syzkaller login: [ 73.994843] BUG: Bad rss-counter state mm:00000000a5de8810 type:MM_FILEPAGES val:33 [ 73.995699] BUG: Bad rss-counter state mm:00000000a5de8810 type:MM_ANONPAGES val:22 [ 74.124419] ================================================================== [ 74.125233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.126032] Read of size 8 at addr ffff8880147cf4e0 by task sshd/219 [ 74.126583] [ 74.126742] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 74.127499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.128516] Call Trace: [ 74.128766] [ 74.128988] dump_stack_lvl+0x91/0xf0 [ 74.129325] print_report+0xcc/0x620 [ 74.129664] ? __virt_addr_valid+0x102/0x340 [ 74.130075] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.130561] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.130985] kasan_report+0xbe/0xf0 [ 74.131316] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.131771] vma_interval_tree_remove+0xc75/0xec0 [ 74.132179] vma_prepare+0xc54/0x11a0 [ 74.132542] __split_vma+0x5af/0x950 [ 74.132890] ? __pfx___split_vma+0x10/0x10 [ 74.133255] ? find_held_lock+0x2c/0x110 [ 74.133609] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.134037] ? lock_is_held_type+0x9f/0x120 [ 74.134392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.134784] ? mtree_range_walk+0x632/0x900 [ 74.135139] ? mas_walk+0x5c7/0x7c0 [ 74.135443] do_vmi_munmap+0x1f1/0x2b0 [ 74.135771] mmap_region+0x1f9/0x2660 [ 74.136097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.136418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.136884] ? __pfx_lock_acquire+0x10/0x10 [ 74.137225] ? __pfx_mmap_region+0x10/0x10 [ 74.137595] ? security_mmap_addr+0x7d/0xa0 [ 74.137990] ? get_unmapped_area+0x1f5/0x3f0 [ 74.138370] do_mmap+0x854/0xf00 [ 74.138677] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.139011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.139375] ksys_mmap_pgoff+0x3af/0x500 [ 74.139703] do_syscall_64+0x3f/0x90 [ 74.140010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.140424] RIP: 0033:0x7fa28c80dd82 [ 74.140716] 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 [ 74.142789] RSP: 002b:00007ffeedcae6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.143369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa28c80dd82 [ 74.143983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa28bc47000 [ 74.144559] RBP: 00007fa28bc47000 R08: 0000000000000009 R09: 0000000000001000 [ 74.145134] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584cddeeec0 [ 74.145778] R13: 00007ffeedcae6e0 R14: 00007ffeedcae710 R15: 00007ffeedcaea70 [ 74.146412] [ 74.146641] [ 74.146795] Allocated by task 212: [ 74.147115] kasan_save_stack+0x22/0x50 [ 74.147502] kasan_set_track+0x25/0x30 [ 74.147875] __kasan_slab_alloc+0x59/0x70 [ 74.148292] kmem_cache_alloc+0x16b/0x370 [ 74.148700] vm_area_dup+0x20/0x160 [ 74.149016] __split_vma+0x170/0x950 [ 74.149350] split_vma+0xc6/0x110 [ 74.149739] mprotect_fixup+0x8d2/0xb30 [ 74.150120] do_mprotect_pkey+0x87e/0xd40 [ 74.150511] __x64_sys_mprotect+0x78/0xc0 [ 74.150897] do_syscall_64+0x3f/0x90 [ 74.151212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.151625] [ 74.151770] Freed by task 202: [ 74.152037] kasan_save_stack+0x22/0x50 [ 74.152368] kasan_set_track+0x25/0x30 [ 74.152706] kasan_save_free_info+0x2b/0x50 [ 74.153065] __kasan_slab_free+0x10a/0x190 [ 74.153404] kmem_cache_free+0x10d/0x4d0 [ 74.153840] rcu_core+0x8c8/0x2860 [ 74.154130] __do_softirq+0x1b7/0x7d4 [ 74.154430] [ 74.154587] Last potentially related work creation: [ 74.154991] kasan_save_stack+0x22/0x50 [ 74.155338] __kasan_record_aux_stack+0x8e/0xa0 [ 74.155822] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.156292] remove_vma+0x139/0x170 [ 74.156598] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.156974] do_vmi_munmap+0x1f1/0x2b0 [ 74.157295] __vm_munmap+0x138/0x3a0 [ 74.157615] __x64_sys_munmap+0x59/0x80 [ 74.157972] do_syscall_64+0x3f/0x90 [ 74.158273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.158658] [ 74.158793] The buggy address belongs to the object at ffff8880147cf488 [ 74.158793] which belongs to the cache vm_area_struct of size 168 [ 74.159786] The buggy address is located 88 bytes inside of [ 74.159786] freed 168-byte region [ffff8880147cf488, ffff8880147cf530) [ 74.160679] [ 74.160819] The buggy address belongs to the physical page: [ 74.161242] page:000000005bf536b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147cf [ 74.161980] memcg:ffff88800e750001 [ 74.162252] flags: 0x100000000000200(slab|node=0|zone=1) [ 74.162666] page_type: 0xffffffff() [ 74.162951] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 74.163537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e750001 [ 74.164084] page dumped because: kasan: bad access detected [ 74.164483] [ 74.164622] Memory state around the buggy address: [ 74.164966] ffff8880147cf380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 74.165483] ffff8880147cf400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 74.166027] >ffff8880147cf480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.166630] ^ [ 74.167131] ffff8880147cf500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 74.167698] ffff8880147cf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.168228] ================================================================== [ 74.168898] Disabling lock debugging due to kernel taint [ 75.970937] BUG: Bad rss-counter state mm:0000000010167655 type:MM_FILEPAGES val:33 [ 75.971632] BUG: Bad rss-counter state mm:0000000010167655 type:MM_ANONPAGES val:22 [ 76.404529] BUG: Bad rss-counter state mm:0000000070d0e723 type:MM_FILEPAGES val:33 [ 76.405300] BUG: Bad rss-counter state mm:0000000070d0e723 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31776' (ECDSA) to the list of known hosts. 2023/06/20 09:28:42 fuzzer started 2023/06/20 09:28:42 dialing manager at localhost:44161 2023/06/20 09:28:42 checking machine... 2023/06/20 09:28:42 checking revisions... [ 76.927622] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:28:42 testing simple program... [ 76.967821] cgroup: Unknown subsys name 'net' [ 77.016407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:58 Registers: info registers vcpu 0 RAX=ffff88800ce99a00 RBX=ffff88806ce09ee8 RCX=1ffff110019d3340 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000002 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88801a20bf18 RIP=ffffffff8137fc84 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 00007fd464bf0900 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=00007fd4651a7618 CR3=000000000ed1c000 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=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=00007efe0425dae0 CR3=00000000096e0000 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=313384ec3dd804976247769f01249737 XMM02=2c67c8bc2e329bc30000000000121d78 XMM03=fb795ef6d65770560000000000128a88 XMM04=74acd3c64544620800000000000ae988 XMM05=dfcdbad4f1609c370000000000138bc8 XMM06=e5fda2884953b93d0000000000137a30 XMM07=e042d86d42eb936e0000000000128d08 XMM08=028315aef0fd24150000000000121dd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000