syzkaller login: [ 28.960861] BUG: Bad rss-counter state mm:00000000d65a5cf3 type:MM_FILEPAGES val:33 [ 28.963512] BUG: Bad rss-counter state mm:00000000d65a5cf3 type:MM_ANONPAGES val:22 [ 29.130883] ================================================================== [ 29.132029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.133064] Read of size 8 at addr ffff888016ac9df0 by task sshd/221 [ 29.133996] [ 29.134211] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.135072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.136071] Call Trace: [ 29.136386] [ 29.136672] dump_stack_lvl+0x91/0xf0 [ 29.137168] print_report+0xcc/0x620 [ 29.137648] ? __virt_addr_valid+0x102/0x340 [ 29.138205] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.138824] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.139470] kasan_report+0xbe/0xf0 [ 29.139946] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.140562] vma_interval_tree_remove+0xc75/0xec0 [ 29.141164] vma_prepare+0xc54/0x11a0 [ 29.141641] __split_vma+0x5af/0x950 [ 29.142120] ? __pfx___split_vma+0x10/0x10 [ 29.142644] ? find_held_lock+0x2c/0x110 [ 29.143175] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.143743] ? lock_is_held_type+0x9f/0x120 [ 29.144280] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.144884] ? mtree_range_walk+0x632/0x900 [ 29.145438] ? mas_walk+0x5c7/0x7c0 [ 29.145913] do_vmi_munmap+0x1f1/0x2b0 [ 29.146413] mmap_region+0x1f9/0x2660 [ 29.146899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.147444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.148162] ? __pfx_lock_acquire+0x10/0x10 [ 29.148704] ? __pfx_mmap_region+0x10/0x10 [ 29.149237] ? security_mmap_addr+0x7d/0xa0 [ 29.149768] ? get_unmapped_area+0x1f5/0x3f0 [ 29.150326] do_mmap+0x854/0xf00 [ 29.150765] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.151270] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.151832] ksys_mmap_pgoff+0x3af/0x500 [ 29.152337] do_syscall_64+0x3f/0x90 [ 29.152820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.153464] RIP: 0033:0x7f13a7fa5d82 [ 29.153924] 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 [ 29.156122] RSP: 002b:00007ffe3fff2e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.157016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13a7fa5d82 [ 29.157857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13a73df000 [ 29.158696] RBP: 00007f13a73df000 R08: 0000000000000009 R09: 0000000000001000 [ 29.159569] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641a435dec0 [ 29.160411] R13: 00007ffe3fff2e40 R14: 00007ffe3fff2e70 R15: 00007ffe3fff31d0 [ 29.161261] [ 29.161552] [ 29.161765] Allocated by task 213: [ 29.162189] kasan_save_stack+0x22/0x50 [ 29.162688] kasan_set_track+0x25/0x30 [ 29.163191] __kasan_slab_alloc+0x59/0x70 [ 29.163707] kmem_cache_alloc+0x16b/0x370 [ 29.164220] vm_area_dup+0x20/0x160 [ 29.164668] __split_vma+0x170/0x950 [ 29.165127] split_vma+0xc6/0x110 [ 29.165564] mprotect_fixup+0x8d2/0xb30 [ 29.166060] do_mprotect_pkey+0x87e/0xd40 [ 29.166576] __x64_sys_mprotect+0x78/0xc0 [ 29.167121] do_syscall_64+0x3f/0x90 [ 29.167595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.168241] [ 29.168455] Freed by task 213: [ 29.168842] kasan_save_stack+0x22/0x50 [ 29.169340] kasan_set_track+0x25/0x30 [ 29.169829] kasan_save_free_info+0x2b/0x50 [ 29.170352] __kasan_slab_free+0x10a/0x190 [ 29.170884] kmem_cache_free+0x10d/0x4d0 [ 29.171404] rcu_core+0x8c8/0x2860 [ 29.171849] __do_softirq+0x1b7/0x7d4 [ 29.172324] [ 29.172537] Last potentially related work creation: [ 29.173118] kasan_save_stack+0x22/0x50 [ 29.173614] __kasan_record_aux_stack+0x8e/0xa0 [ 29.174186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.174919] remove_vma+0x139/0x170 [ 29.175382] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.175938] do_vmi_munmap+0x1f1/0x2b0 [ 29.176423] __vm_munmap+0x138/0x3a0 [ 29.176884] __x64_sys_munmap+0x59/0x80 [ 29.177386] do_syscall_64+0x3f/0x90 [ 29.177862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.178498] [ 29.178710] The buggy address belongs to the object at ffff888016ac9d98 [ 29.178710] which belongs to the cache vm_area_struct of size 168 [ 29.180183] The buggy address is located 88 bytes inside of [ 29.180183] freed 168-byte region [ffff888016ac9d98, ffff888016ac9e40) [ 29.181588] [ 29.181809] The buggy address belongs to the physical page: [ 29.182479] page:000000001505cf93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac9 [ 29.183587] memcg:ffff88800da65d01 [ 29.184009] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.184645] page_type: 0xffffffff() [ 29.185093] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.186001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da65d01 [ 29.186900] page dumped because: kasan: bad access detected [ 29.187564] [ 29.187776] Memory state around the buggy address: [ 29.188354] ffff888016ac9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.189195] ffff888016ac9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.190044] >ffff888016ac9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.190883] ^ [ 29.191699] ffff888016ac9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.192546] ffff888016ac9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.193399] ================================================================== [ 29.194345] Disabling lock debugging due to kernel taint [ 32.212841] BUG: Bad rss-counter state mm:00000000714ed582 type:MM_FILEPAGES val:33 [ 32.214543] BUG: Bad rss-counter state mm:00000000714ed582 type:MM_ANONPAGES val:22 [ 32.789963] BUG: Bad rss-counter state mm:00000000919cf059 type:MM_FILEPAGES val:33 [ 32.791311] BUG: Bad rss-counter state mm:00000000919cf059 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21499' (ECDSA) to the list of known hosts. 2023/06/21 08:34:59 fuzzer started 2023/06/21 08:35:00 dialing manager at localhost:36067 2023/06/21 08:35:00 checking machine... 2023/06/21 08:35:00 checking revisions... [ 33.682222] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:00 testing simple program... [ 33.739964] cgroup: Unknown subsys name 'net' [ 33.851401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:59 Registers: info registers vcpu 0 RAX=0000000000020c57 RBX=0000000000000001 RCX=ffffffff818083e7 RDX=0000000000020c57 RSI=0000000000008083 RDI=ffffffff86509c00 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020c57 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130837 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 00007f738f1b9900 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=00007fff66a97000 CR3=000000001ce4e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f414467a260 CR3=000000000d336000 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=2039353a34333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000