Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.087528] BUG: Bad rss-counter state mm:000000000d28af34 type:MM_FILEPAGES val:33 [ 26.088720] BUG: Bad rss-counter state mm:000000000d28af34 type:MM_ANONPAGES val:22 [ 26.131157] ================================================================== [ 26.132050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.133208] Read of size 8 at addr ffff88800ca9fc20 by task sshd/219 [ 26.134073] [ 26.134313] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.135164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.136132] Call Trace: [ 26.136452] [ 26.136734] dump_stack_lvl+0x91/0xf0 [ 26.137227] print_report+0xcc/0x620 [ 26.137704] ? __virt_addr_valid+0x102/0x340 [ 26.138257] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.138873] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.139504] kasan_report+0xbe/0xf0 [ 26.140010] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.140674] vma_interval_tree_remove+0xc75/0xec0 [ 26.141318] vma_prepare+0xc54/0x11a0 [ 26.141830] __split_vma+0x5af/0x950 [ 26.142366] ? __pfx___split_vma+0x10/0x10 [ 26.142932] ? find_held_lock+0x2c/0x110 [ 26.143488] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.144100] ? lock_is_held_type+0x9f/0x120 [ 26.144674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.145321] ? mtree_range_walk+0x632/0x900 [ 26.145908] ? mas_walk+0x5c7/0x7c0 [ 26.146423] do_vmi_munmap+0x1f1/0x2b0 [ 26.146944] mmap_region+0x1f9/0x2660 [ 26.147454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.148003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.148769] ? __pfx_lock_acquire+0x10/0x10 [ 26.149336] ? __pfx_mmap_region+0x10/0x10 [ 26.149902] ? security_mmap_addr+0x7d/0xa0 [ 26.150494] ? get_unmapped_area+0x1f5/0x3f0 [ 26.151080] do_mmap+0x854/0xf00 [ 26.151549] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.152073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.152659] ksys_mmap_pgoff+0x3af/0x500 [ 26.153195] do_syscall_64+0x3f/0x90 [ 26.153687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.154378] RIP: 0033:0x7f34405abd82 [ 26.154855] 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 [ 26.157070] RSP: 002b:00007ffcae8f4928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.158012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34405abd82 [ 26.158914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f343f9e5000 [ 26.159788] RBP: 00007f343f9e5000 R08: 0000000000000009 R09: 0000000000001000 [ 26.160672] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634a6731f60 [ 26.161563] R13: 00007ffcae8f4940 R14: 00007ffcae8f4970 R15: 00007ffcae8f4cd0 [ 26.162451] [ 26.162750] [ 26.162970] Allocated by task 212: [ 26.163413] kasan_save_stack+0x22/0x50 [ 26.163936] kasan_set_track+0x25/0x30 [ 26.164451] __kasan_slab_alloc+0x59/0x70 [ 26.164996] kmem_cache_alloc+0x16b/0x370 [ 26.165530] vm_area_dup+0x20/0x160 [ 26.166009] __split_vma+0x170/0x950 [ 26.166517] split_vma+0xc6/0x110 [ 26.166978] mprotect_fixup+0x8d2/0xb30 [ 26.167497] do_mprotect_pkey+0x87e/0xd40 [ 26.168038] __x64_sys_mprotect+0x78/0xc0 [ 26.168582] do_syscall_64+0x3f/0x90 [ 26.169072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.169741] [ 26.169966] Freed by task 212: [ 26.170383] kasan_save_stack+0x22/0x50 [ 26.170908] kasan_set_track+0x25/0x30 [ 26.171429] kasan_save_free_info+0x2b/0x50 [ 26.172072] __kasan_slab_free+0x10a/0x190 [ 26.172629] kmem_cache_free+0x10d/0x4d0 [ 26.173159] rcu_core+0x8c8/0x2860 [ 26.173616] __do_softirq+0x1b7/0x7d4 [ 26.174119] [ 26.174359] Last potentially related work creation: [ 26.174968] kasan_save_stack+0x22/0x50 [ 26.175490] __kasan_record_aux_stack+0x8e/0xa0 [ 26.176080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.176755] remove_vma+0x139/0x170 [ 26.177227] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.177807] do_vmi_munmap+0x1f1/0x2b0 [ 26.178325] __vm_munmap+0x138/0x3a0 [ 26.178810] __x64_sys_munmap+0x59/0x80 [ 26.179327] do_syscall_64+0x3f/0x90 [ 26.179816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.180482] [ 26.180705] The buggy address belongs to the object at ffff88800ca9fbc8 [ 26.180705] which belongs to the cache vm_area_struct of size 168 [ 26.182247] The buggy address is located 88 bytes inside of [ 26.182247] freed 168-byte region [ffff88800ca9fbc8, ffff88800ca9fc70) [ 26.183708] [ 26.183927] The buggy address belongs to the physical page: [ 26.184618] page:00000000d40fe223 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca9f [ 26.185744] memcg:ffff88800d112d01 [ 26.186185] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.186871] page_type: 0xffffffff() [ 26.187341] raw: 0100000000000200 ffff88800879fc80 ffffea00003a47c0 dead000000000004 [ 26.188301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d112d01 [ 26.189245] page dumped because: kasan: bad access detected [ 26.189933] [ 26.190155] Memory state around the buggy address: [ 26.190776] ffff88800ca9fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.191668] ffff88800ca9fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 26.192559] >ffff88800ca9fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.193440] ^ [ 26.193991] ffff88800ca9fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 26.194885] ffff88800ca9fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 26.195770] ================================================================== [ 26.196713] Disabling lock debugging due to kernel taint [ 28.181007] BUG: Bad rss-counter state mm:00000000b734af7a type:MM_FILEPAGES val:33 [ 28.181945] BUG: Bad rss-counter state mm:00000000b734af7a type:MM_ANONPAGES val:22 [ 28.656318] BUG: Bad rss-counter state mm:00000000b81a0fb5 type:MM_FILEPAGES val:33 [ 28.658022] BUG: Bad rss-counter state mm:00000000b81a0fb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51211' (ECDSA) to the list of known hosts. 2023/06/19 13:35:53 fuzzer started 2023/06/19 13:35:53 dialing manager at localhost:44161 2023/06/19 13:35:53 checking machine... 2023/06/19 13:35:53 checking revisions... [ 29.400083] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:53 testing simple program... [ 29.436075] cgroup: Unknown subsys name 'net' [ 29.480055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f56b8575d70 CR3=000000000e566000 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=2032353a35333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=7fffffffffffffff RBX=00005588a42f5f80 RCX=0000000000000013 RDX=0000000000000afd RSI=000000000000000a RDI=00005588a43043d3 RBP=00007ffe02a20f00 RSP=00007ffe02a20ea0 R8 =00005588a43043d3 R9 =00007f125c54dbe0 R10=0000000000000100 R11=0000000000000246 R12=00007f125bf9b900 R13=00005588a43043d4 R14=0000000000000002 R15=0000000000000000 RIP=00007f125c404833 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f125bf9b900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe02a1b000 CR3=000000000f0ea000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=00000000000000000000000000000000 XMM03=697472617473202c7369206863696877 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=73202c6e69676f6c2020202020202023 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000