+0x22/0x50 [ 34.912349] kasan_set_track+0x25/0x30 [ 34.912853] kasan_save_free_info+0x2b/0x50 [ 34.913405] __kasan_slab_free+0x10a/0x190 [ 34.913976] kmem_cache_free+0x10d/0x4d0 [ 34.914537] rcu_core+0x8c8/0x2860 [ 34.915001] __do_softirq+0x1b7/0x7d4 [ 34.915511] [ 34.915736] Last potentially related work creation: [ 34.916345] kasan_save_stack+0x22/0x50 [ 34.916880] __kasan_record_aux_stack+0x8e/0xa0 [ 34.917473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.918182] remove_vma+0x139/0x170 [ 34.918662] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.919265] do_vmi_munmap+0x1f1/0x2b0 [ 34.919778] __vm_munmap+0x138/0x3a0 [ 34.920269] __x64_sys_munmap+0x59/0x80 [ 34.920793] do_syscall_64+0x3f/0x90 [ 34.921281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.921972] [ 34.922216] The buggy address belongs to the object at ffff88800ee7c0e8 [ 34.922216] which belongs to the cache vm_area_struct of size 168 [ 34.923787] The buggy address is located 88 bytes inside of [ 34.923787] freed 168-byte region [ffff88800ee7c0e8, ffff88800ee7c190) [ 34.925271] [ 34.925497] The buggy address belongs to the physical page: [ 34.926232] page:00000000388466d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee7c [ 34.927396] memcg:ffff88800ccc2e01 [ 34.927839] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.928511] page_type: 0xffffffff() [ 34.928983] raw: 0100000000000200 ffff88800879fc80 ffffea000025b980 dead000000000008 [ 34.929993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ccc2e01 [ 34.930968] page dumped because: kasan: bad access detected [ 34.931689] [ 34.931910] Memory state around the buggy address: [ 34.932514] ffff88800ee7c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.933415] ffff88800ee7c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.934349] >ffff88800ee7c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.935266] ^ [ 34.935928] ffff88800ee7c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.936840] ffff88800ee7c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.937742] ================================================================== [ 34.938818] Disabling lock debugging due to kernel taint [ 36.997161] BUG: Bad rss-counter state mm:00000000863107ef type:MM_FILEPAGES val:33 [ 36.998406] BUG: Bad rss-counter state mm:00000000863107ef type:MM_ANONPAGES val:22 [ 37.472995] BUG: Bad rss-counter state mm:00000000dbc923c4 type:MM_FILEPAGES val:33 [ 37.474181] BUG: Bad rss-counter state mm:00000000dbc923c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12655' (ECDSA) to the list of known hosts. 2023/06/19 13:39:19 fuzzer started 2023/06/19 13:39:19 dialing manager at localhost:44161 2023/06/19 13:39:19 checking machine... 2023/06/19 13:39:19 checking revisions... [ 38.118452] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:39:20 testing simple program... [ 38.169736] cgroup: Unknown subsys name 'net' [ 38.213364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000008 RCX=ffffffff81378270 RDX=1ffff1100378cc64 RSI=ffff88801bc66260 RDI=ffff88800844f780 RBP=dead000000000122 RSP=ffff88800d71fd80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=dead000000000100 R13=ffff88801bc662e0 R14=ffff88801bc66260 R15=dffffc0000000000 RIP=ffffffff81845e4a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3eb4e54900 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=00007f3eb540c0b0 CR3=000000000976c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f3eb5409650 CR3=000000001a0a4000 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=2039313a39333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a39333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000