[ 28.092265] BUG: Bad rss-counter state mm:00000000527cad3e type:MM_FILEPAGES val:33 [ 28.092845] BUG: Bad rss-counter state mm:00000000527cad3e type:MM_ANONPAGES val:22 [ 28.233705] ================================================================== [ 28.234900] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.236093] Read of size 8 at addr ffff8880140ed798 by task sshd/218 [ 28.236940] [ 28.237176] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.238161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.239260] Call Trace: [ 28.239620] [ 28.239928] dump_stack_lvl+0x91/0xf0 [ 28.240470] print_report+0xcc/0x620 [ 28.240999] ? __virt_addr_valid+0x102/0x340 [ 28.241629] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.242295] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.242957] kasan_report+0xbe/0xf0 [ 28.243466] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.244102] vma_interval_tree_remove+0xc75/0xec0 [ 28.244728] vma_prepare+0xc54/0x11a0 [ 28.245220] __split_vma+0x5af/0x950 [ 28.245739] ? __pfx___split_vma+0x10/0x10 [ 28.246282] ? find_held_lock+0x2c/0x110 [ 28.246920] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.247519] ? lock_is_held_type+0x9f/0x120 [ 28.248074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.248712] ? mtree_range_walk+0x632/0x900 [ 28.249276] ? mas_walk+0x5c7/0x7c0 [ 28.249802] do_vmi_munmap+0x1f1/0x2b0 [ 28.250306] mmap_region+0x1f9/0x2660 [ 28.250824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.251348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.252096] ? __pfx_lock_acquire+0x10/0x10 [ 28.252687] ? __pfx_mmap_region+0x10/0x10 [ 28.253260] ? security_mmap_addr+0x7d/0xa0 [ 28.253872] ? get_unmapped_area+0x1f5/0x3f0 [ 28.254491] do_mmap+0x854/0xf00 [ 28.254972] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.255513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.256112] ksys_mmap_pgoff+0x3af/0x500 [ 28.256683] do_syscall_64+0x3f/0x90 [ 28.257204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.258090] RIP: 0033:0x7faca7516d82 [ 28.258653] 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 [ 28.260941] RSP: 002b:00007ffd8356e558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.261922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faca7516d82 [ 28.262855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faca6950000 [ 28.263787] RBP: 00007faca6950000 R08: 0000000000000009 R09: 0000000000001000 [ 28.264716] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d076a89f60 [ 28.265633] R13: 00007ffd8356e570 R14: 00007ffd8356e5a0 R15: 00007ffd8356e900 [ 28.266579] [ 28.266931] [ 28.267165] Allocated by task 211: [ 28.267634] kasan_save_stack+0x22/0x50 [ 28.268175] kasan_set_track+0x25/0x30 [ 28.268733] __kasan_slab_alloc+0x59/0x70 [ 28.269275] kmem_cache_alloc+0x16b/0x370 [ 28.269848] vm_area_dup+0x20/0x160 [ 28.270321] __split_vma+0x170/0x950 [ 28.270851] split_vma+0xc6/0x110 [ 28.271314] mprotect_fixup+0x8d2/0xb30 [ 28.271857] do_mprotect_pkey+0x87e/0xd40 [ 28.272428] __x64_sys_mprotect+0x78/0xc0 [ 28.272989] do_syscall_64+0x3f/0x90 [ 28.273505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.274188] [ 28.274443] Freed by task 211: [ 28.274861] kasan_save_stack+0x22/0x50 [ 28.275394] kasan_set_track+0x25/0x30 [ 28.275921] kasan_save_free_info+0x2b/0x50 [ 28.276514] __kasan_slab_free+0x10a/0x190 [ 28.277076] kmem_cache_free+0x10d/0x4d0 [ 28.277629] rcu_core+0x8c8/0x2860 [ 28.278097] __do_softirq+0x1b7/0x7d4 [ 28.278633] [ 28.278863] Last potentially related work creation: [ 28.279599] kasan_save_stack+0x22/0x50 [ 28.280325] __kasan_record_aux_stack+0x8e/0xa0 [ 28.281142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.282061] remove_vma+0x139/0x170 [ 28.282723] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.283516] do_vmi_munmap+0x1f1/0x2b0 [ 28.284182] __vm_munmap+0x138/0x3a0 [ 28.284697] __x64_sys_munmap+0x59/0x80 [ 28.285216] do_syscall_64+0x3f/0x90 [ 28.285765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.286484] [ 28.286705] The buggy address belongs to the object at ffff8880140ed740 [ 28.286705] which belongs to the cache vm_area_struct of size 168 [ 28.288283] The buggy address is located 88 bytes inside of [ 28.288283] freed 168-byte region [ffff8880140ed740, ffff8880140ed7e8) [ 28.289918] [ 28.290146] The buggy address belongs to the physical page: [ 28.290881] page:00000000c472968b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x140ed [ 28.292080] memcg:ffff888015a32b01 [ 28.292551] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.293251] page_type: 0xffffffff() [ 28.293748] raw: 0100000000000200 ffff88800879fc80 ffffea0000507c80 dead000000000002 [ 28.294741] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a32b01 [ 28.295719] page dumped because: kasan: bad access detected [ 28.296452] [ 28.296680] Memory state around the buggy address: [ 28.297285] ffff8880140ed680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.298212] ffff8880140ed700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.299351] >ffff8880140ed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.300346] ^ [ 28.300967] ffff8880140ed800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.301897] ffff8880140ed880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.302843] ================================================================== [ 28.304212] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.277017] BUG: Bad rss-counter state mm:000000008ca621c3 type:MM_FILEPAGES val:33 [ 30.278033] BUG: Bad rss-counter state mm:000000008ca621c3 type:MM_ANONPAGES val:22 [ 30.803385] BUG: Bad rss-counter state mm:0000000082681754 type:MM_FILEPAGES val:33 [ 30.804550] BUG: Bad rss-counter state mm:0000000082681754 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28217' (ECDSA) to the list of known hosts. 2023/06/19 19:39:16 fuzzer started 2023/06/19 19:39:16 dialing manager at localhost:44161 2023/06/19 19:39:16 checking machine... 2023/06/19 19:39:16 checking revisions... [ 31.431026] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:39:16 testing simple program... [ 31.469208] cgroup: Unknown subsys name 'net' [ 31.514293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888018008000 RSI=ffffffff81704b4e RDI=0000000000000005 RBP=ffffffff849ef220 RSP=ffff88800e6079a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000013b R13=ffffea00005c1fc0 R14=0000000000001000 R15=ffff88800e607db0 RIP=ffffffff814c081b 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 00007ff8fbb24900 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=00007ff8fc0d9650 CR3=000000000cdb8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 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=0000000000000001 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=00007ffd4ec9d5b8 CR3=0000000005482000 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=00007f44910545100000557df2d1e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000