syzkaller login: [ 30.613297] BUG: Bad rss-counter state mm:000000000f886037 type:MM_FILEPAGES val:33 [ 30.614508] BUG: Bad rss-counter state mm:000000000f886037 type:MM_ANONPAGES val:22 [ 30.654318] ================================================================== [ 30.655566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.656689] Read of size 8 at addr ffff88800dd61d08 by task sshd/219 [ 30.657604] [ 30.657856] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.658880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.660030] Call Trace: [ 30.660398] [ 30.660732] dump_stack_lvl+0x91/0xf0 [ 30.661311] print_report+0xcc/0x620 [ 30.661897] ? __virt_addr_valid+0x102/0x340 [ 30.662557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664023] kasan_report+0xbe/0xf0 [ 30.664572] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.665298] vma_interval_tree_remove+0xc75/0xec0 [ 30.665992] vma_prepare+0xc54/0x11a0 [ 30.666585] __split_vma+0x5af/0x950 [ 30.667158] ? __pfx___split_vma+0x10/0x10 [ 30.667802] ? find_held_lock+0x2c/0x110 [ 30.668422] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.669101] ? lock_is_held_type+0x9f/0x120 [ 30.669737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.670477] ? mtree_range_walk+0x632/0x900 [ 30.671140] ? mas_walk+0x5c7/0x7c0 [ 30.671700] do_vmi_munmap+0x1f1/0x2b0 [ 30.672290] mmap_region+0x1f9/0x2660 [ 30.672872] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.673495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.674371] ? __pfx_lock_acquire+0x10/0x10 [ 30.675009] ? __pfx_mmap_region+0x10/0x10 [ 30.675637] ? security_mmap_addr+0x7d/0xa0 [ 30.676266] ? get_unmapped_area+0x1f5/0x3f0 [ 30.676925] do_mmap+0x854/0xf00 [ 30.677423] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.678015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.678716] ksys_mmap_pgoff+0x3af/0x500 [ 30.679316] do_syscall_64+0x3f/0x90 [ 30.679887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.680803] RIP: 0033:0x7f077ca19d82 [ 30.681350] 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 [ 30.683942] RSP: 002b:00007ffc03b48df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.685027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f077ca19d82 [ 30.686041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f077be53000 [ 30.687096] RBP: 00007f077be53000 R08: 0000000000000009 R09: 0000000000001000 [ 30.688084] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558aa0554ec0 [ 30.689094] R13: 00007ffc03b48e10 R14: 00007ffc03b48e40 R15: 00007ffc03b491a0 [ 30.690121] [ 30.690465] [ 30.690721] Allocated by task 212: [ 30.691230] kasan_save_stack+0x22/0x50 [ 30.691839] kasan_set_track+0x25/0x30 [ 30.692416] __kasan_slab_alloc+0x59/0x70 [ 30.693047] kmem_cache_alloc+0x16b/0x370 [ 30.693668] vm_area_dup+0x20/0x160 [ 30.694229] __split_vma+0x170/0x950 [ 30.694783] split_vma+0xc6/0x110 [ 30.695316] mprotect_fixup+0x8d2/0xb30 [ 30.695908] do_mprotect_pkey+0x87e/0xd40 [ 30.696539] __x64_sys_mprotect+0x78/0xc0 [ 30.697162] do_syscall_64+0x3f/0x90 [ 30.697727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.698514] [ 30.698772] Freed by task 212: [ 30.699233] kasan_save_stack+0x22/0x50 [ 30.699811] kasan_set_track+0x25/0x30 [ 30.700370] kasan_save_free_info+0x2b/0x50 [ 30.701005] __kasan_slab_free+0x10a/0x190 [ 30.701640] kmem_cache_free+0x10d/0x4d0 [ 30.702264] rcu_core+0x8c8/0x2860 [ 30.702793] __do_softirq+0x1b7/0x7d4 [ 30.703349] [ 30.703607] Last potentially related work creation: [ 30.704322] kasan_save_stack+0x22/0x50 [ 30.704927] __kasan_record_aux_stack+0x8e/0xa0 [ 30.705607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.706398] remove_vma+0x139/0x170 [ 30.706925] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.707570] do_vmi_munmap+0x1f1/0x2b0 [ 30.708135] __vm_munmap+0x138/0x3a0 [ 30.708680] __x64_sys_munmap+0x59/0x80 [ 30.709257] do_syscall_64+0x3f/0x90 [ 