syzkaller login: [ 60.937499] BUG: Bad rss-counter state mm:0000000024052b2a type:MM_FILEPAGES val:33 [ 60.938616] BUG: Bad rss-counter state mm:0000000024052b2a type:MM_ANONPAGES val:22 [ 61.107842] ================================================================== [ 61.108746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.109712] Read of size 8 at addr ffff88800f1014e0 by task sshd/221 [ 61.110512] [ 61.110862] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.111785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.112778] Call Trace: [ 61.113114] [ 61.113396] dump_stack_lvl+0x91/0xf0 [ 61.113903] print_report+0xcc/0x620 [ 61.114399] ? __virt_addr_valid+0x102/0x340 [ 61.114969] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.115593] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.116216] kasan_report+0xbe/0xf0 [ 61.116693] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.117319] vma_interval_tree_remove+0xc75/0xec0 [ 61.117960] vma_prepare+0xc54/0x11a0 [ 61.118453] __split_vma+0x5af/0x950 [ 61.118929] ? __pfx___split_vma+0x10/0x10 [ 61.119457] ? find_held_lock+0x2c/0x110 [ 61.119986] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.120552] ? lock_is_held_type+0x9f/0x120 [ 61.121091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.121726] ? mtree_range_walk+0x632/0x900 [ 61.122276] ? mas_walk+0x5c7/0x7c0 [ 61.122758] do_vmi_munmap+0x1f1/0x2b0 [ 61.123245] mmap_region+0x1f9/0x2660 [ 61.123724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.124243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.124975] ? __pfx_lock_acquire+0x10/0x10 [ 61.125512] ? __pfx_mmap_region+0x10/0x10 [ 61.126066] ? security_mmap_addr+0x7d/0xa0 [ 61.126604] ? get_unmapped_area+0x1f5/0x3f0 [ 61.127169] do_mmap+0x854/0xf00 [ 61.127607] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.128102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.128662] ksys_mmap_pgoff+0x3af/0x500 [ 61.129163] do_syscall_64+0x3f/0x90 [ 61.129639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.130306] RIP: 0033:0x7fea206c0d82 [ 61.130759] 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 [ 61.132890] RSP: 002b:00007ffc8a39baa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.133810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea206c0d82 [ 61.134658] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea1fafa000 [ 61.135501] RBP: 00007fea1fafa000 R08: 0000000000000009 R09: 0000000000001000 [ 61.136353] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bb8401d90 [ 61.137210] R13: 00007ffc8a39bac0 R14: 00007ffc8a39baf0 R15: 00007ffc8a39be50 [ 61.138089] [ 61.138387] [ 61.138599] Allocated by task 214: [ 61.139030] kasan_save_stack+0x22/0x50 [ 61.139531] kasan_set_track+0x25/0x30 [ 61.140027] __kasan_slab_alloc+0x59/0x70 [ 61.140566] kmem_cache_alloc+0x16b/0x370 [ 61.141084] vm_area_dup+0x20/0x160 [ 61.141549] __split_vma+0x170/0x950 [ 61.142030] split_vma+0xc6/0x110 [ 61.142472] mprotect_fixup+0x8d2/0xb30 [ 61.142980] do_mprotect_pkey+0x87e/0xd40 [ 61.143508] __x64_sys_mprotect+0x78/0xc0 [ 61.144023] do_syscall_64+0x3f/0x90 [ 61.144501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.145143] [ 61.145358] Freed by task 214: [ 61.145759] kasan_save_stack+0x22/0x50 [ 61.146268] kasan_set_track+0x25/0x30 [ 61.146759] kasan_save_free_info+0x2b/0x50 [ 61.147300] __kasan_slab_free+0x10a/0x190 [ 61.147835] kmem_cache_free+0x10d/0x4d0 [ 61.148340] rcu_core+0x8c8/0x2860 [ 61.148786] __do_softirq+0x1b7/0x7d4 [ 61.149265] [ 61.149477] Last potentially related work creation: [ 61.150083] kasan_save_stack+0x22/0x50 [ 61.150584] __kasan_record_aux_stack+0x8e/0xa0 [ 61.151160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.151808] remove_vma+0x139/0x170 [ 61.152318] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.152916] do_vmi_munmap+0x1f1/0x2b0 [ 61.153415] __vm_munmap+0x138/0x3a0 [ 61.153908] __x64_sys_munmap+0x59/0x80 [ 61.154407] do_syscall_64+0x3f/0x90 [ 61.154886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.155525] [ 61.155738] Second to last potentially related work creation: [ 61.156432] kasan_save_stack+0x22/0x50 [ 61.156933] __kasan_record_aux_stack+0x8e/0xa0 [ 61.157507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.158164] remove_vma+0x139/0x170 [ 61.158618] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.159185] do_vmi_munmap+0x1f1/0x2b0 [ 61.159675] mmap_region+0x1f9/0x2660 [ 61.160160] do_mmap+0x854/0xf00 [ 61.160586] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.161085] ksys_mmap_pgoff+0x3af/0x500 [ 61.161584] do_syscall_64+0x3f/0x90 [ 61.162069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.162714] [ 61.162929] The buggy address belongs to the object at ffff88800f101488 [ 61.162929] which belongs to the cache vm_area_struct of size 168 [ 61.164402] The buggy address is located 88 bytes inside of [ 61.164402] freed 168-byte region [ffff88800f101488, ffff88800f101530) [ 61.165816] [ 61.166032] The buggy address belongs to the physical page: [ 61.166684] page:000000007c2f6392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf101 [ 61.167775] memcg:ffff88800cbe4d01 [ 61.168209] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.168906] page_type: 0xffffffff() [ 61.169358] raw: 0100000000000200 ffff88800879fc80 ffffea00003c03c0 dead000000000007 [ 61.170291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbe4d01 [ 61.171199] page dumped because: kasan: bad access detected [ 61.171855] [ 61.172072] Memory state around the buggy address: [ 61.172650] ffff88800f101380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.173511] ffff88800f101400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.174381] >ffff88800f101480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.175238] ^ [ 61.175990] ffff88800f101500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 61.176857] ffff88800f101580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.177707] ================================================================== [ 61.178652] Disabling lock debugging due to kernel taint [ 63.469687] BUG: Bad rss-counter state mm:00000000362ddeb5 type:MM_FILEPAGES val:33 [ 63.470715] BUG: Bad rss-counter state mm:00000000362ddeb5 type:MM_ANONPAGES val:22 [ 64.069309] BUG: Bad rss-counter state mm:0000000064faf259 type:MM_FILEPAGES val:33 [ 64.070349] BUG: Bad rss-counter state mm:0000000064faf259 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62861' (ECDSA) to the list of known hosts. 2023/06/19 11:00:12 fuzzer started 2023/06/19 11:00:12 dialing manager at localhost:44161 2023/06/19 11:00:12 checking machine... 2023/06/19 11:00:12 checking revisions... [ 64.714275] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:00:12 testing simple program... [ 64.774032] cgroup: Unknown subsys name 'net' [ 64.810078] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:11 Registers: info registers vcpu 0 RAX=ffffffff818df8cd RBX=ffffffff85e0aef4 RCX=ffffffff818df8b3 RDX=0000000000000000 RSI=ffffffff8614cc4c RDI=ffffffff85e0aed4 RBP=ffffffff85e0aeec RSP=ffff888019cb7810 R8 =ffffffff8614cc4c R9 =ffff888019cb7908 R10=0000000000038001 R11=00000000000246c0 R12=ffffffff85e0aef0 R13=ffffffff85e0aed4 R14=ffffffff85e0aee8 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007fe27fb14900 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=00007fe2800cb618 CR3=0000000014302000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007ffc1513d788 CR3=000000000e38a000 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=2031313a30303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a30303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000