syzkaller login: [ 34.908122] BUG: Bad rss-counter state mm:000000005ea7de18 type:MM_FILEPAGES val:33 [ 34.909171] BUG: Bad rss-counter state mm:000000005ea7de18 type:MM_ANONPAGES val:22 [ 35.102420] ================================================================== [ 35.103319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.104220] Read of size 8 at addr ffff888016b8cdf0 by task sshd/221 [ 35.104964] [ 35.105176] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.106107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.107060] Call Trace: [ 35.107370] [ 35.107646] dump_stack_lvl+0x91/0xf0 [ 35.108124] print_report+0xcc/0x620 [ 35.108596] ? __virt_addr_valid+0x102/0x340 [ 35.109129] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.109728] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.110338] kasan_report+0xbe/0xf0 [ 35.110798] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.111400] vma_interval_tree_remove+0xc75/0xec0 [ 35.111986] vma_prepare+0xc54/0x11a0 [ 35.112453] __split_vma+0x5af/0x950 [ 35.112915] ? __pfx___split_vma+0x10/0x10 [ 35.113433] ? find_held_lock+0x2c/0x110 [ 35.113948] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.114517] ? lock_is_held_type+0x9f/0x120 [ 35.115045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.115650] ? mtree_range_walk+0x632/0x900 [ 35.116195] ? mas_walk+0x5c7/0x7c0 [ 35.116660] do_vmi_munmap+0x1f1/0x2b0 [ 35.117142] mmap_region+0x1f9/0x2660 [ 35.117614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.118120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.118821] ? __pfx_lock_acquire+0x10/0x10 [ 35.119343] ? __pfx_mmap_region+0x10/0x10 [ 35.119871] ? security_mmap_addr+0x7d/0xa0 [ 35.120394] ? get_unmapped_area+0x1f5/0x3f0 [ 35.120932] do_mmap+0x854/0xf00 [ 35.121365] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.121856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.122427] ksys_mmap_pgoff+0x3af/0x500 [ 35.122930] do_syscall_64+0x3f/0x90 [ 35.123396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.124028] RIP: 0033:0x7f1d0347ad82 [ 35.124476] 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 [ 35.126556] RSP: 002b:00007fff6793ad28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.127445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d0347ad82 [ 35.128282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d028b4000 [ 35.129114] RBP: 00007f1d028b4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.129949] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634d7f83f60 [ 35.130783] R13: 00007fff6793ad40 R14: 00007fff6793ad70 R15: 00007fff6793b0d0 [ 35.131613] [ 35.131901] [ 35.132110] Allocated by task 212: [ 35.132531] kasan_save_stack+0x22/0x50 [ 35.133034] kasan_set_track+0x25/0x30 [ 35.133514] __kasan_slab_alloc+0x59/0x70 [ 35.134025] kmem_cache_alloc+0x16b/0x370 [ 35.134545] vm_area_dup+0x20/0x160 [ 35.134994] __split_vma+0x170/0x950 [ 35.135449] split_vma+0xc6/0x110 [ 35.135884] mprotect_fixup+0x8d2/0xb30 [ 35.136371] do_mprotect_pkey+0x87e/0xd40 [ 35.136882] __x64_sys_mprotect+0x78/0xc0 [ 35.137395] do_syscall_64+0x3f/0x90 [ 35.137860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.138502] [ 35.138716] Freed by task 203: [ 35.139101] kasan_save_stack+0x22/0x50 [ 35.139595] kasan_set_track+0x25/0x30 [ 35.140080] kasan_save_free_info+0x2b/0x50 [ 35.140601] __kasan_slab_free+0x10a/0x190 [ 35.141126] kmem_cache_free+0x10d/0x4d0 [ 35.141624] rcu_core+0x8c8/0x2860 [ 35.142067] __do_softirq+0x1b7/0x7d4 [ 35.142542] [ 35.142753] Last potentially related work creation: [ 35.143327] kasan_save_stack+0x22/0x50 [ 35.143821] __kasan_record_aux_stack+0x8e/0xa0 [ 35.144385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.145027] remove_vma+0x139/0x170 [ 35.145477] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.146066] do_vmi_munmap+0x1f1/0x2b0 [ 35.146577] __vm_munmap+0x138/0x3a0 [ 35.147031] __x64_sys_munmap+0x59/0x80 [ 35.147514] do_syscall_64+0x3f/0x90 [ 35.147975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.148596] [ 35.148805] The buggy address belongs to the object at ffff888016b8cd98 [ 35.148805] which belongs to the cache vm_area_struct of size 168 [ 35.150244] The buggy address is located 88 bytes inside of [ 35.150244] freed 168-byte region [ffff888016b8cd98, ffff888016b8ce40) [ 35.151615] [ 35.151826] The buggy address belongs to the physical page: [ 35.152477] page:000000004e052cf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b8c [ 35.153546] memcg:ffff888019ee7f01 [ 35.153967] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.154866] page_type: 0xffffffff() [ 35.155427] raw: 0100000000000200 ffff88800879fc80 ffffea00005ae3c0 dead000000000008 [ 35.156552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ee7f01 [ 35.157668] page dumped because: kasan: bad access detected [ 35.158492] [ 35.158755] Memory state around the buggy address: [ 35.159464] ffff888016b8cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.160512] ffff888016b8cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.161558] >ffff888016b8cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.162620] ^ [ 35.163157] ffff888016b8ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.163663] ffff888016b8ce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.164172] ================================================================== [ 35.164846] Disabling lock debugging due to kernel taint [ 37.259465] BUG: Bad rss-counter state mm:00000000eaa5e6df type:MM_FILEPAGES val:33 [ 37.261032] BUG: Bad rss-counter state mm:00000000eaa5e6df type:MM_ANONPAGES val:22 [ 37.739784] BUG: Bad rss-counter state mm:000000001765223a type:MM_FILEPAGES val:33 [ 37.740769] BUG: Bad rss-counter state mm:000000001765223a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38733' (ECDSA) to the list of known hosts. 2023/06/19 19:48:14 fuzzer started 2023/06/19 19:48:14 dialing manager at localhost:44161 2023/06/19 19:48:14 checking machine... 2023/06/19 19:48:14 checking revisions... [ 38.442689] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:48:14 testing simple program... [ 38.495770] cgroup: Unknown subsys name 'net' [ 38.551654] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:48:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f137668 RCX=0000000000000001 RDX=1ffff11001e26ee1 RSI=ffffffff81b4bda1 RDI=ffff88800f137674 RBP=ffff88800f137708 RSP=ffff88800f137580 R8 =0000000000000001 R9 =ffff88800f1375e0 R10=0000000000038001 R11=000000000002b989 R12=ffff88800f137668 R13=0000000000000000 R14=ffff88801591b680 R15=0000000000000000 RIP=ffffffff813ad4f7 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 00007fb60132b700 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=00007f7b08175890 CR3=000000001a036000 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=2033313a38343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a38343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffc102b7000 CR3=000000001a328000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000