syzkaller login: [ 28.856814] BUG: Bad rss-counter state mm:000000008827ff0d type:MM_FILEPAGES val:33 [ 28.858009] BUG: Bad rss-counter state mm:000000008827ff0d type:MM_ANONPAGES val:22 [ 28.899806] ================================================================== [ 28.900782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.901713] Read of size 8 at addr ffff88800e51b880 by task sshd/220 [ 28.902485] [ 28.902705] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.903569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904617] Call Trace: [ 28.904955] [ 28.905254] dump_stack_lvl+0x91/0xf0 [ 28.905754] print_report+0xcc/0x620 [ 28.906257] ? __virt_addr_valid+0x102/0x340 [ 28.906815] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907453] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908082] kasan_report+0xbe/0xf0 [ 28.908571] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909221] vma_interval_tree_remove+0xc75/0xec0 [ 28.909828] vma_prepare+0xc54/0x11a0 [ 28.910324] __split_vma+0x5af/0x950 [ 28.910802] ? __pfx___split_vma+0x10/0x10 [ 28.911338] ? find_held_lock+0x2c/0x110 [ 28.911864] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.912462] ? lock_is_held_type+0x9f/0x120 [ 28.913006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913623] ? mtree_range_walk+0x632/0x900 [ 28.914186] ? mas_walk+0x5c7/0x7c0 [ 28.914661] do_vmi_munmap+0x1f1/0x2b0 [ 28.915175] mmap_region+0x1f9/0x2660 [ 28.915672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.916182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.916922] ? __pfx_lock_acquire+0x10/0x10 [ 28.917466] ? __pfx_mmap_region+0x10/0x10 [ 28.918015] ? security_mmap_addr+0x7d/0xa0 [ 28.918561] ? get_unmapped_area+0x1f5/0x3f0 [ 28.919128] do_mmap+0x854/0xf00 [ 28.919585] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.920082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.920652] ksys_mmap_pgoff+0x3af/0x500 [ 28.921161] do_syscall_64+0x3f/0x90 [ 28.921644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922301] RIP: 0033:0x7fb0941e3d82 [ 28.922757] 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 [ 28.924933] RSP: 002b:00007fff871eed98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.925849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0941e3d82 [ 28.926698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb09361d000 [ 28.927548] RBP: 00007fb09361d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.928401] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ddabe1b20 [ 28.929253] R13: 00007fff871eedb0 R14: 00007fff871eede0 R15: 00007fff871ef140 [ 28.930126] [ 28.930420] [ 28.930638] Allocated by task 212: [ 28.931067] kasan_save_stack+0x22/0x50 [ 28.931573] kasan_set_track+0x25/0x30 [ 28.932067] __kasan_slab_alloc+0x59/0x70 [ 28.932616] kmem_cache_alloc+0x16b/0x370 [ 28.933137] vm_area_dup+0x20/0x160 [ 28.933597] __split_vma+0x170/0x950 [ 28.934068] split_vma+0xc6/0x110 [ 28.934505] mprotect_fixup+0x8d2/0xb30 [ 28.935009] do_mprotect_pkey+0x87e/0xd40 [ 28.935535] __x64_sys_mprotect+0x78/0xc0 [ 28.936061] do_syscall_64+0x3f/0x90 [ 28.936542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937187] [ 28.937404] Freed by task 212: [ 28.937801] kasan_save_stack+0x22/0x50 [ 28.938304] kasan_set_track+0x25/0x30 [ 28.938796] kasan_save_free_info+0x2b/0x50 [ 28.939331] __kasan_slab_free+0x10a/0x190 [ 28.939863] kmem_cache_free+0x10d/0x4d0 [ 28.940389] rcu_core+0x8c8/0x2860 [ 28.940841] __do_softirq+0x1b7/0x7d4 [ 28.941328] [ 28.941544] Last potentially related work creation: [ 28.942141] kasan_save_stack+0x22/0x50 [ 28.942644] __kasan_record_aux_stack+0x8e/0xa0 [ 28.943219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.943876] remove_vma+0x139/0x170 [ 28.944329] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.944923] do_vmi_munmap+0x1f1/0x2b0 [ 28.945417] __vm_munmap+0x138/0x3a0 [ 28.945883] __x64_sys_munmap+0x59/0x80 [ 28.946387] do_syscall_64+0x3f/0x90 [ 28.946861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947505] [ 28.947720] Second to last potentially related work creation: [ 28.948417] kasan_save_stack+0x22/0x50 [ 28.948924] __kasan_record_aux_stack+0x8e/0xa0 [ 28.949511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.950163] remove_vma+0x139/0x170 [ 28.950614] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.951179] do_vmi_munmap+0x1f1/0x2b0 [ 28.951666] mmap_region+0x1f9/0x2660 [ 28.952144] do_mmap+0x854/0xf00 [ 28.952583] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.953073] ksys_mmap_pgoff+0x3af/0x500 [ 28.953575] do_syscall_64+0x3f/0x90 [ 28.954047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954717] [ 28.954932] The buggy address belongs to the object at ffff88800e51b828 [ 28.954932] which belongs to the cache vm_area_struct of size 168 [ 28.956459] The buggy address is located 88 bytes inside of [ 28.956459] freed 168-byte region [ffff88800e51b828, ffff88800e51b8d0) [ 28.957912] [ 28.958132] The buggy address belongs to the physical page: [ 28.958806] page:00000000a459f422 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe51b [ 28.959921] memcg:ffff88800e218901 [ 28.960362] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.961029] page_type: 0xffffffff() [ 28.961500] raw: 0100000000000200 ffff8880087a0c80 ffffea0000315040 dead000000000004 [ 28.962437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e218901 [ 28.963366] page dumped because: kasan: bad access detected [ 28.964040] [ 28.964255] Memory state around the buggy address: [ 28.964852] ffff88800e51b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.965718] ffff88800e51b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.966592] >ffff88800e51b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.967437] ^ [ 28.967850] ffff88800e51b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.968721] ffff88800e51b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.969570] ================================================================== [ 28.970845] Disabling lock debugging due to kernel taint [ 30.835676] BUG: Bad rss-counter state mm:0000000004f6254e type:MM_FILEPAGES val:33 [ 30.836880] BUG: Bad rss-counter state mm:0000000004f6254e type:MM_ANONPAGES val:22 [ 31.244989] BUG: Bad rss-counter state mm:00000000514f9642 type:MM_FILEPAGES val:33 [ 31.245740] BUG: Bad rss-counter state mm:00000000514f9642 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17582' (ECDSA) to the list of known hosts. 2023/06/20 14:10:46 fuzzer started 2023/06/20 14:10:47 dialing manager at localhost:36067 2023/06/20 14:10:47 checking machine... 2023/06/20 14:10:47 checking revisions... [ 31.893986] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:10:47 testing simple program... [ 31.935206] cgroup: Unknown subsys name 'net' [ 31.963499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000d RCX=ffffffff844a90f8 RDX=ffff8880147d9b40 RSI=000000000000000d RDI=0000000000000000 RBP=ffff88800e65cc00 RSP=ffff88800ca37b18 R8 =0000000000000006 R9 =00007f598dfe3000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f598dfe3000 R13=dffffc0000000000 R14=0000000000000000 R15=ffff88800ca37e70 RIP=ffffffff814c03a8 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 00007f598e01f900 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=00007f598dffe020 CR3=0000000014626000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007efe7ca1c8e0 CR3=0000000017706000 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=2036343a30313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30313a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000