syzkaller login: [ 25.255298] BUG: Bad rss-counter state mm:00000000a9849783 type:MM_FILEPAGES val:33 [ 25.256593] BUG: Bad rss-counter state mm:00000000a9849783 type:MM_ANONPAGES val:22 [ 25.290078] ================================================================== [ 25.291163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.292266] Read of size 8 at addr ffff88800f52ba50 by task sshd/219 [ 25.293147] [ 25.293445] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.294412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.295572] Call Trace: [ 25.295890] [ 25.296179] dump_stack_lvl+0x91/0xf0 [ 25.296697] print_report+0xcc/0x620 [ 25.297181] ? __virt_addr_valid+0x102/0x340 [ 25.297732] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.298349] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.298963] kasan_report+0xbe/0xf0 [ 25.299437] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.300055] vma_interval_tree_remove+0xc75/0xec0 [ 25.300669] vma_prepare+0xc54/0x11a0 [ 25.301152] __split_vma+0x5af/0x950 [ 25.301626] ? __pfx___split_vma+0x10/0x10 [ 25.302152] ? find_held_lock+0x2c/0x110 [ 25.302676] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.303239] ? lock_is_held_type+0x9f/0x120 [ 25.303772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.304376] ? mtree_range_walk+0x632/0x900 [ 25.304931] ? mas_walk+0x5c7/0x7c0 [ 25.305410] do_vmi_munmap+0x1f1/0x2b0 [ 25.305898] mmap_region+0x1f9/0x2660 [ 25.306383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.306893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.307605] ? __pfx_lock_acquire+0x10/0x10 [ 25.308145] ? __pfx_mmap_region+0x10/0x10 [ 25.308692] ? security_mmap_addr+0x7d/0xa0 [ 25.309227] ? get_unmapped_area+0x1f5/0x3f0 [ 25.309780] do_mmap+0x854/0xf00 [ 25.310214] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.310706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.311269] ksys_mmap_pgoff+0x3af/0x500 [ 25.311772] do_syscall_64+0x3f/0x90 [ 25.312256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.312920] RIP: 0033:0x7f06fb441d82 [ 25.313372] 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 [ 25.315507] RSP: 002b:00007ffe77a3abd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.316408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06fb441d82 [ 25.317268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06fa87b000 [ 25.318114] RBP: 00007f06fa87b000 R08: 0000000000000009 R09: 0000000000001000 [ 25.319138] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595e6772d90 [ 25.319978] R13: 00007ffe77a3abf0 R14: 00007ffe77a3ac20 R15: 00007ffe77a3af80 [ 25.320845] [ 25.321153] [ 25.321366] Allocated by task 212: [ 25.321794] kasan_save_stack+0x22/0x50 [ 25.322294] kasan_set_track+0x25/0x30 [ 25.322782] __kasan_slab_alloc+0x59/0x70 [ 25.323308] kmem_cache_alloc+0x16b/0x370 [ 25.323825] vm_area_dup+0x20/0x160 [ 25.324290] __split_vma+0x170/0x950 [ 25.324771] split_vma+0xc6/0x110 [ 25.325212] mprotect_fixup+0x8d2/0xb30 [ 25.325709] do_mprotect_pkey+0x87e/0xd40 [ 25.326229] __x64_sys_mprotect+0x78/0xc0 [ 25.326753] do_syscall_64+0x3f/0x90 [ 25.327230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.327870] [ 25.328090] Freed by task 212: [ 25.328482] kasan_save_stack+0x22/0x50 [ 25.328995] kasan_set_track+0x25/0x30 [ 25.329488] kasan_save_free_info+0x2b/0x50 [ 25.330016] __kasan_slab_free+0x10a/0x190 [ 25.330551] kmem_cache_free+0x10d/0x4d0 [ 25.331056] rcu_core+0x8c8/0x2860 [ 25.331502] __do_softirq+0x1b7/0x7d4 [ 25.331971] [ 25.332188] Last potentially related work creation: [ 25.332780] kasan_save_stack+0x22/0x50 [ 25.333284] __kasan_record_aux_stack+0x8e/0xa0 [ 25.333854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.334497] remove_vma+0x139/0x170 [ 25.334945] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.335498] do_vmi_munmap+0x1f1/0x2b0 [ 25.335983] __vm_munmap+0x138/0x3a0 [ 25.336445] __x64_sys_munmap+0x59/0x80 [ 25.336961] do_syscall_64+0x3f/0x90 [ 25.337437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.338082] [ 25.338301] Second to last potentially related work creation: [ 25.338988] kasan_save_stack+0x22/0x50 [ 25.339490] __kasan_record_aux_stack+0x8e/0xa0 [ 25.340061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.340707] remove_vma+0x139/0x170 [ 25.341162] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.341715] do_vmi_munmap+0x1f1/0x2b0 [ 25.342198] mmap_region+0x1f9/0x2660 [ 25.342675] do_mmap+0x854/0xf00 [ 25.343107] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.343593] ksys_mmap_pgoff+0x3af/0x500 [ 25.344088] do_syscall_64+0x3f/0x90 [ 25.344563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.345219] [ 25.345435] The buggy address belongs to the object at ffff88800f52b9f8 [ 25.345435] which belongs to the cache vm_area_struct of size 168 [ 25.346891] The buggy address is located 88 bytes inside of [ 25.346891] freed 168-byte region [ffff88800f52b9f8, ffff88800f52baa0) [ 25.348281] [ 25.348494] The buggy address belongs to the physical page: [ 25.349158] page:00000000c18738e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf52b [ 25.350234] memcg:ffff88800ec3e001 [ 25.350659] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.351301] page_type: 0xffffffff() [ 25.351751] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 25.352684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec3e001 [ 25.353589] page dumped because: kasan: bad access detected [ 25.354248] [ 25.354466] Memory state around the buggy address: [ 25.355040] ffff88800f52b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.355894] ffff88800f52b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 25.356756] >ffff88800f52ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.357603] ^ [ 25.358300] ffff88800f52ba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 25.359154] ffff88800f52bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.360003] ================================================================== [ 25.361238] Disabling lock debugging due to kernel taint [ 26.938803] BUG: Bad rss-counter state mm:00000000c66c831e type:MM_FILEPAGES val:33 [ 26.939627] BUG: Bad rss-counter state mm:00000000c66c831e type:MM_ANONPAGES val:22 [ 27.433821] BUG: Bad rss-counter state mm:0000000025883fec type:MM_FILEPAGES val:33 [ 27.435182] BUG: Bad rss-counter state mm:0000000025883fec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57253' (ECDSA) to the list of known hosts. 2023/06/20 10:28:49 fuzzer started 2023/06/20 10:28:49 dialing manager at localhost:44161 2023/06/20 10:28:49 checking machine... 2023/06/20 10:28:49 checking revisions... [ 28.051120] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:28:49 testing simple program... [ 28.095538] cgroup: Unknown subsys name 'net' [ 28.150740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8216962d RDX=ffff8880166c1b40 RSI=0000000000000000 RDI=0000000000000007 RBP=00007ffd90f200b0 RSP=ffff88800ed67b20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000000 R15=ffff88800ed67e70 RIP=ffffffff814c01fc 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 00007f542068c900 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=00007ffd90f1bff8 CR3=000000000d63a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb42b86c9e0 CR3=000000000fe08000 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=2039343a38323a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a38323a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000