syzkaller login: [ 31.273940] BUG: Bad rss-counter state mm:000000009754d71a type:MM_FILEPAGES val:33 [ 31.275141] BUG: Bad rss-counter state mm:000000009754d71a type:MM_ANONPAGES val:22 [ 31.310226] ================================================================== [ 31.311233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.312208] Read of size 8 at addr ffff8880147d1df0 by task sshd/219 [ 31.312973] [ 31.313202] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.314072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.315068] Call Trace: [ 31.315393] <TASK> [ 31.315677] dump_stack_lvl+0x91/0xf0 [ 31.316176] print_report+0xcc/0x620 [ 31.316653] ? __virt_addr_valid+0x102/0x340 [ 31.317208] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.317827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.318436] kasan_report+0xbe/0xf0 [ 31.318905] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.319530] vma_interval_tree_remove+0xc75/0xec0 [ 31.320129] vma_prepare+0xc54/0x11a0 [ 31.320603] __split_vma+0x5af/0x950 [ 31.321081] ? __pfx___split_vma+0x10/0x10 [ 31.321633] ? find_held_lock+0x2c/0x110 [ 31.322150] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.322721] ? lock_is_held_type+0x9f/0x120 [ 31.323264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.323865] ? mtree_range_walk+0x632/0x900 [ 31.324425] ? mas_walk+0x5c7/0x7c0 [ 31.324900] do_vmi_munmap+0x1f1/0x2b0 [ 31.325408] mmap_region+0x1f9/0x2660 [ 31.325891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.326403] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.327115] ? __pfx_lock_acquire+0x10/0x10 [ 31.327651] ? __pfx_mmap_region+0x10/0x10 [ 31.328177] ? security_mmap_addr+0x7d/0xa0 [ 31.328708] ? get_unmapped_area+0x1f5/0x3f0 [ 31.329270] do_mmap+0x854/0xf00 [ 31.329710] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.330213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.330764] ksys_mmap_pgoff+0x3af/0x500 [ 31.331269] do_syscall_64+0x3f/0x90 [ 31.331753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332398] RIP: 0033:0x7f696637dd82 [ 31.332851] 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 [ 31.335006] RSP: 002b:00007fff57264148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.335915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f696637dd82 [ 31.336778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69657b7000 [ 31.337647] RBP: 00007f69657b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.338508] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561aa994bb20 [ 31.339506] R13: 00007fff57264160 R14: 00007fff57264190 R15: 00007fff572644f0 [ 31.340363] </TASK> [ 31.340658] [ 31.340871] Allocated by task 212: [ 31.341326] kasan_save_stack+0x22/0x50 [ 31.341839] kasan_set_track+0x25/0x30 [ 31.342329] __kasan_slab_alloc+0x59/0x70 [ 31.342850] kmem_cache_alloc+0x16b/0x370 [ 31.343366] vm_area_dup+0x20/0x160 [ 31.343827] __split_vma+0x170/0x950 [ 31.344292] split_vma+0xc6/0x110 [ 31.344731] mprotect_fixup+0x8d2/0xb30 [ 31.345244] do_mprotect_pkey+0x87e/0xd40 [ 31.345763] __x64_sys_mprotect+0x78/0xc0 [ 31.346284] do_syscall_64+0x3f/0x90 [ 31.346762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347398] [ 31.347613] Freed by task 212: [ 31.348014] kasan_save_stack+0x22/0x50 [ 31.348522] kasan_set_track+0x25/0x30 [ 31.349014] kasan_save_free_info+0x2b/0x50 [ 31.349557] __kasan_slab_free+0x10a/0x190 [ 31.350097] kmem_cache_free+0x10d/0x4d0 [ 31.350610] rcu_core+0x8c8/0x2860 [ 31.351054] __do_softirq+0x1b7/0x7d4 [ 31.351533] [ 31.351743] Last potentially related work creation: [ 31.352336] kasan_save_stack+0x22/0x50 [ 31.352833] __kasan_record_aux_stack+0x8e/0xa0 [ 31.353423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.354055] remove_vma+0x139/0x170 [ 31.354510] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.355075] do_vmi_munmap+0x1f1/0x2b0 [ 31.355573] __vm_munmap+0x138/0x3a0 [ 31.356033] __x64_sys_munmap+0x59/0x80 [ 31.356531] do_syscall_64+0x3f/0x90 [ 31.357007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357660] [ 31.357875] The buggy address belongs to the object at ffff8880147d1d98 [ 31.357875] which belongs to the cache vm_area_struct of size 168 [ 31.359364] The buggy address is located 88 bytes inside of [ 31.359364] freed 168-byte region [ffff8880147d1d98, ffff8880147d1e40) [ 31.360797] [ 31.361013] The buggy address belongs to the physical page: [ 31.361722] page:000000000cde23bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147d1 [ 31.362837] memcg:ffff88800cbebd01 [ 31.363267] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.363915] page_type: 0xffffffff() [ 31.364370] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.365301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbebd01 [ 31.366214] page dumped because: kasan: bad access detected [ 31.366884] [ 31.367101] Memory state around the buggy address: [ 31.367696] ffff8880147d1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.368566] ffff8880147d1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.369438] >ffff8880147d1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.370285] ^ [ 31.371106] ffff8880147d1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.371961] ffff8880147d1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372821] ================================================================== [ 31.373777] Disabling lock debugging due to kernel taint [ 33.443385] BUG: Bad rss-counter state mm:00000000969f8bc5 type:MM_FILEPAGES val:33 [ 33.444337] BUG: Bad rss-counter state mm:00000000969f8bc5 type:MM_ANONPAGES val:22 [ 33.832767] BUG: Bad rss-counter state mm:00000000f2b3d4a4 type:MM_FILEPAGES val:33 [ 33.833548] BUG: Bad rss-counter state mm:00000000f2b3d4a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9265' (ECDSA) to the list of known hosts. 2023/06/20 23:16:23 fuzzer started 2023/06/20 23:16:24 dialing manager at localhost:36067 2023/06/20 23:16:24 checking machine... 2023/06/20 23:16:24 checking revisions... [ 34.532413] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:16:24 testing simple program... [ 34.584339] cgroup: Unknown subsys name 'net' [ 34.647940] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:16:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801014bc0c RCX=ffffffff844a4fda RDX=ffff88801656b680 RSI=0000000000000002 RDI=0000000000000000 RBP=0000000000000002 RSP=ffff88800c9a7cc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=ffff888019e54100 R14=00007fa533abd000 R15=00007fa533b18fff RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa533559900 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=00007fa533b0dae8 CR3=000000001ccb6000 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=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=00007f4ad2134450 CR3=0000000019e32000 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=2033323a36313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000