syzkaller login: [ 38.727492] BUG: Bad rss-counter state mm:000000005f0b5ce6 type:MM_FILEPAGES val:33 [ 38.728385] BUG: Bad rss-counter state mm:000000005f0b5ce6 type:MM_ANONPAGES val:22 [ 38.890715] ================================================================== [ 38.891594] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892478] Read of size 8 at addr ffff88800c628798 by task sshd/218 [ 38.893199] [ 38.893408] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895360] Call Trace: [ 38.895667] [ 38.895940] dump_stack_lvl+0x91/0xf0 [ 38.896409] print_report+0xcc/0x620 [ 38.896871] ? __virt_addr_valid+0x102/0x340 [ 38.897389] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897976] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898556] kasan_report+0xbe/0xf0 [ 38.899022] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899609] vma_interval_tree_remove+0xc75/0xec0 [ 38.900203] vma_prepare+0xc54/0x11a0 [ 38.900691] __split_vma+0x5af/0x950 [ 38.901164] ? __pfx___split_vma+0x10/0x10 [ 38.901690] ? find_held_lock+0x2c/0x110 [ 38.902208] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.902778] ? lock_is_held_type+0x9f/0x120 [ 38.903318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.903928] ? mtree_range_walk+0x632/0x900 [ 38.904472] ? mas_walk+0x5c7/0x7c0 [ 38.904946] do_vmi_munmap+0x1f1/0x2b0 [ 38.905437] mmap_region+0x1f9/0x2660 [ 38.905923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.906425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.907159] ? __pfx_lock_acquire+0x10/0x10 [ 38.907690] ? __pfx_mmap_region+0x10/0x10 [ 38.908219] ? security_mmap_addr+0x7d/0xa0 [ 38.908748] ? get_unmapped_area+0x1f5/0x3f0 [ 38.909324] do_mmap+0x854/0xf00 [ 38.909767] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.910257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.910816] ksys_mmap_pgoff+0x3af/0x500 [ 38.911339] do_syscall_64+0x3f/0x90 [ 38.911817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912460] RIP: 0033:0x7f92e9c41d82 [ 38.912914] 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 [ 38.915063] RSP: 002b:00007ffebad9c788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.915958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92e9c41d82 [ 38.916802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92e907b000 [ 38.917649] RBP: 00007f92e907b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.918491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055849f801f70 [ 38.919349] R13: 00007ffebad9c7a0 R14: 00007ffebad9c7d0 R15: 00007ffebad9cb30 [ 38.920205] [ 38.920489] [ 38.920705] Allocated by task 211: [ 38.921125] kasan_save_stack+0x22/0x50 [ 38.921633] kasan_set_track+0x25/0x30 [ 38.922126] __kasan_slab_alloc+0x59/0x70 [ 38.922650] kmem_cache_alloc+0x16b/0x370 [ 38.923167] vm_area_dup+0x20/0x160 [ 38.923632] __split_vma+0x170/0x950 [ 38.924101] split_vma+0xc6/0x110 [ 38.924533] mprotect_fixup+0x8d2/0xb30 [ 38.925039] do_mprotect_pkey+0x87e/0xd40 [ 38.925549] __x64_sys_mprotect+0x78/0xc0 [ 38.926070] do_syscall_64+0x3f/0x90 [ 38.926551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927208] [ 38.927422] Freed by task 211: [ 38.927808] kasan_save_stack+0x22/0x50 [ 38.928309] kasan_set_track+0x25/0x30 [ 38.928806] kasan_save_free_info+0x2b/0x50 [ 38.929335] __kasan_slab_free+0x10a/0x190 [ 38.929875] kmem_cache_free+0x10d/0x4d0 [ 38.930376] rcu_core+0x8c8/0x2860 [ 38.930824] __do_softirq+0x1b7/0x7d4 [ 38.931307] [ 38.931524] Last potentially related work creation: [ 38.932095] kasan_save_stack+0x22/0x50 [ 38.932658] __kasan_record_aux_stack+0x8e/0xa0 [ 38.933238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933884] remove_vma+0x139/0x170 [ 38.934332] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934957] do_vmi_munmap+0x1f1/0x2b0 [ 38.935452] __vm_munmap+0x138/0x3a0 [ 38.935913] __x64_sys_munmap+0x59/0x80 [ 38.936409] do_syscall_64+0x3f/0x90 [ 38.936883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937520] [ 38.937742] The buggy address belongs to the object at ffff88800c628740 [ 38.937742] which belongs to the cache vm_area_struct of size 168 [ 38.939219] The buggy address is located 88 bytes inside of [ 38.939219] freed 168-byte region [ffff88800c628740, ffff88800c6287e8) [ 38.940622] [ 38.940841] The buggy address belongs to the physical page: [ 38.941502] page:000000006902fa56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc628 [ 38.942609] memcg:ffff8880198a8b01 [ 38.943033] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.943683] page_type: 0xffffffff() [ 38.944133] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.945039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198a8b01 [ 38.945949] page dumped because: kasan: bad access detected [ 38.946608] [ 38.946821] Memory state around the buggy address: [ 38.947414] ffff88800c628680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.948271] ffff88800c628700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.949134] >ffff88800c628780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.949986] ^ [ 38.950474] ffff88800c628800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.951319] ffff88800c628880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.952170] ================================================================== [ 38.953093] Disabling lock debugging due to kernel taint [ 40.975885] BUG: Bad rss-counter state mm:0000000035f968c1 type:MM_FILEPAGES val:33 [ 40.977372] BUG: Bad rss-counter state mm:0000000035f968c1 type:MM_ANONPAGES val:22 [ 41.534476] BUG: Bad rss-counter state mm:000000006ed848f7 type:MM_FILEPAGES val:33 [ 41.535723] BUG: Bad rss-counter state mm:000000006ed848f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13541' (ECDSA) to the list of known hosts. 2023/06/21 03:17:54 fuzzer started 2023/06/21 03:17:55 dialing manager at localhost:36067 2023/06/21 03:17:55 checking machine... 2023/06/21 03:17:55 checking revisions... [ 42.130646] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:17:55 testing simple program... [ 42.176703] cgroup: Unknown subsys name 'net' [ 42.217165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:17:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83ab1b17 RDX=ffff888015e01b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fd9f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000d0500000d05 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0261 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 00007f070e0cb900 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=00007f070e682618 CR3=0000000009470000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c705 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37c01 RSI=ffff888008e37cc0 RDI=ffff888008e37cc0 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff86138e90 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37cc8 R15=ffff888008e37978 RIP=ffffffff81131041 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 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=00007fde05a33380 CR3=0000000015c16000 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=2034353a37313a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a37313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000