syzkaller login: [ 30.119189] BUG: Bad rss-counter state mm:00000000a205ef4b type:MM_FILEPAGES val:33 [ 30.120114] BUG: Bad rss-counter state mm:00000000a205ef4b type:MM_ANONPAGES val:22 [ 30.284915] ================================================================== [ 30.286240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.287121] Read of size 8 at addr ffff88800f193df0 by task sshd/221 [ 30.288062] [ 30.288257] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.289045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.289978] Call Trace: [ 30.290282] [ 30.290537] dump_stack_lvl+0x91/0xf0 [ 30.290991] print_report+0xcc/0x620 [ 30.291426] ? __virt_addr_valid+0x102/0x340 [ 30.291933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.292506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293066] kasan_report+0xbe/0xf0 [ 30.293510] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.294082] vma_interval_tree_remove+0xc75/0xec0 [ 30.294623] vma_prepare+0xc54/0x11a0 [ 30.295063] __split_vma+0x5af/0x950 [ 30.295492] ? __pfx___split_vma+0x10/0x10 [ 30.295974] ? find_held_lock+0x2c/0x110 [ 30.296442] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.296957] ? lock_is_held_type+0x9f/0x120 [ 30.297451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.298032] ? mtree_range_walk+0x632/0x900 [ 30.298542] ? mas_walk+0x5c7/0x7c0 [ 30.298969] do_vmi_munmap+0x1f1/0x2b0 [ 30.299414] mmap_region+0x1f9/0x2660 [ 30.299849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.300317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.300974] ? __pfx_lock_acquire+0x10/0x10 [ 30.301454] ? __pfx_mmap_region+0x10/0x10 [ 30.301938] ? security_mmap_addr+0x7d/0xa0 [ 30.302442] ? get_unmapped_area+0x1f5/0x3f0 [ 30.302939] do_mmap+0x854/0xf00 [ 30.303331] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.303777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.304281] ksys_mmap_pgoff+0x3af/0x500 [ 30.304742] do_syscall_64+0x3f/0x90 [ 30.305176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305765] RIP: 0033:0x7f0579453d82 [ 30.306188] 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 [ 30.308153] RSP: 002b:00007ffd2a232ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.308994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0579453d82 [ 30.309791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f057888d000 [ 30.310578] RBP: 00007f057888d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.311373] R10: 0000000000000812 R11: 0000000000000206 R12: 000055603a7e5b20 [ 30.312148] R13: 00007ffd2a232cc0 R14: 00007ffd2a232cf0 R15: 00007ffd2a233050 [ 30.312945] [ 30.313205] [ 30.313394] Allocated by task 214: [ 30.313785] kasan_save_stack+0x22/0x50 [ 30.314245] kasan_set_track+0x25/0x30 [ 30.314691] __kasan_slab_alloc+0x59/0x70 [ 30.315167] kmem_cache_alloc+0x16b/0x370 [ 30.315638] vm_area_dup+0x20/0x160 [ 30.316051] __split_vma+0x170/0x950 [ 30.316476] split_vma+0xc6/0x110 [ 30.316867] mprotect_fixup+0x8d2/0xb30 [ 30.317321] do_mprotect_pkey+0x87e/0xd40 [ 30.317793] __x64_sys_mprotect+0x78/0xc0 [ 30.318285] do_syscall_64+0x3f/0x90 [ 30.318714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.319298] [ 30.319489] Freed by task 214: [ 30.319842] kasan_save_stack+0x22/0x50 [ 30.320295] kasan_set_track+0x25/0x30 [ 30.320747] kasan_save_free_info+0x2b/0x50 [ 30.321231] __kasan_slab_free+0x10a/0x190 [ 30.321717] kmem_cache_free+0x10d/0x4d0 [ 30.322175] rcu_core+0x8c8/0x2860 [ 30.322590] __do_softirq+0x1b7/0x7d4 [ 30.323027] [ 30.323220] Last potentially related work creation: [ 30.323765] kasan_save_stack+0x22/0x50 [ 30.324219] __kasan_record_aux_stack+0x8e/0xa0 [ 30.324754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.325332] remove_vma+0x139/0x170 [ 30.325743] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.326253] do_vmi_munmap+0x1f1/0x2b0 [ 30.326704] __vm_munmap+0x138/0x3a0 [ 30.327127] __x64_sys_munmap+0x59/0x80 [ 30.327576] do_syscall_64+0x3f/0x90 [ 30.327957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.328435] [ 30.328595] Second to last potentially related work creation: [ 30.329088] kasan_save_stack+0x22/0x50 [ 30.329451] __kasan_record_aux_stack+0x8e/0xa0 [ 30.329870] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.330358] remove_vma+0x139/0x170 [ 30.330690] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.331100] do_vmi_munmap+0x1f1/0x2b0 [ 30.331462] mmap_region+0x1f9/0x2660 [ 30.331814] do_mmap+0x854/0xf00 [ 30.332130] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.332487] ksys_mmap_pgoff+0x3af/0x500 [ 30.332852] do_syscall_64+0x3f/0x90 [ 30.333198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.333672] [ 30.333830] The buggy address belongs to the object at ffff88800f193d98 [ 30.333830] which belongs to the cache vm_area_struct of size 168 [ 30.334896] The buggy address is located 88 bytes inside of [ 30.334896] freed 168-byte region [ffff88800f193d98, ffff88800f193e40) [ 30.335904] [ 30.336066] The buggy address belongs to the physical page: [ 30.336542] page:0000000061214ff6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf193 [ 30.337329] memcg:ffff888019d21201 [ 30.337676] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.338268] page_type: 0xffffffff() [ 30.338634] raw: 0100000000000200 ffff8880087a0c80 ffffea0000592d40 dead00000000000b [ 30.339371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d21201 [ 30.340121] page dumped because: kasan: bad access detected [ 30.340660] [ 30.340832] Memory state around the buggy address: [ 30.341311] ffff88800f193c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.342007] ffff88800f193d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.342698] >ffff88800f193d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.343388] ^ [ 30.344045] ffff88800f193e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.344733] ffff88800f193e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.345423] ================================================================== [ 30.346369] Disabling lock debugging due to kernel taint [ 32.427740] BUG: Bad rss-counter state mm:000000009c0f5e01 type:MM_FILEPAGES val:33 [ 32.429087] BUG: Bad rss-counter state mm:000000009c0f5e01 type:MM_ANONPAGES val:22 [ 32.876206] BUG: Bad rss-counter state mm:00000000a2a9b3df type:MM_FILEPAGES val:33 [ 32.877226] BUG: Bad rss-counter state mm:00000000a2a9b3df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27521' (ECDSA) to the list of known hosts. 2023/06/20 23:10:33 fuzzer started 2023/06/20 23:10:33 dialing manager at localhost:36067 2023/06/20 23:10:33 checking machine... 2023/06/20 23:10:33 checking revisions... [ 33.611523] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:33 testing simple program... [ 33.674521] cgroup: Unknown subsys name 'net' [ 33.731522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018b87b20 RCX=ffffffff8189fb46 RDX=ffff88800f2951c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888018b87a40 RSP=ffff888018b87940 R8 =0000000000000004 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000001 R12=0000000000000002 R13=0000000000000002 R14=0000000000000000 R15=ffff888015edcb78 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 00007f9bc8723900 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=00007f9bc8cd8650 CR3=000000000eae0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007ffce6599618 CR3=000000000d8e0000 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=2032333a30313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000