[ 31.019069] BUG: Bad rss-counter state mm:00000000ac170145 type:MM_FILEPAGES val:33 [ 31.020175] BUG: Bad rss-counter state mm:00000000ac170145 type:MM_ANONPAGES val:22 [ 31.180525] ================================================================== [ 31.181443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.182401] Read of size 8 at addr ffff88800ed5ba50 by task sshd/219 [ 31.183159] [ 31.183374] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.184378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.185338] Call Trace: [ 31.185651] [ 31.185976] dump_stack_lvl+0x91/0xf0 [ 31.186480] print_report+0xcc/0x620 [ 31.186960] ? __virt_addr_valid+0x102/0x340 [ 31.187507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188726] kasan_report+0xbe/0xf0 [ 31.189199] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189821] vma_interval_tree_remove+0xc75/0xec0 [ 31.190413] vma_prepare+0xc54/0x11a0 [ 31.190894] __split_vma+0x5af/0x950 [ 31.191358] ? __pfx___split_vma+0x10/0x10 [ 31.191879] ? find_held_lock+0x2c/0x110 [ 31.192389] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.192950] ? lock_is_held_type+0x9f/0x120 [ 31.193483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.194095] ? mtree_range_walk+0x632/0x900 [ 31.194641] ? mas_walk+0x5c7/0x7c0 [ 31.195113] do_vmi_munmap+0x1f1/0x2b0 [ 31.195603] mmap_region+0x1f9/0x2660 [ 31.196080] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.196584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.197290] ? __pfx_lock_acquire+0x10/0x10 [ 31.197837] ? __pfx_mmap_region+0x10/0x10 [ 31.198368] ? security_mmap_addr+0x7d/0xa0 [ 31.198899] ? get_unmapped_area+0x1f5/0x3f0 [ 31.199442] do_mmap+0x854/0xf00 [ 31.199879] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.200369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.200927] ksys_mmap_pgoff+0x3af/0x500 [ 31.201433] do_syscall_64+0x3f/0x90 [ 31.201913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202563] RIP: 0033:0x7fd5d703fd82 [ 31.203018] 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 [ 31.205111] RSP: 002b:00007fffe528e068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.206014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5d703fd82 [ 31.206849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5d6479000 [ 31.207691] RBP: 00007fd5d6479000 R08: 0000000000000009 R09: 0000000000001000 [ 31.208531] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9a8a0fb20 [ 31.209375] R13: 00007fffe528e080 R14: 00007fffe528e0b0 R15: 00007fffe528e410 [ 31.210246] [ 31.210538] [ 31.210751] Allocated by task 212: [ 31.211182] kasan_save_stack+0x22/0x50 [ 31.211679] kasan_set_track+0x25/0x30 [ 31.212168] __kasan_slab_alloc+0x59/0x70 [ 31.212687] kmem_cache_alloc+0x16b/0x370 [ 31.213194] vm_area_dup+0x20/0x160 [ 31.213641] __split_vma+0x170/0x950 [ 31.214112] split_vma+0xc6/0x110 [ 31.214550] mprotect_fixup+0x8d2/0xb30 [ 31.215060] do_mprotect_pkey+0x87e/0xd40 [ 31.215570] __x64_sys_mprotect+0x78/0xc0 [ 31.216085] do_syscall_64+0x3f/0x90 [ 31.216551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217190] [ 31.217402] Freed by task 212: [ 31.217798] kasan_save_stack+0x22/0x50 [ 31.218292] kasan_set_track+0x25/0x30 [ 31.218779] kasan_save_free_info+0x2b/0x50 [ 31.219302] __kasan_slab_free+0x10a/0x190 [ 31.219834] kmem_cache_free+0x10d/0x4d0 [ 31.220336] rcu_core+0x8c8/0x2860 [ 31.220775] __do_softirq+0x1b7/0x7d4 [ 31.221250] [ 31.221462] Last potentially related work creation: [ 31.222064] kasan_save_stack+0x22/0x50 [ 31.222563] __kasan_record_aux_stack+0x8e/0xa0 [ 31.223129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.223767] remove_vma+0x139/0x170 [ 31.224218] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.224770] do_vmi_munmap+0x1f1/0x2b0 [ 31.225255] __vm_munmap+0x138/0x3a0 [ 31.225833] __x64_sys_munmap+0x59/0x80 [ 31.226329] do_syscall_64+0x3f/0x90 [ 31.226798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227436] [ 31.227649] Second to last potentially related work creation: [ 31.228325] kasan_save_stack+0x22/0x50 [ 31.228820] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230033] remove_vma+0x139/0x170 [ 31.230481] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231032] do_vmi_munmap+0x1f1/0x2b0 [ 31.231508] mmap_region+0x1f9/0x2660 [ 31.231976] do_mmap+0x854/0xf00 [ 31.232406] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232894] ksys_mmap_pgoff+0x3af/0x500 [ 31.233385] do_syscall_64+0x3f/0x90 [ 31.233873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234507] [ 31.234722] The buggy address belongs to the object at ffff88800ed5b9f8 [ 31.234722] which belongs to the cache vm_area_struct of size 168 [ 31.236185] The buggy address is located 88 bytes inside of [ 31.236185] freed 168-byte region [ffff88800ed5b9f8, ffff88800ed5baa0) [ 31.237573] [ 31.237796] The buggy address belongs to the physical page: [ 31.238447] page:00000000115705f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed5b [ 31.239518] memcg:ffff88800fad2b01 [ 31.239937] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.240628] page_type: 0xffffffff() [ 31.241073] raw: 0100000000000200 ffff8880087a0c80 ffffea000036ce00 dead000000000007 [ 31.241998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fad2b01 [ 31.242889] page dumped because: kasan: bad access detected [ 31.243542] [ 31.243755] Memory state around the buggy address: [ 31.244334] ffff88800ed5b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.245192] ffff88800ed5b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.246054] >ffff88800ed5ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246913] ^ [ 31.247611] ffff88800ed5ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.248450] ffff88800ed5bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.249285] ================================================================== [ 31.250231] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.268259] BUG: Bad rss-counter state mm:00000000e73f4a73 type:MM_FILEPAGES val:33 [ 33.269427] BUG: Bad rss-counter state mm:00000000e73f4a73 type:MM_ANONPAGES val:22 [ 33.677900] BUG: Bad rss-counter state mm:00000000ad76ccb2 type:MM_FILEPAGES val:33 [ 33.678966] BUG: Bad rss-counter state mm:00000000ad76ccb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50488' (ECDSA) to the list of known hosts. 2023/06/20 15:48:02 fuzzer started 2023/06/20 15:48:02 dialing manager at localhost:36067 2023/06/20 15:48:02 checking machine... 2023/06/20 15:48:02 checking revisions... [ 34.451021] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:48:02 testing simple program... [ 34.496442] cgroup: Unknown subsys name 'net' [ 34.543625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:48:02 Registers: info registers vcpu 0 RAX=ffffea0000504c80 RBX=ffff888014132000 RCX=ffff88800844f780 RDX=ffff888094132000 RSI=ffff88800f1e7980 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff8880164e7ba8 R8 =ffff888014132000 R9 =0000000000000000 R10=ffffea00003c79c0 R11=00000000000d0008 R12=dffffc0000000000 R13=ffff8880164e7be8 R14=0000000000000000 R15=ffff88800f1e7980 RIP=ffffffff81810393 RFL=00000282 [--S----] 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 00007f29ce5c5900 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=00007f29ceb7a650 CR3=000000000db4a000 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=1ffffffff0bc08d9 RBX=ffffffff85e046c8 RCX=ffffffff81865311 RDX=0000000000000008 RSI=ffffffff86142876 RDI=ffffffff85e046b8 RBP=ffffffff85e046b8 RSP=ffff888015b3f570 R8 =ffffffff86142876 R9 =ffff888015b3f668 R10=0000000000038001 R11=000000000002273d R12=ffffffff85e046d8 R13=ffffffff85e046b8 R14=ffffffff85e046b8 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000212 [----A--] 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 00007fe13e080700 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=00007f61a9ca88a8 CR3=000000000facc000 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=2031303a38343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a38343a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000