30.709802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.710539] [ 30.710791] Second to last potentially related work creation: [ 30.711576] kasan_save_stack+0x22/0x50 [ 30.712149] __kasan_record_aux_stack+0x8e/0xa0 [ 30.712811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.713546] remove_vma+0x139/0x170 [ 30.714061] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.714729] do_vmi_munmap+0x1f1/0x2b0 [ 30.715287] mmap_region+0x1f9/0x2660 [ 30.715835] do_mmap+0x854/0xf00 [ 30.716330] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.716892] ksys_mmap_pgoff+0x7d/0x500 [ 30.717462] do_syscall_64+0x3f/0x90 [ 30.718003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718738] [ 30.718985] The buggy address belongs to the object at ffff88800dd61cb0 [ 30.718985] which belongs to the cache vm_area_struct of size 168 [ 30.720678] The buggy address is located 88 bytes inside of [ 30.720678] freed 168-byte region [ffff88800dd61cb0, ffff88800dd61d58) [ 30.722282] [ 30.722536] The buggy address belongs to the physical page: [ 30.723295] page:000000001eb5c87f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd61 [ 30.724543] memcg:ffff88800de2d801 [ 30.725028] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.725816] page_type: 0xffffffff() [ 30.726345] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.727412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de2d801 [ 30.728452] page dumped because: kasan: bad access detected [ 30.729213] [ 30.729458] Memory state around the buggy address: [ 30.730134] ffff88800dd61c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.731114] ffff88800dd61c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.732098] >ffff88800dd61d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.733078] ^ [ 30.733581] ffff88800dd61d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.734577] ffff88800dd61e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.735548] ================================================================== [ 30.737187] Disabling lock debugging due to kernel taint [ 32.456499] BUG: Bad rss-counter state mm:00000000eebd1bad type:MM_FILEPAGES val:33 [ 32.457270] BUG: Bad rss-counter state mm:00000000eebd1bad type:MM_ANONPAGES val:22 [ 32.816324] BUG: Bad rss-counter state mm:00000000d7c2a98f type:MM_FILEPAGES val:33 [ 32.817103] BUG: Bad rss-counter state mm:00000000d7c2a98f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13590' (ECDSA) to the list of known hosts. 2023/06/19 18:49:36 fuzzer started 2023/06/19 18:49:37 dialing manager at localhost:44161 2023/06/19 18:49:37 checking machine... 2023/06/19 18:49:37 checking revisions... [ 33.510008] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:49:37 testing simple program... [ 33.563527] cgroup: Unknown subsys name 'net' [ 33.606164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:49:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7fa40 RCX=ffffffff860d6801 RDX=1ffff110011aff56 RSI=ffffffff8180c522 RDI=ffff888008d7fa4c RBP=ffff888008d7fab0 RSP=ffff888008d7f958 R8 =ffffffff860d68fa R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff8880187c7c60 RIP=ffffffff813ad4f7 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 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=00007f6f24b2b008 CR3=000000000c486000 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=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 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=00007fadbfbb3ee0 CR3=000000000c4ce000 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=29c346a7c3f712ac654368da2db28521 XMM02=ec2efd57dc4c00df000000000011d768 XMM03=7c61f8c26281c605000000000011d838 XMM04=246efa710560553f00000000000ae988 XMM05=dfcdbad4f1609c370000000000135168 XMM06=4406e7dd5f2fe3180000000000134340 XMM07=e042d86d42eb936e0000000000124800 XMM08=7c61f8c26281c605000000000011d838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000