syzkaller login: [ 30.721852] BUG: Bad rss-counter state mm:00000000251f8223 type:MM_FILEPAGES val:33 [ 30.723145] BUG: Bad rss-counter state mm:00000000251f8223 type:MM_ANONPAGES val:22 [ 30.765157] ================================================================== [ 30.766358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767607] Read of size 8 at addr ffff888016226ed8 by task sshd/220 [ 30.768604] [ 30.768897] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.770039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.771183] Call Trace: [ 30.771531] [ 30.771824] dump_stack_lvl+0x91/0xf0 [ 30.772350] print_report+0xcc/0x620 [ 30.772846] ? __virt_addr_valid+0x102/0x340 [ 30.773423] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774075] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774710] kasan_report+0xbe/0xf0 [ 30.775201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775833] vma_interval_tree_remove+0xc75/0xec0 [ 30.776466] vma_prepare+0xc54/0x11a0 [ 30.776951] __split_vma+0x5af/0x950 [ 30.777448] ? __pfx___split_vma+0x10/0x10 [ 30.777975] ? find_held_lock+0x2c/0x110 [ 30.778528] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.779098] ? lock_is_held_type+0x9f/0x120 [ 30.779664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.780298] ? mtree_range_walk+0x632/0x900 [ 30.780867] ? mas_walk+0x5c7/0x7c0 [ 30.781362] do_vmi_munmap+0x1f1/0x2b0 [ 30.781864] mmap_region+0x1f9/0x2660 [ 30.782372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.782890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.783625] ? __pfx_lock_acquire+0x10/0x10 [ 30.784173] ? __pfx_mmap_region+0x10/0x10 [ 30.784734] ? security_mmap_addr+0x7d/0xa0 [ 30.785292] ? get_unmapped_area+0x1f5/0x3f0 [ 30.785846] do_mmap+0x854/0xf00 [ 30.786332] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.786829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.787431] ksys_mmap_pgoff+0x3af/0x500 [ 30.787950] do_syscall_64+0x3f/0x90 [ 30.788458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789107] RIP: 0033:0x7fbd5c11ad82 [ 30.789581] 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 [ 30.791756] RSP: 002b:00007ffc01013598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.792691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd5c11ad82 [ 30.793562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd5b554000 [ 30.794451] RBP: 00007fbd5b554000 R08: 0000000000000009 R09: 0000000000001000 [ 30.795319] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad283aec0 [ 30.796189] R13: 00007ffc010135b0 R14: 00007ffc010135e0 R15: 00007ffc01013940 [ 30.797077] [ 30.797391] [ 30.797609] Allocated by task 213: [ 30.798049] kasan_save_stack+0x22/0x50 [ 30.798585] kasan_set_track+0x25/0x30 [ 30.799082] __kasan_slab_alloc+0x59/0x70 [ 30.799636] kmem_cache_alloc+0x16b/0x370 [ 30.800154] vm_area_dup+0x20/0x160 [ 30.800645] __split_vma+0x170/0x950 [ 30.801111] split_vma+0xc6/0x110 [ 30.801573] mprotect_fixup+0x8d2/0xb30 [ 30.802088] do_mprotect_pkey+0x87e/0xd40 [ 30.802636] __x64_sys_mprotect+0x78/0xc0 [ 30.803164] do_syscall_64+0x3f/0x90 [ 30.803668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804341] [ 30.804559] Freed by task 48: [ 30.804956] kasan_save_stack+0x22/0x50 [ 30.805486] kasan_set_track+0x25/0x30 [ 30.805985] kasan_save_free_info+0x2b/0x50 [ 30.806560] __kasan_slab_free+0x10a/0x190 [ 30.807092] kmem_cache_free+0x10d/0x4d0 [ 30.807622] rcu_core+0x8c8/0x2860 [ 30.808078] __do_softirq+0x1b7/0x7d4 [ 30.808584] [ 30.808803] Last potentially related work creation: [ 30.809398] kasan_save_stack+0x22/0x50 [ 30.809909] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811149] remove_vma+0x139/0x170 [ 30.811614] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812181] do_vmi_munmap+0x1f1/0x2b0 [ 30.812693] __vm_munmap+0x138/0x3a0 [ 30.813159] __x64_sys_munmap+0x59/0x80 [ 30.813683] do_syscall_64+0x3f/0x90 [ 30.814191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814846] [ 30.815062] Second to last potentially related work creation: [ 30.815771] kasan_save_stack+0x22/0x50 [ 30.816305] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.817556] remove_vma+0x139/0x170 [ 30.818039] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.818628] do_vmi_munmap+0x1f1/0x2b0 [ 30.819118] mmap_region+0x1f9/0x2660 [ 30.819618] do_mmap+0x854/0xf00 [ 30.820054] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.820574] ksys_mmap_pgoff+0x3af/0x500 [ 30.821073] do_syscall_64+0x3f/0x90 [ 30.821566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822253] [ 30.822470] The buggy address belongs to the object at ffff888016226e80 [ 30.822470] which belongs to the cache vm_area_struct of size 168 [ 30.823953] The buggy address is located 88 bytes inside of [ 30.823953] freed 168-byte region [ffff888016226e80, ffff888016226f28) [ 30.825403] [ 30.825626] The buggy address belongs to the physical page: [ 30.826323] page:00000000f6766042 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16226 [ 30.827444] memcg:ffff888016885c01 [ 30.827878] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.828557] page_type: 0xffffffff() [ 30.829020] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.829984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016885c01 [ 30.830934] page dumped because: kasan: bad access detected [ 30.831620] [ 30.831837] Memory state around the buggy address: [ 30.832448] ffff888016226d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.833329] ffff888016226e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.834218] >ffff888016226e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.835070] ^ [ 30.835812] ffff888016226f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.836700] ffff888016226f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.837575] ================================================================== [ 30.839345] Disabling lock debugging due to kernel taint [ 32.763608] BUG: Bad rss-counter state mm:00000000e635ad9b type:MM_FILEPAGES val:33 [ 32.764767] BUG: Bad rss-counter state mm:00000000e635ad9b type:MM_ANONPAGES val:22 [ 33.222610] BUG: Bad rss-counter state mm:000000000d2dcf32 type:MM_FILEPAGES val:33 [ 33.223552] BUG: Bad rss-counter state mm:000000000d2dcf32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21631' (ECDSA) to the list of known hosts. 2023/06/21 06:19:29 fuzzer started 2023/06/21 06:19:29 dialing manager at localhost:36067 2023/06/21 06:19:29 checking machine... 2023/06/21 06:19:29 checking revisions... [ 33.961289] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:29 testing simple program... [ 34.009858] cgroup: Unknown subsys name 'net' [ 34.057751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:29 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff1100d9c13a7 RSP=ffff88806ce09d30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000283 R13=ffffea00003bca00 R14=ffffffff8186b835 R15=ffff88800eed1980 RIP=ffffffff812e009a RFL=00000046 [---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 00007fadb6340900 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=00007ffc35b69000 CR3=000000000ea32000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fcf3851ef60 CR3=000000000a9a8000 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=2038323a39313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a39313a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000