[ 31.972352] BUG: Bad rss-counter state mm:000000009b06aec4 type:MM_FILEPAGES val:33 [ 31.973861] BUG: Bad rss-counter state mm:000000009b06aec4 type:MM_ANONPAGES val:22 [ 32.135607] ================================================================== [ 32.136506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.137435] Read of size 8 at addr ffff88800db183f8 by task sshd/225 [ 32.138204] [ 32.138419] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.139466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.140449] Call Trace: [ 32.140772] [ 32.141052] dump_stack_lvl+0x91/0xf0 [ 32.141554] print_report+0xcc/0x620 [ 32.142047] ? __virt_addr_valid+0x102/0x340 [ 32.142595] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.143236] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.143860] kasan_report+0xbe/0xf0 [ 32.144339] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.144962] vma_interval_tree_remove+0xc75/0xec0 [ 32.145565] vma_prepare+0xc54/0x11a0 [ 32.146045] __split_vma+0x5af/0x950 [ 32.146514] ? __pfx___split_vma+0x10/0x10 [ 32.147061] ? find_held_lock+0x2c/0x110 [ 32.147582] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.148144] ? lock_is_held_type+0x9f/0x120 [ 32.148680] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.149287] ? mtree_range_walk+0x632/0x900 [ 32.149837] ? mas_walk+0x5c7/0x7c0 [ 32.150312] do_vmi_munmap+0x1f1/0x2b0 [ 32.150799] mmap_region+0x1f9/0x2660 [ 32.151317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.151828] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.152540] ? __pfx_lock_acquire+0x10/0x10 [ 32.153071] ? __pfx_mmap_region+0x10/0x10 [ 32.153598] ? security_mmap_addr+0x7d/0xa0 [ 32.154129] ? get_unmapped_area+0x1f5/0x3f0 [ 32.154677] do_mmap+0x854/0xf00 [ 32.155132] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.155632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.156197] ksys_mmap_pgoff+0x3af/0x500 [ 32.156701] do_syscall_64+0x3f/0x90 [ 32.157175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.157827] RIP: 0033:0x7f970e123d82 [ 32.158284] 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 [ 32.160386] RSP: 002b:00007ffc9a45f028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.161297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f970e123d82 [ 32.162147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f970d55d000 [ 32.163010] RBP: 00007f970d55d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.163847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bcfa7bd90 [ 32.164691] R13: 00007ffc9a45f040 R14: 00007ffc9a45f070 R15: 00007ffc9a45f3d0 [ 32.165545] [ 32.165835] [ 32.166052] Allocated by task 212: [ 32.166478] kasan_save_stack+0x22/0x50 [ 32.166986] kasan_set_track+0x25/0x30 [ 32.167476] __kasan_slab_alloc+0x59/0x70 [ 32.168004] kmem_cache_alloc+0x16b/0x370 [ 32.168518] vm_area_dup+0x20/0x160 [ 32.168966] __split_vma+0x170/0x950 [ 32.169436] split_vma+0xc6/0x110 [ 32.169872] mprotect_fixup+0x8d2/0xb30 [ 32.170368] do_mprotect_pkey+0x87e/0xd40 [ 32.170897] __x64_sys_mprotect+0x78/0xc0 [ 32.171420] do_syscall_64+0x3f/0x90 [ 32.171893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172538] [ 32.172754] Freed by task 13: [ 32.173135] kasan_save_stack+0x22/0x50 [ 32.173633] kasan_set_track+0x25/0x30 [ 32.174124] kasan_save_free_info+0x2b/0x50 [ 32.174654] __kasan_slab_free+0x10a/0x190 [ 32.175204] kmem_cache_free+0x10d/0x4d0 [ 32.175711] rcu_core+0x8c8/0x2860 [ 32.176156] __do_softirq+0x1b7/0x7d4 [ 32.176634] [ 32.176855] Last potentially related work creation: [ 32.177442] kasan_save_stack+0x22/0x50 [ 32.177945] __kasan_record_aux_stack+0x8e/0xa0 [ 32.178534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.179185] remove_vma+0x139/0x170 [ 32.179632] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.180201] do_vmi_munmap+0x1f1/0x2b0 [ 32.180756] __vm_munmap+0x138/0x3a0 [ 32.181219] __x64_sys_munmap+0x59/0x80 [ 32.181710] do_syscall_64+0x3f/0x90 [ 32.182185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.182843] [ 32.183057] The buggy address belongs to the object at ffff88800db183a0 [ 32.183057] which belongs to the cache vm_area_struct of size 168 [ 32.184532] The buggy address is located 88 bytes inside of [ 32.184532] freed 168-byte region [ffff88800db183a0, ffff88800db18448) [ 32.185933] [ 32.186145] The buggy address belongs to the physical page: [ 32.186810] page:00000000c4a73116 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb18 [ 32.187896] memcg:ffff88800ed41101 [ 32.188321] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.188965] page_type: 0xffffffff() [ 32.189416] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8a80 dead000000000008 [ 32.190331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed41101 [ 32.191244] page dumped because: kasan: bad access detected [ 32.191906] [ 32.192124] Memory state around the buggy address: [ 32.192709] ffff88800db18280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.193556] ffff88800db18300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.194413] >ffff88800db18380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.195273] ^ [ 32.196112] ffff88800db18400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.196963] ffff88800db18480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.197805] ================================================================== [ 32.198709] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.068537] BUG: Bad rss-counter state mm:000000008695a5a5 type:MM_FILEPAGES val:33 [ 34.069390] BUG: Bad rss-counter state mm:000000008695a5a5 type:MM_ANONPAGES val:22 [ 34.548224] BUG: Bad rss-counter state mm:00000000f1c39176 type:MM_FILEPAGES val:33 [ 34.549232] BUG: Bad rss-counter state mm:00000000f1c39176 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64186' (ECDSA) to the list of known hosts. 2023/06/21 03:42:44 fuzzer started 2023/06/21 03:42:45 dialing manager at localhost:36067 2023/06/21 03:42:45 checking machine... 2023/06/21 03:42:45 checking revisions... [ 35.270293] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:42:45 testing simple program... [ 35.314475] cgroup: Unknown subsys name 'net' [ 35.371855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:42:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff852c98d8 RCX=0000000000000000 RDX=ffff8880146d0000 RSI=ffffffff81ef118f RDI=ffff88800ea8f680 RBP=ffff88800ea8f680 RSP=ffff88801030fa58 R8 =ffff88801030fa30 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000008000 R13=ffff88800ea8f680 R14=0000000000000000 R15=ffff88801030fdf0 RIP=ffffffff814c086b 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 00007f33881e6900 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=00007f338879e0b0 CR3=0000000015a34000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc06 RBX=ffffffff85dfe034 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806cf099e0 R8 =ffffffff86138eb0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe038 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fd9bed92900 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=00007fd9be1af300 CR3=000000000d87e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e89e7e6a1e5f8c6200000000000ae988 XMM05=c7b5007fae445cbd0000000000132990 XMM06=ae9b264101391a5b0000000000131410 XMM07=fb795ef6d65770560000000000121960 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000