syzkaller login: [ 31.139830] BUG: Bad rss-counter state mm:00000000b3a60027 type:MM_FILEPAGES val:33 [ 31.141022] BUG: Bad rss-counter state mm:00000000b3a60027 type:MM_ANONPAGES val:22 [ 31.179008] ================================================================== [ 31.179874] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.180871] Read of size 8 at addr ffff88800e300d08 by task sshd/220 [ 31.181607] [ 31.181850] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.182995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.183981] Call Trace: [ 31.184317] [ 31.184585] dump_stack_lvl+0x91/0xf0 [ 31.185050] print_report+0xcc/0x620 [ 31.185521] ? __virt_addr_valid+0x102/0x340 [ 31.186212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187610] kasan_report+0xbe/0xf0 [ 31.188081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188715] vma_interval_tree_remove+0xc75/0xec0 [ 31.189317] vma_prepare+0xc54/0x11a0 [ 31.189793] __split_vma+0x5af/0x950 [ 31.190284] ? __pfx___split_vma+0x10/0x10 [ 31.190813] ? find_held_lock+0x2c/0x110 [ 31.191336] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.191898] ? lock_is_held_type+0x9f/0x120 [ 31.192436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.193040] ? mtree_range_walk+0x632/0x900 [ 31.193586] ? mas_walk+0x5c7/0x7c0 [ 31.194082] do_vmi_munmap+0x1f1/0x2b0 [ 31.194572] mmap_region+0x1f9/0x2660 [ 31.195057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.195583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.196324] ? __pfx_lock_acquire+0x10/0x10 [ 31.196867] ? __pfx_mmap_region+0x10/0x10 [ 31.197407] ? security_mmap_addr+0x7d/0xa0 [ 31.197965] ? get_unmapped_area+0x1f5/0x3f0 [ 31.198539] do_mmap+0x854/0xf00 [ 31.198992] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.200085] ksys_mmap_pgoff+0x3af/0x500 [ 31.200614] do_syscall_64+0x3f/0x90 [ 31.201113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201777] RIP: 0033:0x7f162183dd82 [ 31.202272] 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 [ 31.204453] RSP: 002b:00007ffe0d443dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.205384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f162183dd82 [ 31.206258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1620c77000 [ 31.207138] RBP: 00007f1620c77000 R08: 0000000000000009 R09: 0000000000001000 [ 31.208008] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4e024fb20 [ 31.208880] R13: 00007ffe0d443de0 R14: 00007ffe0d443e10 R15: 00007ffe0d444170 [ 31.209769] [ 31.210072] [ 31.210289] Allocated by task 213: [ 31.210729] kasan_save_stack+0x22/0x50 [ 31.211246] kasan_set_track+0x25/0x30 [ 31.211757] __kasan_slab_alloc+0x59/0x70 [ 31.212299] kmem_cache_alloc+0x16b/0x370 [ 31.212834] vm_area_dup+0x20/0x160 [ 31.213299] __split_vma+0x170/0x950 [ 31.213776] split_vma+0xc6/0x110 [ 31.214244] mprotect_fixup+0x8d2/0xb30 [ 31.214770] do_mprotect_pkey+0x87e/0xd40 [ 31.215312] __x64_sys_mprotect+0x78/0xc0 [ 31.215847] do_syscall_64+0x3f/0x90 [ 31.216337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217004] [ 31.217221] Freed by task 13: [ 31.217615] kasan_save_stack+0x22/0x50 [ 31.218139] kasan_set_track+0x25/0x30 [ 31.218652] kasan_save_free_info+0x2b/0x50 [ 31.219205] __kasan_slab_free+0x10a/0x190 [ 31.219757] kmem_cache_free+0x10d/0x4d0 [ 31.220285] rcu_core+0x8c8/0x2860 [ 31.220741] __do_softirq+0x1b7/0x7d4 [ 31.221230] [ 31.221454] Last potentially related work creation: [ 31.222067] kasan_save_stack+0x22/0x50 [ 31.222589] __kasan_record_aux_stack+0x8e/0xa0 [ 31.223191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.223900] remove_vma+0x139/0x170 [ 31.224370] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.224950] do_vmi_munmap+0x1f1/0x2b0 [ 31.225448] __vm_munmap+0x138/0x3a0 [ 31.225937] __x64_sys_munmap+0x59/0x80 [ 31.226456] do_syscall_64+0x3f/0x90 [ 31.226945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227606] [ 31.227824] The buggy address belongs to the object at ffff88800e300cb0 [ 31.227824] which belongs to the cache vm_area_struct of size 168 [ 31.229335] The buggy address is located 88 bytes inside of [ 31.229335] freed 168-byte region [ffff88800e300cb0, ffff88800e300d58) [ 31.230809] [ 31.231030] The buggy address belongs to the physical page: [ 31.231715] page:00000000af5376da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe300 [ 31.232835] memcg:ffff88800e3c9001 [ 31.233271] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.234003] page_type: 0xffffffff() [ 31.234469] raw: 0100000000000200 ffff8880087a0c80 ffffea000032bf40 dead000000000003 [ 31.235422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3c9001 [ 31.236367] page dumped because: kasan: bad access detected [ 31.237049] [ 31.237267] Memory state around the buggy address: [ 31.237869] ffff88800e300c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.238767] ffff88800e300c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.239655] >ffff88800e300d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.240543] ^ [ 31.240994] ffff88800e300d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.241893] ffff88800e300e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.242770] ================================================================== [ 31.243722] Disabling lock debugging due to kernel taint [ 33.204304] BUG: Bad rss-counter state mm:0000000077d5719b type:MM_FILEPAGES val:33 [ 33.205509] BUG: Bad rss-counter state mm:0000000077d5719b type:MM_ANONPAGES val:22 [ 33.642812] BUG: Bad rss-counter state mm:00000000ffc681b6 type:MM_FILEPAGES val:33 [ 33.643799] BUG: Bad rss-counter state mm:00000000ffc681b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25985' (ECDSA) to the list of known hosts. 2023/06/20 10:49:51 fuzzer started 2023/06/20 10:49:52 dialing manager at localhost:36067 2023/06/20 10:49:52 checking machine... 2023/06/20 10:49:52 checking revisions... [ 34.347958] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:49:52 testing simple program... [ 34.394591] cgroup: Unknown subsys name 'net' [ 34.443746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:51 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=00007fbeef20b1b0 CR3=000000001838e000 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=2031353a39343a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a39343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=000000001a0fb8d0 RSP=ffff88800dc4fcd0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=ffffffff81ef10be R15=ffff888016278680 RIP=ffffffff8114325d 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 00007f0137190900 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=00007ffd343c3000 CR3=000000000e2d2000 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