syzkaller login: [ 30.856527] BUG: Bad rss-counter state mm:000000008acebbd5 type:MM_FILEPAGES val:33 [ 30.857770] BUG: Bad rss-counter state mm:000000008acebbd5 type:MM_ANONPAGES val:22 [ 30.895417] ================================================================== [ 30.896887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.898418] Read of size 8 at addr ffff88801b894228 by task sshd/220 [ 30.899567] [ 30.899899] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.901033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.902327] Call Trace: [ 30.902752] <TASK> [ 30.903137] dump_stack_lvl+0x91/0xf0 [ 30.903781] print_report+0xcc/0x620 [ 30.904397] ? __virt_addr_valid+0x102/0x340 [ 30.905106] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.905903] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.906701] kasan_report+0xbe/0xf0 [ 30.907318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.908126] vma_interval_tree_remove+0xc75/0xec0 [ 30.908902] vma_prepare+0xc54/0x11a0 [ 30.909521] __split_vma+0x5af/0x950 [ 30.910131] ? __pfx___split_vma+0x10/0x10 [ 30.910808] ? find_held_lock+0x2c/0x110 [ 30.911503] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.912236] ? lock_is_held_type+0x9f/0x120 [ 30.912931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.913721] ? mtree_range_walk+0x632/0x900 [ 30.914391] ? mas_walk+0x5c7/0x7c0 [ 30.914926] do_vmi_munmap+0x1f1/0x2b0 [ 30.915493] mmap_region+0x1f9/0x2660 [ 30.916029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.916593] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.917387] ? __pfx_lock_acquire+0x10/0x10 [ 30.917976] ? __pfx_mmap_region+0x10/0x10 [ 30.918566] ? security_mmap_addr+0x7d/0xa0 [ 30.919187] ? get_unmapped_area+0x1f5/0x3f0 [ 30.919798] do_mmap+0x854/0xf00 [ 30.920284] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.920837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.921459] ksys_mmap_pgoff+0x3af/0x500 [ 30.922023] do_syscall_64+0x3f/0x90 [ 30.922553] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.923498] RIP: 0033:0x7f13a971dd82 [ 30.924016] 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 [ 30.926401] RSP: 002b:00007ffcdfcc8b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.927416] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13a971dd82 [ 30.928356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13a8b57000 [ 30.929294] RBP: 00007f13a8b57000 R08: 0000000000000009 R09: 0000000000001000 [ 30.930236] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8f52c0f70 [ 30.931197] R13: 00007ffcdfcc8b60 R14: 00007ffcdfcc8b90 R15: 00007ffcdfcc8ef0 [ 30.932150] </TASK> [ 30.932474] [ 30.932713] Allocated by task 213: [ 30.933187] kasan_save_stack+0x22/0x50 [ 30.933749] kasan_set_track+0x25/0x30 [ 30.934297] __kasan_slab_alloc+0x59/0x70 [ 30.934878] kmem_cache_alloc+0x16b/0x370 [ 30.935418] vm_area_dup+0x20/0x160 [ 30.935879] __split_vma+0x170/0x950 [ 30.936352] split_vma+0xc6/0x110 [ 30.936799] mprotect_fixup+0x8d2/0xb30 [ 30.937444] do_mprotect_pkey+0x87e/0xd40 [ 30.938048] __x64_sys_mprotect+0x78/0xc0 [ 30.938653] do_syscall_64+0x3f/0x90 [ 30.939272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.939973] [ 30.940205] Freed by task 203: [ 30.940630] kasan_save_stack+0x22/0x50 [ 30.941166] kasan_set_track+0x25/0x30 [ 30.941692] kasan_save_free_info+0x2b/0x50 [ 30.942256] __kasan_slab_free+0x10a/0x190 [ 30.942822] kmem_cache_free+0x10d/0x4d0 [ 30.943368] rcu_core+0x8c8/0x2860 [ 30.943859] __do_softirq+0x1b7/0x7d4 [ 30.944367] [ 30.944597] Last potentially related work creation: [ 30.945219] kasan_save_stack+0x22/0x50 [ 30.945759] __kasan_record_aux_stack+0x8e/0xa0 [ 30.946382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.947084] remove_vma+0x139/0x170 [ 30.947574] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.948190] do_vmi_munmap+0x1f1/0x2b0 [ 30.948728] __vm_munmap+0x138/0x3a0 [ 30.949238] __x64_sys_munmap+0x59/0x80 [ 30.949782] do_syscall_64+0x3f/0x90 [ 30.950305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951032] [ 30.951275] The buggy address belongs to the object at ffff88801b8941d0 [ 30.951275] which belongs to the cache vm_area_struct of size 168 [ 30.952934] The buggy address is located 88 bytes inside of [ 30.952934] freed 168-byte region [ffff88801b8941d0, ffff88801b894278) [ 30.954495] [ 30.954736] The buggy address belongs to the physical page: [ 30.955486] page:000000003516a088 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b894 [ 30.956706] memcg:ffff8880094c7601 [ 30.957171] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.957893] page_type: 0xffffffff() [ 30.958394] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.959426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094c7601 [ 30.960437] page dumped because: kasan: bad access detected [ 30.961180] [ 30.961421] Memory state around the buggy address: [ 30.962064] ffff88801b894100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.963014] ffff88801b894180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.963966] >ffff88801b894200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.964909] ^ [ 30.965522] ffff88801b894280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.966487] ffff88801b894300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.967453] ================================================================== [ 30.968965] Disabling lock debugging due to kernel taint [ 33.275744] BUG: Bad rss-counter state mm:0000000081e41495 type:MM_FILEPAGES val:33 [ 33.276353] BUG: Bad rss-counter state mm:0000000081e41495 type:MM_ANONPAGES val:22 [ 33.689680] BUG: Bad rss-counter state mm:000000002dcbb293 type:MM_FILEPAGES val:33 [ 33.690991] BUG: Bad rss-counter state mm:000000002dcbb293 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2293' (ECDSA) to the list of known hosts. 2023/06/19 22:27:33 fuzzer started 2023/06/19 22:27:33 dialing manager at localhost:44161 2023/06/19 22:27:33 checking machine... 2023/06/19 22:27:33 checking revisions... [ 34.352001] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:27:33 testing simple program... [ 34.401063] cgroup: Unknown subsys name 'net' [ 34.467951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:27:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001dbbd60 RSI=ffffffff8170a9d6 RDI=ffff88800eddeb00 RBP=ffff88800d8bfd90 RSP=ffff88800d8bfc00 R8 =0000000000000006 R9 =000000000001b1d3 R10=000000000007ffdf R11=0000000000000000 R12=ffffea00006c74c0 R13=ffff88800eddeae0 R14=ffff88800d8bfdb8 R15=000000001a14d067 RIP=ffffffff8170f154 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fabd8b61900 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=00007ffda08d9ebc CR3=0000000016a8c000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f4deb24a240 CR3=000000000ebb6000 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=2033333a37323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000