syzkaller login: [ 33.935333] BUG: Bad rss-counter state mm:00000000925f659c type:MM_FILEPAGES val:33 [ 33.937543] BUG: Bad rss-counter state mm:00000000925f659c type:MM_ANONPAGES val:22 [ 34.106587] ================================================================== [ 34.107600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.108721] Read of size 8 at addr ffff8880195e7058 by task sshd/228 [ 34.109555] [ 34.109792] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.110724] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.111812] Call Trace: [ 34.112160] [ 34.112471] dump_stack_lvl+0x91/0xf0 [ 34.113002] print_report+0xcc/0x620 [ 34.113535] ? __virt_addr_valid+0x102/0x340 [ 34.114141] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.114826] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.115506] kasan_report+0xbe/0xf0 [ 34.116022] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.116699] vma_interval_tree_remove+0xc75/0xec0 [ 34.117353] vma_prepare+0xc54/0x11a0 [ 34.117874] __split_vma+0x5af/0x950 [ 34.118381] ? __pfx___split_vma+0x10/0x10 [ 34.118960] ? find_held_lock+0x2c/0x110 [ 34.119556] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.120166] ? lock_is_held_type+0x9f/0x120 [ 34.120744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.121400] ? mtree_range_walk+0x632/0x900 [ 34.122008] ? mas_walk+0x5c7/0x7c0 [ 34.122516] do_vmi_munmap+0x1f1/0x2b0 [ 34.123062] mmap_region+0x1f9/0x2660 [ 34.123582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.124133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.124897] ? __pfx_lock_acquire+0x10/0x10 [ 34.125474] ? __pfx_mmap_region+0x10/0x10 [ 34.126049] ? security_mmap_addr+0x7d/0xa0 [ 34.126621] ? get_unmapped_area+0x1f5/0x3f0 [ 34.127232] do_mmap+0x854/0xf00 [ 34.127707] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.128239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.128844] ksys_mmap_pgoff+0x3af/0x500 [ 34.129397] do_syscall_64+0x3f/0x90 [ 34.129920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.130616] RIP: 0033:0x7fe7640a2d82 [ 34.131160] 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 [ 34.133375] RSP: 002b:00007ffe76da9a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.134305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7640a2d82 [ 34.135197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7634dc000 [ 34.136078] RBP: 00007fe7634dc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.136948] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629a20b2d90 [ 34.137815] R13: 00007ffe76da9a30 R14: 00007ffe76da9a60 R15: 00007ffe76da9dc0 [ 34.138694] [ 34.139019] [ 34.139241] Allocated by task 221: [ 34.139680] kasan_save_stack+0x22/0x50 [ 34.140198] kasan_set_track+0x25/0x30 [ 34.140708] __kasan_slab_alloc+0x59/0x70 [ 34.141252] kmem_cache_alloc+0x16b/0x370 [ 34.141786] vm_area_dup+0x20/0x160 [ 34.142254] __split_vma+0x170/0x950 [ 34.142742] split_vma+0xc6/0x110 [ 34.143213] mprotect_fixup+0x8d2/0xb30 [ 34.143733] do_mprotect_pkey+0x87e/0xd40 [ 34.144278] __x64_sys_mprotect+0x78/0xc0 [ 34.144820] do_syscall_64+0x3f/0x90 [ 34.145304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.145966] [ 34.146190] Freed by task 221: [ 34.146591] kasan_save_stack+0x22/0x50 [ 34.147127] kasan_set_track+0x25/0x30 [ 34.147643] kasan_save_free_info+0x2b/0x50 [ 34.148195] __kasan_slab_free+0x10a/0x190 [ 34.148745] kmem_cache_free+0x10d/0x4d0 [ 34.149273] rcu_core+0x8c8/0x2860 [ 34.149825] __do_softirq+0x1b7/0x7d4 [ 34.150410] [ 34.150666] Last potentially related work creation: [ 34.151431] kasan_save_stack+0x22/0x50 [ 34.152050] __kasan_record_aux_stack+0x8e/0xa0 [ 34.152748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.153526] remove_vma+0x139/0x170 [ 34.154078] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.154761] do_vmi_munmap+0x1f1/0x2b0 [ 34.155365] __vm_munmap+0x138/0x3a0 [ 34.155936] __x64_sys_munmap+0x59/0x80 [ 34.156544] do_syscall_64+0x3f/0x90 [ 34.157111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.157883] [ 34.158145] The buggy address belongs to the object at ffff8880195e7000 [ 34.158145] which belongs to the cache vm_area_struct of size 168 [ 34.159947] The buggy address is located 88 bytes inside of [ 34.159947] freed 168-byte region [ffff8880195e7000, ffff8880195e70a8) [ 34.161649] [ 34.161914] The buggy address belongs to the physical page: [ 34.162717] page:0000000065fd0cb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195e7 [ 34.164042] memcg:ffff88800f12b701 [ 34.164557] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.165306] page_type: 0xffffffff() [ 34.165818] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.166863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f12b701 [ 34.167902] page dumped because: kasan: bad access detected [ 34.168661] [ 34.168908] Memory state around the buggy address: [ 34.169567] ffff8880195e6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 34.170542] ffff8880195e6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.171535] >ffff8880195e7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.172500] ^ [ 34.173326] ffff8880195e7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.174301] ffff8880195e7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.175286] ================================================================== [ 34.176343] Disabling lock debugging due to kernel taint [ 36.086314] BUG: Bad rss-counter state mm:000000003e8f2f60 type:MM_FILEPAGES val:33 [ 36.087543] BUG: Bad rss-counter state mm:000000003e8f2f60 type:MM_ANONPAGES val:22 [ 36.415001] BUG: Bad rss-counter state mm:00000000bd840b31 type:MM_FILEPAGES val:33 [ 36.416142] BUG: Bad rss-counter state mm:00000000bd840b31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15370' (ECDSA) to the list of known hosts. 2023/06/20 05:53:16 fuzzer started 2023/06/20 05:53:16 dialing manager at localhost:44161 2023/06/20 05:53:16 checking machine... 2023/06/20 05:53:16 checking revisions... [ 37.007978] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:53:16 testing simple program... [ 37.043575] cgroup: Unknown subsys name 'net' [ 37.074854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:53:13 Registers: info registers vcpu 0 RAX=1ffff11001b08d69 RBX=ffff88800d846b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d846b48 RBP=ffff88800eadf400 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800eadf400 R14=ffffffff8186b9c5 R15=ffff88800e6ece80 RIP=ffffffff8184636c 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 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=00007f635930cd30 CR3=000000000e12c000 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=2036313a33353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800eb61b40 RCX=0000000000000000 RDX=0000000000000822 RSI=ffffffff814e626d RDI=ffff88800eb62d28 RBP=ffff88800febc0c0 RSP=ffff88806cf09da8 R8 =0000000000000007 R9 =00000000000f423f R10=00000000000f4240 R11=00000016f4e8f9b4 R12=00000000000f4240 R13=000000000a5caf77 R14=ffff888009e06fb8 R15=dffffc0000000000 RIP=ffffffff814e631d 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 00007feecef3b900 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=00007feecef05008 CR3=000000000e660000 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=00000000000000000000000000000000 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