syzkaller login: [ 39.618075] BUG: Bad rss-counter state mm:00000000501df442 type:MM_FILEPAGES val:33 [ 39.619133] BUG: Bad rss-counter state mm:00000000501df442 type:MM_ANONPAGES val:22 [ 39.786047] ================================================================== [ 39.787178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.788202] Read of size 8 at addr ffff888014287b38 by task sshd/221 [ 39.788983] [ 39.789196] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.790121] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.791114] Call Trace: [ 39.791439] [ 39.791732] dump_stack_lvl+0x91/0xf0 [ 39.792230] print_report+0xcc/0x620 [ 39.792720] ? __virt_addr_valid+0x102/0x340 [ 39.793291] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.793907] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.794531] kasan_report+0xbe/0xf0 [ 39.795009] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.795646] vma_interval_tree_remove+0xc75/0xec0 [ 39.796256] vma_prepare+0xc54/0x11a0 [ 39.796739] __split_vma+0x5af/0x950 [ 39.797207] ? __pfx___split_vma+0x10/0x10 [ 39.797730] ? find_held_lock+0x2c/0x110 [ 39.798284] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.798845] ? avc_lookup+0xc8/0x1d0 [ 39.799333] ? lock_is_held_type+0x9f/0x120 [ 39.799878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.800484] ? mtree_range_walk+0x632/0x900 [ 39.801035] ? mas_walk+0x5c7/0x7c0 [ 39.801517] do_vmi_munmap+0x1f1/0x2b0 [ 39.802023] mmap_region+0x1f9/0x2660 [ 39.802526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.803044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.803762] ? __pfx_lock_acquire+0x10/0x10 [ 39.804296] ? __pfx_mmap_region+0x10/0x10 [ 39.804845] ? security_mmap_addr+0x7d/0xa0 [ 39.805383] ? get_unmapped_area+0x1f5/0x3f0 [ 39.805932] do_mmap+0x854/0xf00 [ 39.806394] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.806889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.807456] ksys_mmap_pgoff+0x3af/0x500 [ 39.807963] do_syscall_64+0x3f/0x90 [ 39.808446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.809103] RIP: 0033:0x7f7dc72f4d82 [ 39.809562] 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 [ 39.811689] RSP: 002b:00007fffe9e35598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.812596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dc72f4d82 [ 39.813454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dc672e000 [ 39.814331] RBP: 00007f7dc672e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.815186] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4bf675b20 [ 39.816040] R13: 00007fffe9e355b0 R14: 00007fffe9e355e0 R15: 00007fffe9e35940 [ 39.816899] [ 39.817198] [ 39.817413] Allocated by task 214: [ 39.817838] kasan_save_stack+0x22/0x50 [ 39.818357] kasan_set_track+0x25/0x30 [ 39.818858] __kasan_slab_alloc+0x59/0x70 [ 39.819385] kmem_cache_alloc+0x16b/0x370 [ 39.819923] vm_area_dup+0x20/0x160 [ 39.820398] __split_vma+0x170/0x950 [ 39.820864] split_vma+0xc6/0x110 [ 39.821305] mprotect_fixup+0x8d2/0xb30 [ 39.821820] do_mprotect_pkey+0x87e/0xd40 [ 39.822361] __x64_sys_mprotect+0x78/0xc0 [ 39.822898] do_syscall_64+0x3f/0x90 [ 39.823385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.824038] [ 39.824256] Freed by task 19: [ 39.824643] kasan_save_stack+0x22/0x50 [ 39.825153] kasan_set_track+0x25/0x30 [ 39.825651] kasan_save_free_info+0x2b/0x50 [ 39.826218] __kasan_slab_free+0x10a/0x190 [ 39.826762] kmem_cache_free+0x10d/0x4d0 [ 39.827278] rcu_core+0x8c8/0x2860 [ 39.827730] __do_softirq+0x1b7/0x7d4 [ 39.828229] [ 39.828449] Last potentially related work creation: [ 39.829033] kasan_save_stack+0x22/0x50 [ 39.829536] __kasan_record_aux_stack+0x8e/0xa0 [ 39.830112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.830768] remove_vma+0x139/0x170 [ 39.831245] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.831815] do_vmi_munmap+0x1f1/0x2b0 [ 39.832314] __vm_munmap+0x138/0x3a0 [ 39.832794] __x64_sys_munmap+0x59/0x80 [ 39.833303] do_syscall_64+0x3f/0x90 [ 39.833776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.834441] [ 39.834660] Second to last potentially related work creation: [ 39.835342] kasan_save_stack+0x22/0x50 [ 39.835844] __kasan_record_aux_stack+0x8e/0xa0 [ 39.836414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.837056] remove_vma+0x139/0x170 [ 39.837521] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.838078] do_vmi_munmap+0x1f1/0x2b0 [ 39.838584] __vm_munmap+0x138/0x3a0 [ 39.839067] __x64_sys_munmap+0x59/0x80 [ 39.839569] do_syscall_64+0x3f/0x90 [ 39.840066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.840732] [ 39.840955] The buggy address belongs to the object at ffff888014287ae0 [ 39.840955] which belongs to the cache vm_area_struct of size 168 [ 39.842522] The buggy address is located 88 bytes inside of [ 39.842522] freed 168-byte region [ffff888014287ae0, ffff888014287b88) [ 39.843997] [ 39.844253] The buggy address belongs to the physical page: [ 39.844944] page:000000002e0bf7c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14287 [ 39.846103] memcg:ffff888019812201 [ 39.846564] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.847292] page_type: 0xffffffff() [ 39.847752] raw: 0100000000000200 ffff88800879fc80 ffffea000067e240 dead000000000005 [ 39.848714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019812201 [ 39.849655] page dumped because: kasan: bad access detected [ 39.850381] [ 39.850604] Memory state around the buggy address: [ 39.851210] ffff888014287a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.852106] ffff888014287a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.853000] >ffff888014287b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.853891] ^ [ 39.854544] ffff888014287b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.855437] ffff888014287c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.856366] ================================================================== [ 39.857532] Disabling lock debugging due to kernel taint [ 41.615849] BUG: Bad rss-counter state mm:00000000b90a4747 type:MM_FILEPAGES val:33 [ 41.616642] BUG: Bad rss-counter state mm:00000000b90a4747 type:MM_ANONPAGES val:22 [ 42.082968] BUG: Bad rss-counter state mm:00000000eed837a8 type:MM_FILEPAGES val:33 [ 42.084120] BUG: Bad rss-counter state mm:00000000eed837a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2641' (ECDSA) to the list of known hosts. 2023/06/20 03:31:47 fuzzer started 2023/06/20 03:31:47 dialing manager at localhost:44161 2023/06/20 03:31:47 checking machine... 2023/06/20 03:31:47 checking revisions... [ 42.758971] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:31:47 testing simple program... [ 42.806513] cgroup: Unknown subsys name 'net' [ 42.852328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe197323f8 CR3=0000000005482000 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=00007f11249595100000557fd871f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8149630a RCX=0000000000000001 RDX=1ffff11001d2ae96 RSI=ffff88800e957a28 RDI=ffffffff8149630a RBP=ffffffff8149630a RSP=ffff88800e957400 R8 =0000000000000001 R9 =ffff88800e957498 R10=0000000000038001 R11=0000000000091beb R12=ffff88800e957520 R13=0000000000000000 R14=ffff888019949b40 R15=0000000000082cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007f6cfb466900 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=00007ffd3a71d000 CR3=000000000efa4000 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=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