syzkaller login: [ 30.958871] BUG: Bad rss-counter state mm:000000007500a98f type:MM_FILEPAGES val:33 [ 30.960882] BUG: Bad rss-counter state mm:000000007500a98f type:MM_ANONPAGES val:22 [ 31.130658] ================================================================== [ 31.131596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.132529] Read of size 8 at addr ffff888009abdd08 by task sshd/221 [ 31.133301] [ 31.133525] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.134503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.135462] Call Trace: [ 31.135800] [ 31.136082] dump_stack_lvl+0x91/0xf0 [ 31.136571] print_report+0xcc/0x620 [ 31.137051] ? __virt_addr_valid+0x102/0x340 [ 31.137597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.138232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.138855] kasan_report+0xbe/0xf0 [ 31.139339] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139962] vma_interval_tree_remove+0xc75/0xec0 [ 31.140570] vma_prepare+0xc54/0x11a0 [ 31.141054] __split_vma+0x5af/0x950 [ 31.141527] ? __pfx___split_vma+0x10/0x10 [ 31.142066] ? find_held_lock+0x2c/0x110 [ 31.142589] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.143157] ? lock_is_held_type+0x9f/0x120 [ 31.143690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.144314] ? mtree_range_walk+0x632/0x900 [ 31.144861] ? mas_walk+0x5c7/0x7c0 [ 31.145344] do_vmi_munmap+0x1f1/0x2b0 [ 31.145837] mmap_region+0x1f9/0x2660 [ 31.146335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.146843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.147553] ? __pfx_lock_acquire+0x10/0x10 [ 31.148084] ? __pfx_mmap_region+0x10/0x10 [ 31.148613] ? security_mmap_addr+0x7d/0xa0 [ 31.149143] ? get_unmapped_area+0x1f5/0x3f0 [ 31.149695] do_mmap+0x854/0xf00 [ 31.150140] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.150637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.151198] ksys_mmap_pgoff+0x3af/0x500 [ 31.151709] do_syscall_64+0x3f/0x90 [ 31.152192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152843] RIP: 0033:0x7f02e4a90d82 [ 31.153296] 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 [ 31.155472] RSP: 002b:00007ffe43c39178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.156405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02e4a90d82 [ 31.157301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02e3eca000 [ 31.158215] RBP: 00007f02e3eca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.159104] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562c6e78ec0 [ 31.159993] R13: 00007ffe43c39190 R14: 00007ffe43c391c0 R15: 00007ffe43c39520 [ 31.160896] [ 31.161213] [ 31.161438] Allocated by task 214: [ 31.161893] kasan_save_stack+0x22/0x50 [ 31.162426] kasan_set_track+0x25/0x30 [ 31.162941] __kasan_slab_alloc+0x59/0x70 [ 31.163489] kmem_cache_alloc+0x16b/0x370 [ 31.164033] vm_area_dup+0x20/0x160 [ 31.164516] __split_vma+0x170/0x950 [ 31.165005] split_vma+0xc6/0x110 [ 31.165463] mprotect_fixup+0x8d2/0xb30 [ 31.166000] do_mprotect_pkey+0x87e/0xd40 [ 31.166552] __x64_sys_mprotect+0x78/0xc0 [ 31.167096] do_syscall_64+0x3f/0x90 [ 31.167597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.168266] [ 31.168496] Freed by task 214: [ 31.168911] kasan_save_stack+0x22/0x50 [ 31.169431] kasan_set_track+0x25/0x30 [ 31.169972] kasan_save_free_info+0x2b/0x50 [ 31.170538] __kasan_slab_free+0x10a/0x190 [ 31.171077] kmem_cache_free+0x10d/0x4d0 [ 31.171584] rcu_core+0x8c8/0x2860 [ 31.172035] __do_softirq+0x1b7/0x7d4 [ 31.172511] [ 31.172729] Last potentially related work creation: [ 31.173322] kasan_save_stack+0x22/0x50 [ 31.173830] __kasan_record_aux_stack+0x8e/0xa0 [ 31.174418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.175061] remove_vma+0x139/0x170 [ 31.175523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.176088] do_vmi_munmap+0x1f1/0x2b0 [ 31.176587] __vm_munmap+0x138/0x3a0 [ 31.177068] __x64_sys_munmap+0x59/0x80 [ 31.177566] do_syscall_64+0x3f/0x90 [ 31.178050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.178685] [ 31.178905] The buggy address belongs to the object at ffff888009abdcb0 [ 31.178905] which belongs to the cache vm_area_struct of size 168 [ 31.180391] The buggy address is located 88 bytes inside of [ 31.180391] freed 168-byte region [ffff888009abdcb0, ffff888009abdd58) [ 31.181791] [ 31.182028] The buggy address belongs to the physical page: [ 31.182689] page:0000000085321aeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9abd [ 31.183772] memcg:ffff888018265e01 [ 31.184203] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.184849] page_type: 0xffffffff() [ 31.185310] raw: 0100000000000200 ffff88800879fc80 ffffea00006054c0 0000000000000006 [ 31.186243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018265e01 [ 31.187153] page dumped because: kasan: bad access detected [ 31.187817] [ 31.188038] Memory state around the buggy address: [ 31.188663] ffff888009abdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.189575] ffff888009abdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.190508] >ffff888009abdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.191415] ^ [ 31.191879] ffff888009abdd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.192797] ffff888009abde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.193730] ================================================================== [ 31.194928] Disabling lock debugging due to kernel taint [ 33.108225] BUG: Bad rss-counter state mm:00000000dd431fc7 type:MM_FILEPAGES val:33 [ 33.109288] BUG: Bad rss-counter state mm:00000000dd431fc7 type:MM_ANONPAGES val:22 [ 33.578492] BUG: Bad rss-counter state mm:00000000dce75334 type:MM_FILEPAGES val:33 [ 33.579886] BUG: Bad rss-counter state mm:00000000dce75334 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58658' (ECDSA) to the list of known hosts. 2023/06/20 06:28:18 fuzzer started 2023/06/20 06:28:18 dialing manager at localhost:44161 2023/06/20 06:28:18 checking machine... 2023/06/20 06:28:18 checking revisions... [ 34.277247] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:28:18 testing simple program... [ 34.321476] cgroup: Unknown subsys name 'net' [ 34.352718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:17 Registers: info registers vcpu 0 RAX=00000000021b36ee RBX=00000000021b36ee RCX=0000000000000000 RDX=1ffff1100d9e72c9 RSI=ffff88800f0fd240 RDI=ffff88800f0fd330 RBP=ffff88806cf395c0 RSP=ffff888019d4f228 R8 =000000000005d000 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=ffff88800f0fd308 R13=00000000021b36ee R14=0000000000021800 R15=ffff88806cf39648 RIP=ffffffff81254ac1 RFL=00000046 [---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 00007faae4a60700 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=00007f6859281ed0 CR3=000000000972c000 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=38323a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002c33fc1 RBX=0000000000002000 RCX=0000000000000000 RDX=ffff888016ebd1c0 RSI=ffffffff8162f338 RDI=0000000000000005 RBP=00000000000028ed RSP=ffff88801619fb48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801619fdb0 R13=ffff88801619fdc8 R14=ffff88801619fe00 R15=dffffc0000000000 RIP=ffffffff8162f371 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 00007f23f9c56900 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=00007ffdaf9e7000 CR3=000000000efe0000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000