syzkaller login: [ 44.716721] BUG: Bad rss-counter state mm:00000000551d18ef type:MM_FILEPAGES val:33 [ 44.718045] BUG: Bad rss-counter state mm:00000000551d18ef type:MM_ANONPAGES val:22 [ 44.865897] ================================================================== [ 44.866963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.868203] Read of size 8 at addr ffff88800c9fa4e0 by task sshd/220 [ 44.869190] [ 44.869459] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.870525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.871736] Call Trace: [ 44.872121] [ 44.872463] dump_stack_lvl+0x91/0xf0 [ 44.873089] print_report+0xcc/0x620 [ 44.873688] ? __virt_addr_valid+0x102/0x340 [ 44.874396] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.875209] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.876052] kasan_report+0xbe/0xf0 [ 44.876700] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.877496] vma_interval_tree_remove+0xc75/0xec0 [ 44.878236] vma_prepare+0xc54/0x11a0 [ 44.878833] __split_vma+0x5af/0x950 [ 44.879453] ? __pfx___split_vma+0x10/0x10 [ 44.880119] ? find_held_lock+0x2c/0x110 [ 44.880789] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.881491] ? lock_is_held_type+0x9f/0x120 [ 44.882190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.882998] ? mtree_range_walk+0x632/0x900 [ 44.883712] ? mas_walk+0x5c7/0x7c0 [ 44.884307] do_vmi_munmap+0x1f1/0x2b0 [ 44.884956] mmap_region+0x1f9/0x2660 [ 44.885568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.886206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.887140] ? __pfx_lock_acquire+0x10/0x10 [ 44.887822] ? __pfx_mmap_region+0x10/0x10 [ 44.888522] ? security_mmap_addr+0x7d/0xa0 [ 44.889232] ? get_unmapped_area+0x1f5/0x3f0 [ 44.889947] do_mmap+0x854/0xf00 [ 44.890519] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.891146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.891884] ksys_mmap_pgoff+0x3af/0x500 [ 44.892523] do_syscall_64+0x3f/0x90 [ 44.893142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.893974] RIP: 0033:0x7ffa02586d82 [ 44.894545] 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 [ 44.897304] RSP: 002b:00007ffdac2cf428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.898446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa02586d82 [ 44.899515] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa019c0000 [ 44.900617] RBP: 00007ffa019c0000 R08: 0000000000000009 R09: 0000000000001000 [ 44.901697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5bed6ad90 [ 44.902760] R13: 00007ffdac2cf440 R14: 00007ffdac2cf470 R15: 00007ffdac2cf7d0 [ 44.903765] [ 44.904109] [ 44.904333] Allocated by task 213: [ 44.904836] kasan_save_stack+0x22/0x50 [ 44.905348] kasan_set_track+0x25/0x30 [ 44.905875] __kasan_slab_alloc+0x59/0x70 [ 44.906426] kmem_cache_alloc+0x16b/0x370 [ 44.906964] vm_area_dup+0x20/0x160 [ 44.907416] __split_vma+0x170/0x950 [ 44.907922] split_vma+0xc6/0x110 [ 44.908365] mprotect_fixup+0x8d2/0xb30 [ 44.908903] do_mprotect_pkey+0x87e/0xd40 [ 44.909440] __x64_sys_mprotect+0x78/0xc0 [ 44.910006] do_syscall_64+0x3f/0x90 [ 44.910590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.911369] [ 44.911648] Freed by task 209: [ 44.912170] kasan_save_stack+0x22/0x50 [ 44.912857] kasan_set_track+0x25/0x30 [ 44.913510] kasan_save_free_info+0x2b/0x50 [ 44.914204] __kasan_slab_free+0x10a/0x190 [ 44.914904] kmem_cache_free+0x10d/0x4d0 [ 44.915566] rcu_core+0x8c8/0x2860 [ 44.916138] __do_softirq+0x1b7/0x7d4 [ 44.916781] [ 44.917055] Last potentially related work creation: [ 44.917799] kasan_save_stack+0x22/0x50 [ 44.918461] __kasan_record_aux_stack+0x8e/0xa0 [ 44.919211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.920028] remove_vma+0x139/0x170 [ 44.920574] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.921304] do_vmi_munmap+0x1f1/0x2b0 [ 44.921918] __vm_munmap+0x138/0x3a0 [ 44.922509] __x64_sys_munmap+0x59/0x80 [ 44.923143] do_syscall_64+0x3f/0x90 [ 44.923728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.924390] [ 44.924605] Second to last potentially related work creation: [ 44.925302] kasan_save_stack+0x22/0x50 [ 44.925808] __kasan_record_aux_stack+0x8e/0xa0 [ 44.926386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.926993] remove_vma+0x139/0x170 [ 44.927421] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.927975] do_vmi_munmap+0x1f1/0x2b0 [ 44.928466] mmap_region+0x1f9/0x2660 [ 44.928968] do_mmap+0x854/0xf00 [ 44.929403] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.929896] ksys_mmap_pgoff+0x3af/0x500 [ 44.930410] do_syscall_64+0x3f/0x90 [ 44.930881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.931558] [ 44.931778] The buggy address belongs to the object at ffff88800c9fa488 [ 44.931778] which belongs to the cache vm_area_struct of size 168 [ 44.933273] The buggy address is located 88 bytes inside of [ 44.933273] freed 168-byte region [ffff88800c9fa488, ffff88800c9fa530) [ 44.934690] [ 44.934916] The buggy address belongs to the physical page: [ 44.935573] page:00000000450d27e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9fa [ 44.936734] memcg:ffff88800f00eb01 [ 44.937160] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.937826] page_type: 0xffffffff() [ 44.938301] raw: 0100000000000200 ffff88800879fc80 ffffea0000327c00 0000000000000006 [ 44.939271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f00eb01 [ 44.940235] page dumped because: kasan: bad access detected [ 44.940961] [ 44.941186] Memory state around the buggy address: [ 44.941812] ffff88800c9fa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.942718] ffff88800c9fa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.943618] >ffff88800c9fa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.944506] ^ [ 44.945371] ffff88800c9fa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 44.946270] ffff88800c9fa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.947162] ================================================================== [ 44.948574] Disabling lock debugging due to kernel taint [ 46.701965] BUG: Bad rss-counter state mm:00000000875a838d type:MM_FILEPAGES val:33 [ 46.702874] BUG: Bad rss-counter state mm:00000000875a838d type:MM_ANONPAGES val:22 [ 47.065109] BUG: Bad rss-counter state mm:00000000f8362689 type:MM_FILEPAGES val:33 [ 47.065809] BUG: Bad rss-counter state mm:00000000f8362689 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50460' (ECDSA) to the list of known hosts. 2023/06/19 21:36:13 fuzzer started 2023/06/19 21:36:14 dialing manager at localhost:44161 2023/06/19 21:36:14 checking machine... 2023/06/19 21:36:14 checking revisions... [ 47.684137] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:36:14 testing simple program... [ 47.744116] cgroup: Unknown subsys name 'net' [ 47.786470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fffaffb4d28 CR3=0000000005482000 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=00007fbbe51cc5100000555f8a7f6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffff88801973f558 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff88801973f4b8 RBP=ffff88801973f550 RSP=ffff88801973f4a8 R8 =0000000000000001 R9 =ffff88801973f4f8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801973f580 R13=0000000000000000 R14=ffff888019740000 R15=0000000000000000 RIP=ffffffff811305e0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc09bdfa700 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=00007f521efaf650 CR3=000000000e5a2000 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=2033313a36333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000