[ 30.184072] BUG: Bad rss-counter state mm:000000004f495e81 type:MM_FILEPAGES val:33 [ 30.186182] BUG: Bad rss-counter state mm:000000004f495e81 type:MM_ANONPAGES val:22 [ 30.343916] ================================================================== [ 30.344829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.345763] Read of size 8 at addr ffff88800edcda50 by task sshd/227 [ 30.346530] [ 30.346755] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.347741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.348739] Call Trace: [ 30.349061] [ 30.349354] dump_stack_lvl+0x91/0xf0 [ 30.349849] print_report+0xcc/0x620 [ 30.350334] ? __virt_addr_valid+0x102/0x340 [ 30.350910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351524] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.352150] kasan_report+0xbe/0xf0 [ 30.352629] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.353251] vma_interval_tree_remove+0xc75/0xec0 [ 30.353853] vma_prepare+0xc54/0x11a0 [ 30.354336] __split_vma+0x5af/0x950 [ 30.354821] ? __pfx___split_vma+0x10/0x10 [ 30.355353] ? find_held_lock+0x2c/0x110 [ 30.355881] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.356447] ? lock_is_held_type+0x9f/0x120 [ 30.356991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.357597] ? mtree_range_walk+0x632/0x900 [ 30.358153] ? mas_walk+0x5c7/0x7c0 [ 30.358636] do_vmi_munmap+0x1f1/0x2b0 [ 30.359148] mmap_region+0x1f9/0x2660 [ 30.359625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.360137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.360847] ? __pfx_lock_acquire+0x10/0x10 [ 30.361377] ? __pfx_mmap_region+0x10/0x10 [ 30.361908] ? security_mmap_addr+0x7d/0xa0 [ 30.362440] ? get_unmapped_area+0x1f5/0x3f0 [ 30.363008] do_mmap+0x854/0xf00 [ 30.363444] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.363937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.364499] ksys_mmap_pgoff+0x3af/0x500 [ 30.365006] do_syscall_64+0x3f/0x90 [ 30.365484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.366133] RIP: 0033:0x7fab20e46d82 [ 30.366596] 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 [ 30.368773] RSP: 002b:00007ffe8c94f8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.369677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab20e46d82 [ 30.370527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab20280000 [ 30.371396] RBP: 00007fab20280000 R08: 0000000000000009 R09: 0000000000001000 [ 30.372245] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580916b2f70 [ 30.373097] R13: 00007ffe8c94f910 R14: 00007ffe8c94f940 R15: 00007ffe8c94fca0 [ 30.373984] [ 30.374280] [ 30.374494] Allocated by task 216: [ 30.374925] kasan_save_stack+0x22/0x50 [ 30.375434] kasan_set_track+0x25/0x30 [ 30.375931] __kasan_slab_alloc+0x59/0x70 [ 30.376467] kmem_cache_alloc+0x16b/0x370 [ 30.376982] vm_area_dup+0x20/0x160 [ 30.377440] __split_vma+0x170/0x950 [ 30.377908] split_vma+0xc6/0x110 [ 30.378348] mprotect_fixup+0x8d2/0xb30 [ 30.378873] do_mprotect_pkey+0x87e/0xd40 [ 30.379407] __x64_sys_mprotect+0x78/0xc0 [ 30.379932] do_syscall_64+0x3f/0x90 [ 30.380407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.381048] [ 30.381267] Freed by task 216: [ 30.381665] kasan_save_stack+0x22/0x50 [ 30.382170] kasan_set_track+0x25/0x30 [ 30.382661] kasan_save_free_info+0x2b/0x50 [ 30.383211] __kasan_slab_free+0x10a/0x190 [ 30.383747] kmem_cache_free+0x10d/0x4d0 [ 30.384261] rcu_core+0x8c8/0x2860 [ 30.384710] __do_softirq+0x1b7/0x7d4 [ 30.385189] [ 30.385409] Last potentially related work creation: [ 30.386002] kasan_save_stack+0x22/0x50 [ 30.386511] __kasan_record_aux_stack+0x8e/0xa0 [ 30.387104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.387757] remove_vma+0x139/0x170 [ 30.388213] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.388769] do_vmi_munmap+0x1f1/0x2b0 [ 30.389256] __vm_munmap+0x138/0x3a0 [ 30.389724] __x64_sys_munmap+0x59/0x80 [ 30.390227] do_syscall_64+0x3f/0x90 [ 30.390706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.391357] [ 30.391574] The buggy address belongs to the object at ffff88800edcd9f8 [ 30.391574] which belongs to the cache vm_area_struct of size 168 [ 30.393049] The buggy address is located 88 bytes inside of [ 30.393049] freed 168-byte region [ffff88800edcd9f8, ffff88800edcdaa0) [ 30.394462] [ 30.394677] The buggy address belongs to the physical page: [ 30.395361] page:000000008509dcaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedcd [ 30.396447] memcg:ffff888019b33501 [ 30.396873] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.397523] page_type: 0xffffffff() [ 30.397978] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.398912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b33501 [ 30.399822] page dumped because: kasan: bad access detected [ 30.400481] [ 30.400696] Memory state around the buggy address: [ 30.401276] ffff88800edcd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.402135] ffff88800edcd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.403010] >ffff88800edcda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.403893] ^ [ 30.404590] ffff88800edcda80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.405458] ffff88800edcdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.406322] ================================================================== [ 30.407300] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.147037] BUG: Bad rss-counter state mm:00000000f2ca151d type:MM_FILEPAGES val:33 [ 32.148185] BUG: Bad rss-counter state mm:00000000f2ca151d type:MM_ANONPAGES val:22 [ 32.593778] BUG: Bad rss-counter state mm:0000000009c32648 type:MM_FILEPAGES val:33 [ 32.594968] BUG: Bad rss-counter state mm:0000000009c32648 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10307' (ECDSA) to the list of known hosts. 2023/06/20 16:56:10 fuzzer started 2023/06/20 16:56:10 dialing manager at localhost:36067 2023/06/20 16:56:10 checking machine... 2023/06/20 16:56:10 checking revisions... [ 33.252648] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:56:10 testing simple program... [ 33.302894] cgroup: Unknown subsys name 'net' [ 33.355784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdbb48b2210 CR3=000000000ed34000 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=2030313a36353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a36353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000001 RDI=ffffed1003983800 RBP=ffffea0000730688 RSP=ffff888019e16fd0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffed1003983400 R11=0000000000000282 R12=0000000000000000 R13=ffffea00007306b4 R14=dffffc0000000000 R15=ffff88807ffdc500 RIP=ffffffff81794aac RFL=00000206 [-----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 00007f1fd401a900 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=00007f1fd3fdf008 CR3=000000001a146000 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=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