syzkaller login: [ 30.494543] BUG: Bad rss-counter state mm:000000001f809274 type:MM_FILEPAGES val:33 [ 30.495991] BUG: Bad rss-counter state mm:000000001f809274 type:MM_ANONPAGES val:22 [ 30.642069] ================================================================== [ 30.642988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.643947] Read of size 8 at addr ffff8880160266b0 by task sshd/220 [ 30.644718] [ 30.644939] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.645910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.646892] Call Trace: [ 30.647260] [ 30.647545] dump_stack_lvl+0x91/0xf0 [ 30.648037] print_report+0xcc/0x620 [ 30.648538] ? __virt_addr_valid+0x102/0x340 [ 30.649094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650351] kasan_report+0xbe/0xf0 [ 30.650837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651481] vma_interval_tree_remove+0xc75/0xec0 [ 30.652084] vma_prepare+0xc54/0x11a0 [ 30.652570] __split_vma+0x5af/0x950 [ 30.653051] ? __pfx___split_vma+0x10/0x10 [ 30.653581] ? find_held_lock+0x2c/0x110 [ 30.654117] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.654688] ? lock_is_held_type+0x9f/0x120 [ 30.655259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.655870] ? mtree_range_walk+0x632/0x900 [ 30.656423] ? mas_walk+0x5c7/0x7c0 [ 30.656911] do_vmi_munmap+0x1f1/0x2b0 [ 30.657408] mmap_region+0x1f9/0x2660 [ 30.657895] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.658414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.659158] ? __pfx_lock_acquire+0x10/0x10 [ 30.659701] ? __pfx_mmap_region+0x10/0x10 [ 30.660232] ? security_mmap_addr+0x7d/0xa0 [ 30.660769] ? get_unmapped_area+0x1f5/0x3f0 [ 30.661323] do_mmap+0x854/0xf00 [ 30.661766] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.662830] ksys_mmap_pgoff+0x3af/0x500 [ 30.663347] do_syscall_64+0x3f/0x90 [ 30.663839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664500] RIP: 0033:0x7fc8e1a22d82 [ 30.664967] 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 [ 30.667129] RSP: 002b:00007ffc61753b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.668047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8e1a22d82 [ 30.668901] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8e0e5c000 [ 30.669759] RBP: 00007fc8e0e5c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.670618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556495152ec0 [ 30.671485] R13: 00007ffc61753b60 R14: 00007ffc61753b90 R15: 00007ffc61753ef0 [ 30.672346] [ 30.672640] [ 30.672856] Allocated by task 213: [ 30.673302] kasan_save_stack+0x22/0x50 [ 30.673821] kasan_set_track+0x25/0x30 [ 30.674329] __kasan_slab_alloc+0x59/0x70 [ 30.674869] kmem_cache_alloc+0x16b/0x370 [ 30.675409] vm_area_dup+0x20/0x160 [ 30.675879] __split_vma+0x170/0x950 [ 30.676351] split_vma+0xc6/0x110 [ 30.676802] mprotect_fixup+0x8d2/0xb30 [ 30.677313] do_mprotect_pkey+0x87e/0xd40 [ 30.677847] __x64_sys_mprotect+0x78/0xc0 [ 30.678378] do_syscall_64+0x3f/0x90 [ 30.678855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679528] [ 30.679745] Freed by task 213: [ 30.680143] kasan_save_stack+0x22/0x50 [ 30.680654] kasan_set_track+0x25/0x30 [ 30.681150] kasan_save_free_info+0x2b/0x50 [ 30.681697] __kasan_slab_free+0x10a/0x190 [ 30.682236] kmem_cache_free+0x10d/0x4d0 [ 30.682747] rcu_core+0x8c8/0x2860 [ 30.683217] __do_softirq+0x1b7/0x7d4 [ 30.683704] [ 30.683920] Last potentially related work creation: [ 30.684506] kasan_save_stack+0x22/0x50 [ 30.685013] __kasan_record_aux_stack+0x8e/0xa0 [ 30.685598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686247] remove_vma+0x139/0x170 [ 30.686706] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687282] do_vmi_munmap+0x1f1/0x2b0 [ 30.687773] __vm_munmap+0x138/0x3a0 [ 30.688241] __x64_sys_munmap+0x59/0x80 [ 30.688738] do_syscall_64+0x3f/0x90 [ 30.689214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689863] [ 30.690079] The buggy address belongs to the object at ffff888016026658 [ 30.690079] which belongs to the cache vm_area_struct of size 168 [ 30.691566] The buggy address is located 88 bytes inside of [ 30.691566] freed 168-byte region [ffff888016026658, ffff888016026700) [ 30.692983] [ 30.693199] The buggy address belongs to the physical page: [ 30.693858] page:0000000097e7198f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16026 [ 30.694963] memcg:ffff88801a189f01 [ 30.695414] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.696064] page_type: 0xffffffff() [ 30.696517] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.697440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a189f01 [ 30.698362] page dumped because: kasan: bad access detected [ 30.699038] [ 30.699258] Memory state around the buggy address: [ 30.699845] ffff888016026580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.700709] ffff888016026600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.701578] >ffff888016026680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.702441] ^ [ 30.703051] ffff888016026700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.703923] ffff888016026780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.704781] ================================================================== [ 30.705764] Disabling lock debugging due to kernel taint [ 32.915341] BUG: Bad rss-counter state mm:000000002e669385 type:MM_FILEPAGES val:33 [ 32.916359] BUG: Bad rss-counter state mm:000000002e669385 type:MM_ANONPAGES val:22 [ 33.398862] BUG: Bad rss-counter state mm:00000000ec1c79e8 type:MM_FILEPAGES val:33 [ 33.399905] BUG: Bad rss-counter state mm:00000000ec1c79e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64811' (ECDSA) to the list of known hosts. 2023/06/21 05:02:58 fuzzer started 2023/06/21 05:02:58 dialing manager at localhost:36067 2023/06/21 05:02:58 checking machine... 2023/06/21 05:02:58 checking revisions... [ 34.102710] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:02:58 testing simple program... [ 34.152912] cgroup: Unknown subsys name 'net' [ 34.200311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff816ecdea RDX=ffff88801839d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff888016207c10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88801827e000 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff814c0860 RFL=00000202 [-------] 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 00007f67263e5900 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=00007ffc9ad5c000 CR3=000000001c942000 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=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 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=00007fef0de40280 CR3=000000001636a000 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=2037353a32303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000