[ 31.181110] BUG: Bad rss-counter state mm:0000000062551b48 type:MM_FILEPAGES val:33 [ 31.182106] BUG: Bad rss-counter state mm:0000000062551b48 type:MM_ANONPAGES val:22 [ 31.293923] ================================================================== [ 31.294577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.295270] Read of size 8 at addr ffff88800e248ed8 by task sshd/220 [ 31.295802] [ 31.295956] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.296568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297262] Call Trace: [ 31.297499] [ 31.297704] dump_stack_lvl+0x91/0xf0 [ 31.298050] print_report+0xcc/0x620 [ 31.298568] ? __virt_addr_valid+0x102/0x340 [ 31.298968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299840] kasan_report+0xbe/0xf0 [ 31.300184] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300649] vma_interval_tree_remove+0xc75/0xec0 [ 31.301083] vma_prepare+0xc54/0x11a0 [ 31.301458] __split_vma+0x5af/0x950 [ 31.301791] ? __pfx___split_vma+0x10/0x10 [ 31.302165] ? find_held_lock+0x2c/0x110 [ 31.302538] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.302963] ? lock_is_held_type+0x9f/0x120 [ 31.303342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.303795] ? mtree_range_walk+0x632/0x900 [ 31.304209] ? mas_walk+0x5c7/0x7c0 [ 31.304552] do_vmi_munmap+0x1f1/0x2b0 [ 31.304912] mmap_region+0x1f9/0x2660 [ 31.305257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.305636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.306152] ? __pfx_lock_acquire+0x10/0x10 [ 31.306530] ? __pfx_mmap_region+0x10/0x10 [ 31.306909] ? security_mmap_addr+0x7d/0xa0 [ 31.307283] ? get_unmapped_area+0x1f5/0x3f0 [ 31.307669] do_mmap+0x854/0xf00 [ 31.307996] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.308355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.308757] ksys_mmap_pgoff+0x3af/0x500 [ 31.309121] do_syscall_64+0x3f/0x90 [ 31.309471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309923] RIP: 0033:0x7f00d6515d82 [ 31.310249] 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 [ 31.311786] RSP: 002b:00007ffe06194ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.312433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00d6515d82 [ 31.313085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00d594f000 [ 31.313711] RBP: 00007f00d594f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.314319] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f6bb8bf70 [ 31.314922] R13: 00007ffe06194cc0 R14: 00007ffe06194cf0 R15: 00007ffe06195050 [ 31.315544] [ 31.315751] [ 31.315901] Allocated by task 213: [ 31.316216] kasan_save_stack+0x22/0x50 [ 31.316574] kasan_set_track+0x25/0x30 [ 31.316956] __kasan_slab_alloc+0x59/0x70 [ 31.317334] kmem_cache_alloc+0x16b/0x370 [ 31.317724] vm_area_dup+0x20/0x160 [ 31.318091] __split_vma+0x170/0x950 [ 31.318425] split_vma+0xc6/0x110 [ 31.318740] mprotect_fixup+0x8d2/0xb30 [ 31.319096] do_mprotect_pkey+0x87e/0xd40 [ 31.319467] __x64_sys_mprotect+0x78/0xc0 [ 31.319846] do_syscall_64+0x3f/0x90 [ 31.320186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320654] [ 31.320807] Freed by task 13: [ 31.321077] kasan_save_stack+0x22/0x50 [ 31.321458] kasan_set_track+0x25/0x30 [ 31.321835] kasan_save_free_info+0x2b/0x50 [ 31.322205] __kasan_slab_free+0x10a/0x190 [ 31.322580] kmem_cache_free+0x10d/0x4d0 [ 31.322989] rcu_core+0x8c8/0x2860 [ 31.323305] __do_softirq+0x1b7/0x7d4 [ 31.323650] [ 31.323805] Last potentially related work creation: [ 31.324229] kasan_save_stack+0x22/0x50 [ 31.324591] __kasan_record_aux_stack+0x8e/0xa0 [ 31.325003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.325482] remove_vma+0x139/0x170 [ 31.325809] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.326204] do_vmi_munmap+0x1f1/0x2b0 [ 31.326552] __vm_munmap+0x138/0x3a0 [ 31.326912] __x64_sys_munmap+0x59/0x80 [ 31.327266] do_syscall_64+0x3f/0x90 [ 31.327616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328122] [ 