[ 31.236773] BUG: Bad rss-counter state mm:00000000c265dcd5 type:MM_FILEPAGES val:33 [ 31.238023] BUG: Bad rss-counter state mm:00000000c265dcd5 type:MM_ANONPAGES val:22 [ 31.277566] ================================================================== [ 31.278639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.279639] Read of size 8 at addr ffff88800eebadf0 by task sshd/219 [ 31.280473] [ 31.280710] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.281619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.282661] Call Trace: [ 31.282999] [ 31.283302] dump_stack_lvl+0x91/0xf0 [ 31.283827] print_report+0xcc/0x620 [ 31.284340] ? __virt_addr_valid+0x102/0x340 [ 31.284919] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286231] kasan_report+0xbe/0xf0 [ 31.286766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287424] vma_interval_tree_remove+0xc75/0xec0 [ 31.288071] vma_prepare+0xc54/0x11a0 [ 31.288585] __split_vma+0x5af/0x950 [ 31.289088] ? __pfx___split_vma+0x10/0x10 [ 31.289652] ? find_held_lock+0x2c/0x110 [ 31.290211] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.290839] ? lock_is_held_type+0x9f/0x120 [ 31.291416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.292062] ? mtree_range_walk+0x632/0x900 [ 31.292665] ? mas_walk+0x5c7/0x7c0 [ 31.293170] do_vmi_munmap+0x1f1/0x2b0 [ 31.293697] mmap_region+0x1f9/0x2660 [ 31.294209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.294764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.295525] ? __pfx_lock_acquire+0x10/0x10 [ 31.296100] ? __pfx_mmap_region+0x10/0x10 [ 31.296672] ? security_mmap_addr+0x7d/0xa0 [ 31.297237] ? get_unmapped_area+0x1f5/0x3f0 [ 31.297815] do_mmap+0x854/0xf00 [ 31.298279] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.298815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.299410] ksys_mmap_pgoff+0x3af/0x500 [ 31.299945] do_syscall_64+0x3f/0x90 [ 31.300455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301141] RIP: 0033:0x7ff8afb5ad82 [ 31.301624] 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 [ 31.303936] RSP: 002b:00007ffdc6d9eee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.304904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8afb5ad82 [ 31.305807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8aef94000 [ 31.306715] RBP: 00007ff8aef94000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559628f83b20 [ 31.308519] R13: 00007ffdc6d9ef00 R14: 00007ffdc6d9ef30 R15: 00007ffdc6d9f290 [ 31.309429] [ 31.309738] [ 31.309966] Allocated by task 211: [ 31.310424] kasan_save_stack+0x22/0x50 [ 31.310971] kasan_set_track+0x25/0x30 [ 31.311498] __kasan_slab_alloc+0x59/0x70 [ 31.312058] kmem_cache_alloc+0x16b/0x370 [ 31.312607] vm_area_dup+0x20/0x160 [ 31.313088] __split_vma+0x170/0x950 [ 31.313589] split_vma+0xc6/0x110 [ 31.314055] mprotect_fixup+0x8d2/0xb30 [ 31.314591] do_mprotect_pkey+0x87e/0xd40 [ 31.315175] __x64_sys_mprotect+0x78/0xc0 [ 31.315729] do_syscall_64+0x3f/0x90 [ 31.316236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316928] [ 31.317157] Freed by task 19: [ 31.317566] kasan_save_stack+0x22/0x50 [ 31.318102] kasan_set_track+0x25/0x30 [ 31.318633] kasan_save_free_info+0x2b/0x50 [ 31.319213] __kasan_slab_free+0x10a/0x190 [ 31.319782] kmem_cache_free+0x10d/0x4d0 [ 31.320324] rcu_core+0x8c8/0x2860 [ 31.320796] __do_softirq+0x1b7/0x7d4 [ 31.321309] [ 31.321538] Last potentially related work creation: [ 31.322160] kasan_save_stack+0x22/0x50 [ 31.322702] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324001] remove_vma+0x139/0x170 [ 31.324480] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325073] do_vmi_munmap+0x1f1/0x2b0 [ 31.325596] __vm_munmap+0x138/0x3a0 [ 31.326091] __x64_sys_munmap+0x59/0x80 [ 31.326636] do_syscall_64+0x3f/0x90 [ 31.327148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327838] [ 31.328067] Second to last potentially related work creation: [ 31.328799] kasan_save_stack+0x22/0x50 [ 31.329336] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330632] remove_vma+0x139/0x170 [ 31.331116] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331717] do_vmi_munmap+0x1f1/0x2b0 [ 31.332234] mmap_region+0x1f9/0x2660 [ 31.332748] do_mmap+0x854/0xf00 [ 31.333206] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.333729] ksys_mmap_pgoff+0x3af/0x500 [ 31.334265] do_syscall_64+0x3f/0x90 [ 31.334780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335466] [ 31.335697] The buggy address belongs to the object at ffff88800eebad98 [ 31.335697] which belongs to the cache vm_area_struct of size 168 [ 31.337263] The buggy address is located 88 bytes inside of [ 31.337263] freed 168-byte region [ffff88800eebad98, ffff88800eebae40) [ 31.338774] [ 31.339004] The buggy address belongs to the physical page: [ 31.339705] page:00000000620b0868 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeba [ 31.340852] memcg:ffff88800df5fa01 [ 31.341308] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.341995] page_type: 0xffffffff() [ 31.342477] raw: 0100000000000200 ffff8880087a0c80 ffffea000034ee40 dead000000000006 [ 31.343462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df5fa01 [ 31.344427] page dumped because: kasan: bad access detected [ 31.345129] [ 31.345365] Memory state around the buggy address: [ 31.345985] ffff88800eebac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.346920] ffff88800eebad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.347834] >ffff88800eebad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.348739] ^ [ 31.349604] ffff88800eebae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.350513] ffff88800eebae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.351425] ================================================================== [ 31.352491] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.232689] BUG: Bad rss-counter state mm:00000000ecb5a4ba type:MM_FILEPAGES val:33 [ 33.233444] BUG: Bad rss-counter state mm:00000000ecb5a4ba type:MM_ANONPAGES val:22 [ 33.642247] BUG: Bad rss-counter state mm:00000000571bc321 type:MM_FILEPAGES val:33 [ 33.643357] BUG: Bad rss-counter state mm:00000000571bc321 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20728' (ECDSA) to the list of known hosts. 2023/06/20 23:02:01 fuzzer started 2023/06/20 23:02:01 dialing manager at localhost:36067 2023/06/20 23:02:01 checking machine... 2023/06/20 23:02:01 checking revisions... [ 34.351184] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:02:01 testing simple program... [ 34.401651] cgroup: Unknown subsys name 'net' [ 34.438946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f81b6f536c0 CR3=000000000fd52000 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=2031303a32303a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a32303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002ce7eaa RBX=1ffff11002ce7eaa RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf42a70 RBP=0000000000000001 RSP=ffff88801673f540 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf42a70 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000086 [--S--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 00007f318c9d7900 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=00007f318cf8e618 CR3=000000000e454000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000