syzkaller login: [ 43.896552] BUG: Bad rss-counter state mm:00000000362fd5d5 type:MM_FILEPAGES val:33 [ 43.897739] BUG: Bad rss-counter state mm:00000000362fd5d5 type:MM_ANONPAGES val:22 [ 43.935071] ================================================================== [ 43.936081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.937120] Read of size 8 at addr ffff88800fc9b968 by task sshd/220 [ 43.937911] [ 43.938133] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.939030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.940061] Call Trace: [ 43.940385] [ 43.940670] dump_stack_lvl+0x91/0xf0 [ 43.941169] print_report+0xcc/0x620 [ 43.941662] ? __virt_addr_valid+0x102/0x340 [ 43.942233] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.942857] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.943512] kasan_report+0xbe/0xf0 [ 43.943998] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.944640] vma_interval_tree_remove+0xc75/0xec0 [ 43.945247] vma_prepare+0xc54/0x11a0 [ 43.945735] __split_vma+0x5af/0x950 [ 43.946214] ? __pfx___split_vma+0x10/0x10 [ 43.946744] ? find_held_lock+0x2c/0x110 [ 43.947275] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.947843] ? lock_is_held_type+0x9f/0x120 [ 43.948383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.948990] ? mtree_range_walk+0x632/0x900 [ 43.949543] ? mas_walk+0x5c7/0x7c0 [ 43.950017] do_vmi_munmap+0x1f1/0x2b0 [ 43.950515] mmap_region+0x1f9/0x2660 [ 43.951005] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.951525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.952236] ? __pfx_lock_acquire+0x10/0x10 [ 43.952780] ? __pfx_mmap_region+0x10/0x10 [ 43.953305] ? security_mmap_addr+0x7d/0xa0 [ 43.953843] ? get_unmapped_area+0x1f5/0x3f0 [ 43.954394] do_mmap+0x854/0xf00 [ 43.954839] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.955346] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.955911] ksys_mmap_pgoff+0x3af/0x500 [ 43.956417] do_syscall_64+0x3f/0x90 [ 43.956898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.957546] RIP: 0033:0x7ff908e62d82 [ 43.958003] 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 [ 43.960143] RSP: 002b:00007fff63cffa98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.961065] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff908e62d82 [ 43.961926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff90829c000 [ 43.962779] RBP: 00007ff90829c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.963633] R10: 0000000000000812 R11: 0000000000000206 R12: 000055787a947ec0 [ 43.964484] R13: 00007fff63cffab0 R14: 00007fff63cffae0 R15: 00007fff63cffe40 [ 43.965357] [ 43.965654] [ 43.965868] Allocated by task 213: [ 43.966298] kasan_save_stack+0x22/0x50 [ 43.966804] kasan_set_track+0x25/0x30 [ 43.967321] __kasan_slab_alloc+0x59/0x70 [ 43.967852] kmem_cache_alloc+0x16b/0x370 [ 43.968382] vm_area_dup+0x20/0x160 [ 43.968837] __split_vma+0x170/0x950 [ 43.969304] split_vma+0xc6/0x110 [ 43.969744] mprotect_fixup+0x8d2/0xb30 [ 43.970252] do_mprotect_pkey+0x87e/0xd40 [ 43.970775] __x64_sys_mprotect+0x78/0xc0 [ 43.971317] do_syscall_64+0x3f/0x90 [ 43.971791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.972446] [ 43.972662] Freed by task 213: [ 43.973063] kasan_save_stack+0x22/0x50 [ 43.973589] kasan_set_track+0x25/0x30 [ 43.974093] kasan_save_free_info+0x2b/0x50 [ 43.974642] __kasan_slab_free+0x10a/0x190 [ 43.975206] kmem_cache_free+0x10d/0x4d0 [ 43.975718] rcu_core+0x8c8/0x2860 [ 43.976165] __do_softirq+0x1b7/0x7d4 [ 43.976652] [ 43.976874] Last potentially related work creation: [ 43.977473] kasan_save_stack+0x22/0x50 [ 43.977987] __kasan_record_aux_stack+0x8e/0xa0 [ 43.978563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.979232] remove_vma+0x139/0x170 [ 43.979689] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.980249] do_vmi_munmap+0x1f1/0x2b0 [ 43.980735] __vm_munmap+0x138/0x3a0 [ 43.981205] __x64_sys_munmap+0x59/0x80 [ 43.981705] do_syscall_64+0x3f/0x90 [ 43.982164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.982807] [ 43.983038] The buggy address belongs to the object at ffff88800fc9b910 [ 43.983038] which belongs to the cache vm_area_struct of size 168 [ 43.984529] The buggy address is located 88 bytes inside of [ 43.984529] freed 168-byte region [ffff88800fc9b910, ffff88800fc9b9b8) [ 43.985954] [ 43.986178] The buggy address belongs to the physical page: [ 43.986839] page:000000003407a7cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc9b [ 43.987931] memcg:ffff8880147d6f01 [ 43.988362] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.989014] page_type: 0xffffffff() [ 43.989465] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.990402] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147d6f01 [ 43.991352] page dumped because: kasan: bad access detected [ 43.992015] [ 43.992234] Memory state around the buggy address: [ 43.992810] ffff88800fc9b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 43.993684] ffff88800fc9b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 43.994579] >ffff88800fc9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.995472] ^ [ 43.996287] ffff88800fc9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 43.997201] ffff88800fc9ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.998065] ================================================================== [ 43.999127] Disabling lock debugging due to kernel taint [ 45.914449] BUG: Bad rss-counter state mm:00000000c6d2abbb type:MM_FILEPAGES val:33 [ 45.915982] BUG: Bad rss-counter state mm:00000000c6d2abbb type:MM_ANONPAGES val:22 [ 46.329671] BUG: Bad rss-counter state mm:00000000a2febbb8 type:MM_FILEPAGES val:33 [ 46.330759] BUG: Bad rss-counter state mm:00000000a2febbb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63537' (ECDSA) to the list of known hosts. 2023/06/19 14:48:55 fuzzer started 2023/06/19 14:48:55 dialing manager at localhost:44161 2023/06/19 14:48:55 checking machine... 2023/06/19 14:48:55 checking revisions... [ 47.017883] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:48:55 testing simple program... [ 47.053596] cgroup: Unknown subsys name 'net' [ 47.110735] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:48:50 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=00007fff4e44ce18 CR3=000000000d5bc000 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=2035353a38343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff844b8b35 RDX=ffff888019c03680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000003 RSP=ffff88801b837170 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000005 R11=ffff8880101a3488 R12=0000000000000005 R13=00007f862d6ccfff R14=dffffc0000000000 R15=ffff88801b8375c8 RIP=ffffffff814c07eb RFL=00000293 [--S-A-C] 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 00007f862d698900 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=00007f862d677020 CR3=000000000c7be000 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=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