syzkaller login: [ 30.683807] BUG: Bad rss-counter state mm:00000000dd4cf509 type:MM_FILEPAGES val:33 [ 30.685065] BUG: Bad rss-counter state mm:00000000dd4cf509 type:MM_ANONPAGES val:22 [ 30.832593] ================================================================== [ 30.833506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.834458] Read of size 8 at addr ffff888017ec1058 by task sshd/220 [ 30.835326] [ 30.835617] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.836479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.837462] Call Trace: [ 30.837947] [ 30.838300] dump_stack_lvl+0x91/0xf0 [ 30.838885] print_report+0xcc/0x620 [ 30.839462] ? __virt_addr_valid+0x102/0x340 [ 30.840110] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.840833] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841561] kasan_report+0xbe/0xf0 [ 30.842146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842904] vma_interval_tree_remove+0xc75/0xec0 [ 30.843640] vma_prepare+0xc54/0x11a0 [ 30.844224] __split_vma+0x5af/0x950 [ 30.844802] ? __pfx___split_vma+0x10/0x10 [ 30.845446] ? find_held_lock+0x2c/0x110 [ 30.846089] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.846644] ? lock_is_held_type+0x9f/0x120 [ 30.847177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.847772] ? mtree_range_walk+0x632/0x900 [ 30.848318] ? mas_walk+0x5c7/0x7c0 [ 30.848788] do_vmi_munmap+0x1f1/0x2b0 [ 30.849279] mmap_region+0x1f9/0x2660 [ 30.849760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.850279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.850986] ? __pfx_lock_acquire+0x10/0x10 [ 30.851514] ? __pfx_mmap_region+0x10/0x10 [ 30.852038] ? security_mmap_addr+0x7d/0xa0 [ 30.852564] ? get_unmapped_area+0x1f5/0x3f0 [ 30.853115] do_mmap+0x854/0xf00 [ 30.853549] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.854052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.854607] ksys_mmap_pgoff+0x3af/0x500 [ 30.855112] do_syscall_64+0x3f/0x90 [ 30.855590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856232] RIP: 0033:0x7fc8064c9d82 [ 30.856684] 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 [ 30.858804] RSP: 002b:00007ffda7008398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.859697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8064c9d82 [ 30.860538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc805903000 [ 30.861372] RBP: 00007fc805903000 R08: 0000000000000009 R09: 0000000000001000 [ 30.862233] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a969dabf60 [ 30.863085] R13: 00007ffda70083b0 R14: 00007ffda70083e0 R15: 00007ffda7008740 [ 30.863935] [ 30.864226] [ 30.864445] Allocated by task 213: [ 30.864869] kasan_save_stack+0x22/0x50 [ 30.865370] kasan_set_track+0x25/0x30 [ 30.865879] __kasan_slab_alloc+0x59/0x70 [ 30.866404] kmem_cache_alloc+0x16b/0x370 [ 30.866914] vm_area_dup+0x20/0x160 [ 30.867363] __split_vma+0x170/0x950 [ 30.867825] split_vma+0xc6/0x110 [ 30.868259] mprotect_fixup+0x8d2/0xb30 [ 30.868758] do_mprotect_pkey+0x87e/0xd40 [ 30.869273] __x64_sys_mprotect+0x78/0xc0 [ 30.869790] do_syscall_64+0x3f/0x90 [ 30.870258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870898] [ 30.871112] Freed by task 213: [ 30.871501] kasan_save_stack+0x22/0x50 [ 30.871997] kasan_set_track+0x25/0x30 [ 30.872488] kasan_save_free_info+0x2b/0x50 [ 30.873013] __kasan_slab_free+0x10a/0x190 [ 30.873538] kmem_cache_free+0x10d/0x4d0 [ 30.874053] rcu_core+0x8c8/0x2860 [ 30.874493] __do_softirq+0x1b7/0x7d4 [ 30.874969] [ 30.875184] Last potentially related work creation: [ 30.875768] kasan_save_stack+0x22/0x50 [ 30.876406] __kasan_record_aux_stack+0x8e/0xa0 [ 30.876976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.877616] remove_vma+0x139/0x170 [ 30.878085] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.878643] do_vmi_munmap+0x1f1/0x2b0 [ 30.879128] __vm_munmap+0x138/0x3a0 [ 30.879610] __x64_sys_munmap+0x59/0x80 [ 30.880124] do_syscall_64+0x3f/0x90 [ 30.880594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881234] [ 30.881447] The buggy address belongs to the object at ffff888017ec1000 [ 30.881447] which belongs to the cache vm_area_struct of size 168 [ 30.882924] The buggy address is located 88 bytes inside of [ 30.882924] freed 168-byte region [ffff888017ec1000, ffff888017ec10a8) [ 30.884316] [ 30.884531] The buggy address belongs to the physical page: [ 30.885181] page:0000000090b452b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ec1 [ 30.886289] memcg:ffff88800f1dac01 [ 30.886710] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.887345] page_type: 0xffffffff() [ 30.887801] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.888711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1dac01 [ 30.889610] page dumped because: kasan: bad access detected [ 30.890273] [ 30.890486] Memory state around the buggy address: [ 30.891059] ffff888017ec0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.891905] ffff888017ec0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.892760] >ffff888017ec1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.893606] ^ [ 30.894364] ffff888017ec1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.895216] ffff888017ec1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.896068] ================================================================== [ 30.897007] Disabling lock debugging due to kernel taint [ 33.020688] BUG: Bad rss-counter state mm:00000000f5675081 type:MM_FILEPAGES val:33 [ 33.021604] BUG: Bad rss-counter state mm:00000000f5675081 type:MM_ANONPAGES val:22 [ 33.524872] BUG: Bad rss-counter state mm:000000007d45587b type:MM_FILEPAGES val:33 [ 33.526051] BUG: Bad rss-counter state mm:000000007d45587b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60326' (ECDSA) to the list of known hosts. 2023/06/21 01:08:34 fuzzer started 2023/06/21 01:08:35 dialing manager at localhost:36067 2023/06/21 01:08:35 checking machine... 2023/06/21 01:08:35 checking revisions... [ 34.110228] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:08:35 testing simple program... [ 34.153538] cgroup: Unknown subsys name 'net' [ 34.205477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:34 Registers: info registers vcpu 0 RAX=0000000000000009 RBX=0000000000000001 RCX=ffffffff8363e063 RDX=0000000000000009 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a10 R8 =ffffffff863b3bde R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008aa79 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc16 RFL=00000216 [----AP-] 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 00007f36f3b8b900 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=00007ffd6d88e000 CR3=000000001a17c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f133b5c6e70 CR3=0000000018986000 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=2034333a38303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000