[ 36.259738] BUG: Bad rss-counter state mm:000000008306ffad type:MM_FILEPAGES val:33 [ 36.260543] BUG: Bad rss-counter state mm:000000008306ffad type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.361918] ================================================================== [ 36.362531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.363131] Read of size 8 at addr ffff88800feb5df0 by task sshd/221 [ 36.363627] [ 36.363769] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.364317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.364936] Call Trace: [ 36.365164] [ 36.365351] dump_stack_lvl+0x91/0xf0 [ 36.365675] print_report+0xcc/0x620 [ 36.365985] ? __virt_addr_valid+0x102/0x340 [ 36.366340] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.366940] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.367331] kasan_report+0xbe/0xf0 [ 36.367628] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.368007] vma_interval_tree_remove+0xc75/0xec0 [ 36.368385] vma_prepare+0xc54/0x11a0 [ 36.368692] __split_vma+0x5af/0x950 [ 36.369006] ? __pfx___split_vma+0x10/0x10 [ 36.369386] ? find_held_lock+0x2c/0x110 [ 36.369731] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.370107] ? lock_is_held_type+0x9f/0x120 [ 36.370480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.370888] ? mtree_range_walk+0x632/0x900 [ 36.371257] ? mas_walk+0x5c7/0x7c0 [ 36.371572] do_vmi_munmap+0x1f1/0x2b0 [ 36.371877] mmap_region+0x1f9/0x2660 [ 36.372189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.372518] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.372976] ? __pfx_lock_acquire+0x10/0x10 [ 36.373364] ? __pfx_mmap_region+0x10/0x10 [ 36.373710] ? security_mmap_addr+0x7d/0xa0 [ 36.374047] ? get_unmapped_area+0x1f5/0x3f0 [ 36.374398] do_mmap+0x854/0xf00 [ 36.374680] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.374996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.375351] ksys_mmap_pgoff+0x3af/0x500 [ 36.375671] do_syscall_64+0x3f/0x90 [ 36.375987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.376408] RIP: 0033:0x7f27543c0d82 [ 36.376698] 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 [ 36.378084] RSP: 002b:00007fff0d5d99d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.378656] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27543c0d82 [ 36.379206] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f27537fa000 [ 36.379753] RBP: 00007f27537fa000 R08: 0000000000000009 R09: 0000000000001000 [ 36.380298] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557daa47ed90 [ 36.380835] R13: 00007fff0d5d99f0 R14: 00007fff0d5d9a20 R15: 00007fff0d5d9d80 [ 36.381420] [ 36.381605] [ 36.381742] Allocated by task 214: [ 36.382022] kasan_save_stack+0x22/0x50 [ 36.382352] kasan_set_track+0x25/0x30 [ 36.382671] __kasan_slab_alloc+0x59/0x70 [ 36.383008] kmem_cache_alloc+0x16b/0x370 [ 36.383332] vm_area_dup+0x20/0x160 [ 36.383623] __split_vma+0x170/0x950 [ 36.383923] split_vma+0xc6/0x110 [ 36.384200] mprotect_fixup+0x8d2/0xb30 [ 36.384523] do_mprotect_pkey+0x87e/0xd40 [ 36.384857] __x64_sys_mprotect+0x78/0xc0 [ 36.385207] do_syscall_64+0x3f/0x90 [ 36.385523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.385934] [ 36.386074] Freed by task 214: [ 36.386331] kasan_save_stack+0x22/0x50 [ 36.386654] kasan_set_track+0x25/0x30 [ 36.386964] kasan_save_free_info+0x2b/0x50 [ 36.387310] __kasan_slab_free+0x10a/0x190 [ 36.387662] kmem_cache_free+0x10d/0x4d0 [ 36.387994] rcu_core+0x8c8/0x2860 [ 36.388283] __do_softirq+0x1b7/0x7d4 [ 36.388591] [ 36.388734] Last potentially related work creation: [ 36.389143] kasan_save_stack+0x22/0x50 [ 36.389464] __kasan_record_aux_stack+0x8e/0xa0 [ 36.389833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.390241] remove_vma+0x139/0x170 [ 36.390529] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.390893] do_vmi_munmap+0x1f1/0x2b0 [ 36.391202] __vm_munmap+0x138/0x3a0 [ 36.391506] __x64_sys_munmap+0x59/0x80 [ 36.391824] do_syscall_64+0x3f/0x90 [ 36.392123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.392519] [ 36.392647] Second to last potentially related work creation: [ 36.393067] kasan_save_stack+0x22/0x50 [ 36.393439] __kasan_record_aux_stack+0x8e/0xa0 [ 36.393840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.394284] remove_vma+0x139/0x170 [ 36.394578] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.394922] do_vmi_munmap+0x1f1/0x2b0 [ 36.395237] mmap_region+0x1f9/0x2660 [ 36.395550] do_mmap+0x854/0xf00 [ 36.395828] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.396139] ksys_mmap_pgoff+0x3af/0x500 [ 36.396460] do_syscall_64+0x3f/0x90 [ 36.396764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.397198] [ 36.397334] The buggy address belongs to the object at ffff88800feb5d98 [ 36.397334] which belongs to the cache vm_area_struct of size 168 [ 36.398270] The buggy address is located 88 bytes inside of [ 36.398270] freed 168-byte region [ffff88800feb5d98, ffff88800feb5e40) [ 36.399164] [ 36.399300] The buggy address belongs to the physical page: [ 36.399723] page:0000000081b797b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeb5 [ 36.400409] memcg:ffff888018c66401 [ 36.400687] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.401180] page_type: 0xffffffff() [ 36.401475] raw: 0100000000000200 ffff88800879fc80 ffffea000063d480 dead000000000008 [ 36.402059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c66401 [ 36.402638] page dumped because: kasan: bad access detected [ 36.403066] [ 36.403204] Memory state around the buggy address: [ 36.403573] ffff88800feb5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.404129] ffff88800feb5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.404682] >ffff88800feb5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.405252] ^ [ 36.405778] ffff88800feb5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.406329] ffff88800feb5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.406878] ================================================================== [ 36.407573] Disabling lock debugging due to kernel taint [ 38.280520] BUG: Bad rss-counter state mm:000000007215771c type:MM_FILEPAGES val:33 [ 38.281830] BUG: Bad rss-counter state mm:000000007215771c type:MM_ANONPAGES val:22 [ 38.659940] BUG: Bad rss-counter state mm:00000000b05a41cc type:MM_FILEPAGES val:33 [ 38.660689] BUG: Bad rss-counter state mm:00000000b05a41cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2030' (ECDSA) to the list of known hosts. 2023/06/20 09:01:34 fuzzer started 2023/06/20 09:01:35 dialing manager at localhost:44161 2023/06/20 09:01:35 checking machine... 2023/06/20 09:01:35 checking revisions... [ 39.222563] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:01:35 testing simple program... [ 39.266022] cgroup: Unknown subsys name 'net' [ 39.297922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:01:29 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff85652988 RCX=0000000080000101 RDX=1ffffffff0aca531 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800d7beb30 RIP=ffffffff814c07f1 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 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=00007fedd2c00338 CR3=000000000e79e000 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=2034333a31303a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a31303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186ccee RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015abfd01 RSI=ffff888015abfd40 RDI=ffff888015abfd40 RBP=ffff888015abf8e0 RSP=ffff888015abf810 R8 =ffffffff86141e7a R9 =ffff888015abf8c8 R10=0000000000038001 R11=00000000000229c7 R12=ffff888015abf8e8 R13=ffff888015abf8d0 R14=ffff888015abfd48 R15=ffff888015abf888 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f37723da900 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=00007f37729920b0 CR3=0000000009a34000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000