syzkaller login: [ 31.027804] BUG: Bad rss-counter state mm:00000000dd7ca8be type:MM_FILEPAGES val:33 [ 31.029732] BUG: Bad rss-counter state mm:00000000dd7ca8be type:MM_ANONPAGES val:22 [ 31.195781] ================================================================== [ 31.196709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197652] Read of size 8 at addr ffff88800df4f140 by task sshd/221 [ 31.198428] [ 31.198648] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.199602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.200573] Call Trace: [ 31.200892] [ 31.201177] dump_stack_lvl+0x91/0xf0 [ 31.201669] print_report+0xcc/0x620 [ 31.202180] ? __virt_addr_valid+0x102/0x340 [ 31.202733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203969] kasan_report+0xbe/0xf0 [ 31.204444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205064] vma_interval_tree_remove+0xc75/0xec0 [ 31.205667] vma_prepare+0xc54/0x11a0 [ 31.206163] __split_vma+0x5af/0x950 [ 31.206639] ? __pfx___split_vma+0x10/0x10 [ 31.207168] ? find_held_lock+0x2c/0x110 [ 31.207697] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208266] ? lock_is_held_type+0x9f/0x120 [ 31.208800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209404] ? mtree_range_walk+0x632/0x900 [ 31.209961] ? mas_walk+0x5c7/0x7c0 [ 31.210602] do_vmi_munmap+0x1f1/0x2b0 [ 31.211148] mmap_region+0x1f9/0x2660 [ 31.211669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.212212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.212956] ? __pfx_lock_acquire+0x10/0x10 [ 31.213517] ? __pfx_mmap_region+0x10/0x10 [ 31.214083] ? security_mmap_addr+0x7d/0xa0 [ 31.214658] ? get_unmapped_area+0x1f5/0x3f0 [ 31.215231] do_mmap+0x854/0xf00 [ 31.215689] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.216804] ksys_mmap_pgoff+0x3af/0x500 [ 31.217341] do_syscall_64+0x3f/0x90 [ 31.217841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218561] RIP: 0033:0x7f594657bd82 [ 31.219047] 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 [ 31.221276] RSP: 002b:00007ffd6c4178d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.222230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f594657bd82 [ 31.223108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59459b5000 [ 31.224001] RBP: 00007f59459b5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.224910] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580b5913f70 [ 31.225801] R13: 00007ffd6c4178f0 R14: 00007ffd6c417920 R15: 00007ffd6c417c80 [ 31.226702] [ 31.227020] [ 31.227245] Allocated by task 214: [ 31.227695] kasan_save_stack+0x22/0x50 [ 31.228223] kasan_set_track+0x25/0x30 [ 31.228746] __kasan_slab_alloc+0x59/0x70 [ 31.229294] kmem_cache_alloc+0x16b/0x370 [ 31.229831] vm_area_dup+0x20/0x160 [ 31.230342] __split_vma+0x170/0x950 [ 31.230846] split_vma+0xc6/0x110 [ 31.231311] mprotect_fixup+0x8d2/0xb30 [ 31.231843] do_mprotect_pkey+0x87e/0xd40 [ 31.232399] __x64_sys_mprotect+0x78/0xc0 [ 31.232944] do_syscall_64+0x3f/0x90 [ 31.233441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234125] [ 31.234353] Freed by task 214: [ 31.234764] kasan_save_stack+0x22/0x50 [ 31.235296] kasan_set_track+0x25/0x30 [ 31.235816] kasan_save_free_info+0x2b/0x50 [ 31.236380] __kasan_slab_free+0x10a/0x190 [ 31.236940] kmem_cache_free+0x10d/0x4d0 [ 31.237477] rcu_core+0x8c8/0x2860 [ 31.237947] __do_softirq+0x1b7/0x7d4 [ 31.238472] [ 31.238711] Last potentially related work creation: [ 31.239315] kasan_save_stack+0x22/0x50 [ 31.239846] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241146] remove_vma+0x139/0x170 [ 31.241630] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242247] do_vmi_munmap+0x1f1/0x2b0 [ 31.242766] __vm_munmap+0x138/0x3a0 [ 31.243254] __x64_sys_munmap+0x59/0x80 [ 31.243780] do_syscall_64+0x3f/0x90 [ 31.244290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244975] [ 