syzkaller login: [ 31.076599] BUG: Bad rss-counter state mm:0000000018deb716 type:MM_FILEPAGES val:33 [ 31.077680] BUG: Bad rss-counter state mm:0000000018deb716 type:MM_ANONPAGES val:22 [ 31.245679] ================================================================== [ 31.246580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.247532] Read of size 8 at addr ffff88800c9cd880 by task sshd/220 [ 31.248401] [ 31.248631] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.249496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.250516] Call Trace: [ 31.250845] [ 31.251135] dump_stack_lvl+0x91/0xf0 [ 31.251635] print_report+0xcc/0x620 [ 31.252114] ? __virt_addr_valid+0x102/0x340 [ 31.252703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253945] kasan_report+0xbe/0xf0 [ 31.254420] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255032] vma_interval_tree_remove+0xc75/0xec0 [ 31.255655] vma_prepare+0xc54/0x11a0 [ 31.256134] __split_vma+0x5af/0x950 [ 31.256608] ? __pfx___split_vma+0x10/0x10 [ 31.257137] ? find_held_lock+0x2c/0x110 [ 31.257653] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.258214] ? lock_is_held_type+0x9f/0x120 [ 31.258748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.259366] ? mtree_range_walk+0x632/0x900 [ 31.259913] ? mas_walk+0x5c7/0x7c0 [ 31.260385] do_vmi_munmap+0x1f1/0x2b0 [ 31.260895] mmap_region+0x1f9/0x2660 [ 31.261372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261873] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.262575] ? __pfx_lock_acquire+0x10/0x10 [ 31.263108] ? __pfx_mmap_region+0x10/0x10 [ 31.263632] ? security_mmap_addr+0x7d/0xa0 [ 31.264159] ? get_unmapped_area+0x1f5/0x3f0 [ 31.264716] do_mmap+0x854/0xf00 [ 31.265153] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.266200] ksys_mmap_pgoff+0x3af/0x500 [ 31.266699] do_syscall_64+0x3f/0x90 [ 31.267174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267819] RIP: 0033:0x7f1866b4ad82 [ 31.268272] 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 [ 31.270410] RSP: 002b:00007ffd8e8138e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.271310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1866b4ad82 [ 31.272155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1865f84000 [ 31.273010] RBP: 00007f1865f84000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273855] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589b04ddf70 [ 31.274703] R13: 00007ffd8e813900 R14: 00007ffd8e813930 R15: 00007ffd8e813c90 [ 31.275550] [ 31.275843] [ 31.276056] Allocated by task 213: [ 31.276486] kasan_save_stack+0x22/0x50 [ 31.277013] kasan_set_track+0x25/0x30 [ 31.277502] __kasan_slab_alloc+0x59/0x70 [ 31.278026] kmem_cache_alloc+0x16b/0x370 [ 31.278537] vm_area_dup+0x20/0x160 [ 31.278988] __split_vma+0x170/0x950 [ 31.279457] split_vma+0xc6/0x110 [ 31.279891] mprotect_fixup+0x8d2/0xb30 [ 31.280385] do_mprotect_pkey+0x87e/0xd40 [ 31.280909] __x64_sys_mprotect+0x78/0xc0 [ 31.281426] do_syscall_64+0x3f/0x90 [ 31.281903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282540] [ 31.282753] Freed by task 213: [ 31.283142] kasan_save_stack+0x22/0x50 [ 31.283640] kasan_set_track+0x25/0x30 [ 31.284127] kasan_save_free_info+0x2b/0x50 [ 31.284692] __kasan_slab_free+0x10a/0x190 [ 31.285217] kmem_cache_free+0x10d/0x4d0 [ 31.285719] rcu_core+0x8c8/0x2860 [ 31.286158] __do_softirq+0x1b7/0x7d4 [ 31.286634] [ 31.286847] Last potentially related work creation: [ 31.287429] kasan_save_stack+0x22/0x50 [ 31.287923] __kasan_record_aux_stack+0x8e/0xa0 [ 31.288484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.289149] remove_vma+0x139/0x170 [ 31.289595] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.290151] do_vmi_munmap+0x1f1/0x2b0 [ 31.290630] __vm_munmap+0x138/0x3a0 [ 31.291097] __x64_sys_munmap+0x59/0x80 [ 31.291589] do_syscall_64+0x3f/0x90 [ 31.292064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292707] [ 31.292920] Second to last potentially