syzkaller login: [ 36.458779] BUG: Bad rss-counter state mm:00000000be796852 type:MM_FILEPAGES val:33 [ 36.460699] BUG: Bad rss-counter state mm:00000000be796852 type:MM_ANONPAGES val:22 [ 36.629290] ================================================================== [ 36.630206] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.631162] Read of size 8 at addr ffff888019afe3f8 by task sshd/221 [ 36.631949] [ 36.632253] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.633143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.634135] Call Trace: [ 36.634477] [ 36.634768] dump_stack_lvl+0x91/0xf0 [ 36.635252] print_report+0xcc/0x620 [ 36.635731] ? __virt_addr_valid+0x102/0x340 [ 36.636284] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.636902] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.637512] kasan_report+0xbe/0xf0 [ 36.637982] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.638598] vma_interval_tree_remove+0xc75/0xec0 [ 36.639216] vma_prepare+0xc54/0x11a0 [ 36.639689] __split_vma+0x5af/0x950 [ 36.640162] ? __pfx___split_vma+0x10/0x10 [ 36.640683] ? find_held_lock+0x2c/0x110 [ 36.641198] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.641754] ? lock_is_held_type+0x9f/0x120 [ 36.642294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.642911] ? mtree_range_walk+0x632/0x900 [ 36.643464] ? mas_walk+0x5c7/0x7c0 [ 36.643939] do_vmi_munmap+0x1f1/0x2b0 [ 36.644429] mmap_region+0x1f9/0x2660 [ 36.644906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.645414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.646119] ? __pfx_lock_acquire+0x10/0x10 [ 36.646648] ? __pfx_mmap_region+0x10/0x10 [ 36.647200] ? security_mmap_addr+0x7d/0xa0 [ 36.647731] ? get_unmapped_area+0x1f5/0x3f0 [ 36.648281] do_mmap+0x854/0xf00 [ 36.648721] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.649214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.649775] ksys_mmap_pgoff+0x3af/0x500 [ 36.650286] do_syscall_64+0x3f/0x90 [ 36.650774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.651415] RIP: 0033:0x7f3cd028ed82 [ 36.651868] 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 [ 36.653969] RSP: 002b:00007ffe46ad8318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.654874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cd028ed82 [ 36.655721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ccf6c8000 [ 36.656564] RBP: 00007f3ccf6c8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.657409] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b5ab8bec0 [ 36.658258] R13: 00007ffe46ad8330 R14: 00007ffe46ad8360 R15: 00007ffe46ad86c0 [ 36.659126] [ 36.659422] [ 36.659633] Allocated by task 214: [ 36.660059] kasan_save_stack+0x22/0x50 [ 36.660566] kasan_set_track+0x25/0x30 [ 36.661058] __kasan_slab_alloc+0x59/0x70 [ 36.661578] kmem_cache_alloc+0x16b/0x370 [ 36.662089] vm_area_dup+0x20/0x160 [ 36.662541] __split_vma+0x170/0x950 [ 36.663004] split_vma+0xc6/0x110 [ 36.663442] mprotect_fixup+0x8d2/0xb30 [ 36.663941] do_mprotect_pkey+0x87e/0xd40 [ 36.664462] __x64_sys_mprotect+0x78/0xc0 [ 36.664977] do_syscall_64+0x3f/0x90 [ 36.665451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.666093] [ 36.666305] Freed by task 214: [ 36.666698] kasan_save_stack+0x22/0x50 [ 36.667208] kasan_set_track+0x25/0x30 [ 36.667740] kasan_save_free_info+0x2b/0x50 [ 36.668314] __kasan_slab_free+0x10a/0x190 [ 36.668908] kmem_cache_free+0x10d/0x4d0 [ 36.669452] rcu_core+0x8c8/0x2860 [ 36.669932] __do_softirq+0x1b7/0x7d4 [ 36.670450] [ 36.670682] Last potentially related work creation: [ 36.671329] kasan_save_stack+0x22/0x50 [ 36.671867] __kasan_record_aux_stack+0x8e/0xa0 [ 36.672484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.673175] remove_vma+0x139/0x170 [ 36.673658] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.674256] do_vmi_munmap+0x1f1/0x2b0 [ 36.674785] __vm_munmap+0x138/0x3a0 [ 36.675285] __x64_sys_munmap+0x59/0x80 [ 36.675829] do_syscall_64+0x3f/0x90 [ 36.676338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.676974] [ 36.677189] The buggy address belongs to the object at ffff888019afe3a0 [ 36.677189] which belongs to the cache vm_area_struct of size 168 [ 36.678657] The buggy address is located 88 bytes inside of [ 36.678657] freed 168-byte region [ffff888019afe3a0, ffff888019afe448) [ 36.680090] [ 36.680306] The buggy address belongs to the physical page: [ 36.680970] page:00000000d791fa22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19afe [ 36.682092] memcg:ffff88800f451301 [ 36.682521] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.683188] page_type: 0xffffffff() [ 36.683642] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.684573] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f451301 [ 36.685485] page dumped because: kasan: bad access detected [ 36.686156] [ 36.686373] Memory state around the buggy address: [ 36.686966] ffff888019afe280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.687820] ffff888019afe300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.688713] >ffff888019afe380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.689558] ^ [ 36.690410] ffff888019afe400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.691297] ffff888019afe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.692158] ================================================================== [ 36.693150] Disabling lock debugging due to kernel taint [ 38.740112] BUG: Bad rss-counter state mm:000000001dbc7814 type:MM_FILEPAGES val:33 [ 38.741246] BUG: Bad rss-counter state mm:000000001dbc7814 type:MM_ANONPAGES val:22 [ 39.215459] BUG: Bad rss-counter state mm:00000000f407369e type:MM_FILEPAGES val:33 [ 39.216868] BUG: Bad rss-counter state mm:00000000f407369e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41948' (ECDSA) to the list of known hosts. 2023/06/19 19:32:23 fuzzer started 2023/06/19 19:32:23 dialing manager at localhost:44161 2023/06/19 19:32:23 checking machine... 2023/06/19 19:32:23 checking revisions... [ 39.923501] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:32:23 testing simple program... [ 39.979871] cgroup: Unknown subsys name 'net' [ 40.016323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11002dedfcf RCX=0000000000000000 RDX=ffff888015e051c0 RSI=ffffffff8209ac05 RDI=ffff888015e06680 RBP=0000000000000000 RSP=ffff888016f6fe40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=dffffc0000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007f6bc7891900 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=00007f6bc7e48618 CR3=0000000016e32000 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=563412feff00545000000000000080fe 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=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=00007fb7dd8a7020 CR3=000000000ca84000 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=00000000000000000000000000000000 XMM01=15a0f6ad62d3689ec54a9c9e69483de9 XMM02=ec2efd57dc4c00df000000000011cd90 XMM03=77904530d770a391000000000011ce60 XMM04=77a7d036eaccb09f00000000000ae988 XMM05=59d5b690e0af863b00000000001342f8 XMM06=49a58f03bb363b3a0000000000133160 XMM07=e042d86d42eb936e00000000001249c8 XMM08=77904530d770a391000000000011ce60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000