[ 35.263336] BUG: Bad rss-counter state mm:00000000047c9d01 type:MM_FILEPAGES val:33 [ 35.264445] BUG: Bad rss-counter state mm:00000000047c9d01 type:MM_ANONPAGES val:22 [ 35.428203] ================================================================== [ 35.429149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.430116] Read of size 8 at addr ffff88800e0deed8 by task sshd/219 [ 35.430917] [ 35.431190] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.432175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.433188] Call Trace: [ 35.433536] [ 35.433839] dump_stack_lvl+0x91/0xf0 [ 35.434341] print_report+0xcc/0x620 [ 35.434829] ? __virt_addr_valid+0x102/0x340 [ 35.435389] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.436008] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.436642] kasan_report+0xbe/0xf0 [ 35.437122] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.437770] vma_interval_tree_remove+0xc75/0xec0 [ 35.438388] vma_prepare+0xc54/0x11a0 [ 35.438872] __split_vma+0x5af/0x950 [ 35.439348] ? __pfx___split_vma+0x10/0x10 [ 35.439880] ? find_held_lock+0x2c/0x110 [ 35.440423] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.441003] ? lock_is_held_type+0x9f/0x120 [ 35.441554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.442192] ? mtree_range_walk+0x632/0x900 [ 35.442751] ? mas_walk+0x5c7/0x7c0 [ 35.443227] do_vmi_munmap+0x1f1/0x2b0 [ 35.443724] mmap_region+0x1f9/0x2660 [ 35.444215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.444737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.445455] ? __pfx_lock_acquire+0x10/0x10 [ 35.446018] ? __pfx_mmap_region+0x10/0x10 [ 35.446562] ? security_mmap_addr+0x7d/0xa0 [ 35.447101] ? get_unmapped_area+0x1f5/0x3f0 [ 35.447664] do_mmap+0x854/0xf00 [ 35.448112] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.448657] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.449293] ksys_mmap_pgoff+0x3af/0x500 [ 35.449828] do_syscall_64+0x3f/0x90 [ 35.450317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.450974] RIP: 0033:0x7f6300debd82 [ 35.451439] 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 [ 35.453591] RSP: 002b:00007ffd0880a4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.454515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6300debd82 [ 35.455375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6300225000 [ 35.456248] RBP: 00007f6300225000 R08: 0000000000000009 R09: 0000000000001000 [ 35.457104] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636de34cd90 [ 35.457986] R13: 00007ffd0880a4d0 R14: 00007ffd0880a500 R15: 00007ffd0880a860 [ 35.458857] [ 35.459155] [ 35.459375] Allocated by task 212: [ 35.459818] kasan_save_stack+0x22/0x50 [ 35.460335] kasan_set_track+0x25/0x30 [ 35.460838] __kasan_slab_alloc+0x59/0x70 [ 35.461372] kmem_cache_alloc+0x16b/0x370 [ 35.461900] vm_area_dup+0x20/0x160 [ 35.462364] __split_vma+0x170/0x950 [ 35.462837] split_vma+0xc6/0x110 [ 35.463284] mprotect_fixup+0x8d2/0xb30 [ 35.463795] do_mprotect_pkey+0x87e/0xd40 [ 35.464322] __x64_sys_mprotect+0x78/0xc0 [ 35.464848] do_syscall_64+0x3f/0x90 [ 35.465331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.466006] [ 35.466225] Freed by task 13: [ 35.466619] kasan_save_stack+0x22/0x50 [ 35.467135] kasan_set_track+0x25/0x30 [ 35.467653] kasan_save_free_info+0x2b/0x50 [ 35.468200] __kasan_slab_free+0x10a/0x190 [ 35.468749] kmem_cache_free+0x10d/0x4d0 [ 35.469267] rcu_core+0x8c8/0x2860 [ 35.469724] __do_softirq+0x1b7/0x7d4 [ 35.470199] [ 35.470416] Last potentially related work creation: [ 35.471008] kasan_save_stack+0x22/0x50 [ 35.471524] __kasan_record_aux_stack+0x8e/0xa0 [ 35.472100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.472748] remove_vma+0x139/0x170 [ 35.473204] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.473776] do_vmi_munmap+0x1f1/0x2b0 [ 35.474271] __vm_munmap+0x138/0x3a0 [ 35.474744] __x64_sys_munmap+0x59/0x80 [ 35.475242] do_syscall_64+0x3f/0x90 [ 35.475720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.476373] [ 35.476591] The buggy address belongs to the object at ffff88800e0dee80 [ 35.476591] which belongs to the cache vm_area_struct of size 168 [ 35.478107] The buggy address is located 88 bytes inside of [ 35.478107] freed 168-byte region [ffff88800e0dee80, ffff88800e0def28) [ 35.479493] [ 35.479707] The buggy address belongs to the physical page: [ 35.480364] page:0000000071ced2b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0de [ 35.481441] memcg:ffff88800eae6701 [ 35.481874] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.482522] page_type: 0xffffffff() [ 35.482979] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3e80 dead000000000002 [ 35.483902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae6701 [ 35.484795] page dumped because: kasan: bad access detected [ 35.485460] [ 35.485682] Memory state around the buggy address: [ 35.486270] ffff88800e0ded80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.487119] ffff88800e0dee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.487973] >ffff88800e0dee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.488826] ^ [ 35.489550] ffff88800e0def00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.490422] ffff88800e0def80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.491266] ================================================================== [ 35.492556] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.185701] BUG: Bad rss-counter state mm:000000000be889f6 type:MM_FILEPAGES val:33 [ 38.186623] BUG: Bad rss-counter state mm:000000000be889f6 type:MM_ANONPAGES val:22 [ 38.680154] BUG: Bad rss-counter state mm:00000000fcf95acc type:MM_FILEPAGES val:33 [ 38.681149] BUG: Bad rss-counter state mm:00000000fcf95acc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33332' (ECDSA) to the list of known hosts. 2023/06/19 23:28:55 fuzzer started 2023/06/19 23:28:55 dialing manager at localhost:44161 2023/06/19 23:28:55 checking machine... 2023/06/19 23:28:55 checking revisions... [ 39.435263] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:28:55 testing simple program... [ 39.491778] cgroup: Unknown subsys name 'net' [ 39.597228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:43 Registers: info registers vcpu 0 RAX=ffffffff8120674f RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7ff01 RSI=ffff888008d7ff18 RDI=ffff888008d7ff18 RBP=ffff888008d7f9d0 RSP=ffff888008d7f900 R8 =ffffffff860aefca R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7ff20 R15=ffff888008d7f978 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 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=00007f736ba9ca00 CR3=00000000097ba000 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=ffffffffffffffffffffffffffffffff XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0d4302a7d503f07a00000000000ae988 XMM05=c511f40ab0e1bec900000000001346b0 XMM06=806171799158d9670000000000133130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f9c94a130b0 CR3=0000000019dd8000 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=2034353a38323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000