syzkaller login: [ 28.674015] BUG: Bad rss-counter state mm:00000000b7b08883 type:MM_FILEPAGES val:33 [ 28.675390] BUG: Bad rss-counter state mm:00000000b7b08883 type:MM_ANONPAGES val:22 [ 28.843463] ================================================================== [ 28.844642] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.845530] Read of size 8 at addr ffff88800ebe8058 by task sshd/221 [ 28.846319] [ 28.846527] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.847512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.848506] Call Trace: [ 28.848823] [ 28.849106] dump_stack_lvl+0x91/0xf0 [ 28.849577] print_report+0xcc/0x620 [ 28.850035] ? __virt_addr_valid+0x102/0x340 [ 28.850556] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.851139] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.851724] kasan_report+0xbe/0xf0 [ 28.852199] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.852786] vma_interval_tree_remove+0xc75/0xec0 [ 28.853376] vma_prepare+0xc54/0x11a0 [ 28.853837] __split_vma+0x5af/0x950 [ 28.854292] ? __pfx___split_vma+0x10/0x10 [ 28.854800] ? find_held_lock+0x2c/0x110 [ 28.855308] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.855867] ? lock_is_held_type+0x9f/0x120 [ 28.856470] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.857096] ? mtree_range_walk+0x632/0x900 [ 28.857639] ? mas_walk+0x5c7/0x7c0 [ 28.858148] do_vmi_munmap+0x1f1/0x2b0 [ 28.858638] mmap_region+0x1f9/0x2660 [ 28.859107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.859603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.860318] ? __pfx_lock_acquire+0x10/0x10 [ 28.860824] ? __pfx_mmap_region+0x10/0x10 [ 28.861331] ? security_mmap_addr+0x7d/0xa0 [ 28.861835] ? get_unmapped_area+0x1f5/0x3f0 [ 28.862355] do_mmap+0x854/0xf00 [ 28.862769] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.863240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.863778] ksys_mmap_pgoff+0x3af/0x500 [ 28.864279] do_syscall_64+0x3f/0x90 [ 28.864731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.865371] RIP: 0033:0x7f447c0e3d82 [ 28.865822] 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 [ 28.867918] RSP: 002b:00007ffffc55b898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.868822] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f447c0e3d82 [ 28.869637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f447b51d000 [ 28.870467] RBP: 00007f447b51d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.871296] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647c9785d90 [ 28.872154] R13: 00007ffffc55b8b0 R14: 00007ffffc55b8e0 R15: 00007ffffc55bc40 [ 28.873008] [ 28.873300] [ 28.873514] Allocated by task 214: [ 28.873940] kasan_save_stack+0x22/0x50 [ 28.874425] kasan_set_track+0x25/0x30 [ 28.874916] __kasan_slab_alloc+0x59/0x70 [ 28.875432] kmem_cache_alloc+0x16b/0x370 [ 28.875941] vm_area_dup+0x20/0x160 [ 28.876399] __split_vma+0x170/0x950 [ 28.876861] split_vma+0xc6/0x110 [ 28.877298] mprotect_fixup+0x8d2/0xb30 [ 28.877788] do_mprotect_pkey+0x87e/0xd40 [ 28.878303] __x64_sys_mprotect+0x78/0xc0 [ 28.878817] do_syscall_64+0x3f/0x90 [ 28.879281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.879909] [ 28.880140] Freed by task 204: [ 28.880529] kasan_save_stack+0x22/0x50 [ 28.881023] kasan_set_track+0x25/0x30 [ 28.881513] kasan_save_free_info+0x2b/0x50 [ 28.882043] __kasan_slab_free+0x10a/0x190 [ 28.882570] kmem_cache_free+0x10d/0x4d0 [ 28.883073] rcu_core+0x8c8/0x2860 [ 28.883506] __do_softirq+0x1b7/0x7d4 [ 28.883969] [ 28.884196] Last potentially related work creation: [ 28.884779] kasan_save_stack+0x22/0x50 [ 28.885277] __kasan_record_aux_stack+0x8e/0xa0 [ 28.885833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.886458] remove_vma+0x139/0x170 [ 28.886907] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.887445] do_vmi_munmap+0x1f1/0x2b0 [ 28.887920] __vm_munmap+0x138/0x3a0 [ 28.888395] __x64_sys_munmap+0x59/0x80 [ 28.888886] do_syscall_64+0x3f/0x90 [ 28.889354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.890000] [ 28.890212] Second to last potentially related work creation: [ 28.890890] kasan_save_stack+0x22/0x50 [ 28.891386] __kasan_record_aux_stack+0x8e/0xa0 [ 28.891955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.892593] remove_vma+0x139/0x170 [ 28.893037] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.893586] do_vmi_munmap+0x1f1/0x2b0 [ 28.894067] mmap_region+0x1f9/0x2660 [ 28.894542] do_mmap+0x854/0xf00 [ 28.894969] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.895452] ksys_mmap_pgoff+0x3af/0x500 [ 28.895943] do_syscall_64+0x3f/0x90 [ 28.896415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897046] [ 28.897266] The buggy address belongs to the object at ffff88800ebe8000 [ 28.897266] which belongs to the cache vm_area_struct of size 168 [ 28.898692] The buggy address is located 88 bytes inside of [ 28.898692] freed 168-byte region [ffff88800ebe8000, ffff88800ebe80a8) [ 28.900065] [ 28.900275] The buggy address belongs to the physical page: [ 28.900934] page:000000002ebde020 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebe8 [ 28.902006] memcg:ffff88800ee04e01 [ 28.902451] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.903146] page_type: 0xffffffff() [ 28.903618] raw: 0100000000000200 ffff88800879fc80 ffffea00003595c0 dead000000000003 [ 28.904527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee04e01 [ 28.905405] page dumped because: kasan: bad access detected [ 28.906086] [ 28.906305] Memory state around the buggy address: [ 28.906871] ffff88800ebe7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.907697] ffff88800ebe7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.908540] >ffff88800ebe8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.909367] ^ [ 28.910107] ffff88800ebe8080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 28.910922] ffff88800ebe8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.911725] ================================================================== [ 28.912643] Disabling lock debugging due to kernel taint [ 30.716320] BUG: Bad rss-counter state mm:00000000c8aeb3a3 type:MM_FILEPAGES val:33 [ 30.717312] BUG: Bad rss-counter state mm:00000000c8aeb3a3 type:MM_ANONPAGES val:22 [ 31.102976] BUG: Bad rss-counter state mm:00000000bc3890da type:MM_FILEPAGES val:33 [ 31.104238] BUG: Bad rss-counter state mm:00000000bc3890da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42289' (ECDSA) to the list of known hosts. 2023/06/20 04:16:52 fuzzer started 2023/06/20 04:16:52 dialing manager at localhost:44161 2023/06/20 04:16:52 checking machine... 2023/06/20 04:16:52 checking revisions... [ 31.702554] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:52 testing simple program... [ 31.746213] cgroup: Unknown subsys name 'net' [ 31.781729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program [ 40.623315] BUG: Bad rss-counter state mm:0000000035876c52 type:MM_FILEPAGES val:173 [ 40.624727] BUG: Bad rss-counter state mm:0000000035876c52 type:MM_ANONPAGES val:50 VM DIAGNOSIS: 04:16:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861375e0 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff861375e4 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020dae R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fd10 R15=ffff888008d7f978 RIP=ffffffff81131153 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=00007ffe2400a000 CR3=000000000d82e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffff888008c58400 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=00007fd806a62000 CR3=0000000019ee8000 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=2032353a36313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000