syzkaller login: [ 30.597123] BUG: Bad rss-counter state mm:00000000b3ef994d type:MM_FILEPAGES val:33 [ 30.598592] BUG: Bad rss-counter state mm:00000000b3ef994d type:MM_ANONPAGES val:22 [ 30.765754] ================================================================== [ 30.766674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767651] Read of size 8 at addr ffff888019cf3ed8 by task sshd/220 [ 30.768439] [ 30.768776] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.769654] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770639] Call Trace: [ 30.770978] [ 30.771279] dump_stack_lvl+0x91/0xf0 [ 30.771771] print_report+0xcc/0x620 [ 30.772262] ? __virt_addr_valid+0x102/0x340 [ 30.772809] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773437] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774052] kasan_report+0xbe/0xf0 [ 30.774533] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775167] vma_interval_tree_remove+0xc75/0xec0 [ 30.775772] vma_prepare+0xc54/0x11a0 [ 30.776260] __split_vma+0x5af/0x950 [ 30.776729] ? __pfx___split_vma+0x10/0x10 [ 30.777259] ? find_held_lock+0x2c/0x110 [ 30.777786] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.778355] ? lock_is_held_type+0x9f/0x120 [ 30.778895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.779523] ? mtree_range_walk+0x632/0x900 [ 30.780107] ? mas_walk+0x5c7/0x7c0 [ 30.780583] do_vmi_munmap+0x1f1/0x2b0 [ 30.781077] mmap_region+0x1f9/0x2660 [ 30.781567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.782094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782827] ? __pfx_lock_acquire+0x10/0x10 [ 30.783382] ? __pfx_mmap_region+0x10/0x10 [ 30.783916] ? security_mmap_addr+0x7d/0xa0 [ 30.784458] ? get_unmapped_area+0x1f5/0x3f0 [ 30.785015] do_mmap+0x854/0xf00 [ 30.785464] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786535] ksys_mmap_pgoff+0x3af/0x500 [ 30.787067] do_syscall_64+0x3f/0x90 [ 30.787557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788200] RIP: 0033:0x7f87f0c2cd82 [ 30.788662] 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 [ 30.790796] RSP: 002b:00007fff4f0fc7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.791713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87f0c2cd82 [ 30.792567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87f0066000 [ 30.793410] RBP: 00007f87f0066000 R08: 0000000000000009 R09: 0000000000001000 [ 30.794254] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f31bb0eec0 [ 30.795111] R13: 00007fff4f0fc7f0 R14: 00007fff4f0fc820 R15: 00007fff4f0fcb80 [ 30.795974] [ 30.796265] [ 30.796483] Allocated by task 213: [ 30.796909] kasan_save_stack+0x22/0x50 [ 30.797418] kasan_set_track+0x25/0x30 [ 30.797911] __kasan_slab_alloc+0x59/0x70 [ 30.798440] kmem_cache_alloc+0x16b/0x370 [ 30.798966] vm_area_dup+0x20/0x160 [ 30.799449] __split_vma+0x170/0x950 [ 30.799917] split_vma+0xc6/0x110 [ 30.800358] mprotect_fixup+0x8d2/0xb30 [ 30.800866] do_mprotect_pkey+0x87e/0xd40 [ 30.801400] __x64_sys_mprotect+0x78/0xc0 [ 30.801931] do_syscall_64+0x3f/0x90 [ 30.802427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803097] [ 30.803311] Freed by task 213: [ 30.803721] kasan_save_stack+0x22/0x50 [ 30.804250] kasan_set_track+0x25/0x30 [ 30.804755] kasan_save_free_info+0x2b/0x50 [ 30.805301] __kasan_slab_free+0x10a/0x190 [ 30.805838] kmem_cache_free+0x10d/0x4d0 [ 30.806356] rcu_core+0x8c8/0x2860 [ 30.806809] __do_softirq+0x1b7/0x7d4 [ 30.807299] [ 30.807521] Last potentially related work creation: [ 30.808128] kasan_save_stack+0x22/0x50 [ 30.808656] __kasan_record_aux_stack+0x8e/0xa0 [ 30.809258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809923] remove_vma+0x139/0x170 [ 30.810402] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.811010] do_vmi_munmap+0x1f1/0x2b0 [ 30.811525] __vm_munmap+0x138/0x3a0 [ 30.812019] __x64_sys_munmap+0x59/0x80 [ 30.812544] do_syscall_64+0x3f/0x90 [ 30.813038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813701] [ 30.813924] The buggy address belongs to the object at ffff888019cf3e80 [ 30.813924] which belongs to the cache vm_area_struct of size 168 [ 30.815454] The buggy address is located 88 bytes inside of [ 30.815454] freed 168-byte region [ffff888019cf3e80, ffff888019cf3f28) [ 30.816920] [ 30.817148] The buggy address belongs to the physical page: [ 30.817838] page:00000000d0c33065 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cf3 [ 30.818961] memcg:ffff888018ffd301 [ 30.819415] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.820080] page_type: 0xffffffff() [ 30.820548] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.821514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ffd301 [ 30.822471] page dumped because: kasan: bad access detected [ 30.823184] [ 30.823404] Memory state around the buggy address: [ 30.824006] ffff888019cf3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.824897] ffff888019cf3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.825785] >ffff888019cf3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826673] ^ [ 30.827436] ffff888019cf3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.828346] ffff888019cf3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.829241] ================================================================== [ 30.830255] Disabling lock debugging due to kernel taint [ 33.119600] BUG: Bad rss-counter state mm:0000000082b3f130 type:MM_FILEPAGES val:33 [ 33.120819] BUG: Bad rss-counter state mm:0000000082b3f130 type:MM_ANONPAGES val:22 [ 33.584562] BUG: Bad rss-counter state mm:0000000066bc9505 type:MM_FILEPAGES val:33 [ 33.585550] BUG: Bad rss-counter state mm:0000000066bc9505 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24455' (ECDSA) to the list of known hosts. 2023/06/20 02:46:11 fuzzer started 2023/06/20 02:46:11 dialing manager at localhost:44161 2023/06/20 02:46:11 checking machine... 2023/06/20 02:46:11 checking revisions... [ 34.324385] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:46:11 testing simple program... [ 34.373535] cgroup: Unknown subsys name 'net' [ 34.506880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:46:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880147bf540 RCX=ffff8880147c0000 RDX=0000000000000001 RSI=0000000000000001 RDI=ffff8880147bf458 RBP=ffff8880145cd1c0 RSP=ffff8880147bf458 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880147bf4a8 R11=00000000000b6c88 R12=ffff8880147bf4c8 R13=ffff8880147bf4d0 R14=ffff8880147bf4f0 R15=ffff8880147bf4a8 RIP=ffffffff81132f42 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a7c4bb900 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=00007f4a7b8b8378 CR3=000000000cae2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=54ea447f9e1acf2f00000000000ae988 XMM05=655e63cb8fd2528600000000001356d0 XMM06=19e9129bd510f2350000000000134818 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000558eabbd46f0 RCX=00007f39f4bb56c3 RDX=0000000000000000 RSI=0000000000000000 RDI=0000558eabbd4c20 RBP=0000000000000000 RSP=00007ffd1b8bbf38 R8 =0000558eabbe4160 R9 =00007ffd1b8b52b8 R10=0000558eabbe32a0 R11=0000000000000246 R12=00000000ffffffe3 R13=0000558eaa8161c0 R14=00007ffd1b8bc2d0 R15=00007ffd1b8bc080 RIP=00007f39f51f8450 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f39f46d2900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd1b8b6000 CR3=000000001cc9e000 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