syzkaller login: [ 31.546472] BUG: Bad rss-counter state mm:000000006de80be7 type:MM_FILEPAGES val:33 [ 31.547802] BUG: Bad rss-counter state mm:000000006de80be7 type:MM_ANONPAGES val:22 [ 31.713614] ================================================================== [ 31.714623] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.715566] Read of size 8 at addr ffff88800dab0140 by task sshd/221 [ 31.716369] [ 31.716590] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.717457] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.718436] Call Trace: [ 31.718762] [ 31.719047] dump_stack_lvl+0x91/0xf0 [ 31.719544] print_report+0xcc/0x620 [ 31.720036] ? __virt_addr_valid+0x102/0x340 [ 31.720607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721237] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721867] kasan_report+0xbe/0xf0 [ 31.722349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722970] vma_interval_tree_remove+0xc75/0xec0 [ 31.723566] vma_prepare+0xc54/0x11a0 [ 31.724039] __split_vma+0x5af/0x950 [ 31.724532] ? __pfx___split_vma+0x10/0x10 [ 31.725066] ? find_held_lock+0x2c/0x110 [ 31.725592] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.726151] ? lock_is_held_type+0x9f/0x120 [ 31.726696] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.727303] ? mtree_range_walk+0x632/0x900 [ 31.727853] ? mas_walk+0x5c7/0x7c0 [ 31.728341] do_vmi_munmap+0x1f1/0x2b0 [ 31.728840] mmap_region+0x1f9/0x2660 [ 31.729325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.729833] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.730544] ? __pfx_lock_acquire+0x10/0x10 [ 31.731077] ? __pfx_mmap_region+0x10/0x10 [ 31.731611] ? security_mmap_addr+0x7d/0xa0 [ 31.732158] ? get_unmapped_area+0x1f5/0x3f0 [ 31.732709] do_mmap+0x854/0xf00 [ 31.733150] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.733649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.734211] ksys_mmap_pgoff+0x3af/0x500 [ 31.734717] do_syscall_64+0x3f/0x90 [ 31.735192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.735848] RIP: 0033:0x7f35d21add82 [ 31.736313] 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 [ 31.738433] RSP: 002b:00007ffd8a987938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.739342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35d21add82 [ 31.740222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35d15e7000 [ 31.741064] RBP: 00007f35d15e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.741927] R10: 0000000000000812 R11: 0000000000000206 R12: 000055673af25d90 [ 31.742774] R13: 00007ffd8a987950 R14: 00007ffd8a987980 R15: 00007ffd8a987ce0 [ 31.743631] [ 31.743922] [ 31.744148] Allocated by task 214: [ 31.744577] kasan_save_stack+0x22/0x50 [ 31.745080] kasan_set_track+0x25/0x30 [ 31.745576] __kasan_slab_alloc+0x59/0x70 [ 31.746103] kmem_cache_alloc+0x16b/0x370 [ 31.746624] vm_area_dup+0x20/0x160 [ 31.747083] __split_vma+0x170/0x950 [ 31.747551] split_vma+0xc6/0x110 [ 31.747987] mprotect_fixup+0x8d2/0xb30 [ 31.748493] do_mprotect_pkey+0x87e/0xd40 [ 31.749009] __x64_sys_mprotect+0x78/0xc0 [ 31.749526] do_syscall_64+0x3f/0x90 [ 31.749995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750643] [ 31.750856] Freed by task 214: [ 31.751247] kasan_save_stack+0x22/0x50 [ 31.751745] kasan_set_track+0x25/0x30 [ 31.752257] kasan_save_free_info+0x2b/0x50 [ 31.752784] __kasan_slab_free+0x10a/0x190 [ 31.753312] kmem_cache_free+0x10d/0x4d0 [ 31.753823] rcu_core+0x8c8/0x2860 [ 31.754268] __do_softirq+0x1b7/0x7d4 [ 31.754750] [ 31.754962] Last potentially related work creation: [ 31.755545] kasan_save_stack+0x22/0x50 [ 31.756046] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.757279] remove_vma+0x139/0x170 [ 31.757730] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.758293] do_vmi_munmap+0x1f1/0x2b0 [ 31.758779] __vm_munmap+0x138/0x3a0 [ 31.759242] __x64_sys_munmap+0x59/0x80 [ 31.759743] do_syscall_64+0x3f/0x90 [ 31.760222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760862] [ 31.761082] Second to last potentially related work creation: [ 31.761766] kasan_save_stack+0x22/0x50 [ 31.762268] __kasan_record_aux_stack+0x8e/0xa0 [ 31.762841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.763477] remove_vma+0x139/0x170 [ 31.763928] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.764494] do_vmi_munmap+0x1f1/0x2b0 [ 31.765000] mmap_region+0x1f9/0x2660 [ 31.765484] do_mmap+0x854/0xf00 [ 31.765914] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.766404] ksys_mmap_pgoff+0x3af/0x500 [ 31.766904] do_syscall_64+0x3f/0x90 [ 31.767373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.768010] [ 31.768229] The buggy address belongs to the object at ffff88800dab00e8 [ 31.768229] which belongs to the cache vm_area_struct of size 168 [ 31.769696] The buggy address is located 88 bytes inside of [ 31.769696] freed 168-byte region [ffff88800dab00e8, ffff88800dab0190) [ 31.771099] [ 31.771317] The buggy address belongs to the physical page: [ 31.771970] page:000000002852b418 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab0 [ 31.773055] memcg:ffff88800959f701 [ 31.773483] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.774139] page_type: 0xffffffff() [ 31.774590] raw: 0100000000000200 ffff8880087a0c80 ffffea0000655b40 dead000000000008 [ 31.775500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800959f701 [ 31.776402] page dumped because: kasan: bad access detected [ 31.777058] [ 31.777274] Memory state around the buggy address: [ 31.777845] ffff88800dab0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.778690] ffff88800dab0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.779537] >ffff88800dab0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.780388] ^ [ 31.781032] ffff88800dab0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.781891] ffff88800dab0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.782734] ================================================================== [ 31.783703] Disabling lock debugging due to kernel taint [ 33.679586] BUG: Bad rss-counter state mm:000000008ca92370 type:MM_FILEPAGES val:33 [ 33.680883] BUG: Bad rss-counter state mm:000000008ca92370 type:MM_ANONPAGES val:22 [ 34.203860] BUG: Bad rss-counter state mm:00000000999cdb0b type:MM_FILEPAGES val:33 [ 34.205178] BUG: Bad rss-counter state mm:00000000999cdb0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61885' (ECDSA) to the list of known hosts. 2023/06/20 18:47:01 fuzzer started 2023/06/20 18:47:01 dialing manager at localhost:36067 2023/06/20 18:47:01 checking machine... 2023/06/20 18:47:01 checking revisions... [ 34.872114] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:47:01 testing simple program... [ 34.923499] cgroup: Unknown subsys name 'net' [ 34.963530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:00 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85dfe020 RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe01c RSP=ffff88806ce099c0 R8 =ffffffff86138e62 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe024 R13=ffffffff85dfe000 R14=ffffffff85dfe018 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007fa0cf14a900 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=00007ffd41b33000 CR3=0000000016bee000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fd20b07f120 CR3=000000000dc3c000 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=2030303a37343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a37343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000