syzkaller login: [ 30.197955] BUG: Bad rss-counter state mm:00000000e26e5b55 type:MM_FILEPAGES val:33 [ 30.199402] BUG: Bad rss-counter state mm:00000000e26e5b55 type:MM_ANONPAGES val:22 [ 30.265126] ================================================================== [ 30.266097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.267119] Read of size 8 at addr ffff88801468c058 by task sshd/220 [ 30.268158] [ 30.268396] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.269331] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.270396] Call Trace: [ 30.270742] [ 30.271063] dump_stack_lvl+0x91/0xf0 [ 30.271589] print_report+0xcc/0x620 [ 30.272108] ? __virt_addr_valid+0x102/0x340 [ 30.272703] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.273373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.274039] kasan_report+0xbe/0xf0 [ 30.274547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.275232] vma_interval_tree_remove+0xc75/0xec0 [ 30.275876] vma_prepare+0xc54/0x11a0 [ 30.276395] __split_vma+0x5af/0x950 [ 30.276899] ? __pfx___split_vma+0x10/0x10 [ 30.277472] ? find_held_lock+0x2c/0x110 [ 30.278033] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.278637] ? lock_is_held_type+0x9f/0x120 [ 30.279235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.279881] ? mtree_range_walk+0x632/0x900 [ 30.280487] ? mas_walk+0x5c7/0x7c0 [ 30.281018] do_vmi_munmap+0x1f1/0x2b0 [ 30.281562] mmap_region+0x1f9/0x2660 [ 30.282098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.282662] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.283459] ? __pfx_lock_acquire+0x10/0x10 [ 30.284049] ? __pfx_mmap_region+0x10/0x10 [ 30.284635] ? security_mmap_addr+0x7d/0xa0 [ 30.285222] ? get_unmapped_area+0x1f5/0x3f0 [ 30.285828] do_mmap+0x854/0xf00 [ 30.286312] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.286875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.287493] ksys_mmap_pgoff+0x3af/0x500 [ 30.288055] do_syscall_64+0x3f/0x90 [ 30.288581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.289298] RIP: 0033:0x7f7950e7bd82 [ 30.289801] 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 [ 30.292182] RSP: 002b:00007ffe7f75c028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.293189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7950e7bd82 [ 30.294122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79502b5000 [ 30.295065] RBP: 00007f79502b5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.296007] R10: 0000000000000812 R11: 0000000000000206 R12: 000055871b128f70 [ 30.296948] R13: 00007ffe7f75c040 R14: 00007ffe7f75c070 R15: 00007ffe7f75c3d0 [ 30.297907] [ 30.298228] [ 30.298465] Allocated by task 212: [ 30.298959] kasan_save_stack+0x22/0x50 [ 30.299516] kasan_set_track+0x25/0x30 [ 30.300063] __kasan_slab_alloc+0x59/0x70 [ 30.300638] kmem_cache_alloc+0x16b/0x370 [ 30.301205] vm_area_dup+0x20/0x160 [ 30.301705] __split_vma+0x170/0x950 [ 30.302223] split_vma+0xc6/0x110 [ 30.302707] mprotect_fixup+0x8d2/0xb30 [ 30.303273] do_mprotect_pkey+0x87e/0xd40 [ 30.303852] __x64_sys_mprotect+0x78/0xc0 [ 30.304430] do_syscall_64+0x3f/0x90 [ 30.304964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305682] [ 30.305919] Freed by task 212: [ 30.306350] kasan_save_stack+0x22/0x50 [ 30.306923] kasan_set_track+0x25/0x30 [ 30.307465] kasan_save_free_info+0x2b/0x50 [ 30.308055] __kasan_slab_free+0x10a/0x190 [ 30.308642] kmem_cache_free+0x10d/0x4d0 [ 30.309277] rcu_core+0x8c8/0x2860 [ 30.309770] __do_softirq+0x1b7/0x7d4 [ 30.310295] [ 30.310530] Last potentially related work creation: [ 30.311196] kasan_save_stack+0x22/0x50 [ 30.311753] __kasan_record_aux_stack+0x8e/0xa0 [ 30.312391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.313098] remove_vma+0x139/0x170 [ 30.313596] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.314217] do_vmi_munmap+0x1f1/0x2b0 [ 30.314755] __vm_munmap+0x138/0x3a0 [ 30.315289] __x64_sys_munmap+0x59/0x80 [ 30.315836] do_syscall_64+0x3f/0x90 [ 30.316358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.317066] [ 30.317301] The buggy address belongs to the object at ffff88801468c000 [ 30.317301] which belongs to the cache vm_area_struct of size 168 [ 30.318940] The buggy address is located 88 bytes inside of [ 30.318940] freed 168-byte region [ffff88801468c000, ffff88801468c0a8) [ 30.320500] [ 30.320743] The buggy address belongs to the physical page: [ 30.321477] page:000000000fb60078 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1468c [ 30.322684] memcg:ffff8880095bdd01 [ 30.323179] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.323895] page_type: 0xffffffff() [ 30.324405] raw: 0100000000000200 ffff88800879fc80 ffffea0000368f00 dead000000000004 [ 30.325424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095bdd01 [ 30.326423] page dumped because: kasan: bad access detected [ 30.327167] [ 30.327406] Memory state around the buggy address: [ 30.328047] ffff88801468bf00: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.328991] ffff88801468bf80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.329932] >ffff88801468c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.330897] ^ [ 30.331707] ffff88801468c080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.332655] ffff88801468c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.333601] ================================================================== [ 30.334690] Disabling lock debugging due to kernel taint [ 32.230708] BUG: Bad rss-counter state mm:00000000a7e5b626 type:MM_FILEPAGES val:33 [ 32.231938] BUG: Bad rss-counter state mm:00000000a7e5b626 type:MM_ANONPAGES val:22 [ 32.676931] BUG: Bad rss-counter state mm:000000007db69834 type:MM_FILEPAGES val:33 [ 32.678052] BUG: Bad rss-counter state mm:000000007db69834 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39363' (ECDSA) to the list of known hosts. 2023/06/20 07:17:33 fuzzer started 2023/06/20 07:17:33 dialing manager at localhost:44161 2023/06/20 07:17:33 checking machine... 2023/06/20 07:17:33 checking revisions... [ 33.428315] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:17:34 testing simple program... [ 33.469960] cgroup: Unknown subsys name 'net' [ 33.510841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:17:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffff888006b0fd28 RBP=ffff888006b0fd28 RSP=ffff888006b0fc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=1ffff11000d61fa7 R14=ffff888006b0fe30 R15=ffffc90000648048 RIP=ffffffff815a2975 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 00007f28382f5900 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=000055bb88ee0768 CR3=000000000d8ea000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=71ff5a8cb4cd338e00000000000ae988 XMM05=33f44a8237d68f4500000000001351b0 XMM06=19e9129bd510f2350000000000134318 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffe728ae998 CR3=0000000005482000 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=00007f11629af510000055f5a2c30790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000