syzkaller login: [ 30.525046] BUG: Bad rss-counter state mm:00000000d2a09f74 type:MM_FILEPAGES val:33 [ 30.526096] BUG: Bad rss-counter state mm:00000000d2a09f74 type:MM_ANONPAGES val:22 [ 30.678576] ================================================================== [ 30.679558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.680555] Read of size 8 at addr ffff88801a2d5ed8 by task sshd/221 [ 30.681534] [ 30.681759] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.682623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.683688] Call Trace: [ 30.684019] [ 30.684302] dump_stack_lvl+0x91/0xf0 [ 30.684805] print_report+0xcc/0x620 [ 30.685292] ? __virt_addr_valid+0x102/0x340 [ 30.685854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687144] kasan_report+0xbe/0xf0 [ 30.687632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.688268] vma_interval_tree_remove+0xc75/0xec0 [ 30.688875] vma_prepare+0xc54/0x11a0 [ 30.689354] __split_vma+0x5af/0x950 [ 30.689851] ? __pfx___split_vma+0x10/0x10 [ 30.690404] ? find_held_lock+0x2c/0x110 [ 30.690961] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.691565] ? lock_is_held_type+0x9f/0x120 [ 30.692130] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.692766] ? mtree_range_walk+0x632/0x900 [ 30.693336] ? mas_walk+0x5c7/0x7c0 [ 30.693839] do_vmi_munmap+0x1f1/0x2b0 [ 30.694361] mmap_region+0x1f9/0x2660 [ 30.694866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.695436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.696187] ? __pfx_lock_acquire+0x10/0x10 [ 30.696769] ? __pfx_mmap_region+0x10/0x10 [ 30.697332] ? security_mmap_addr+0x7d/0xa0 [ 30.697900] ? get_unmapped_area+0x1f5/0x3f0 [ 30.698483] do_mmap+0x854/0xf00 [ 30.698949] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699498] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.700092] ksys_mmap_pgoff+0x3af/0x500 [ 30.700619] do_syscall_64+0x3f/0x90 [ 30.701137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701830] RIP: 0033:0x7f7c91b01d82 [ 30.702313] 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 [ 30.704600] RSP: 002b:00007ffd10f33f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.705546] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c91b01d82 [ 30.706464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c90f3b000 [ 30.707396] RBP: 00007f7c90f3b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.708297] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3a835eec0 [ 30.709201] R13: 00007ffd10f33f40 R14: 00007ffd10f33f70 R15: 00007ffd10f342d0 [ 30.710115] [ 30.710437] [ 30.710660] Allocated by task 214: [ 30.711126] kasan_save_stack+0x22/0x50 [ 30.711665] kasan_set_track+0x25/0x30 [ 30.712185] __kasan_slab_alloc+0x59/0x70 [ 30.712741] kmem_cache_alloc+0x16b/0x370 [ 30.713291] vm_area_dup+0x20/0x160 [ 30.713769] __split_vma+0x170/0x950 [ 30.714279] split_vma+0xc6/0x110 [ 30.714756] mprotect_fixup+0x8d2/0xb30 [ 30.715319] do_mprotect_pkey+0x87e/0xd40 [ 30.715873] __x64_sys_mprotect+0x78/0xc0 [ 30.716418] do_syscall_64+0x3f/0x90 [ 30.716919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.717604] [ 30.717833] Freed by task 214: [ 30.718245] kasan_save_stack+0x22/0x50 [ 30.718777] kasan_set_track+0x25/0x30 [ 30.719308] kasan_save_free_info+0x2b/0x50 [ 30.719874] __kasan_slab_free+0x10a/0x190 [ 30.720445] kmem_cache_free+0x10d/0x4d0 [ 30.720984] rcu_core+0x8c8/0x2860 [ 30.721453] __do_softirq+0x1b7/0x7d4 [ 30.721953] [ 30.722257] Last potentially related work creation: [ 30.722907] kasan_save_stack+0x22/0x50 [ 30.723469] __kasan_record_aux_stack+0x8e/0xa0 [ 30.724077] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.724753] remove_vma+0x139/0x170 [ 30.725270] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.725849] do_vmi_munmap+0x1f1/0x2b0 [ 30.726351] __vm_munmap+0x138/0x3a0 [ 30.726884] __x64_sys_munmap+0x59/0x80 [ 30.727431] do_syscall_64+0x3f/0x90 [ 30.727947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728624] [ 30.728859] The buggy address belongs to the object at ffff88801a2d5e80 [ 30.728859] which belongs to the cache vm_area_struct of size 168 [ 30.730433] The buggy address is located 88 bytes inside of [ 30.730433] freed 168-byte region [ffff88801a2d5e80, ffff88801a2d5f28) [ 30.731920] [ 30.732141] The buggy address belongs to the physical page: [ 30.732833] page:000000006a289fe8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2d5 [ 30.733985] memcg:ffff888019742a01 [ 30.734429] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.735122] page_type: 0xffffffff() [ 30.735602] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.736566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019742a01 [ 30.737523] page dumped because: kasan: bad access detected [ 30.738227] [ 30.738451] Memory state around the buggy address: [ 30.739061] ffff88801a2d5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.739966] ffff88801a2d5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.740863] >ffff88801a2d5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.741765] ^ [ 30.742535] ffff88801a2d5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.743461] ffff88801a2d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.744362] ================================================================== [ 30.745461] Disabling lock debugging due to kernel taint [ 32.806124] BUG: Bad rss-counter state mm:0000000089e3b5cf type:MM_FILEPAGES val:33 [ 32.807662] BUG: Bad rss-counter state mm:0000000089e3b5cf type:MM_ANONPAGES val:22 [ 33.346223] BUG: Bad rss-counter state mm:00000000013f504e type:MM_FILEPAGES val:33 [ 33.347419] BUG: Bad rss-counter state mm:00000000013f504e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54387' (ECDSA) to the list of known hosts. 2023/06/21 03:47:32 fuzzer started 2023/06/21 03:47:32 dialing manager at localhost:36067 2023/06/21 03:47:32 checking machine... 2023/06/21 03:47:32 checking revisions... [ 33.998351] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:47:33 testing simple program... [ 34.047316] cgroup: Unknown subsys name 'net' [ 34.092844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:47:32 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=00007fff1c666b08 CR3=0000000019430000 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=2032333a37343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888016a9f5c8 R8 =ffffffff8608a556 R9 =ffff888016a9f710 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc8c 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 00007f82e3b34900 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=00007ffdc78ba000 CR3=000000000d924000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000