syzkaller login: [ 32.483566] BUG: Bad rss-counter state mm:00000000b41238da type:MM_FILEPAGES val:33 [ 32.484326] BUG: Bad rss-counter state mm:00000000b41238da type:MM_ANONPAGES val:22 [ 32.612837] ================================================================== [ 32.613537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.614202] Read of size 8 at addr ffff888015a8b4e0 by task sshd/221 [ 32.614748] [ 32.614903] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.615508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.616209] Call Trace: [ 32.616437] [ 32.616640] dump_stack_lvl+0x91/0xf0 [ 32.616985] print_report+0xcc/0x620 [ 32.617475] ? __virt_addr_valid+0x102/0x340 [ 32.617867] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.618349] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.618784] kasan_report+0xbe/0xf0 [ 32.619118] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.619582] vma_interval_tree_remove+0xc75/0xec0 [ 32.620024] vma_prepare+0xc54/0x11a0 [ 32.620363] __split_vma+0x5af/0x950 [ 32.620695] ? __pfx___split_vma+0x10/0x10 [ 32.621070] ? find_held_lock+0x2c/0x110 [ 32.621440] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.621841] ? lock_is_held_type+0x9f/0x120 [ 32.622250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.622680] ? mtree_range_walk+0x632/0x900 [ 32.623074] ? mas_walk+0x5c7/0x7c0 [ 32.623451] do_vmi_munmap+0x1f1/0x2b0 [ 32.623814] mmap_region+0x1f9/0x2660 [ 32.624157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.624522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.625021] ? __pfx_lock_acquire+0x10/0x10 [ 32.625392] ? __pfx_mmap_region+0x10/0x10 [ 32.625769] ? security_mmap_addr+0x7d/0xa0 [ 32.626152] ? get_unmapped_area+0x1f5/0x3f0 [ 32.626556] do_mmap+0x854/0xf00 [ 32.626872] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.627253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.627680] ksys_mmap_pgoff+0x3af/0x500 [ 32.628043] do_syscall_64+0x3f/0x90 [ 32.628427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.628888] RIP: 0033:0x7fc34c04fd82 [ 32.629217] 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 [ 32.630734] RSP: 002b:00007fffb430dfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.631378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc34c04fd82 [ 32.631995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc34b489000 [ 32.632602] RBP: 00007fc34b489000 R08: 0000000000000009 R09: 0000000000001000 [ 32.633224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df57a91ec0 [ 32.633825] R13: 00007fffb430dff0 R14: 00007fffb430e020 R15: 00007fffb430e380 [ 32.634478] [ 32.634685] [ 32.634839] Allocated by task 214: [ 32.635143] kasan_save_stack+0x22/0x50 [ 32.635511] kasan_set_track+0x25/0x30 [ 32.635871] __kasan_slab_alloc+0x59/0x70 [ 32.636245] kmem_cache_alloc+0x16b/0x370 [ 32.636615] vm_area_dup+0x20/0x160 [ 32.636946] __split_vma+0x170/0x950 [ 32.637277] split_vma+0xc6/0x110 [ 32.637583] mprotect_fixup+0x8d2/0xb30 [ 32.637942] do_mprotect_pkey+0x87e/0xd40 [ 32.638331] __x64_sys_mprotect+0x78/0xc0 [ 32.638701] do_syscall_64+0x3f/0x90 [ 32.639030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.639535] [ 32.639739] Freed by task 19: [ 32.639950] kasan_save_stack+0x22/0x50 [ 32.640225] kasan_set_track+0x25/0x30 [ 32.640493] kasan_save_free_info+0x2b/0x50 [ 32.640786] __kasan_slab_free+0x10a/0x190 [ 32.641078] kmem_cache_free+0x10d/0x4d0 [ 32.641355] rcu_core+0x8c8/0x2860 [ 32.641602] __do_softirq+0x1b7/0x7d4 [ 32.641857] [ 32.641976] Last potentially related work creation: [ 32.642302] kasan_save_stack+0x22/0x50 [ 32.642576] __kasan_record_aux_stack+0x8e/0xa0 [ 32.642887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.643241] remove_vma+0x139/0x170 [ 32.643486] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.643800] do_vmi_munmap+0x1f1/0x2b0 [ 32.644078] __vm_munmap+0x138/0x3a0 [ 32.644345] __x64_sys_munmap+0x59/0x80 [ 32.644616] do_syscall_64+0x3f/0x90 [ 32.644873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.645241] [ 32.645371] The buggy address belongs to the object at ffff888015a8b488 [ 32.645371] which belongs to the cache vm_area_struct of size 168 [ 32.646174] The buggy address is located 88 bytes inside of [ 32.646174] freed 168-byte region [ffff888015a8b488, ffff888015a8b530) [ 32.646945] [ 32.647066] The buggy address belongs to the physical page: [ 32.647427] page:0000000044e35532 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a8b [ 32.648183] memcg:ffff88800d8de901 [ 32.648483] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.648941] page_type: 0xffffffff() [ 32.649262] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.649914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8de901 [ 32.650549] page dumped because: kasan: bad access detected [ 32.651009] [ 32.651161] Memory state around the buggy address: [ 32.651568] ffff888015a8b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.652187] ffff888015a8b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.652781] >ffff888015a8b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.653379] ^ [ 32.653906] ffff888015a8b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.654500] ffff888015a8b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.655095] ================================================================== [ 32.655860] Disabling lock debugging due to kernel taint [ 34.452650] BUG: Bad rss-counter state mm:000000004c60f4d6 type:MM_FILEPAGES val:33 [ 34.453361] BUG: Bad rss-counter state mm:000000004c60f4d6 type:MM_ANONPAGES val:22 [ 34.838931] BUG: Bad rss-counter state mm:00000000304f64ea type:MM_FILEPAGES val:33 [ 34.839662] BUG: Bad rss-counter state mm:00000000304f64ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3447' (ECDSA) to the list of known hosts. 2023/06/20 09:10:23 fuzzer started 2023/06/20 09:10:23 dialing manager at localhost:44161 2023/06/20 09:10:23 checking machine... 2023/06/20 09:10:23 checking revisions... [ 35.410235] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:10:23 testing simple program... [ 35.448342] cgroup: Unknown subsys name 'net' [ 35.485986] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:10:22 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=00000000dd9ec300 RCX=ffff88806cb61800 RDX=0000000000000007 RSI=ffffffff813782a8 RDI=000000008851dd35 RBP=ffff8880087efb80 RSP=ffff88806ce09b68 R8 =0000000028b3ac31 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bd0 R15=0000000000000007 RIP=ffffffff82270f40 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 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=00007f2846ce3ca0 CR3=000000000d652000 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=68da739751e108bb3e4737701418f0a7 XMM02=2c67c8bc2e329bc3000000000011deb8 XMM03=fb795ef6d65770560000000000124b88 XMM04=54248396b39becb300000000000ae988 XMM05=612510a98a6487f70000000000135578 XMM06=c291bd5c70af25b90000000000134618 XMM07=e042d86d42eb936e0000000000124e08 XMM08=c7bca8e50ec82867000000000011df18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000170de7eb1c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000054224 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0d5a R11=0000000000000001 R12=0000000000054224 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 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 00007ff06a986900 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=00007ffffcc1e000 CR3=000000000e528000 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