syzkaller login: [ 30.621058] BUG: Bad rss-counter state mm:000000009276cc55 type:MM_FILEPAGES val:33 [ 30.622147] BUG: Bad rss-counter state mm:000000009276cc55 type:MM_ANONPAGES val:22 [ 30.788587] ================================================================== [ 30.789604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.790687] Read of size 8 at addr ffff88800d063798 by task sshd/221 [ 30.791565] [ 30.791881] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.792785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.793844] Call Trace: [ 30.794182] <TASK> [ 30.794482] dump_stack_lvl+0x91/0xf0 [ 30.795024] print_report+0xcc/0x620 [ 30.795518] ? __virt_addr_valid+0x102/0x340 [ 30.796095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796758] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797378] kasan_report+0xbe/0xf0 [ 30.797917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798550] vma_interval_tree_remove+0xc75/0xec0 [ 30.799300] vma_prepare+0xc54/0x11a0 [ 30.799901] __split_vma+0x5af/0x950 [ 30.800485] ? __pfx___split_vma+0x10/0x10 [ 30.801112] ? find_held_lock+0x2c/0x110 [ 30.801731] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.802429] ? lock_is_held_type+0x9f/0x120 [ 30.803120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.803817] ? mtree_range_walk+0x632/0x900 [ 30.804409] ? mas_walk+0x5c7/0x7c0 [ 30.804954] do_vmi_munmap+0x1f1/0x2b0 [ 30.805562] mmap_region+0x1f9/0x2660 [ 30.806098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.806745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.807581] ? __pfx_lock_acquire+0x10/0x10 [ 30.808175] ? __pfx_mmap_region+0x10/0x10 [ 30.808716] ? security_mmap_addr+0x7d/0xa0 [ 30.809288] ? get_unmapped_area+0x1f5/0x3f0 [ 30.809927] do_mmap+0x854/0xf00 [ 30.810469] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.811068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.811750] ksys_mmap_pgoff+0x3af/0x500 [ 30.812276] do_syscall_64+0x3f/0x90 [ 30.812797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813539] RIP: 0033:0x7f87b102bd82 [ 30.814065] 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 [ 30.816524] RSP: 002b:00007fff42cd05c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.817575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87b102bd82 [ 30.818598] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87b0465000 [ 30.819516] RBP: 00007f87b0465000 R08: 0000000000000009 R09: 0000000000001000 [ 30.820500] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563232e8eec0 [ 30.821362] R13: 00007fff42cd05e0 R14: 00007fff42cd0610 R15: 00007fff42cd0970 [ 30.822368] </TASK> [ 30.822723] [ 30.822990] Allocated by task 214: [ 30.823520] kasan_save_stack+0x22/0x50 [ 30.824028] kasan_set_track+0x25/0x30 [ 30.824567] __kasan_slab_alloc+0x59/0x70 [ 30.825133] kmem_cache_alloc+0x16b/0x370 [ 30.825712] vm_area_dup+0x20/0x160 [ 30.826246] __split_vma+0x170/0x950 [ 30.826754] split_vma+0xc6/0x110 [ 30.827224] mprotect_fixup+0x8d2/0xb30 [ 30.827734] do_mprotect_pkey+0x87e/0xd40 [ 30.828266] __x64_sys_mprotect+0x78/0xc0 [ 30.828818] do_syscall_64+0x3f/0x90 [ 30.829355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.830051] [ 30.830271] Freed by task 214: [ 30.830709] kasan_save_stack+0x22/0x50 [ 30.831234] kasan_set_track+0x25/0x30 [ 30.831827] kasan_save_free_info+0x2b/0x50 [ 30.832385] __kasan_slab_free+0x10a/0x190 [ 30.832920] kmem_cache_free+0x10d/0x4d0 [ 30.833426] rcu_core+0x8c8/0x2860 [ 30.833861] __do_softirq+0x1b7/0x7d4 [ 30.834349] [ 30.834583] Last potentially related work creation: [ 30.835191] kasan_save_stack+0x22/0x50 [ 30.835690] __kasan_record_aux_stack+0x8e/0xa0 [ 30.836267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.836926] remove_vma+0x139/0x170 [ 30.837394] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.837973] do_vmi_munmap+0x1f1/0x2b0 [ 30.838476] __vm_munmap+0x138/0x3a0 [ 30.838982] __x64_sys_munmap+0x59/0x80 [ 30.839489] do_syscall_64+0x3f/0x90 [ 30.839972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840616] [ 30.840828] The buggy address belongs to the object at ffff88800d063740 [ 30.840828] which belongs to the cache vm_area_struct of size 168 [ 30.842299] The buggy address is located 88 bytes inside of [ 30.842299] freed 168-byte region [ffff88800d063740, ffff88800d0637e8) [ 30.843725] [ 30.843953] The buggy address belongs to the physical page: [ 30.844631] page:00000000f05e37c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd063 [ 30.845738] memcg:ffff888017f71501 [ 30.846179] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.846858] page_type: 0xffffffff() [ 30.847328] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.848282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f71501 [ 30.849204] page dumped because: kasan: bad access detected [ 30.849885] [ 30.850107] Memory state around the buggy address: [ 30.850734] ffff88800d063680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.851644] ffff88800d063700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.852559] >ffff88800d063780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.853432] ^ [ 30.853933] ffff88800d063800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.854800] ffff88800d063880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.855654] ================================================================== [ 30.856647] Disabling lock debugging due to kernel taint [ 33.006745] BUG: Bad rss-counter state mm:000000009dbc995b type:MM_FILEPAGES val:33 [ 33.007894] BUG: Bad rss-counter state mm:000000009dbc995b type:MM_ANONPAGES val:22 [ 33.561716] BUG: Bad rss-counter state mm:000000009cddfd2f type:MM_FILEPAGES val:33 [ 33.562887] BUG: Bad rss-counter state mm:000000009cddfd2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31334' (ECDSA) to the list of known hosts. 2023/06/20 15:07:12 fuzzer started 2023/06/20 15:07:12 dialing manager at localhost:36067 2023/06/20 15:07:12 checking machine... 2023/06/20 15:07:12 checking revisions... [ 34.203544] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:07:12 testing simple program... [ 34.254613] cgroup: Unknown subsys name 'net' [ 34.293442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1380 RSI=ffffffff84537da7 RDI=ffff88806ce09b6c RBP=ffff88806ce09c00 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800ffdb680 R15=ffff88800e299410 RIP=ffffffff813ad547 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 00007f43793c8700 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=00007fd0c2a1be98 CR3=0000000008eba000 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=2032313a37303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a37303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea000063a4c0 RBX=ffff888018e93000 RCX=ffff88800844f780 RDX=ffff888098e93000 RSI=ffff888018e92be0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888018ea7a38 R8 =ffff888018e93000 R9 =0000000000000000 R10=ffffea000063a480 R11=00000000800d0007 R12=dffffc0000000000 R13=ffff888018ea7a78 R14=0000000000000000 R15=ffff888018e92be0 RIP=ffffffff81810393 RFL=00000286 [--S--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 00007f6b5257d900 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=00007ffcc4b68000 CR3=000000000e93c000 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