syzkaller login: [ 31.567068] BUG: Bad rss-counter state mm:0000000099135a95 type:MM_FILEPAGES val:33 [ 31.568336] BUG: Bad rss-counter state mm:0000000099135a95 type:MM_ANONPAGES val:22 [ 31.724548] ================================================================== [ 31.725636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.726794] Read of size 8 at addr ffff88800e8ba228 by task sshd/220 [ 31.727794] [ 31.728051] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.728951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.729957] Call Trace: [ 31.730297] [ 31.730588] dump_stack_lvl+0x91/0xf0 [ 31.731099] print_report+0xcc/0x620 [ 31.731591] ? __virt_addr_valid+0x102/0x340 [ 31.732180] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.732818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.733461] kasan_report+0xbe/0xf0 [ 31.733967] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.734631] vma_interval_tree_remove+0xc75/0xec0 [ 31.735259] vma_prepare+0xc54/0x11a0 [ 31.735744] __split_vma+0x5af/0x950 [ 31.736255] ? __pfx___split_vma+0x10/0x10 [ 31.736789] ? find_held_lock+0x2c/0x110 [ 31.737321] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.737895] ? lock_is_held_type+0x9f/0x120 [ 31.738457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.739083] ? mtree_range_walk+0x632/0x900 [ 31.739641] ? mas_walk+0x5c7/0x7c0 [ 31.740213] do_vmi_munmap+0x1f1/0x2b0 [ 31.740860] mmap_region+0x1f9/0x2660 [ 31.741509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.742190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.743155] ? __pfx_lock_acquire+0x10/0x10 [ 31.743879] ? __pfx_mmap_region+0x10/0x10 [ 31.744588] ? security_mmap_addr+0x7d/0xa0 [ 31.745244] ? get_unmapped_area+0x1f5/0x3f0 [ 31.745857] do_mmap+0x854/0xf00 [ 31.746335] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.746844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.747431] ksys_mmap_pgoff+0x3af/0x500 [ 31.747967] do_syscall_64+0x3f/0x90 [ 31.748445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.749130] RIP: 0033:0x7fd1de5d3d82 [ 31.749588] 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 [ 31.751769] RSP: 002b:00007ffe66e7a4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.752697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1de5d3d82 [ 31.753578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1dda0d000 [ 31.754467] RBP: 00007fd1dda0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.755342] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560074957ec0 [ 31.756221] R13: 00007ffe66e7a4f0 R14: 00007ffe66e7a520 R15: 00007ffe66e7a880 [ 31.757122] [ 31.757417] [ 31.757629] Allocated by task 213: [ 31.758091] kasan_save_stack+0x22/0x50 [ 31.758624] kasan_set_track+0x25/0x30 [ 31.759144] __kasan_slab_alloc+0x59/0x70 [ 31.759673] kmem_cache_alloc+0x16b/0x370 [ 31.760212] vm_area_dup+0x20/0x160 [ 31.760674] __split_vma+0x170/0x950 [ 31.761176] split_vma+0xc6/0x110 [ 31.761621] mprotect_fixup+0x8d2/0xb30 [ 31.762149] do_mprotect_pkey+0x87e/0xd40 [ 31.762695] __x64_sys_mprotect+0x78/0xc0 [ 31.763234] do_syscall_64+0x3f/0x90 [ 31.763712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764388] [ 31.764606] Freed by task 213: [ 31.765026] kasan_save_stack+0x22/0x50 [ 31.765533] kasan_set_track+0x25/0x30 [ 31.766055] kasan_save_free_info+0x2b/0x50 [ 31.766613] __kasan_slab_free+0x10a/0x190 [ 31.767164] kmem_cache_free+0x10d/0x4d0 [ 31.767679] rcu_core+0x8c8/0x2860 [ 31.768145] __do_softirq+0x1b7/0x7d4 [ 31.768622] [ 31.768837] Last potentially related work creation: [ 31.769451] kasan_save_stack+0x22/0x50 [ 31.769991] __kasan_record_aux_stack+0x8e/0xa0 [ 31.770606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771285] remove_vma+0x139/0x170 [ 31.771756] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772339] do_vmi_munmap+0x1f1/0x2b0 [ 31.772950] __vm_munmap+0x138/0x3a0 [ 31.773599] __x64_sys_munmap+0x59/0x80 [ 31.774270] do_syscall_64+0x3f/0x90 [ 31.774949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775727] [ 31.775971] Second to last potentially related work creation: [ 31.776654] kasan_save_stack+0x22/0x50 [ 31.777179] __kasan_record_aux_stack+0x8e/0xa0 [ 31.777753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.778454] remove_vma+0x139/0x170 [ 31.778938] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.779495] do_vmi_munmap+0x1f1/0x2b0 [ 31.780004] mmap_region+0x1f9/0x2660 [ 31.780486] do_mmap+0x854/0xf00 [ 31.780933] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.781422] ksys_mmap_pgoff+0x3af/0x500 [ 31.781962] do_syscall_64+0x3f/0x90 [ 31.782463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.783124] [ 31.783338] The buggy address belongs to the object at ffff88800e8ba1d0 [ 31.783338] which belongs to the cache vm_area_struct of size 168 [ 31.784841] The buggy address is located 88 bytes inside of [ 31.784841] freed 168-byte region [ffff88800e8ba1d0, ffff88800e8ba278) [ 31.786312] [ 31.786536] The buggy address belongs to the physical page: [ 31.787209] page:000000004995d9bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8ba [ 31.788301] memcg:ffff88800d252d01 [ 31.788731] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.789395] page_type: 0xffffffff() [ 31.789851] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3200 dead000000000008 [ 31.790809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d252d01 [ 31.791738] page dumped because: kasan: bad access detected [ 31.792420] [ 31.792639] Memory state around the buggy address: [ 31.793231] ffff88800e8ba100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.794123] ffff88800e8ba180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.795051] >ffff88800e8ba200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.795943] ^ [ 31.796566] ffff88800e8ba280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.797451] ffff88800e8ba300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.798356] ================================================================== [ 31.799729] Disabling lock debugging due to kernel taint [ 33.398977] BUG: Bad rss-counter state mm:000000001b86fd16 type:MM_FILEPAGES val:33 [ 33.399576] BUG: Bad rss-counter state mm:000000001b86fd16 type:MM_ANONPAGES val:22 [ 33.730684] BUG: Bad rss-counter state mm:0000000036b4463e type:MM_FILEPAGES val:33 [ 33.731261] BUG: Bad rss-counter state mm:0000000036b4463e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63981' (ECDSA) to the list of known hosts. 2023/06/19 21:23:57 fuzzer started 2023/06/19 21:23:57 dialing manager at localhost:44161 2023/06/19 21:23:57 checking machine... 2023/06/19 21:23:57 checking revisions... [ 34.308248] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:23:58 testing simple program... [ 34.355058] cgroup: Unknown subsys name 'net' [ 34.392240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:57 Registers: info registers vcpu 0 RAX=ffffffff85d39604 RBX=00007f230bbebe07 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f230bbebe07 RSP=ffff8880166d6f40 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f230bbeb000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ff09b40 R15=0000000000092800 RIP=ffffffff811fc72c 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 00007f230b059900 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=00007f230b01e008 CR3=000000000df9c000 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=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 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=00007fd5ce7fb510 CR3=000000001839e000 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=2037353a33323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33323a3132203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000