syzkaller login: [ 49.625535] BUG: Bad rss-counter state mm:00000000e626d5ba type:MM_FILEPAGES val:33 [ 49.626779] BUG: Bad rss-counter state mm:00000000e626d5ba type:MM_ANONPAGES val:22 [ 49.807811] ================================================================== [ 49.808767] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.809713] Read of size 8 at addr ffff888006810310 by task sshd/220 [ 49.810485] [ 49.810705] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.811694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.812716] Call Trace: [ 49.813039] [ 49.813351] dump_stack_lvl+0x91/0xf0 [ 49.813845] print_report+0xcc/0x620 [ 49.814337] ? __virt_addr_valid+0x102/0x340 [ 49.814881] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.815499] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.816150] kasan_report+0xbe/0xf0 [ 49.816627] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.817250] vma_interval_tree_remove+0xc75/0xec0 [ 49.817845] vma_prepare+0xc54/0x11a0 [ 49.818321] __split_vma+0x5af/0x950 [ 49.818799] ? __pfx___split_vma+0x10/0x10 [ 49.819328] ? find_held_lock+0x2c/0x110 [ 49.819852] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.820459] ? lock_is_held_type+0x9f/0x120 [ 49.821019] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.821652] ? mtree_range_walk+0x632/0x900 [ 49.822217] ? mas_walk+0x5c7/0x7c0 [ 49.822703] do_vmi_munmap+0x1f1/0x2b0 [ 49.823201] mmap_region+0x1f9/0x2660 [ 49.823682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.824200] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.824925] ? __pfx_lock_acquire+0x10/0x10 [ 49.825461] ? __pfx_mmap_region+0x10/0x10 [ 49.825995] ? security_mmap_addr+0x7d/0xa0 [ 49.826521] ? get_unmapped_area+0x1f5/0x3f0 [ 49.827070] do_mmap+0x854/0xf00 [ 49.827514] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.828026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.828589] ksys_mmap_pgoff+0x3af/0x500 [ 49.829098] do_syscall_64+0x3f/0x90 [ 49.829582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.830235] RIP: 0033:0x7f609334cd82 [ 49.830689] 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 [ 49.832814] RSP: 002b:00007ffc4f24c228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.833717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f609334cd82 [ 49.834558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6092786000 [ 49.835402] RBP: 00007f6092786000 R08: 0000000000000009 R09: 0000000000001000 [ 49.836257] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f17b76ec0 [ 49.837101] R13: 00007ffc4f24c240 R14: 00007ffc4f24c270 R15: 00007ffc4f24c5d0 [ 49.837956] [ 49.838251] [ 49.838467] Allocated by task 213: [ 49.838889] kasan_save_stack+0x22/0x50 [ 49.839391] kasan_set_track+0x25/0x30 [ 49.839884] __kasan_slab_alloc+0x59/0x70 [ 49.840410] kmem_cache_alloc+0x16b/0x370 [ 49.840928] vm_area_dup+0x20/0x160 [ 49.841387] __split_vma+0x170/0x950 [ 49.841858] split_vma+0xc6/0x110 [ 49.842301] mprotect_fixup+0x8d2/0xb30 [ 49.842802] do_mprotect_pkey+0x87e/0xd40 [ 49.843325] __x64_sys_mprotect+0x78/0xc0 [ 49.843847] do_syscall_64+0x3f/0x90 [ 49.844337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.844981] [ 49.845197] Freed by task 213: [ 49.845587] kasan_save_stack+0x22/0x50 [ 49.846087] kasan_set_track+0x25/0x30 [ 49.846585] kasan_save_free_info+0x2b/0x50 [ 49.847115] __kasan_slab_free+0x10a/0x190 [ 49.847673] kmem_cache_free+0x10d/0x4d0 [ 49.848188] rcu_core+0x8c8/0x2860 [ 49.848644] __do_softirq+0x1b7/0x7d4 [ 49.849122] [ 49.849339] Last potentially related work creation: [ 49.849925] kasan_save_stack+0x22/0x50 [ 49.850436] __kasan_record_aux_stack+0x8e/0xa0 [ 49.851011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.851673] remove_vma+0x139/0x170 [ 49.852146] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.852705] do_vmi_munmap+0x1f1/0x2b0 [ 49.853193] __vm_munmap+0x138/0x3a0 [ 49.853659] __x64_sys_munmap+0x59/0x80 [ 49.854171] do_syscall_64+0x3f/0x90 [ 49.854651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.855297] [ 49.855517] The buggy address belongs to the object at ffff8880068102b8 [ 49.855517] which belongs to the cache vm_area_struct of size 168 [ 49.857004] The buggy address is located 88 bytes inside of [ 49.857004] freed 168-byte region [ffff8880068102b8, ffff888006810360) [ 49.858396] [ 49.858613] The buggy address belongs to the physical page: [ 49.859272] page:00000000fafb3faa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6810 [ 49.860359] memcg:ffff88800de96401 [ 49.860783] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.861427] page_type: 0xffffffff() [ 49.861878] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.862791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de96401 [ 49.863691] page dumped because: kasan: bad access detected [ 49.864365] [ 49.864577] Memory state around the buggy address: [ 49.865151] ffff888006810200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 49.865993] ffff888006810280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 49.866837] >ffff888006810300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 49.867683] ^ [ 49.868167] ffff888006810380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 49.869012] ffff888006810400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 49.869856] ================================================================== [ 49.871232] Disabling lock debugging due to kernel taint [ 51.891375] BUG: Bad rss-counter state mm:00000000b6215ebd type:MM_FILEPAGES val:33 [ 51.892599] BUG: Bad rss-counter state mm:00000000b6215ebd type:MM_ANONPAGES val:22 [ 52.358218] BUG: Bad rss-counter state mm:000000002b6b06d7 type:MM_FILEPAGES val:33 [ 52.359783] BUG: Bad rss-counter state mm:000000002b6b06d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49869' (ECDSA) to the list of known hosts. 2023/06/20 05:09:05 fuzzer started 2023/06/20 05:09:05 dialing manager at localhost:44161 2023/06/20 05:09:05 checking machine... 2023/06/20 05:09:05 checking revisions... [ 53.108709] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:09:05 testing simple program... [ 53.154926] cgroup: Unknown subsys name 'net' [ 53.209701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff818c23aa RDX=ffff88800de2b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800eb6f950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88800daf1900 R14=0000000000000345 R15=dffffc0000000000 RIP=ffffffff814c01fc 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 00007f080cc18900 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=00007ffd43353000 CR3=000000000e170000 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=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 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=0000000000000001 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=00007f73502d0650 CR3=000000001a8d0000 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=2034303a39303a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a39303a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000