syzkaller login: [ 31.086418] BUG: Bad rss-counter state mm:000000001513cc6e type:MM_FILEPAGES val:33 [ 31.087911] BUG: Bad rss-counter state mm:000000001513cc6e type:MM_ANONPAGES val:22 [ 31.253108] ================================================================== [ 31.254147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.255295] Read of size 8 at addr ffff88800e4b7880 by task sshd/219 [ 31.256172] [ 31.256427] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.257436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.258553] Call Trace: [ 31.258917] [ 31.259248] dump_stack_lvl+0x91/0xf0 [ 31.259821] print_report+0xcc/0x620 [ 31.260397] ? __virt_addr_valid+0x102/0x340 [ 31.261033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261740] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262431] kasan_report+0xbe/0xf0 [ 31.262980] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263727] vma_interval_tree_remove+0xc75/0xec0 [ 31.264464] vma_prepare+0xc54/0x11a0 [ 31.265033] __split_vma+0x5af/0x950 [ 31.265597] ? __pfx___split_vma+0x10/0x10 [ 31.266224] ? find_held_lock+0x2c/0x110 [ 31.266839] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.267504] ? lock_is_held_type+0x9f/0x120 [ 31.268139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.268870] ? mtree_range_walk+0x632/0x900 [ 31.269522] ? mas_walk+0x5c7/0x7c0 [ 31.270082] do_vmi_munmap+0x1f1/0x2b0 [ 31.270666] mmap_region+0x1f9/0x2660 [ 31.271241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.271848] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.272711] ? __pfx_lock_acquire+0x10/0x10 [ 31.273335] ? __pfx_mmap_region+0x10/0x10 [ 31.273956] ? security_mmap_addr+0x7d/0xa0 [ 31.274585] ? get_unmapped_area+0x1f5/0x3f0 [ 31.275230] do_mmap+0x854/0xf00 [ 31.275739] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.276325] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.277018] ksys_mmap_pgoff+0x3af/0x500 [ 31.277617] do_syscall_64+0x3f/0x90 [ 31.278179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278944] RIP: 0033:0x7f78ca558d82 [ 31.279483] 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 [ 31.282017] RSP: 002b:00007ffc6f3e7208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.283083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78ca558d82 [ 31.284082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78c9992000 [ 31.285100] RBP: 00007f78c9992000 R08: 0000000000000009 R09: 0000000000001000 [ 31.286102] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0c7af5ec0 [ 31.287095] R13: 00007ffc6f3e7220 R14: 00007ffc6f3e7250 R15: 00007ffc6f3e75b0 [ 31.288111] [ 31.288467] [ 31.288724] Allocated by task 212: [ 31.289220] kasan_save_stack+0x22/0x50 [ 31.289814] kasan_set_track+0x25/0x30 [ 31.290394] __kasan_slab_alloc+0x59/0x70 [ 31.291009] kmem_cache_alloc+0x16b/0x370 [ 31.291614] vm_area_dup+0x20/0x160 [ 31.292143] __split_vma+0x170/0x950 [ 31.292705] split_vma+0xc6/0x110 [ 31.293227] mprotect_fixup+0x8d2/0xb30 [ 31.293783] do_mprotect_pkey+0x87e/0xd40 [ 31.294373] __x64_sys_mprotect+0x78/0xc0 [ 31.294964] do_syscall_64+0x3f/0x90 [ 31.295507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296238] [ 31.296501] Freed by task 13: [ 31.296944] kasan_save_stack+0x22/0x50 [ 31.297513] kasan_set_track+0x25/0x30 [ 31.298076] kasan_save_free_info+0x2b/0x50 [ 31.298684] __kasan_slab_free+0x10a/0x190 [ 31.299284] kmem_cache_free+0x10d/0x4d0 [ 31.299853] rcu_core+0x8c8/0x2860 [ 31.300356] __do_softirq+0x1b7/0x7d4 [ 31.300924] [ 31.301170] Last potentially related work creation: [ 31.301845] kasan_save_stack+0x22/0x50 [ 31.302419] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.303796] remove_vma+0x139/0x170 [ 31.304310] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.304963] do_vmi_munmap+0x1f1/0x2b0 [ 31.305515] __vm_munmap+0x138/0x3a0 [ 31.306048] __x64_sys_munmap+0x59/0x80 [ 31.306607] do_syscall_64+0x3f/0x90 [ 31.307148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307881] [ 31.308128] The buggy address belongs to the object at ffff88800e4b7828 [ 31.308128] which belongs to the cache vm_area_struct of size 168 [ 31.309801] The buggy address is located 88 bytes inside of [ 31.309801] freed 168-byte region [ffff88800e4b7828, ffff88800e4b78d0) [ 31.311390] [ 31.311638] The buggy address belongs to the physical page: [ 31.312411] page:00000000bf29ccf3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4b7 [ 31.313640] memcg:ffff88800e565101 [ 31.314122] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.314843] page_type: 0xffffffff() [ 31.315348] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.316419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e565101 [ 31.317452] page dumped because: kasan: bad access detected [ 31.318205] [ 31.318454] Memory state around the buggy address: [ 31.319112] ffff88800e4b7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.320087] ffff88800e4b7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.321065] >ffff88800e4b7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.322022] ^ [ 31.322491] ffff88800e4b7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.323466] ffff88800e4b7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.324449] ================================================================== [ 31.325635] Disabling lock debugging due to kernel taint [ 33.923653] BUG: Bad rss-counter state mm:0000000075570767 type:MM_FILEPAGES val:33 [ 33.925204] BUG: Bad rss-counter state mm:0000000075570767 type:MM_ANONPAGES val:22 [ 34.725119] BUG: Bad rss-counter state mm:00000000ad85ea50 type:MM_FILEPAGES val:33 [ 34.726151] BUG: Bad rss-counter state mm:00000000ad85ea50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43861' (ECDSA) to the list of known hosts. 2023/06/21 00:02:47 fuzzer started 2023/06/21 00:02:48 dialing manager at localhost:36067 2023/06/21 00:02:48 checking machine... 2023/06/21 00:02:48 checking revisions... [ 35.667076] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:02:48 testing simple program... [ 35.718230] cgroup: Unknown subsys name 'net' [ 35.815751] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:02:47 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f338000 RCX=0000000000000000 RDX=1ffff11001e67208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800f339040 R15=000000000000000a RIP=ffffffff83018ab7 RFL=00000046 [---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=00007f4ccaa77328 CR3=000000001687a000 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=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=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 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=00007f7b24801dc0 CR3=000000000e912000 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=2037343a32303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000