syzkaller login: [ 38.749214] BUG: Bad rss-counter state mm:000000005115d051 type:MM_FILEPAGES val:33 [ 38.749792] BUG: Bad rss-counter state mm:000000005115d051 type:MM_ANONPAGES val:22 [ 38.869362] ================================================================== [ 38.870596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.871816] Read of size 8 at addr ffff88800e68c310 by task sshd/220 [ 38.872713] [ 38.872969] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.874018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.875165] Call Trace: [ 38.875558] [ 38.875892] dump_stack_lvl+0x91/0xf0 [ 38.876474] print_report+0xcc/0x620 [ 38.877047] ? __virt_addr_valid+0x102/0x340 [ 38.877694] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878429] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879165] kasan_report+0xbe/0xf0 [ 38.879730] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880485] vma_interval_tree_remove+0xc75/0xec0 [ 38.881210] vma_prepare+0xc54/0x11a0 [ 38.881808] __split_vma+0x5af/0x950 [ 38.882380] ? __pfx___split_vma+0x10/0x10 [ 38.882933] ? find_held_lock+0x2c/0x110 [ 38.883460] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.884023] ? lock_is_held_type+0x9f/0x120 [ 38.884561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.885160] ? mtree_range_walk+0x632/0x900 [ 38.885716] ? mas_walk+0x5c7/0x7c0 [ 38.886198] do_vmi_munmap+0x1f1/0x2b0 [ 38.886686] mmap_region+0x1f9/0x2660 [ 38.887165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.887672] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.888386] ? __pfx_lock_acquire+0x10/0x10 [ 38.888912] ? __pfx_mmap_region+0x10/0x10 [ 38.889442] ? security_mmap_addr+0x7d/0xa0 [ 38.889980] ? get_unmapped_area+0x1f5/0x3f0 [ 38.890530] do_mmap+0x854/0xf00 [ 38.890966] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.891459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.892030] ksys_mmap_pgoff+0x3af/0x500 [ 38.892539] do_syscall_64+0x3f/0x90 [ 38.893016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893664] RIP: 0033:0x7fec14654d82 [ 38.894141] 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 [ 38.896410] RSP: 002b:00007ffc02522578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.897440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec14654d82 [ 38.898394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec13a8e000 [ 38.899348] RBP: 00007fec13a8e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.900291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e707c79f70 [ 38.901242] R13: 00007ffc02522590 R14: 00007ffc025225c0 R15: 00007ffc02522920 [ 38.902231] [ 38.902542] [ 38.902778] Allocated by task 213: [ 38.903250] kasan_save_stack+0x22/0x50 [ 38.903804] kasan_set_track+0x25/0x30 [ 38.904365] __kasan_slab_alloc+0x59/0x70 [ 38.904947] kmem_cache_alloc+0x16b/0x370 [ 38.905509] vm_area_dup+0x20/0x160 [ 38.906029] __split_vma+0x170/0x950 [ 38.906549] split_vma+0xc6/0x110 [ 38.907031] mprotect_fixup+0x8d2/0xb30 [ 38.907594] do_mprotect_pkey+0x87e/0xd40 [ 38.908164] __x64_sys_mprotect+0x78/0xc0 [ 38.908750] do_syscall_64+0x3f/0x90 [ 38.909277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910014] [ 38.910250] Freed by task 13: [ 38.910681] kasan_save_stack+0x22/0x50 [ 38.911247] kasan_set_track+0x25/0x30 [ 38.911776] kasan_save_free_info+0x2b/0x50 [ 38.912364] __kasan_slab_free+0x10a/0x190 [ 38.912954] kmem_cache_free+0x10d/0x4d0 [ 38.913511] rcu_core+0x8c8/0x2860 [ 38.914016] __do_softirq+0x1b7/0x7d4 [ 38.914550] [ 38.914789] Last potentially related work creation: [ 38.915452] kasan_save_stack+0x22/0x50 [ 38.916020] __kasan_record_aux_stack+0x8e/0xa0 [ 38.916666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.917389] remove_vma+0x139/0x170 [ 38.917916] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918536] do_vmi_munmap+0x1f1/0x2b0 [ 38.919083] __vm_munmap+0x138/0x3a0 [ 38.919604] __x64_sys_munmap+0x59/0x80 [ 38.920162] do_syscall_64+0x3f/0x90 [ 38.920682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921385] [ 38.921621] Second to last potentially related work