[ 24.010391] BUG: Bad rss-counter state mm:00000000493048a1 type:MM_FILEPAGES val:33 [ 24.011553] BUG: Bad rss-counter state mm:00000000493048a1 type:MM_ANONPAGES val:22 [ 24.139876] ================================================================== [ 24.140788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.141738] Read of size 8 at addr ffff888015ad3880 by task sshd/219 [ 24.142509] [ 24.142728] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.143801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.144789] Call Trace: [ 24.145114] <TASK> [ 24.145407] dump_stack_lvl+0x91/0xf0 [ 24.145920] print_report+0xcc/0x620 [ 24.146412] ? __virt_addr_valid+0x102/0x340 [ 24.146968] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147603] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.148222] kasan_report+0xbe/0xf0 [ 24.148703] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.149342] vma_interval_tree_remove+0xc75/0xec0 [ 24.149944] vma_prepare+0xc54/0x11a0 [ 24.150431] __split_vma+0x5af/0x950 [ 24.150906] ? __pfx___split_vma+0x10/0x10 [ 24.151447] ? find_held_lock+0x2c/0x110 [ 24.151973] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.152544] ? lock_is_held_type+0x9f/0x120 [ 24.153086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.153699] ? mtree_range_walk+0x632/0x900 [ 24.154249] ? mas_walk+0x5c7/0x7c0 [ 24.154729] do_vmi_munmap+0x1f1/0x2b0 [ 24.155250] mmap_region+0x1f9/0x2660 [ 24.155742] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.156271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.157027] ? __pfx_lock_acquire+0x10/0x10 [ 24.157589] ? __pfx_mmap_region+0x10/0x10 [ 24.158150] ? security_mmap_addr+0x7d/0xa0 [ 24.158715] ? get_unmapped_area+0x1f5/0x3f0 [ 24.159314] do_mmap+0x854/0xf00 [ 24.159778] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.160301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.160902] ksys_mmap_pgoff+0x3af/0x500 [ 24.161440] do_syscall_64+0x3f/0x90 [ 24.161945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.162621] RIP: 0033:0x7f678c7b1d82 [ 24.163114] 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 [ 24.165362] RSP: 002b:00007ffc8b4ed158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.166314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f678c7b1d82 [ 24.167223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f678bbeb000 [ 24.168117] RBP: 00007f678bbeb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.169013] R10: 0000000000000812 R11: 0000000000000206 R12: 000056176b719980 [ 24.169911] R13: 00007ffc8b4ed170 R14: 00007ffc8b4ed1a0 R15: 00007ffc8b4ed500 [ 24.170807] </TASK> [ 24.171120] [ 24.171347] Allocated by task 212: [ 24.171801] kasan_save_stack+0x22/0x50 [ 24.172332] kasan_set_track+0x25/0x30 [ 24.172848] __kasan_slab_alloc+0x59/0x70 [ 24.173392] kmem_cache_alloc+0x16b/0x370 [ 24.173936] vm_area_dup+0x20/0x160 [ 24.174416] __split_vma+0x170/0x950 [ 24.174902] split_vma+0xc6/0x110 [ 24.175372] mprotect_fixup+0x8d2/0xb30 [ 24.175903] do_mprotect_pkey+0x87e/0xd40 [ 24.176454] __x64_sys_mprotect+0x78/0xc0 [ 24.177007] do_syscall_64+0x3f/0x90 [ 24.177504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.178175] [ 24.178402] Freed by task 201: [ 24.178825] kasan_save_stack+0x22/0x50 [ 24.179360] kasan_set_track+0x25/0x30 [ 24.179885] kasan_save_free_info+0x2b/0x50 [ 24.180442] __kasan_slab_free+0x10a/0x190 [ 24.181002] kmem_cache_free+0x10d/0x4d0 [ 24.181541] rcu_core+0x8c8/0x2860 [ 24.182007] __do_softirq+0x1b7/0x7d4 [ 24.182512] [ 24.182735] Last potentially related work creation: [ 24.183370] kasan_save_stack+0x22/0x50 [ 24.183906] __kasan_record_aux_stack+0x8e/0xa0 [ 24.184506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.185248] remove_vma+0x139/0x170 [ 24.185723] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.186313] do_vmi_munmap+0x1f1/0x2b0 [ 24.186827] __vm_munmap+0x138/0x3a0 [ 24.187330] __x64_sys_munmap+0x59/0x80 [ 24.187856] do_syscall_64+0x3f/0x90 [ 24.188364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.189044] [ 24.189272] Second to last potentially related work creation: [ 24.190001] kasan_save_stack+0x22/0x50 [ 24.190531] __kasan_record_aux_stack+0x8e/0xa0 [ 24.191148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.191820] remove_vma+0x139/0x170 [ 24.192294] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.192879] do_vmi_munmap+0x1f1/0x2b0 [ 24.193399] mmap_region+0x1f9/0x2660 [ 24.193908] do_mmap+0x854/0xf00 [ 24.194364] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.194881] ksys_mmap_pgoff+0x3af/0x500 [ 24.195433] do_syscall_64+0x3f/0x90 [ 24.195933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.196603] [ 24.196826] The buggy address belongs to the object at ffff888015ad3828 [ 24.196826] which belongs to the cache vm_area_struct of size 168 [ 24.198385] The buggy address is located 88 bytes inside of [ 24.198385] freed 168-byte region [ffff888015ad3828, ffff888015ad38d0) [ 24.199878] [ 24.200105] The buggy address belongs to the physical page: [ 24.200808] page:00000000024bb1bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ad3 [ 24.201956] memcg:ffff8880096aae01 [ 24.202413] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.203172] page_type: 0xffffffff() [ 24.203645] raw: 0100000000000200 ffff88800879fc80 ffffea0000397f80 dead000000000003 [ 24.204615] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096aae01 [ 24.205576] page dumped because: kasan: bad access detected [ 24.206267] [ 24.206490] Memory state around the buggy address: [ 24.207103] ffff888015ad3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.208008] ffff888015ad3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.208907] >ffff888015ad3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.209800] ^ [ 24.210236] ffff888015ad3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.211158] ffff888015ad3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.212055] ================================================================== [ 24.213090] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.662854] BUG: Bad rss-counter state mm:0000000088f4b2e5 type:MM_FILEPAGES val:33 [ 25.663948] BUG: Bad rss-counter state mm:0000000088f4b2e5 type:MM_ANONPAGES val:22 [ 26.099648] BUG: Bad rss-counter state mm:000000003832563d type:MM_FILEPAGES val:33 [ 26.100637] BUG: Bad rss-counter state mm:000000003832563d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41807' (ECDSA) to the list of known hosts. 2023/06/19 13:33:06 fuzzer started 2023/06/19 13:33:06 dialing manager at localhost:44161 2023/06/19 13:33:06 checking machine... 2023/06/19 13:33:06 checking revisions... [ 26.803915] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:33:07 testing simple program... [ 26.859944] cgroup: Unknown subsys name 'net' [ 26.911320] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:06 Registers: info registers vcpu 0 RAX=ffffffff864b19bd RBX=0000000000000001 RCX=ffffffff864b19bc RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b19c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407e10 R15=ffff88806ce09a98 RIP=ffffffff81130b99 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 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=00007ffdff6f3f98 CR3=000000000e6e6000 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=2036303a33333a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a33333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e3c7998 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800e3c7988 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800e3c7c20 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e47 RFL=00000286 [--S--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 00007f579fda2900 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=00007f57a035a0b0 CR3=000000000de52000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000