syzkaller login: [ 37.218710] BUG: Bad rss-counter state mm:00000000930d4cb9 type:MM_FILEPAGES val:33 [ 37.220183] BUG: Bad rss-counter state mm:00000000930d4cb9 type:MM_ANONPAGES val:22 [ 37.258119] ================================================================== [ 37.259266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.260411] Read of size 8 at addr ffff88800e1fed08 by task sshd/220 [ 37.261343] [ 37.261600] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.262608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.263541] Call Trace: [ 37.263840] [ 37.264108] dump_stack_lvl+0x91/0xf0 [ 37.264573] print_report+0xcc/0x620 [ 37.265031] ? __virt_addr_valid+0x102/0x340 [ 37.265563] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.266139] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.266746] kasan_report+0xbe/0xf0 [ 37.267202] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.267788] vma_interval_tree_remove+0xc75/0xec0 [ 37.268360] vma_prepare+0xc54/0x11a0 [ 37.268817] __split_vma+0x5af/0x950 [ 37.269263] ? __pfx___split_vma+0x10/0x10 [ 37.269772] ? find_held_lock+0x2c/0x110 [ 37.270262] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.270802] ? lock_is_held_type+0x9f/0x120 [ 37.271310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.271883] ? mtree_range_walk+0x632/0x900 [ 37.272402] ? mas_walk+0x5c7/0x7c0 [ 37.272956] do_vmi_munmap+0x1f1/0x2b0 [ 37.273536] mmap_region+0x1f9/0x2660 [ 37.274100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.274709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.275549] ? __pfx_lock_acquire+0x10/0x10 [ 37.276176] ? __pfx_mmap_region+0x10/0x10 [ 37.276804] ? security_mmap_addr+0x7d/0xa0 [ 37.277430] ? get_unmapped_area+0x1f5/0x3f0 [ 37.278076] do_mmap+0x854/0xf00 [ 37.278591] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.279197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.279860] ksys_mmap_pgoff+0x3af/0x500 [ 37.280459] do_syscall_64+0x3f/0x90 [ 37.281019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.281780] RIP: 0033:0x7f393b09ad82 [ 37.282320] 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 [ 37.284844] RSP: 002b:00007ffe638637e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.285919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f393b09ad82 [ 37.286946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f393a4d4000 [ 37.287947] RBP: 00007f393a4d4000 R08: 0000000000000009 R09: 0000000000001000 [ 37.288952] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ea5028ec0 [ 37.289952] R13: 00007ffe63863800 R14: 00007ffe63863830 R15: 00007ffe63863b90 [ 37.290972] [ 37.291314] [ 37.291565] Allocated by task 213: [ 37.292071] kasan_save_stack+0x22/0x50 [ 37.292665] kasan_set_track+0x25/0x30 [ 37.293246] __kasan_slab_alloc+0x59/0x70 [ 37.293862] kmem_cache_alloc+0x16b/0x370 [ 37.294470] vm_area_dup+0x20/0x160 [ 37.295009] __split_vma+0x170/0x950 [ 37.295558] split_vma+0xc6/0x110 [ 37.296073] mprotect_fixup+0x8d2/0xb30 [ 37.296659] do_mprotect_pkey+0x87e/0xd40 [ 37.297270] __x64_sys_mprotect+0x78/0xc0 [ 37.297882] do_syscall_64+0x3f/0x90 [ 37.298468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.299306] [ 37.299537] Freed by task 213: [ 37.299955] kasan_save_stack+0x22/0x50 [ 37.300492] kasan_set_track+0x25/0x30 [ 37.301014] kasan_save_free_info+0x2b/0x50 [ 37.301588] __kasan_slab_free+0x10a/0x190 [ 37.302292] kmem_cache_free+0x10d/0x4d0 [ 37.302897] rcu_core+0x8c8/0x2860 [ 37.303394] __do_softirq+0x1b7/0x7d4 [ 37.303927] [ 37.304171] Last potentially related work creation: [ 37.304818] kasan_save_stack+0x22/0x50 [ 37.305376] __kasan_record_aux_stack+0x8e/0xa0 [ 37.306012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.306784] remove_vma+0x139/0x170 [ 37.307301] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.307935] do_vmi_munmap+0x1f1/0x2b0 [ 37.308488] __vm_munmap+0x138/0x3a0 [ 37.309016] __x64_sys_munmap+0x59/0x80 [ 37.309581] do_syscall_64+0x3f/0x90 [ 37.310107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.310844] [ 37.311088] The buggy address belongs to the object at ffff88800e1fecb0 [ 37.311088] which belongs to the cache vm_area_struct of size 168 [ 37.312589] The buggy address is located 88 bytes inside of [ 37.312589] freed 168-byte region [ffff88800e1fecb0, ffff88800e1fed58) [ 37.313974] [ 37.314186] The buggy address belongs to the physical page: [ 37.314850] page:00000000c0c5d0a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1fe [ 37.315922] memcg:ffff88800e651801 [ 37.316344] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.316984] page_type: 0xffffffff() [ 37.317431] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.318341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e651801 [ 37.319262] page dumped because: kasan: bad access detected [ 37.319915] [ 37.320128] Memory state around the buggy address: [ 37.320700] ffff88800e1fec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.321584] ffff88800e1fec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.322470] >ffff88800e1fed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.323318] ^ [ 37.323750] ffff88800e1fed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.324592] ffff88800e1fee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.325431] ================================================================== [ 37.326554] Disabling lock debugging due to kernel taint [ 39.235636] BUG: Bad rss-counter state mm:00000000f0e14046 type:MM_FILEPAGES val:33 [ 39.236566] BUG: Bad rss-counter state mm:00000000f0e14046 type:MM_ANONPAGES val:22 [ 39.713345] BUG: Bad rss-counter state mm:000000004d468e10 type:MM_FILEPAGES val:33 [ 39.714654] BUG: Bad rss-counter state mm:000000004d468e10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10576' (ECDSA) to the list of known hosts. 2023/06/19 17:54:45 fuzzer started 2023/06/19 17:54:45 dialing manager at localhost:44161 2023/06/19 17:54:45 checking machine... 2023/06/19 17:54:45 checking revisions... [ 40.433232] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:54:46 testing simple program... [ 40.484842] cgroup: Unknown subsys name 'net' [ 40.539789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:54:39 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=ffff888008c58000 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=00007f2f9a21d0b0 CR3=000000001707a000 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=34353a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303335 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110039b1f09 RSI=ffffffff8180ae86 RDI=ffff88801cd8f7e8 RBP=ffff88801cd8f840 RSP=ffff88801cd8f778 R8 =0000000000000001 R9 =ffff88801cd8f828 R10=0000000000038001 R11=0000000000021edf R12=ffff88801cd8f848 R13=ffff88801cd8f830 R14=ffff888016be0000 R15=ffff88801cd8f7e8 RIP=ffffffff81130682 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 00007f2f99c65900 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=00007fffed385000 CR3=000000000c586000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000