creation: [ 38.922406] kasan_save_stack+0x22/0x50 [ 38.922952] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924297] remove_vma+0x139/0x170 [ 38.924804] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925417] do_vmi_munmap+0x1f1/0x2b0 [ 38.925963] mmap_region+0x1f9/0x2660 [ 38.926488] do_mmap+0x854/0xf00 [ 38.926962] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.927498] ksys_mmap_pgoff+0x3af/0x500 [ 38.928043] do_syscall_64+0x3f/0x90 [ 38.928560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929286] [ 38.929522] The buggy address belongs to the object at ffff88800e68c2b8 [ 38.929522] which belongs to the cache vm_area_struct of size 168 [ 38.931208] The buggy address is located 88 bytes inside of [ 38.931208] freed 168-byte region [ffff88800e68c2b8, ffff88800e68c360) [ 38.932817] [ 38.933049] The buggy address belongs to the physical page: [ 38.933789] page:000000005390dcaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe68c [ 38.935013] memcg:ffff88800e3c8c01 [ 38.935487] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936215] page_type: 0xffffffff() [ 38.936718] raw: 0100000000000200 ffff8880087a0c80 ffffea00005616c0 dead000000000006 [ 38.937735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3c8c01 [ 38.938791] page dumped because: kasan: bad access detected [ 38.939515] [ 38.939744] Memory state around the buggy address: [ 38.940388] ffff88800e68c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.941345] ffff88800e68c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.942296] >ffff88800e68c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.943233] ^ [ 38.943759] ffff88800e68c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.944723] ffff88800e68c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.945664] ================================================================== [ 38.946872] Disabling lock debugging due to kernel taint [ 41.787697] BUG: Bad rss-counter state mm:00000000249755de type:MM_FILEPAGES val:33 [ 41.788671] BUG: Bad rss-counter state mm:00000000249755de type:MM_ANONPAGES val:22 [ 42.229609] BUG: Bad rss-counter state mm:00000000bc388c24 type:MM_FILEPAGES val:33 [ 42.230664] BUG: Bad rss-counter state mm:00000000bc388c24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41411' (ECDSA) to the list of known hosts. 2023/06/20 17:16:53 fuzzer started 2023/06/20 17:16:53 dialing manager at localhost:36067 2023/06/20 17:16:53 checking machine... 2023/06/20 17:16:53 checking revisions... [ 42.987146] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:16:53 testing simple program... [ 43.102494] cgroup: Unknown subsys name 'net' [ 43.158619] cgroup: Unknown subsys name 'rlimit' executing program executing program [ 51.520869] BUG: Bad rss-counter state mm:00000000a6b02cc0 type:MM_FILEPAGES val:159 [ 51.521953] BUG: Bad rss-counter state mm:00000000a6b02cc0 type:MM_ANONPAGES val:50 executing program VM DIAGNOSIS: 17:16:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000020 RCX=0000000000000000 RDX=ffff88800eec51c0 RSI=ffffffff844a4ffb RDI=0000000000000000 RBP=ffff88800eefda08 RSP=ffff888016017c98 R8 =0000000000000000 R9 =0000000000000004 R10=000000000000000e R11=0000000000000000 R12=0000000000000004 R13=000000000000000e R14=00007fbb521ec000 R15=00007fbb521e3fff RIP=ffffffff814c089b 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 00007fbb5221c900 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=00007fbb521fb020 CR3=0000000015bf4000 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=ffff888008e08001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e07f01 RSI=ffff888008e07f50 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e07f58 R15=ffff88806cf09a98 RIP=ffffffff811304d5 RFL=00000282 [--S----] 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 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=00007f7e6c980f10 CR3=0000000017ed8000 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=2032353a36313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36313a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000