syzkaller login: [ 38.684906] BUG: Bad rss-counter state mm:00000000fb6ba641 type:MM_FILEPAGES val:33 [ 38.685995] BUG: Bad rss-counter state mm:00000000fb6ba641 type:MM_ANONPAGES val:22 [ 38.845057] ================================================================== [ 38.846071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.847077] Read of size 8 at addr ffff88800d882058 by task sshd/218 [ 38.848060] [ 38.848294] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.849221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.850312] Call Trace: [ 38.850661] [ 38.850964] dump_stack_lvl+0x91/0xf0 [ 38.851498] print_report+0xcc/0x620 [ 38.852035] ? __virt_addr_valid+0x102/0x340 [ 38.852635] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853317] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853997] kasan_report+0xbe/0xf0 [ 38.854528] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.855199] vma_interval_tree_remove+0xc75/0xec0 [ 38.855843] vma_prepare+0xc54/0x11a0 [ 38.856357] __split_vma+0x5af/0x950 [ 38.856867] ? __pfx___split_vma+0x10/0x10 [ 38.857435] ? find_held_lock+0x2c/0x110 [ 38.858017] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.858626] ? lock_is_held_type+0x9f/0x120 [ 38.859199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.859843] ? mtree_range_walk+0x632/0x900 [ 38.860432] ? mas_walk+0x5c7/0x7c0 [ 38.860938] do_vmi_munmap+0x1f1/0x2b0 [ 38.861469] mmap_region+0x1f9/0x2660 [ 38.862008] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.862573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.863360] ? __pfx_lock_acquire+0x10/0x10 [ 38.863954] ? __pfx_mmap_region+0x10/0x10 [ 38.864547] ? security_mmap_addr+0x7d/0xa0 [ 38.865148] ? get_unmapped_area+0x1f5/0x3f0 [ 38.865773] do_mmap+0x854/0xf00 [ 38.866260] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.866810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.867432] ksys_mmap_pgoff+0x3af/0x500 [ 38.867994] do_syscall_64+0x3f/0x90 [ 38.868552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869283] RIP: 0033:0x7fa472301d82 [ 38.869837] 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 [ 38.872208] RSP: 002b:00007fff755e5e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.873261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa472301d82 [ 38.874221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa47173b000 [ 38.875171] RBP: 00007fa47173b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.876122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cff6cb1ec0 [ 38.877107] R13: 00007fff755e5e50 R14: 00007fff755e5e80 R15: 00007fff755e61e0 [ 38.878075] [ 38.878401] [ 38.878640] Allocated by task 211: [ 38.879116] kasan_save_stack+0x22/0x50 [ 38.879687] kasan_set_track+0x25/0x30 [ 38.880237] __kasan_slab_alloc+0x59/0x70 [ 38.880862] kmem_cache_alloc+0x16b/0x370 [ 38.881444] vm_area_dup+0x20/0x160 [ 38.881975] __split_vma+0x170/0x950 [ 38.882504] split_vma+0xc6/0x110 [ 38.882993] mprotect_fixup+0x8d2/0xb30 [ 38.883554] do_mprotect_pkey+0x87e/0xd40 [ 38.884132] __x64_sys_mprotect+0x78/0xc0 [ 38.884755] do_syscall_64+0x3f/0x90 [ 38.885289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886020] [ 38.886259] Freed by task 211: [ 38.886694] kasan_save_stack+0x22/0x50 [ 38.887254] kasan_set_track+0x25/0x30 [ 38.887808] kasan_save_free_info+0x2b/0x50 [ 38.888396] __kasan_slab_free+0x10a/0x190 [ 38.889021] kmem_cache_free+0x10d/0x4d0 [ 38.889732] rcu_core+0x8c8/0x2860 [ 38.890229] __do_softirq+0x1b7/0x7d4 [ 38.890760] [ 38.891002] Last potentially related work creation: [ 38.891656] kasan_save_stack+0x22/0x50 [ 38.892216] __kasan_record_aux_stack+0x8e/0xa0 [ 38.892862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893619] remove_vma+0x139/0x170 [ 38.894165] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894787] do_vmi_munmap+0x1f1/0x2b0 [ 38.895323] __vm_munmap+0x138/0x3a0 [ 38.895847] __x64_sys_munmap+0x59/0x80 [ 38.896394] do_syscall_64+0x3f/0x90 [ 38.896920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897692] [ 