syzkaller login: [ 39.260753] BUG: Bad rss-counter state mm:00000000562c17e5 type:MM_FILEPAGES val:33 [ 39.262097] BUG: Bad rss-counter state mm:00000000562c17e5 type:MM_ANONPAGES val:22 [ 39.425330] ================================================================== [ 39.426272] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.427215] Read of size 8 at addr ffff888019d69140 by task sshd/220 [ 39.427990] [ 39.428212] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.429211] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.430206] Call Trace: [ 39.430529] [ 39.430815] dump_stack_lvl+0x91/0xf0 [ 39.431340] print_report+0xcc/0x620 [ 39.431826] ? __virt_addr_valid+0x102/0x340 [ 39.432385] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.433004] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.433639] kasan_report+0xbe/0xf0 [ 39.434118] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.434744] vma_interval_tree_remove+0xc75/0xec0 [ 39.435343] vma_prepare+0xc54/0x11a0 [ 39.435825] __split_vma+0x5af/0x950 [ 39.436293] ? __pfx___split_vma+0x10/0x10 [ 39.436820] ? find_held_lock+0x2c/0x110 [ 39.437339] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.437911] ? lock_is_held_type+0x9f/0x120 [ 39.438462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.439067] ? mtree_range_walk+0x632/0x900 [ 39.439619] ? mas_walk+0x5c7/0x7c0 [ 39.440095] do_vmi_munmap+0x1f1/0x2b0 [ 39.440583] mmap_region+0x1f9/0x2660 [ 39.441060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.441596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.442315] ? __pfx_lock_acquire+0x10/0x10 [ 39.442841] ? __pfx_mmap_region+0x10/0x10 [ 39.443368] ? security_mmap_addr+0x7d/0xa0 [ 39.443894] ? get_unmapped_area+0x1f5/0x3f0 [ 39.444451] do_mmap+0x854/0xf00 [ 39.444885] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.445377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.445964] ksys_mmap_pgoff+0x3af/0x500 [ 39.446487] do_syscall_64+0x3f/0x90 [ 39.446964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.447614] RIP: 0033:0x7f0642408d82 [ 39.448071] 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 [ 39.450221] RSP: 002b:00007ffcbd6aaea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.451124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0642408d82 [ 39.451969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0641842000 [ 39.452813] RBP: 00007f0641842000 R08: 0000000000000009 R09: 0000000000001000 [ 39.453676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558caa346ec0 [ 39.454521] R13: 00007ffcbd6aaec0 R14: 00007ffcbd6aaef0 R15: 00007ffcbd6ab250 [ 39.455379] [ 39.455674] [ 39.455889] Allocated by task 213: [ 39.456328] kasan_save_stack+0x22/0x50 [ 39.456830] kasan_set_track+0x25/0x30 [ 39.457332] __kasan_slab_alloc+0x59/0x70 [ 39.457871] kmem_cache_alloc+0x16b/0x370 [ 39.458403] vm_area_dup+0x20/0x160 [ 39.458854] __split_vma+0x170/0x950 [ 39.459323] split_vma+0xc6/0x110 [ 39.459772] mprotect_fixup+0x8d2/0xb30 [ 39.460271] do_mprotect_pkey+0x87e/0xd40 [ 39.460794] __x64_sys_mprotect+0x78/0xc0 [ 39.461320] do_syscall_64+0x3f/0x90 [ 39.461813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.462464] [ 39.462680] Freed by task 13: [ 39.463066] kasan_save_stack+0x22/0x50 [ 39.463581] kasan_set_track+0x25/0x30 [ 39.464080] kasan_save_free_info+0x2b/0x50 [ 39.464616] __kasan_slab_free+0x10a/0x190 [ 39.465151] kmem_cache_free+0x10d/0x4d0 [ 39.465680] rcu_core+0x8c8/0x2860 [ 39.466129] __do_softirq+0x1b7/0x7d4 [ 39.466608] [ 39.466827] Last potentially related work creation: [ 39.467436] kasan_save_stack+0x22/0x50 [ 39.467954] __kasan_record_aux_stack+0x8e/0xa0 [ 39.468532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.469174] remove_vma+0x139/0x170 [ 39.469635] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.470249] do_vmi_munmap+0x1f1/0x2b0 [ 39.470732] __vm_munmap+0x138/0x3a0 [ 39.471196] __x64_sys_munmap+0x59/0x80 [ 39.471699] do_syscall_64+0x3f/0x90 [ 39.472173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.472830] [ 39.473044] The buggy address belongs to the object at ffff888019d690e8 [ 39.473044] which belongs to the cache vm_area_struct of size 168 [ 39.474524] The buggy address is located 88 bytes inside of [ 39.474524] freed 168-byte region [ffff888019d690e8, ffff888019d69190) [ 39.475906] [ 39.476121] The buggy address belongs to the physical page: [ 39.476781] page:0000000083d01af8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d69 [ 39.477880] memcg:ffff88800e75e001 [ 39.478300] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.478992] page_type: 0xffffffff() [ 39.479438] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.480347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e75e001 [ 39.481251] page dumped because: kasan: bad access detected [ 39.481922] [ 39.482135] Memory state around the buggy address: [ 39.482715] ffff888019d69000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.483572] ffff888019d69080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.484431] >ffff888019d69100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.485273] ^ [ 39.485938] ffff888019d69180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.486788] ffff888019d69200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.487635] ================================================================== [ 39.488649] Disabling lock debugging due to kernel taint [ 41.480243] BUG: Bad rss-counter state mm:0000000064da00df type:MM_FILEPAGES val:33 [ 41.481222] BUG: Bad rss-counter state mm:0000000064da00df type:MM_ANONPAGES val:22 [ 41.936907] BUG: Bad rss-counter state mm:000000003fb39808 type:MM_FILEPAGES val:33 [ 41.938083] BUG: Bad rss-counter state mm:000000003fb39808 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20782' (ECDSA) to the list of known hosts. 2023/06/19 11:22:13 fuzzer started 2023/06/19 11:22:14 dialing manager at localhost:44161 2023/06/19 11:22:14 checking machine... 2023/06/19 11:22:14 checking revisions... [ 42.556774] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:22:14 testing simple program... [ 42.605804] cgroup: Unknown subsys name 'net' [ 42.651143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:04 Registers: info registers vcpu 0 RAX=00007ffec19ed0f0 RBX=00007ffec195af60 RCX=00000000000125c6 RDX=0000000000000000 RSI=00007ffec195af60 RDI=0000000000000005 RBP=00007ffec195af00 RSP=00007ffec195aed0 R8 =0000000000000000 R9 =00007ffec19ed080 R10=00007ffec195ae06 R11=0000000000000000 R12=00007ffec195af60 R13=00007ffec195b040 R14=0000000000000002 R15=0000558b673a68b0 RIP=00007ffec19f1a7d RFL=00000206 [-----P-] 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 00007f14c59e0900 00000000 00000000 GS =0000 0000000000000000 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=00007f14c5f95650 CR3=000000000f082000 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=25252525252525252525252525252525 XMM01=0000ff00ff0000ff0000ff0000ffff00 XMM02=00000000ff000000000000000000ff00 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=5d64255b00205425206525206825003e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018687918 RCX=ffffffff81f3a55e RDX=ffff88800d843680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888008e1c0d8 RSP=ffff8880186877e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0030733a745f6c65 R12=0000000000000000 R13=ffff888018687928 R14=ffff888008e1c0ec R15=000000000000001e RIP=ffffffff814c07e4 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 00007f24393a0700 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=00007f84bff8ae20 CR3=000000000eb80000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033313a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363738 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000