[ 93.089782] BUG: Bad rss-counter state mm:0000000033c0ddb9 type:MM_FILEPAGES val:33 [ 93.091035] BUG: Bad rss-counter state mm:0000000033c0ddb9 type:MM_ANONPAGES val:22 [ 93.135618] ================================================================== [ 93.136531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.137477] Read of size 8 at addr ffff8880186354e0 by task sshd/218 [ 93.138259] [ 93.138480] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.139546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.140519] Call Trace: [ 93.140839] [ 93.141124] dump_stack_lvl+0x91/0xf0 [ 93.141614] print_report+0xcc/0x620 [ 93.142104] ? __virt_addr_valid+0x102/0x340 [ 93.142659] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.143284] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.143903] kasan_report+0xbe/0xf0 [ 93.144381] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.145016] vma_interval_tree_remove+0xc75/0xec0 [ 93.145625] vma_prepare+0xc54/0x11a0 [ 93.146103] __split_vma+0x5af/0x950 [ 93.146588] ? __pfx___split_vma+0x10/0x10 [ 93.147127] ? find_held_lock+0x2c/0x110 [ 93.147658] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.148231] ? lock_is_held_type+0x9f/0x120 [ 93.148774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.149391] ? mtree_range_walk+0x632/0x900 [ 93.149941] ? mas_walk+0x5c7/0x7c0 [ 93.150419] do_vmi_munmap+0x1f1/0x2b0 [ 93.150931] mmap_region+0x1f9/0x2660 [ 93.151417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.151932] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.152648] ? __pfx_lock_acquire+0x10/0x10 [ 93.153176] ? __pfx_mmap_region+0x10/0x10 [ 93.153702] ? security_mmap_addr+0x7d/0xa0 [ 93.154240] ? get_unmapped_area+0x1f5/0x3f0 [ 93.154805] do_mmap+0x854/0xf00 [ 93.155244] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.155744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.156309] ksys_mmap_pgoff+0x3af/0x500 [ 93.156820] do_syscall_64+0x3f/0x90 [ 93.157307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.157954] RIP: 0033:0x7f8cdc52fd82 [ 93.158412] 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 [ 93.160540] RSP: 002b:00007ffff4f33468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.161441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cdc52fd82 [ 93.162284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cdb969000 [ 93.163140] RBP: 00007f8cdb969000 R08: 0000000000000009 R09: 0000000000001000 [ 93.163997] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a160740d90 [ 93.164852] R13: 00007ffff4f33480 R14: 00007ffff4f334b0 R15: 00007ffff4f33810 [ 93.165716] [ 93.166007] [ 93.166228] Allocated by task 211: [ 93.166672] kasan_save_stack+0x22/0x50 [ 93.167190] kasan_set_track+0x25/0x30 [ 93.167683] __kasan_slab_alloc+0x59/0x70 [ 93.168213] kmem_cache_alloc+0x16b/0x370 [ 93.168726] vm_area_dup+0x20/0x160 [ 93.169184] __split_vma+0x170/0x950 [ 93.169653] split_vma+0xc6/0x110 [ 93.170092] mprotect_fixup+0x8d2/0xb30 [ 93.170593] do_mprotect_pkey+0x87e/0xd40 [ 93.171129] __x64_sys_mprotect+0x78/0xc0 [ 93.171655] do_syscall_64+0x3f/0x90 [ 93.172134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.172782] [ 93.172999] Freed by task 202: [ 93.173392] kasan_save_stack+0x22/0x50 [ 93.173899] kasan_set_track+0x25/0x30 [ 93.174401] kasan_save_free_info+0x2b/0x50 [ 93.174942] __kasan_slab_free+0x10a/0x190 [ 93.175494] kmem_cache_free+0x10d/0x4d0 [ 93.176007] rcu_core+0x8c8/0x2860 [ 93.176454] __do_softirq+0x1b7/0x7d4 [ 93.176933] [ 93.177152] Last potentially related work creation: [ 93.177743] kasan_save_stack+0x22/0x50 [ 93.178250] __kasan_record_aux_stack+0x8e/0xa0 [ 93.178856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.179507] remove_vma+0x139/0x170 [ 93.179961] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.180527] do_vmi_munmap+0x1f1/0x2b0 [ 93.181019] __vm_munmap+0x138/0x3a0 [ 93.181487] __x64_sys_munmap+0x59/0x80 [ 93.181989] do_syscall_64+0x3f/0x90 [ 93.182463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.183117] [ 93.183333] The buggy address belongs to the object at ffff888018635488 [ 93.183333] which belongs to the cache vm_area_struct of size 168 [ 93.184813] The buggy address is located 88 bytes inside of [ 93.184813] freed 168-byte region [ffff888018635488, ffff888018635530) [ 93.186218] [ 93.186440] The buggy address belongs to the physical page: [ 93.187103] page:0000000064b3de51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18635 [ 93.188187] memcg:ffff88800efa2901 [ 93.188618] flags: 0x100000000000200(slab|node=0|zone=1) [ 93.189262] page_type: 0xffffffff() [ 93.189724] raw: 0100000000000200 ffff88800879fc80 ffffea00003a1640 dead000000000008 [ 93.190665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efa2901 [ 93.191573] page dumped because: kasan: bad access detected [ 93.192236] [ 93.192454] Memory state around the buggy address: [ 93.193040] ffff888018635380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 93.193899] ffff888018635400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 93.194767] >ffff888018635480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 93.195630] ^ [ 93.196393] ffff888018635500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 93.197248] ffff888018635580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 93.198098] ================================================================== [ 93.199463] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 94.921022] BUG: Bad rss-counter state mm:00000000bf02b16f type:MM_FILEPAGES val:33 [ 94.922098] BUG: Bad rss-counter state mm:00000000bf02b16f type:MM_ANONPAGES val:22 [ 95.438753] BUG: Bad rss-counter state mm:0000000056b888b2 type:MM_FILEPAGES val:33 [ 95.439921] BUG: Bad rss-counter state mm:0000000056b888b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51956' (ECDSA) to the list of known hosts. 2023/06/19 15:36:46 fuzzer started 2023/06/19 15:36:46 dialing manager at localhost:44161 2023/06/19 15:36:46 checking machine... 2023/06/19 15:36:46 checking revisions... [ 96.122310] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:36:46 testing simple program... [ 96.163943] cgroup: Unknown subsys name 'net' [ 96.216932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff86137736 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800b87f7a0 RSP=ffff88800b87f6d8 R8 =ffffffff8613773a R9 =ffff88800b87f788 R10=0000000000038001 R11=0000000000020de7 R12=ffff88800b87f7a8 R13=ffff88800b87f790 R14=ffff88800b87fad0 R15=ffff88800b87f748 RIP=ffffffff81131162 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 00007f726552d900 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=00007fff5eb12000 CR3=000000000c738000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007fd005667bf0 CR3=000000000c79e000 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=2036343a36333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000