syzkaller login: [ 31.627150] BUG: Bad rss-counter state mm:00000000731aa4f4 type:MM_FILEPAGES val:33 [ 31.628231] BUG: Bad rss-counter state mm:00000000731aa4f4 type:MM_ANONPAGES val:22 [ 31.794969] ================================================================== [ 31.795935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.796961] Read of size 8 at addr ffff88800f5f55c8 by task sshd/220 [ 31.797824] [ 31.798212] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.799133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.800174] Call Trace: [ 31.800547] [ 31.800854] dump_stack_lvl+0x91/0xf0 [ 31.801379] print_report+0xcc/0x620 [ 31.801896] ? __virt_addr_valid+0x102/0x340 [ 31.802503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.803156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.803822] kasan_report+0xbe/0xf0 [ 31.804336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.805004] vma_interval_tree_remove+0xc75/0xec0 [ 31.805681] vma_prepare+0xc54/0x11a0 [ 31.806185] __split_vma+0x5af/0x950 [ 31.806685] ? __pfx___split_vma+0x10/0x10 [ 31.807262] ? find_held_lock+0x2c/0x110 [ 31.807823] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.808428] ? lock_is_held_type+0x9f/0x120 [ 31.809007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.809668] ? mtree_range_walk+0x632/0x900 [ 31.810253] ? mas_walk+0x5c7/0x7c0 [ 31.810749] do_vmi_munmap+0x1f1/0x2b0 [ 31.811286] mmap_region+0x1f9/0x2660 [ 31.811795] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.812362] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.813132] ? __pfx_lock_acquire+0x10/0x10 [ 31.813708] ? __pfx_mmap_region+0x10/0x10 [ 31.814276] ? security_mmap_addr+0x7d/0xa0 [ 31.814850] ? get_unmapped_area+0x1f5/0x3f0 [ 31.815451] do_mmap+0x854/0xf00 [ 31.815926] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.816457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.817067] ksys_mmap_pgoff+0x3af/0x500 [ 31.817632] do_syscall_64+0x3f/0x90 [ 31.818139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818824] RIP: 0033:0x7fdc434ebd82 [ 31.819318] 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 [ 31.821578] RSP: 002b:00007ffe9982af88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.822542] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc434ebd82 [ 31.823449] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc42925000 [ 31.824355] RBP: 00007fdc42925000 R08: 0000000000000009 R09: 0000000000001000 [ 31.825251] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8cd745ec0 [ 31.826145] R13: 00007ffe9982afa0 R14: 00007ffe9982afd0 R15: 00007ffe9982b330 [ 31.827058] [ 31.827371] [ 31.827597] Allocated by task 213: [ 31.828051] kasan_save_stack+0x22/0x50 [ 31.828584] kasan_set_track+0x25/0x30 [ 31.829112] __kasan_slab_alloc+0x59/0x70 [ 31.829696] kmem_cache_alloc+0x16b/0x370 [ 31.830238] vm_area_dup+0x20/0x160 [ 31.830723] __split_vma+0x170/0x950 [ 31.831219] split_vma+0xc6/0x110 [ 31.831683] mprotect_fixup+0x8d2/0xb30 [ 31.832226] do_mprotect_pkey+0x87e/0xd40 [ 31.832777] __x64_sys_mprotect+0x78/0xc0 [ 31.833341] do_syscall_64+0x3f/0x90 [ 31.833848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.834536] [ 31.834767] Freed by task 213: [ 31.835197] kasan_save_stack+0x22/0x50 [ 31.835734] kasan_set_track+0x25/0x30 [ 31.836269] kasan_save_free_info+0x2b/0x50 [ 31.836840] __kasan_slab_free+0x10a/0x190 [ 31.837456] kmem_cache_free+0x10d/0x4d0 [ 31.838001] rcu_core+0x8c8/0x2860 [ 31.838483] __do_softirq+0x1b7/0x7d4 [ 31.839134] [ 31.839371] Last potentially related work creation: [ 31.839986] kasan_save_stack+0x22/0x50 [ 31.840523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.841124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.841832] remove_vma+0x139/0x170 [ 31.842306] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.842907] do_vmi_munmap+0x1f1/0x2b0 [ 31.843428] __vm_munmap+0x138/0x3a0 [ 31.843931] __x64_sys_munmap+0x59/0x80 [ 31.844463] do_syscall_64+0x3f/0x90 [ 31.844970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.845671] [ 31.845910] The buggy address belongs to the object at ffff88800f5f5570 [ 31.845910] which belongs to the cache vm_area_struct of size 168 [ 31.847445] The buggy address is located 88 bytes inside of [ 31.847445] freed 168-byte region [ffff88800f5f5570, ffff88800f5f5618) [ 31.848935] [ 31.849174] The buggy address belongs to the physical page: [ 31.849885] page:00000000165c5696 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800f5f59f8 pfn:0xf5f5 [ 31.851197] memcg:ffff8880198f4801 [ 31.851650] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.852331] page_type: 0xffffffff() [ 31.852827] raw: 0100000000000200 ffff88800879fc80 ffffea0000387f10 ffffea00004be950 [ 31.853824] raw: ffff88800f5f59f8 000000000011000c 00000001ffffffff ffff8880198f4801 [ 31.854789] page dumped because: kasan: bad access detected [ 31.855488] [ 31.855725] Memory state around the buggy address: [ 31.856333] ffff88800f5f5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.857244] ffff88800f5f5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.858180] >ffff88800f5f5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.859089] ^ [ 31.859803] ffff88800f5f5600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.860701] ffff88800f5f5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.861618] ================================================================== [ 31.862788] Disabling lock debugging due to kernel taint [ 34.625693] BUG: Bad rss-counter state mm:000000004657835a type:MM_FILEPAGES val:33 [ 34.626878] BUG: Bad rss-counter state mm:000000004657835a type:MM_ANONPAGES val:22 [ 35.113436] BUG: Bad rss-counter state mm:000000005322a158 type:MM_FILEPAGES val:33 [ 35.114654] BUG: Bad rss-counter state mm:000000005322a158 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18123' (ECDSA) to the list of known hosts. 2023/06/19 21:46:38 fuzzer started 2023/06/19 21:46:39 dialing manager at localhost:44161 2023/06/19 21:46:39 checking machine... 2023/06/19 21:46:39 checking revisions... [ 35.780525] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:46:39 testing simple program... [ 35.833934] cgroup: Unknown subsys name 'net' [ 35.874411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:46:38 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=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=00005574f4ad2fe0 CR3=0000000014366000 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=2038333a36343a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a36343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff8880100e8850 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880100e8854 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000202 R13=ffff8880100e8890 R14=ffffffff813782a8 R15=ffff888016e805c0 RIP=ffffffff812e004a 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 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=00007fe5256feee0 CR3=000000001364a000 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=ba1e2aad9c96b7988746bb0721e32dc2 XMM02=ec2efd57dc4c00df000000000011f008 XMM03=22104003c9792bbb000000000011f0d8 XMM04=52d17d0f4968084400000000000ae988 XMM05=e4cb8bb95a7664b600000000001355a0 XMM06=c291bd5c70af25b90000000000135428 XMM07=e042d86d42eb936e0000000000125c18 XMM08=22104003c9792bbb000000000011f0d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000