syzkaller login: [ 30.190751] BUG: Bad rss-counter state mm:00000000dcc1c0c5 type:MM_FILEPAGES val:33 [ 30.191792] BUG: Bad rss-counter state mm:00000000dcc1c0c5 type:MM_ANONPAGES val:22 [ 30.230738] ================================================================== [ 30.231787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.232865] Read of size 8 at addr ffff8880197d8df0 by task sshd/222 [ 30.233640] [ 30.233861] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.234728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.235719] Call Trace: [ 30.236041] [ 30.236324] dump_stack_lvl+0x91/0xf0 [ 30.236814] print_report+0xcc/0x620 [ 30.237295] ? __virt_addr_valid+0x102/0x340 [ 30.237841] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.238460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239076] kasan_report+0xbe/0xf0 [ 30.239571] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.240190] vma_interval_tree_remove+0xc75/0xec0 [ 30.240813] vma_prepare+0xc54/0x11a0 [ 30.241287] __split_vma+0x5af/0x950 [ 30.241759] ? __pfx___split_vma+0x10/0x10 [ 30.242290] ? find_held_lock+0x2c/0x110 [ 30.242814] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.243396] ? lock_is_held_type+0x9f/0x120 [ 30.243937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.244546] ? mtree_range_walk+0x632/0x900 [ 30.245100] ? mas_walk+0x5c7/0x7c0 [ 30.245574] do_vmi_munmap+0x1f1/0x2b0 [ 30.246065] mmap_region+0x1f9/0x2660 [ 30.246554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.247059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.247794] ? __pfx_lock_acquire+0x10/0x10 [ 30.248327] ? __pfx_mmap_region+0x10/0x10 [ 30.248864] ? security_mmap_addr+0x7d/0xa0 [ 30.249407] ? get_unmapped_area+0x1f5/0x3f0 [ 30.249957] do_mmap+0x854/0xf00 [ 30.250401] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.250906] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.251489] ksys_mmap_pgoff+0x3af/0x500 [ 30.251993] do_syscall_64+0x3f/0x90 [ 30.252477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.253119] RIP: 0033:0x7f5a30dbad82 [ 30.253574] 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 [ 30.255719] RSP: 002b:00007ffe614a2878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.256633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a30dbad82 [ 30.257482] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a301f4000 [ 30.258332] RBP: 00007f5a301f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.259182] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1903ceec0 [ 30.260042] R13: 00007ffe614a2890 R14: 00007ffe614a28c0 R15: 00007ffe614a2c20 [ 30.260904] [ 30.261196] [ 30.261412] Allocated by task 215: [ 30.261842] kasan_save_stack+0x22/0x50 [ 30.262347] kasan_set_track+0x25/0x30 [ 30.262842] __kasan_slab_alloc+0x59/0x70 [ 30.263372] kmem_cache_alloc+0x16b/0x370 [ 30.263894] vm_area_dup+0x20/0x160 [ 30.264348] __split_vma+0x170/0x950 [ 30.264812] split_vma+0xc6/0x110 [ 30.265255] mprotect_fixup+0x8d2/0xb30 [ 30.265761] do_mprotect_pkey+0x87e/0xd40 [ 30.266286] __x64_sys_mprotect+0x78/0xc0 [ 30.266806] do_syscall_64+0x3f/0x90 [ 30.267286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267930] [ 30.268144] Freed by task 215: [ 30.268546] kasan_save_stack+0x22/0x50 [ 30.269052] kasan_set_track+0x25/0x30 [ 30.269544] kasan_save_free_info+0x2b/0x50 [ 30.270079] __kasan_slab_free+0x10a/0x190 [ 30.270612] kmem_cache_free+0x10d/0x4d0 [ 30.271119] rcu_core+0x8c8/0x2860 [ 30.271588] __do_softirq+0x1b7/0x7d4 [ 30.272070] [ 30.272284] Last potentially related work creation: [ 30.272868] kasan_save_stack+0x22/0x50 [ 30.273372] __kasan_record_aux_stack+0x8e/0xa0 [ 30.273970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274625] remove_vma+0x139/0x170 [ 30.275072] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.275642] do_vmi_munmap+0x1f1/0x2b0 [ 30.276127] __vm_munmap+0x138/0x3a0 [ 30.276593] __x64_sys_munmap+0x59/0x80 [ 30.277091] do_syscall_64+0x3f/0x90 [ 30.277571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278213] [ 30.278428] The buggy address belongs to the object at ffff8880197d8d98 [ 30.278428] which belongs to the cache vm_area_struct of size 168 [ 30.279900] The buggy address is located 88 bytes inside of [ 30.279900] freed 168-byte region [ffff8880197d8d98, ffff8880197d8e40) [ 30.281311] [ 30.281528] The buggy address belongs to the physical page: [ 30.282181] page:000000007fdc2e70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197d8 [ 30.283284] memcg:ffff8880146d7a01 [ 30.283720] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.284370] page_type: 0xffffffff() [ 30.284825] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.285750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146d7a01 [ 30.286669] page dumped because: kasan: bad access detected [ 30.287369] [ 30.287586] Memory state around the buggy address: [ 30.288162] ffff8880197d8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.289017] ffff8880197d8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.289868] >ffff8880197d8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.290723] ^ [ 30.291534] ffff8880197d8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.292388] ffff8880197d8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.293245] ================================================================== [ 30.294175] Disabling lock debugging due to kernel taint [ 32.495602] BUG: Bad rss-counter state mm:00000000791f2e8c type:MM_FILEPAGES val:33 [ 32.496772] BUG: Bad rss-counter state mm:00000000791f2e8c type:MM_ANONPAGES val:22 [ 32.837290] BUG: Bad rss-counter state mm:000000006dd117c8 type:MM_FILEPAGES val:33 [ 32.838281] BUG: Bad rss-counter state mm:000000006dd117c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30916' (ECDSA) to the list of known hosts. 2023/06/20 15:21:22 fuzzer started 2023/06/20 15:21:22 dialing manager at localhost:36067 2023/06/20 15:21:22 checking machine... 2023/06/20 15:21:22 checking revisions... [ 33.539248] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:21:22 testing simple program... [ 33.590624] cgroup: Unknown subsys name 'net' [ 33.644398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:22 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=00007fe59916f660 CR3=0000000018c22000 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=2031323a31323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a31323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888009037be0 RCX=ffff888009037be0 RDX=00000000000d000d RSI=ffff888009037be0 RDI=ffff88800844f780 RBP=ffff88800dd9fa28 RSP=ffff88800dd9f990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000240dc0 R11=00000000000d000c R12=ffffea0000240dc0 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 00007f27a4718900 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=0000555da7f97954 CR3=000000001c532000 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=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