[ 40.273115] BUG: Bad rss-counter state mm:000000000d94e845 type:MM_FILEPAGES val:33 [ 40.273991] BUG: Bad rss-counter state mm:000000000d94e845 type:MM_ANONPAGES val:22 [ 40.361793] ================================================================== [ 40.362860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.363967] Read of size 8 at addr ffff88800e0343f8 by task sshd/219 [ 40.364876] [ 40.365150] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.366329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.367481] Call Trace: [ 40.367863] [ 40.368226] dump_stack_lvl+0x91/0xf0 [ 40.368808] print_report+0xcc/0x620 [ 40.369225] ? __virt_addr_valid+0x102/0x340 [ 40.369528] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.369866] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.370212] kasan_report+0xbe/0xf0 [ 40.370471] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.370812] vma_interval_tree_remove+0xc75/0xec0 [ 40.371155] vma_prepare+0xc54/0x11a0 [ 40.371438] __split_vma+0x5af/0x950 [ 40.371715] ? __pfx___split_vma+0x10/0x10 [ 40.372028] ? find_held_lock+0x2c/0x110 [ 40.372348] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.372684] ? lock_is_held_type+0x9f/0x120 [ 40.373005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.373364] ? mtree_range_walk+0x632/0x900 [ 40.373695] ? mas_walk+0x5c7/0x7c0 [ 40.373974] do_vmi_munmap+0x1f1/0x2b0 [ 40.374259] mmap_region+0x1f9/0x2660 [ 40.374542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.374847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.375268] ? __pfx_lock_acquire+0x10/0x10 [ 40.375590] ? __pfx_mmap_region+0x10/0x10 [ 40.375905] ? security_mmap_addr+0x7d/0xa0 [ 40.376219] ? get_unmapped_area+0x1f5/0x3f0 [ 40.376533] do_mmap+0x854/0xf00 [ 40.376796] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.377098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.377423] ksys_mmap_pgoff+0x3af/0x500 [ 40.377710] do_syscall_64+0x3f/0x90 [ 40.377993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.378374] RIP: 0033:0x7fac52556d82 [ 40.378649] 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 [ 40.379910] RSP: 002b:00007ffdedef8668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.380444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac52556d82 [ 40.380949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac51990000 [ 40.381449] RBP: 00007fac51990000 R08: 0000000000000009 R09: 0000000000001000 [ 40.381945] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f17e86cf70 [ 40.382435] R13: 00007ffdedef8680 R14: 00007ffdedef86b0 R15: 00007ffdedef8a10 [ 40.382942] [ 40.383107] [ 40.383235] Allocated by task 211: [ 40.383492] kasan_save_stack+0x22/0x50 [ 40.383784] kasan_set_track+0x25/0x30 [ 40.384069] __kasan_slab_alloc+0x59/0x70 [ 40.384381] kmem_cache_alloc+0x16b/0x370 [ 40.384686] vm_area_dup+0x20/0x160 [ 40.384968] __split_vma+0x170/0x950 [ 40.385244] split_vma+0xc6/0x110 [ 40.385500] mprotect_fixup+0x8d2/0xb30 [ 40.385794] do_mprotect_pkey+0x87e/0xd40 [ 40.386103] __x64_sys_mprotect+0x78/0xc0 [ 40.386406] do_syscall_64+0x3f/0x90 [ 40.386680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.387049] [ 40.387170] Freed by task 203: [ 40.387406] kasan_save_stack+0x22/0x50 [ 40.387701] kasan_set_track+0x25/0x30 [ 40.387988] kasan_save_free_info+0x2b/0x50 [ 40.388297] __kasan_slab_free+0x10a/0x190 [ 40.388600] kmem_cache_free+0x10d/0x4d0 [ 40.388900] rcu_core+0x8c8/0x2860 [ 40.389165] __do_softirq+0x1b7/0x7d4 [ 40.389444] [ 40.389572] Last potentially related work creation: [ 40.389918] kasan_save_stack+0x22/0x50 [ 40.390211] __kasan_record_aux_stack+0x8e/0xa0 [ 40.390557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.390931] remove_vma+0x139/0x170 [ 40.391205] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.391518] do_vmi_munmap+0x1f1/0x2b0 [ 40.391808] __vm_munmap+0x138/0x3a0 [ 40.392083] __x64_sys_munmap+0x59/0x80 [ 40.392373] do_syscall_64+0x3f/0x90 [ 40.392650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.393026] [ 40.393153] The buggy address belongs to the object at ffff88800e0343a0 [ 40.393153] which belongs to the cache vm_area_struct of size 168 [ 40.394010] The buggy address is located 88 bytes inside of [ 40.394010] freed 168-byte region [ffff88800e0343a0, ffff88800e034448) [ 40.394838] [ 40.394964] The buggy address belongs to the physical page: [ 40.395357] page:000000001a1be87a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe034 [ 40.395989] memcg:ffff88801a3fd801 [ 40.396243] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.396620] page_type: 0xffffffff() [ 40.396882] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.397445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3fd801 [ 40.397982] page dumped because: kasan: bad access detected [ 40.398366] [ 40.398488] Memory state around the buggy address: [ 40.398821] ffff88800e034280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.399326] ffff88800e034300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.399826] >ffff88800e034380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.400320] ^ [ 40.400804] ffff88800e034400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.401300] ffff88800e034480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.401800] ================================================================== [ 40.402339] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.301079] BUG: Bad rss-counter state mm:00000000638f7246 type:MM_FILEPAGES val:33 [ 42.302071] BUG: Bad rss-counter state mm:00000000638f7246 type:MM_ANONPAGES val:22 [ 42.797369] BUG: Bad rss-counter state mm:000000004027c9f8 type:MM_FILEPAGES val:33 [ 42.798393] BUG: Bad rss-counter state mm:000000004027c9f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35401' (ECDSA) to the list of known hosts. 2023/06/19 21:54:17 fuzzer started 2023/06/19 21:54:17 dialing manager at localhost:44161 2023/06/19 21:54:17 checking machine... 2023/06/19 21:54:17 checking revisions... [ 43.410539] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:54:18 testing simple program... [ 43.455318] cgroup: Unknown subsys name 'net' [ 43.495003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:08 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801cabf718 RSI=ffff88801cabf6e0 RDI=ffff88801cabf4a0 RBP=ffff88801cab8000 RSP=ffff88801cabf460 R8 =0000000000000001 R9 =ffff88801cabf4d0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88801cabf4f0 R13=ffff88801cabf4d8 R14=ffff88801cabf6e0 R15=ffff88801cabf490 RIP=ffffffff81130930 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 00007ff92934e900 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=00007ff929905618 CR3=000000000def0000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39518 RCX=ffffffff812d869a RDX=1ffff1100d9e72a2 RSI=ffff888008d71b40 RDI=ffff888008d751c0 RBP=ffff888008e27e58 RSP=ffff888008e27d20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806cf39500 R13=ffff888008d751c0 R14=ffff888008d71fe8 R15=ffff888008d71b40 RIP=ffffffff810044b4 RFL=00000046 [---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 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=00007f82808c2140 CR3=000000000e396000 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=4750d27f0b01d1825d440f33c1c0191c XMM02=000000000011d4f8ec2efd57dc4c00df XMM03=0000000000123eb824f9e688263fe422 XMM04=7964a1576248782500000000000ae988 XMM05=dfcdbad4f1609c370000000000133808 XMM06=806171799158d9670000000000133690 XMM07=e042d86d42eb936e0000000000124190 XMM08=24f9e688263fe422000000000011d558 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000