syzkaller login: [ 34.058463] BUG: Bad rss-counter state mm:0000000068ec70cb type:MM_FILEPAGES val:33 [ 34.059738] BUG: Bad rss-counter state mm:0000000068ec70cb type:MM_ANONPAGES val:22 [ 34.092731] ================================================================== [ 34.093800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.094832] Read of size 8 at addr ffff888015b7ddf0 by task sshd/219 [ 34.095683] [ 34.095901] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.096781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.097753] Call Trace: [ 34.098078] [ 34.098364] dump_stack_lvl+0x91/0xf0 [ 34.098868] print_report+0xcc/0x620 [ 34.099353] ? __virt_addr_valid+0x102/0x340 [ 34.099931] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.100543] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.101170] kasan_report+0xbe/0xf0 [ 34.101644] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.102274] vma_interval_tree_remove+0xc75/0xec0 [ 34.102877] vma_prepare+0xc54/0x11a0 [ 34.103362] __split_vma+0x5af/0x950 [ 34.103856] ? __pfx___split_vma+0x10/0x10 [ 34.104390] ? find_held_lock+0x2c/0x110 [ 34.104907] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.105488] ? lock_is_held_type+0x9f/0x120 [ 34.106030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.106633] ? mtree_range_walk+0x632/0x900 [ 34.107183] ? mas_walk+0x5c7/0x7c0 [ 34.107659] do_vmi_munmap+0x1f1/0x2b0 [ 34.108166] mmap_region+0x1f9/0x2660 [ 34.108646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.109162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.109881] ? __pfx_lock_acquire+0x10/0x10 [ 34.110413] ? __pfx_mmap_region+0x10/0x10 [ 34.110947] ? security_mmap_addr+0x7d/0xa0 [ 34.111475] ? get_unmapped_area+0x1f5/0x3f0 [ 34.112170] do_mmap+0x854/0xf00 [ 34.112679] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.113189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.113754] ksys_mmap_pgoff+0x3af/0x500 [ 34.114272] do_syscall_64+0x3f/0x90 [ 34.114750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.115389] RIP: 0033:0x7fb657623d82 [ 34.115853] 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 [ 34.117982] RSP: 002b:00007ffff522fea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.118888] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb657623d82 [ 34.119753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb656a5d000 [ 34.120603] RBP: 00007fb656a5d000 R08: 0000000000000009 R09: 0000000000001000 [ 34.121627] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb6e280ec0 [ 34.122466] R13: 00007ffff522fec0 R14: 00007ffff522fef0 R15: 00007ffff5230250 [ 34.123316] [ 34.123641] [ 34.123903] Allocated by task 212: [ 34.124471] kasan_save_stack+0x22/0x50 [ 34.125042] kasan_set_track+0x25/0x30 [ 34.125553] __kasan_slab_alloc+0x59/0x70 [ 34.126097] kmem_cache_alloc+0x16b/0x370 [ 34.126616] vm_area_dup+0x20/0x160 [ 34.127099] __split_vma+0x170/0x950 [ 34.127572] split_vma+0xc6/0x110 [ 34.128058] mprotect_fixup+0x8d2/0xb30 [ 34.128571] do_mprotect_pkey+0x87e/0xd40 [ 34.129106] __x64_sys_mprotect+0x78/0xc0 [ 34.129626] do_syscall_64+0x3f/0x90 [ 34.130104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.130757] [ 34.130979] Freed by task 212: [ 34.131378] kasan_save_stack+0x22/0x50 [ 34.131893] kasan_set_track+0x25/0x30 [ 34.132387] kasan_save_free_info+0x2b/0x50 [ 34.132918] __kasan_slab_free+0x10a/0x190 [ 34.133462] kmem_cache_free+0x10d/0x4d0 [ 34.133980] rcu_core+0x8c8/0x2860 [ 34.134422] __do_softirq+0x1b7/0x7d4 [ 34.134906] [ 34.135125] Last potentially related work creation: [ 34.135733] kasan_save_stack+0x22/0x50 [ 34.136235] __kasan_record_aux_stack+0x8e/0xa0 [ 34.136815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.137458] remove_vma+0x139/0x170 [ 34.137913] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.138476] do_vmi_munmap+0x1f1/0x2b0 [ 34.138971] __vm_munmap+0x138/0x3a0 [ 34.139439] __x64_sys_munmap+0x59/0x80 [ 34.139958] do_syscall_64+0x3f/0x90 [ 34.140443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.141081] [ 34.141299] The buggy address belongs to the object at ffff888015b7dd98 [ 34.141299] which belongs to the cache vm_area_struct of size 168 [ 34.142780] The buggy address is located 88 bytes inside of [ 34.142780] freed 168-byte region [ffff888015b7dd98, ffff888015b7de40) [ 34.144236] [ 34.144449] The buggy address belongs to the physical page: [ 34.145115] page:00000000894444ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b7d [ 34.146212] memcg:ffff88800e832e01 [ 34.146645] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.147354] page_type: 0xffffffff() [ 34.147822] raw: 0100000000000200 ffff88800879fc80 ffffea00003c6980 dead000000000005 [ 34.148751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e832e01 [ 34.149660] page dumped because: kasan: bad access detected [ 34.150334] [ 34.150550] Memory state around the buggy address: [ 34.151141] ffff888015b7dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.152016] ffff888015b7dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.152867] >ffff888015b7dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.153704] ^ [ 34.154510] ffff888015b7de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.155369] ffff888015b7de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.156242] ================================================================== [ 34.157249] Disabling lock debugging due to kernel taint [ 36.146165] BUG: Bad rss-counter state mm:0000000014ec1e33 type:MM_FILEPAGES val:33 [ 36.147372] BUG: Bad rss-counter state mm:0000000014ec1e33 type:MM_ANONPAGES val:22 [ 36.549153] BUG: Bad rss-counter state mm:000000007b583f78 type:MM_FILEPAGES val:33 [ 36.550796] BUG: Bad rss-counter state mm:000000007b583f78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60694' (ECDSA) to the list of known hosts. 2023/06/20 02:26:12 fuzzer started 2023/06/20 02:26:12 dialing manager at localhost:44161 2023/06/20 02:26:12 checking machine... 2023/06/20 02:26:12 checking revisions... [ 37.296500] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:26:12 testing simple program... [ 37.353704] cgroup: Unknown subsys name 'net' [ 37.441153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdc800cff8 CR3=000000000fc46000 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=2031313a36323a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b30 RCX=0000000000000001 RDX=1ffff1100d9e137c RSI=ffffffff8118ddc3 RDI=ffff88806cf09b3c RBP=ffff88806cf09be0 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b30 R13=0000000000000000 R14=ffff888016ba51c0 R15=ffff888017837480 RIP=ffffffff813ad4f9 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 00007f76120b1900 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=00007fef20a91650 CR3=000000000c9f4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b4f147da9364904c00000000000ae988 XMM05=a87e62a5fa8acda200000000001350d8 XMM06=806171799158d9670000000000133ec8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000