related work creation: [ 31.293600] kasan_save_stack+0x22/0x50 [ 31.294096] __kasan_record_aux_stack+0x8e/0xa0 [ 31.294666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.295306] remove_vma+0x139/0x170 [ 31.295762] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.296309] do_vmi_munmap+0x1f1/0x2b0 [ 31.296802] mmap_region+0x1f9/0x2660 [ 31.297279] do_mmap+0x854/0xf00 [ 31.297702] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.298183] ksys_mmap_pgoff+0x3af/0x500 [ 31.298679] do_syscall_64+0x3f/0x90 [ 31.299151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299796] [ 31.300009] The buggy address belongs to the object at ffff88800c9cd828 [ 31.300009] which belongs to the cache vm_area_struct of size 168 [ 31.301483] The buggy address is located 88 bytes inside of [ 31.301483] freed 168-byte region [ffff88800c9cd828, ffff88800c9cd8d0) [ 31.302877] [ 31.303089] The buggy address belongs to the physical page: [ 31.303752] page:0000000012da6d01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9cd [ 31.304840] memcg:ffff88800e402b01 [ 31.305269] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.305979] page_type: 0xffffffff() [ 31.306425] raw: 0100000000000200 ffff8880087a0c80 ffffea0000269080 dead000000000005 [ 31.307337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e402b01 [ 31.308241] page dumped because: kasan: bad access detected [ 31.308917] [ 31.309130] Memory state around the buggy address: [ 31.309711] ffff88800c9cd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.310595] ffff88800c9cd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.311464] >ffff88800c9cd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.312337] ^ [ 31.312753] ffff88800c9cd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313603] ffff88800c9cd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.314461] ================================================================== [ 31.315477] Disabling lock debugging due to kernel taint [ 33.546749] BUG: Bad rss-counter state mm:0000000012daa25f type:MM_FILEPAGES val:33 [ 33.547911] BUG: Bad rss-counter state mm:0000000012daa25f type:MM_ANONPAGES val:22 [ 33.919944] BUG: Bad rss-counter state mm:000000005a6215a0 type:MM_FILEPAGES val:33 [ 33.920891] BUG: Bad rss-counter state mm:000000005a6215a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53986' (ECDSA) to the list of known hosts. 2023/06/20 17:51:24 fuzzer started 2023/06/20 17:51:25 dialing manager at localhost:36067 2023/06/20 17:51:25 checking machine... 2023/06/20 17:51:25 checking revisions... [ 34.621146] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:25 testing simple program... [ 34.672004] cgroup: Unknown subsys name 'net' [ 34.719383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000f48 RCX=ffffffff8366282e RDX=ffff888015a11b40 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff88801cd9b640 RSP=ffff888008ecf3e8 R8 =0000000000000004 R9 =0000000000000f48 R10=0000000000001ec0 R11=563412feff005450 R12=0000000000000014 R13=ffff888019cf0f34 R14=0000000000001ec0 R15=0000000000000f8c RIP=ffffffff814c027c 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 00007f7d74ea8900 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=00007f7d7545f618 CR3=000000001803e000 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=ffffffffffffffff RBX=00000000000182ff RCX=0000000000000004 RDX=0000000000000200 RSI=00000000000000ff RDI=ffffed100305fec0 RBP=0000000000000000 RSP=ffff88806cf09d50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed100305fe00 R11=0000000000000000 R12=0000000000000000 R13=ffffffff852c61f8 R14=ffffffff852c61e8 R15=ffffea000060bfc0 RIP=ffffffff84513403 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 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=00007fce17973c00 CR3=000000000ff04000 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=2034323a31353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000