[ 26.012327] BUG: Bad rss-counter state mm:00000000eb700e22 type:MM_FILEPAGES val:33 [ 26.013354] BUG: Bad rss-counter state mm:00000000eb700e22 type:MM_ANONPAGES val:22 [ 26.187615] ================================================================== [ 26.188742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.189886] Read of size 8 at addr ffff888018f5c5c8 by task sshd/218 [ 26.190856] [ 26.191093] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.192026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.193078] Call Trace: [ 26.193420] [ 26.193734] dump_stack_lvl+0x91/0xf0 [ 26.194279] print_report+0xcc/0x620 [ 26.194812] ? __virt_addr_valid+0x102/0x340 [ 26.195426] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.196042] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.196685] kasan_report+0xbe/0xf0 [ 26.197214] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.197901] vma_interval_tree_remove+0xc75/0xec0 [ 26.198570] vma_prepare+0xc54/0x11a0 [ 26.199099] __split_vma+0x5af/0x950 [ 26.199619] ? __pfx___split_vma+0x10/0x10 [ 26.200204] ? find_held_lock+0x2c/0x110 [ 26.200793] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.201418] ? lock_is_held_type+0x9f/0x120 [ 26.202008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.202673] ? mtree_range_walk+0x632/0x900 [ 26.203285] ? mas_walk+0x5c7/0x7c0 [ 26.203810] do_vmi_munmap+0x1f1/0x2b0 [ 26.204353] mmap_region+0x1f9/0x2660 [ 26.204858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.205364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.206147] ? __pfx_lock_acquire+0x10/0x10 [ 26.206741] ? __pfx_mmap_region+0x10/0x10 [ 26.207334] ? security_mmap_addr+0x7d/0xa0 [ 26.207925] ? get_unmapped_area+0x1f5/0x3f0 [ 26.208533] do_mmap+0x854/0xf00 [ 26.208982] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.209489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.210128] ksys_mmap_pgoff+0x3af/0x500 [ 26.210695] do_syscall_64+0x3f/0x90 [ 26.211227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.211894] RIP: 0033:0x7feb520bad82 [ 26.212347] 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 [ 26.214681] RSP: 002b:00007ffcad137368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.215589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb520bad82 [ 26.216526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb514f4000 [ 26.217496] RBP: 00007feb514f4000 R08: 0000000000000009 R09: 0000000000001000 [ 26.218442] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f7f217ec0 [ 26.219387] R13: 00007ffcad137380 R14: 00007ffcad1373b0 R15: 00007ffcad137710 [ 26.220246] [ 26.220549] [ 26.220793] Allocated by task 207: [ 26.221269] kasan_save_stack+0x22/0x50 [ 26.221833] kasan_set_track+0x25/0x30 [ 26.222386] __kasan_slab_alloc+0x59/0x70 [ 26.222984] kmem_cache_alloc+0x16b/0x370 [ 26.223560] vm_area_dup+0x20/0x160 [ 26.224072] __split_vma+0x170/0x950 [ 26.224603] split_vma+0xc6/0x110 [ 26.225111] mprotect_fixup+0x8d2/0xb30 [ 26.225681] do_mprotect_pkey+0x87e/0xd40 [ 26.226267] __x64_sys_mprotect+0x78/0xc0 [ 26.226816] do_syscall_64+0x3f/0x90 [ 26.227301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.228002] [ 26.228245] Freed by task 207: [ 26.228705] kasan_save_stack+0x22/0x50 [ 26.229272] kasan_set_track+0x25/0x30 [ 26.229829] kasan_save_free_info+0x2b/0x50 [ 26.230430] __kasan_slab_free+0x10a/0x190 [ 26.230968] kmem_cache_free+0x10d/0x4d0 [ 26.231472] rcu_core+0x8c8/0x2860 [ 26.231973] __do_softirq+0x1b7/0x7d4 [ 26.232507] [ 26.232759] Last potentially related work creation: [ 26.233418] kasan_save_stack+0x22/0x50 [ 26.233985] __kasan_record_aux_stack+0x8e/0xa0 [ 26.234617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.235252] remove_vma+0x139/0x170 [ 26.235738] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.236368] do_vmi_munmap+0x1f1/0x2b0 [ 26.236939] __vm_munmap+0x138/0x3a0 [ 26.237467] __x64_sys_munmap+0x59/0x80 [ 26.238034] do_syscall_64+0x3f/0x90 [ 26.238567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.239297] [ 26.239541] Second to last potentially related work creation: [ 26.240319] kasan_save_stack+0x22/0x50 [ 26.240897] __kasan_record_aux_stack+0x8e/0xa0 [ 26.241543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.242275] remove_vma+0x139/0x170 [ 26.242755] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.243304] do_vmi_munmap+0x1f1/0x2b0 [ 26.243826] mmap_region+0x1f9/0x2660 [ 26.244360] do_mmap+0x854/0xf00 [ 26.244861] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.245417] ksys_mmap_pgoff+0x3af/0x500 [ 26.245991] do_syscall_64+0x3f/0x90 [ 26.246531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.247166] [ 26.247381] The buggy address belongs to the object at ffff888018f5c570 [ 26.247381] which belongs to the cache vm_area_struct of size 168 [ 26.249053] The buggy address is located 88 bytes inside of [ 26.249053] freed 168-byte region [ffff888018f5c570, ffff888018f5c618) [ 26.250653] [ 26.250903] The buggy address belongs to the physical page: [ 26.251658] page:0000000098cb0799 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f5c [ 26.252915] memcg:ffff88800fe2b001 [ 26.253401] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.254141] page_type: 0xffffffff() [ 26.254641] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 26.255555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe2b001 [ 26.256593] page dumped because: kasan: bad access detected [ 26.257363] [ 26.257609] Memory state around the buggy address: [ 26.258274] ffff888018f5c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.259161] ffff888018f5c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 26.260092] >ffff888018f5c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.261002] ^ [ 26.261659] ffff888018f5c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.262503] ffff888018f5c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.263349] ================================================================== [ 26.264303] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.859769] BUG: Bad rss-counter state mm:00000000c81fa3a6 type:MM_FILEPAGES val:33 [ 28.860980] BUG: Bad rss-counter state mm:00000000c81fa3a6 type:MM_ANONPAGES val:22 [ 29.223169] BUG: Bad rss-counter state mm:000000001a083279 type:MM_FILEPAGES val:33 [ 29.224162] BUG: Bad rss-counter state mm:000000001a083279 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40259' (ECDSA) to the list of known hosts. 2023/06/19 15:54:47 fuzzer started 2023/06/19 15:54:47 dialing manager at localhost:44161 2023/06/19 15:54:47 checking machine... 2023/06/19 15:54:47 checking revisions... [ 29.901264] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:54:47 testing simple program... [ 29.951239] cgroup: Unknown subsys name 'net' [ 30.013367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:45 Registers: info registers vcpu 0 RAX=000000000000000d RBX=0000000000000001 RCX=ffffffff816ab195 RDX=000000000000000d RSI=ffffffff8611ba46 RDI=ffffffff85dea2d0 RBP=ffffffff85dea2d0 RSP=ffff88806ce099e0 R8 =ffffffff8611ba46 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001c3bf R12=ffffffff85dea300 R13=ffffffff85dea2d0 R14=ffffffff85dea2d0 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000283 [--S---C] 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 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=00007f9b7604c028 CR3=000000001a240000 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=756e696c2d34365f3638782f62696c2f XMM01=00362e6f732e6362696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019d3f800 RBX=ffff888019d3f898 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019d3f870 RBP=ffff88800fdcd1c0 RSP=ffff888019d3f7b0 R8 =0000000000000001 R9 =0000000000000000 R10=ffff888019d3f800 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019d3f828 R14=ffff88800fdcd1c0 R15=ffff888019d3f800 RIP=ffffffff81132a9e 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 00007f8fbb272900 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=00007f8fbb82a0b0 CR3=0000000016a28000 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=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