syzkaller login: [ 30.208045] BUG: Bad rss-counter state mm:0000000061133969 type:MM_FILEPAGES val:33 [ 30.209261] BUG: Bad rss-counter state mm:0000000061133969 type:MM_ANONPAGES val:22 [ 30.379502] ================================================================== [ 30.380644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.381902] Read of size 8 at addr ffff888015b7aed8 by task sshd/220 [ 30.382828] [ 30.383111] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.384168] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.385178] Call Trace: [ 30.385515] [ 30.385798] dump_stack_lvl+0x91/0xf0 [ 30.386307] print_report+0xcc/0x620 [ 30.386796] ? __virt_addr_valid+0x102/0x340 [ 30.387362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.387985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388644] kasan_report+0xbe/0xf0 [ 30.389133] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.389752] vma_interval_tree_remove+0xc75/0xec0 [ 30.390373] vma_prepare+0xc54/0x11a0 [ 30.390863] __split_vma+0x5af/0x950 [ 30.391353] ? __pfx___split_vma+0x10/0x10 [ 30.391887] ? find_held_lock+0x2c/0x110 [ 30.392459] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.393045] ? lock_is_held_type+0x9f/0x120 [ 30.393595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.394216] ? mtree_range_walk+0x632/0x900 [ 30.394774] ? mas_walk+0x5c7/0x7c0 [ 30.395262] do_vmi_munmap+0x1f1/0x2b0 [ 30.395752] mmap_region+0x1f9/0x2660 [ 30.396265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.396796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.397538] ? __pfx_lock_acquire+0x10/0x10 [ 30.398088] ? __pfx_mmap_region+0x10/0x10 [ 30.398622] ? security_mmap_addr+0x7d/0xa0 [ 30.399167] ? get_unmapped_area+0x1f5/0x3f0 [ 30.399727] do_mmap+0x854/0xf00 [ 30.400202] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.400728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.401318] ksys_mmap_pgoff+0x3af/0x500 [ 30.401828] do_syscall_64+0x3f/0x90 [ 30.402327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402982] RIP: 0033:0x7fc385bc9d82 [ 30.403454] 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 [ 30.405642] RSP: 002b:00007fff14439f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.406563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc385bc9d82 [ 30.407427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc385003000 [ 30.408300] RBP: 00007fc385003000 R08: 0000000000000009 R09: 0000000000001000 [ 30.409182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e73c9bec0 [ 30.410051] R13: 00007fff14439f70 R14: 00007fff14439fa0 R15: 00007fff1443a300 [ 30.410926] [ 30.411237] [ 30.411454] Allocated by task 213: [ 30.412026] kasan_save_stack+0x22/0x50 [ 30.412735] kasan_set_track+0x25/0x30 [ 30.413410] __kasan_slab_alloc+0x59/0x70 [ 30.414117] kmem_cache_alloc+0x16b/0x370 [ 30.414743] vm_area_dup+0x20/0x160 [ 30.415241] __split_vma+0x170/0x950 [ 30.415715] split_vma+0xc6/0x110 [ 30.416214] mprotect_fixup+0x8d2/0xb30 [ 30.416739] do_mprotect_pkey+0x87e/0xd40 [ 30.417277] __x64_sys_mprotect+0x78/0xc0 [ 30.417805] do_syscall_64+0x3f/0x90 [ 30.418299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.418948] [ 30.419209] Freed by task 213: [ 30.419609] kasan_save_stack+0x22/0x50 [ 30.420130] kasan_set_track+0x25/0x30 [ 30.420632] kasan_save_free_info+0x2b/0x50 [ 30.421180] __kasan_slab_free+0x10a/0x190 [ 30.421719] kmem_cache_free+0x10d/0x4d0 [ 30.422321] rcu_core+0x8c8/0x2860 [ 30.422766] __do_softirq+0x1b7/0x7d4 [ 30.423279] [ 30.423499] Last potentially related work creation: [ 30.424098] kasan_save_stack+0x22/0x50 [ 30.424620] __kasan_record_aux_stack+0x8e/0xa0 [ 30.425213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.425864] remove_vma+0x139/0x170 [ 30.426328] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.426891] do_vmi_munmap+0x1f1/0x2b0 [ 30.427411] __vm_munmap+0x138/0x3a0 [ 30.427888] __x64_sys_munmap+0x59/0x80 [ 30.428399] do_syscall_64+0x3f/0x90 [ 30.428888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.429546] [ 30.429765] The buggy address belongs to the object at ffff888015b7ae80 [ 30.429765] which belongs to the cache vm_area_struct of size 168 [ 30.431298] The buggy address is located 88 bytes inside of [ 30.431298] freed 168-byte region [ffff888015b7ae80, ffff888015b7af28) [ 30.432754] [ 30.432978] The buggy address belongs to the physical page: [ 30.433649] page:00000000e9092d70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b7a [ 30.434794] memcg:ffff8880181eee01 [ 30.435272] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.435931] page_type: 0xffffffff() [ 30.436408] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.437367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181eee01 [ 30.438313] page dumped because: kasan: bad access detected [ 30.438994] [ 30.439233] Memory state around the buggy address: [ 30.439812] ffff888015b7ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.440701] ffff888015b7ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.441585] >ffff888015b7ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.442469] ^ [ 30.443220] ffff888015b7af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.444093] ffff888015b7af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.444964] ================================================================== [ 30.445889] Disabling lock debugging due to kernel taint [ 32.127210] BUG: Bad rss-counter state mm:0000000077533f81 type:MM_FILEPAGES val:33 [ 32.128182] BUG: Bad rss-counter state mm:0000000077533f81 type:MM_ANONPAGES val:22 [ 32.541600] BUG: Bad rss-counter state mm:00000000fd432f8f type:MM_FILEPAGES val:33 [ 32.542367] BUG: Bad rss-counter state mm:00000000fd432f8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58969' (ECDSA) to the list of known hosts. 2023/06/20 16:41:21 fuzzer started 2023/06/20 16:41:21 dialing manager at localhost:36067 2023/06/20 16:41:21 checking machine... 2023/06/20 16:41:21 checking revisions... [ 33.156981] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:41:22 testing simple program... [ 33.193513] cgroup: Unknown subsys name 'net' [ 33.226321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc148053e8 CR3=000000000f746000 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=2031323a31343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a31343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000015 RCX=00007fff852e0a80 RDX=000000000000001e RSI=0000000000000000 RDI=00007fff852e0a6a RBP=00007fff852e0b20 RSP=00007fff852e0a40 R8 =0000000000000015 R9 =00007fff852e0c90 R10=0000000000000025 R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000015 R15=00007fff852e0a40 RIP=00007efe1ec9ad35 RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efe1e10d900 00000000 00000000 GS =0000 0000000000000000 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=0000561b04ec2380 CR3=000000001459a000 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=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