31.328274] Second to last potentially related work creation: [ 31.328767] kasan_save_stack+0x22/0x50 [ 31.329126] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330155] remove_vma+0x139/0x170 [ 31.330508] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.330924] do_vmi_munmap+0x1f1/0x2b0 [ 31.331279] mmap_region+0x1f9/0x2660 [ 31.331643] do_mmap+0x854/0xf00 [ 31.331961] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.332326] ksys_mmap_pgoff+0x3af/0x500 [ 31.332730] do_syscall_64+0x3f/0x90 [ 31.333090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333586] [ 31.333746] The buggy address belongs to the object at ffff88800e248e80 [ 31.333746] which belongs to the cache vm_area_struct of size 168 [ 31.334913] The buggy address is located 88 bytes inside of [ 31.334913] freed 168-byte region [ffff88800e248e80, ffff88800e248f28) [ 31.335993] [ 31.336155] The buggy address belongs to the physical page: [ 31.336641] page:00000000a694aa28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe248 [ 31.337461] memcg:ffff88800d64ba01 [ 31.337771] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.338238] page_type: 0xffffffff() [ 31.338564] raw: 0100000000000200 ffff8880087a0c80 ffffea00003890c0 dead000000000008 [ 31.339266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d64ba01 [ 31.340113] page dumped because: kasan: bad access detected [ 31.340597] [ 31.340752] Memory state around the buggy address: [ 31.341180] ffff88800e248d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.341845] ffff88800e248e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.342517] >ffff88800e248e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.343158] ^ [ 31.343716] ffff88800e248f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.344364] ffff88800e248f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.345017] ================================================================== [ 31.345779] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.982539] BUG: Bad rss-counter state mm:00000000b66805f9 type:MM_FILEPAGES val:33 [ 32.983292] BUG: Bad rss-counter state mm:00000000b66805f9 type:MM_ANONPAGES val:22 [ 33.282049] BUG: Bad rss-counter state mm:0000000086055123 type:MM_FILEPAGES val:33 [ 33.282855] BUG: Bad rss-counter state mm:0000000086055123 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48662' (ECDSA) to the list of known hosts. 2023/06/21 09:12:30 fuzzer started 2023/06/21 09:12:30 dialing manager at localhost:36067 2023/06/21 09:12:30 checking machine... 2023/06/21 09:12:30 checking revisions... [ 33.884721] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:12:31 testing simple program... [ 33.923266] cgroup: Unknown subsys name 'net' [ 33.956778] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:12:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801c978e88 RCX=1ffff1100392f118 RDX=1ffff1100392f1d1 RSI=ffffffff87b89f80 RDI=ffff88801a144770 RBP=ffff88801c979000 RSP=ffff888008d9fcc8 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=0000000000000283 R13=ffff88801a144768 R14=ffffffff818d9c06 R15=ffff88800d955b80 RIP=ffffffff84519679 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 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=00007ffd8243a000 CR3=0000000009894000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff84537da7 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 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=00007f903c173200 CR3=000000000cffc000 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=9d9c43147c6dd38d04420217a54ce329 XMM02=000000000011bdc8ec2efd57dc4c00df XMM03=0000000000122380097b33aa8fcd26ab XMM04=c2b40268227bf74500000000000ae988 XMM05=19e9129bd510f23500000000001331e0 XMM06=2233d700b506548b00000000001323b8 XMM07=e042d86d42eb936e0000000000122658 XMM08=097b33aa8fcd26ab000000000011be28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000