syzkaller login: [ 31.818704] BUG: Bad rss-counter state mm:000000009d37ceef type:MM_FILEPAGES val:33 [ 31.819689] BUG: Bad rss-counter state mm:000000009d37ceef type:MM_ANONPAGES val:22 [ 31.915094] ================================================================== [ 31.915599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.916122] Read of size 8 at addr ffff888016c87968 by task sshd/219 [ 31.916560] [ 31.916685] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.917153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.917686] Call Trace: [ 31.917863] [ 31.918017] dump_stack_lvl+0x91/0xf0 [ 31.918289] print_report+0xcc/0x620 [ 31.918554] ? __virt_addr_valid+0x102/0x340 [ 31.918859] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919194] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919532] kasan_report+0xbe/0xf0 [ 31.919794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920134] vma_interval_tree_remove+0xc75/0xec0 [ 31.920464] vma_prepare+0xc54/0x11a0 [ 31.920832] __split_vma+0x5af/0x950 [ 31.921085] ? __pfx___split_vma+0x10/0x10 [ 31.921371] ? find_held_lock+0x2c/0x110 [ 31.921657] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.921965] ? lock_is_held_type+0x9f/0x120 [ 31.922258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.922588] ? mtree_range_walk+0x632/0x900 [ 31.922903] ? mas_walk+0x5c7/0x7c0 [ 31.923159] do_vmi_munmap+0x1f1/0x2b0 [ 31.923427] mmap_region+0x1f9/0x2660 [ 31.923686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.923965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.924347] ? __pfx_lock_acquire+0x10/0x10 [ 31.924640] ? __pfx_mmap_region+0x10/0x10 [ 31.924949] ? security_mmap_addr+0x7d/0xa0 [ 31.925255] ? get_unmapped_area+0x1f5/0x3f0 [ 31.925570] do_mmap+0x854/0xf00 [ 31.925821] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.926101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.926416] ksys_mmap_pgoff+0x3af/0x500 [ 31.926703] do_syscall_64+0x3f/0x90 [ 31.926978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.927347] RIP: 0033:0x7fe199b79d82 [ 31.927607] 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 [ 31.928858] RSP: 002b:00007ffdeef44778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.929375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe199b79d82 [ 31.929859] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe198fb3000 [ 31.930344] RBP: 00007fe198fb3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.930825] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc221f6980 [ 31.931315] R13: 00007ffdeef44790 R14: 00007ffdeef447c0 R15: 00007ffdeef44b20 [ 31.931803] [ 31.931971] [ 31.932091] Allocated by task 212: [ 31.932334] kasan_save_stack+0x22/0x50 [ 31.932626] kasan_set_track+0x25/0x30 [ 31.932910] __kasan_slab_alloc+0x59/0x70 [ 31.933210] kmem_cache_alloc+0x16b/0x370 [ 31.933500] vm_area_dup+0x20/0x160 [ 31.933755] __split_vma+0x170/0x950 [ 31.934024] split_vma+0xc6/0x110 [ 31.934271] mprotect_fixup+0x8d2/0xb30 [ 31.934560] do_mprotect_pkey+0x87e/0xd40 [ 31.934856] __x64_sys_mprotect+0x78/0xc0 [ 31.935152] do_syscall_64+0x3f/0x90 [ 31.935419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.935788] [ 31.935909] Freed by task 209: [ 31.936132] kasan_save_stack+0x22/0x50 [ 31.936418] kasan_set_track+0x25/0x30 [ 31.936706] kasan_save_free_info+0x2b/0x50 [ 31.937009] __kasan_slab_free+0x10a/0x190 [ 31.937308] kmem_cache_free+0x10d/0x4d0 [ 31.937595] rcu_core+0x8c8/0x2860 [ 31.937846] __do_softirq+0x1b7/0x7d4 [ 31.938128] [ 31.938250] Last potentially related work creation: [ 31.938588] kasan_save_stack+0x22/0x50 [ 31.938873] __kasan_record_aux_stack+0x8e/0xa0 [ 31.939201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.939568] remove_vma+0x139/0x170 [ 31.939826] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.940140] do_vmi_munmap+0x1f1/0x2b0 [ 31.940417] __vm_munmap+0x138/0x3a0 [ 31.940691] __x64_sys_munmap+0x59/0x80 [ 31.940973] do_syscall_64+0x3f/0x90 [ 31.941242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.941615] [ 31.941739] The buggy address belongs to the object at ffff888016c87910 [ 31.941739] which belongs to the cache vm_area_struct of size 168 [ 31.942592] The buggy address is located 88 bytes inside of [ 31.942592] freed 168-byte region [ffff888016c87910, ffff888016c879b8) [ 31.943399] [ 31.943520] The buggy address belongs to the physical page: [ 31.943899] page:00000000d8c29a38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c87 [ 31.944533] memcg:ffff88800dd80301 [ 31.944780] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.945154] page_type: 0xffffffff() [ 31.945410] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.945931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd80301 [ 31.946450] page dumped because: kasan: bad access detected [ 31.946830] [ 31.946952] Memory state around the buggy address: [ 31.947285] ffff888016c87800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.947785] ffff888016c87880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.948275] >ffff888016c87900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.948773] ^ [ 31.949220] ffff888016c87980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.949712] ffff888016c87a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.950194] ================================================================== [ 31.950884] Disabling lock debugging due to kernel taint [ 33.865043] BUG: Bad rss-counter state mm:00000000a03857c3 type:MM_FILEPAGES val:33 [ 33.866018] BUG: Bad rss-counter state mm:00000000a03857c3 type:MM_ANONPAGES val:22 [ 34.437496] BUG: Bad rss-counter state mm:00000000fc814b3e type:MM_FILEPAGES val:33 [ 34.438654] BUG: Bad rss-counter state mm:00000000fc814b3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42120' (ECDSA) to the list of known hosts. 2023/06/19 11:38:40 fuzzer started 2023/06/19 11:38:40 dialing manager at localhost:44161 2023/06/19 11:38:40 checking machine... 2023/06/19 11:38:40 checking revisions... [ 35.082833] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:38:40 testing simple program... [ 35.135365] cgroup: Unknown subsys name 'net' [ 35.192273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:38:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffff893aad8 CR3=0000000005482000 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=00007fbe8c3d751000005632a39a4790 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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d89f0e RSI=ffffffff83874fbc RDI=ffff888016c4f708 RBP=ffff888016c4f7a0 RSP=ffff888016c4f708 R8 =0000000000000001 R9 =ffff888016c4f748 R10=0000000000038001 R11=000000000008b5c6 R12=ffff888016c4f7d0 R13=0000000000000000 R14=ffff888017333680 R15=0000000000082cc0 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007f79bca1c900 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=00007ffe251c3000 CR3=000000000fe76000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000