syzkaller login: [ 36.478824] BUG: Bad rss-counter state mm:0000000094c4a05f type:MM_FILEPAGES val:33 [ 36.479813] BUG: Bad rss-counter state mm:0000000094c4a05f type:MM_ANONPAGES val:22 [ 36.641341] ================================================================== [ 36.642284] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.643269] Read of size 8 at addr ffff888016de8058 by task sshd/221 [ 36.644165] [ 36.644387] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.645247] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.646231] Call Trace: [ 36.646554] [ 36.646839] dump_stack_lvl+0x91/0xf0 [ 36.647356] print_report+0xcc/0x620 [ 36.647844] ? __virt_addr_valid+0x102/0x340 [ 36.648413] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.649039] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.649657] kasan_report+0xbe/0xf0 [ 36.650134] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.650769] vma_interval_tree_remove+0xc75/0xec0 [ 36.651399] vma_prepare+0xc54/0x11a0 [ 36.651887] __split_vma+0x5af/0x950 [ 36.652372] ? __pfx___split_vma+0x10/0x10 [ 36.652905] ? find_held_lock+0x2c/0x110 [ 36.653435] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.653994] ? lock_is_held_type+0x9f/0x120 [ 36.654538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.655171] ? mtree_range_walk+0x632/0x900 [ 36.655726] ? mas_walk+0x5c7/0x7c0 [ 36.656201] do_vmi_munmap+0x1f1/0x2b0 [ 36.656693] mmap_region+0x1f9/0x2660 [ 36.657170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.657682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.658396] ? __pfx_lock_acquire+0x10/0x10 [ 36.658943] ? __pfx_mmap_region+0x10/0x10 [ 36.659472] ? security_mmap_addr+0x7d/0xa0 [ 36.660000] ? get_unmapped_area+0x1f5/0x3f0 [ 36.660549] do_mmap+0x854/0xf00 [ 36.660987] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.661483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.662040] ksys_mmap_pgoff+0x3af/0x500 [ 36.662546] do_syscall_64+0x3f/0x90 [ 36.663038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.663682] RIP: 0033:0x7f8c4f629d82 [ 36.664143] 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 [ 36.666271] RSP: 002b:00007fff789e2ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.667184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c4f629d82 [ 36.668029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c4ea63000 [ 36.668874] RBP: 00007f8c4ea63000 R08: 0000000000000009 R09: 0000000000001000 [ 36.669729] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abfac31ec0 [ 36.670584] R13: 00007fff789e2f10 R14: 00007fff789e2f40 R15: 00007fff789e32a0 [ 36.671452] [ 36.671742] [ 36.671956] Allocated by task 214: [ 36.672393] kasan_save_stack+0x22/0x50 [ 36.672893] kasan_set_track+0x25/0x30 [ 36.673383] __kasan_slab_alloc+0x59/0x70 [ 36.673907] kmem_cache_alloc+0x16b/0x370 [ 36.674421] vm_area_dup+0x20/0x160 [ 36.674875] __split_vma+0x170/0x950 [ 36.675368] split_vma+0xc6/0x110 [ 36.675812] mprotect_fixup+0x8d2/0xb30 [ 36.676312] do_mprotect_pkey+0x87e/0xd40 [ 36.676831] __x64_sys_mprotect+0x78/0xc0 [ 36.677353] do_syscall_64+0x3f/0x90 [ 36.677825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.678466] [ 36.678681] Freed by task 214: [ 36.679083] kasan_save_stack+0x22/0x50 [ 36.679589] kasan_set_track+0x25/0x30 [ 36.680084] kasan_save_free_info+0x2b/0x50 [ 36.680611] __kasan_slab_free+0x10a/0x190 [ 36.681140] kmem_cache_free+0x10d/0x4d0 [ 36.681643] rcu_core+0x8c8/0x2860 [ 36.682085] __do_softirq+0x1b7/0x7d4 [ 36.682557] [ 36.682770] Last potentially related work creation: [ 36.683370] kasan_save_stack+0x22/0x50 [ 36.683871] __kasan_record_aux_stack+0x8e/0xa0 [ 36.684439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.685082] remove_vma+0x139/0x170 [ 36.685534] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.686090] do_vmi_munmap+0x1f1/0x2b0 [ 36.686573] __vm_munmap+0x138/0x3a0 [ 36.687085] __x64_sys_munmap+0x59/0x80 [ 36.687578] do_syscall_64+0x3f/0x90 [ 36.688058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.688693] [ 36.688910] The buggy address belongs to the object at ffff888016de8000 [ 36.688910] which belongs to the cache vm_area_struct of size 168 [ 36.690373] The buggy address is located 88 bytes inside of [ 36.690373] freed 168-byte region [ffff888016de8000, ffff888016de80a8) [ 36.691787] [ 36.692004] The buggy address belongs to the physical page: [ 36.692662] page:000000000aadacd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16de8 [ 36.693752] memcg:ffff888015e8f301 [ 36.694176] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.694821] page_type: 0xffffffff() [ 36.695278] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.696197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e8f301 [ 36.697112] page dumped because: kasan: bad access detected [ 36.697777] [ 36.697992] Memory state around the buggy address: [ 36.698571] ffff888016de7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.699451] ffff888016de7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.700313] >ffff888016de8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.701174] ^ [ 36.701911] ffff888016de8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.702772] ffff888016de8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.703645] ================================================================== [ 36.704664] Disabling lock debugging due to kernel taint [ 38.597065] BUG: Bad rss-counter state mm:000000007e4995c3 type:MM_FILEPAGES val:33 [ 38.598033] BUG: Bad rss-counter state mm:000000007e4995c3 type:MM_ANONPAGES val:22 [ 39.139394] BUG: Bad rss-counter state mm:0000000041cd5fc5 type:MM_FILEPAGES val:33 [ 39.140563] BUG: Bad rss-counter state mm:0000000041cd5fc5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37710' (ECDSA) to the list of known hosts. 2023/06/20 05:44:25 fuzzer started 2023/06/20 05:44:25 dialing manager at localhost:44161 2023/06/20 05:44:25 checking machine... 2023/06/20 05:44:25 checking revisions... [ 39.760940] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:44:26 testing simple program... [ 39.813194] cgroup: Unknown subsys name 'net' [ 39.857915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:20 Registers: info registers vcpu 0 RAX=0000001743d5ffc4 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806ce28140 RDI=00000000000538a7 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef230 R11=0000000000000001 R12=00000000000538a7 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000016 [----AP-] 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 00007f6097174900 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=00007ffd17695000 CR3=00000000100cc000 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=6720646572637465733a4d41503d706f 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=ffff88806cf09b30 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09a01 RSI=ffff88806cf09a68 RDI=ffff88806cf09a68 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131236 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 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=00007f870ebf5490 CR3=000000000da84000 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=2035323a34343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a34343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000