syzkaller login: [ 41.460139] BUG: Bad rss-counter state mm:000000001f59c8ef type:MM_FILEPAGES val:33 [ 41.462154] BUG: Bad rss-counter state mm:000000001f59c8ef type:MM_ANONPAGES val:22 [ 41.621887] ================================================================== [ 41.622800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.623756] Read of size 8 at addr ffff888019e32df0 by task sshd/219 [ 41.624542] [ 41.624760] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.625723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.626711] Call Trace: [ 41.627156] [ 41.627499] dump_stack_lvl+0x91/0xf0 [ 41.628094] print_report+0xcc/0x620 [ 41.628668] ? __virt_addr_valid+0x102/0x340 [ 41.629318] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.630042] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.630781] kasan_report+0xbe/0xf0 [ 41.631345] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.632090] vma_interval_tree_remove+0xc75/0xec0 [ 41.632802] vma_prepare+0xc54/0x11a0 [ 41.633367] __split_vma+0x5af/0x950 [ 41.633925] ? __pfx___split_vma+0x10/0x10 [ 41.634548] ? find_held_lock+0x2c/0x110 [ 41.635163] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.635862] ? lock_is_held_type+0x9f/0x120 [ 41.636433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.637037] ? mtree_range_walk+0x632/0x900 [ 41.637586] ? mas_walk+0x5c7/0x7c0 [ 41.638061] do_vmi_munmap+0x1f1/0x2b0 [ 41.638551] mmap_region+0x1f9/0x2660 [ 41.639031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.639541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.640261] ? __pfx_lock_acquire+0x10/0x10 [ 41.640787] ? __pfx_mmap_region+0x10/0x10 [ 41.641311] ? security_mmap_addr+0x7d/0xa0 [ 41.641838] ? get_unmapped_area+0x1f5/0x3f0 [ 41.642382] do_mmap+0x854/0xf00 [ 41.642818] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.643318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.643879] ksys_mmap_pgoff+0x3af/0x500 [ 41.644386] do_syscall_64+0x3f/0x90 [ 41.644861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.645502] RIP: 0033:0x7fbf03118d82 [ 41.645953] 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 [ 41.648088] RSP: 002b:00007fffc3ac6678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.648984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf03118d82 [ 41.649828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf02552000 [ 41.650663] RBP: 00007fbf02552000 R08: 0000000000000009 R09: 0000000000001000 [ 41.651507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b99f9cf980 [ 41.652367] R13: 00007fffc3ac6690 R14: 00007fffc3ac66c0 R15: 00007fffc3ac6a20 [ 41.653221] [ 41.653511] [ 41.653724] Allocated by task 212: [ 41.654153] kasan_save_stack+0x22/0x50 [ 41.654654] kasan_set_track+0x25/0x30 [ 41.655151] __kasan_slab_alloc+0x59/0x70 [ 41.655677] kmem_cache_alloc+0x16b/0x370 [ 41.656192] vm_area_dup+0x20/0x160 [ 41.656642] __split_vma+0x170/0x950 [ 41.657107] split_vma+0xc6/0x110 [ 41.657544] mprotect_fixup+0x8d2/0xb30 [ 41.658060] do_mprotect_pkey+0x87e/0xd40 [ 41.658576] __x64_sys_mprotect+0x78/0xc0 [ 41.659094] do_syscall_64+0x3f/0x90 [ 41.659587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.660232] [ 41.660449] Freed by task 212: [ 41.660841] kasan_save_stack+0x22/0x50 [ 41.661346] kasan_set_track+0x25/0x30 [ 41.661841] kasan_save_free_info+0x2b/0x50 [ 41.662374] __kasan_slab_free+0x10a/0x190 [ 41.662909] kmem_cache_free+0x10d/0x4d0 [ 41.663415] rcu_core+0x8c8/0x2860 [ 41.663869] __do_softirq+0x1b7/0x7d4 [ 41.664346] [ 41.664567] Last potentially related work creation: [ 41.665144] kasan_save_stack+0x22/0x50 [ 41.665650] __kasan_record_aux_stack+0x8e/0xa0 [ 41.666227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.666868] remove_vma+0x139/0x170 [ 41.667321] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.667881] do_vmi_munmap+0x1f1/0x2b0 [ 41.668367] __vm_munmap+0x138/0x3a0 [ 41.668832] __x64_sys_munmap+0x59/0x80 [ 41.669325] do_syscall_64+0x3f/0x90 [ 41.669793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.670439] [ 41.670653] The buggy address belongs to the object at ffff888019e32d98 [ 41.670653] which belongs to the cache vm_area_struct of size 168 [ 41.672174] The buggy address is located 88 bytes inside of [ 41.672174] freed 168-byte region [ffff888019e32d98, ffff888019e32e40) [ 41.673671] [ 41.673893] The buggy address belongs to the physical page: [ 41.674583] page:000000006093f768 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e32 [ 41.675748] memcg:ffff88800d6cf801 [ 41.676195] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.676869] page_type: 0xffffffff() [ 41.677349] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.678320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6cf801 [ 41.679278] page dumped because: kasan: bad access detected [ 41.679996] [ 41.680224] Memory state around the buggy address: [ 41.680836] ffff888019e32c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 41.681731] ffff888019e32d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 41.682631] >ffff888019e32d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.683527] ^ [ 41.684394] ffff888019e32e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.685293] ffff888019e32e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.686187] ================================================================== [ 41.687179] Disabling lock debugging due to kernel taint [ 43.599181] BUG: Bad rss-counter state mm:00000000d05ee33a type:MM_FILEPAGES val:33 [ 43.600593] BUG: Bad rss-counter state mm:00000000d05ee33a type:MM_ANONPAGES val:22 [ 44.061090] BUG: Bad rss-counter state mm:0000000055b48ca8 type:MM_FILEPAGES val:33 [ 44.062089] BUG: Bad rss-counter state mm:0000000055b48ca8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59141' (ECDSA) to the list of known hosts. 2023/06/19 14:54:16 fuzzer started 2023/06/19 14:54:16 dialing manager at localhost:44161 2023/06/19 14:54:16 checking machine... 2023/06/19 14:54:16 checking revisions... [ 44.809064] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:54:16 testing simple program... [ 44.867759] cgroup: Unknown subsys name 'net' [ 44.913342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:54:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=1ffff11002b21edd RSI=0000000000000001 RDI=ffff88801590f6e8 RBP=ffff88801590f6f0 RSP=ffff88801590f5d8 R8 =ffffffff86088c1e R9 =ffff88801590f6d8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801590f6f8 R13=ffff88801590f6e0 R14=0000000000000004 R15=ffff88801590f698 RIP=ffffffff81131720 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 00007f589ea38900 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=00007ffd4cc51ff8 CR3=000000000e4f0000 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=0000000000000001 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=00007f0079d3a250 CR3=000000000ef56000 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=2035313a34353a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a34353a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000