38.897932] Second to last potentially related work creation: [ 38.898695] kasan_save_stack+0x22/0x50 [ 38.899263] __kasan_record_aux_stack+0x8e/0xa0 [ 38.899906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.900626] remove_vma+0x139/0x170 [ 38.901128] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.901806] do_vmi_munmap+0x1f1/0x2b0 [ 38.902350] __vm_munmap+0x138/0x3a0 [ 38.902874] __x64_sys_munmap+0x59/0x80 [ 38.903428] do_syscall_64+0x3f/0x90 [ 38.903960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904681] [ 38.904921] The buggy address belongs to the object at ffff88800d882000 [ 38.904921] which belongs to the cache vm_area_struct of size 168 [ 38.906622] The buggy address is located 88 bytes inside of [ 38.906622] freed 168-byte region [ffff88800d882000, ffff88800d8820a8) [ 38.908197] [ 38.908438] The buggy address belongs to the physical page: [ 38.909174] page:0000000003660c16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd882 [ 38.910443] memcg:ffff88800e7cc001 [ 38.910920] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.911703] page_type: 0xffffffff() [ 38.912206] raw: 0100000000000200 ffff8880087a0c80 ffffea0000253ac0 dead000000000005 [ 38.913232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7cc001 [ 38.914302] page dumped because: kasan: bad access detected [ 38.915050] [ 38.915288] Memory state around the buggy address: [ 38.915941] ffff88800d881f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.916918] ffff88800d881f80: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.917901] >ffff88800d882000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.918863] ^ [ 38.919669] ffff88800d882080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.920671] ffff88800d882100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.921622] ================================================================== [ 38.922831] Disabling lock debugging due to kernel taint [ 41.720560] BUG: Bad rss-counter state mm:0000000048ec16f9 type:MM_FILEPAGES val:33 [ 41.721351] BUG: Bad rss-counter state mm:0000000048ec16f9 type:MM_ANONPAGES val:22 [ 42.193112] BUG: Bad rss-counter state mm:00000000a8789a88 type:MM_FILEPAGES val:33 [ 42.194307] BUG: Bad rss-counter state mm:00000000a8789a88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51473' (ECDSA) to the list of known hosts. 2023/06/21 09:24:28 fuzzer started 2023/06/21 09:24:28 dialing manager at localhost:36067 2023/06/21 09:24:28 checking machine... 2023/06/21 09:24:28 checking revisions... [ 42.926238] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:24:28 testing simple program... [ 42.980515] cgroup: Unknown subsys name 'net' [ 43.037322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:28 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff86607973 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff81007b50 RDI=ffffffff86607973 RBP=ffffffff86607973 RSP=ffff88806ce099f8 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b54e7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800de75f00 RIP=ffffffff814c0880 RFL=00000206 [-----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 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=00005576bb31a768 CR3=0000000019cce000 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=2037323a34323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81846193 RDX=0000000000008461 RSI=0000000000008461 RDI=ffffffff8650ab74 RBP=ffff88800db775b8 RSP=ffff88800db774f0 R8 =0000000000000000 R9 =ffff88800db775a0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800db775c0 R13=ffff88800db775a8 R14=ffff88800db775a1 R15=ffff88800db77560 RIP=ffffffff8113077a RFL=00000213 [----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 00007fad2f896900 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=00007ffdf4cf5000 CR3=0000000018ed2000 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=6720646572637465733a4d41503d706f 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