31.245203] Second to last potentially related work creation: [ 31.245918] kasan_save_stack+0x22/0x50 [ 31.246473] __kasan_record_aux_stack+0x8e/0xa0 [ 31.247074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247750] remove_vma+0x139/0x170 [ 31.248222] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248795] do_vmi_munmap+0x1f1/0x2b0 [ 31.249310] mmap_region+0x1f9/0x2660 [ 31.249813] do_mmap+0x854/0xf00 [ 31.250284] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.250809] ksys_mmap_pgoff+0x3af/0x500 [ 31.251346] do_syscall_64+0x3f/0x90 [ 31.251846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252521] [ 31.252753] The buggy address belongs to the object at ffff88800df4f0e8 [ 31.252753] which belongs to the cache vm_area_struct of size 168 [ 31.254315] The buggy address is located 88 bytes inside of [ 31.254315] freed 168-byte region [ffff88800df4f0e8, ffff88800df4f190) [ 31.255785] [ 31.256018] The buggy address belongs to the physical page: [ 31.256705] page:00000000a669a339 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf4f [ 31.257871] memcg:ffff8880099e6501 [ 31.258330] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.259050] page_type: 0xffffffff() [ 31.259538] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b6000 dead000000000003 [ 31.260502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099e6501 [ 31.261453] page dumped because: kasan: bad access detected [ 31.262169] [ 31.262400] Memory state around the buggy address: [ 31.263008] ffff88800df4f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.263908] ffff88800df4f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.264809] >ffff88800df4f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265699] ^ [ 31.266385] ffff88800df4f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.267275] ffff88800df4f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.268165] ================================================================== [ 31.269244] Disabling lock debugging due to kernel taint [ 33.280575] BUG: Bad rss-counter state mm:000000007f2fb67a type:MM_FILEPAGES val:33 [ 33.281739] BUG: Bad rss-counter state mm:000000007f2fb67a type:MM_ANONPAGES val:22 [ 33.659572] BUG: Bad rss-counter state mm:00000000577eebde type:MM_FILEPAGES val:33 [ 33.660548] BUG: Bad rss-counter state mm:00000000577eebde type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46959' (ECDSA) to the list of known hosts. 2023/06/20 17:44:29 fuzzer started 2023/06/20 17:44:29 dialing manager at localhost:36067 2023/06/20 17:44:29 checking machine... 2023/06/20 17:44:29 checking revisions... [ 34.375750] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:44:29 testing simple program... [ 34.418775] cgroup: Unknown subsys name 'net' [ 34.474065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:44:29 Registers: info registers vcpu 0 RAX=0000000000020c51 RBX=0000000000000001 RCX=ffffffff818080da RDX=0000000000020c54 RSI=0000000000008080 RDI=00000000000624fc RBP=ffff888014797628 RSP=ffff888014797560 R8 =ffffffff861386ee R9 =ffff888014797610 R10=0000000000038001 R11=0000000000020c51 R12=ffff888014797630 R13=ffff888014797618 R14=ffff888014797611 R15=ffff8880147975d0 RIP=ffffffff81130859 RFL=00000287 [--S--PC] 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 00007f687a6d0900 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=00007f03a7dc3650 CR3=000000000d41e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f0476f43418d958800000000000ae988 XMM05=c892c51bf3b19f340000000000133e00 XMM06=e4cb8bb95a7664b60000000000132cb8 XMM07=fb795ef6d65770560000000000121b28 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc51c82bc8 CR3=0000000016498000 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=2039323a34343a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000