syzkaller login: [ 38.817928] BUG: Bad rss-counter state mm:00000000a11fa201 type:MM_FILEPAGES val:33 [ 38.819107] BUG: Bad rss-counter state mm:00000000a11fa201 type:MM_ANONPAGES val:22 [ 38.949886] ================================================================== [ 38.950560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951229] Read of size 8 at addr ffff88800f4985c8 by task sshd/225 [ 38.951796] [ 38.951949] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.952525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.953157] Call Trace: [ 38.953367] [ 38.953562] dump_stack_lvl+0x91/0xf0 [ 38.953919] print_report+0xcc/0x620 [ 38.954257] ? __virt_addr_valid+0x102/0x340 [ 38.954874] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955299] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955693] kasan_report+0xbe/0xf0 [ 38.956002] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956402] vma_interval_tree_remove+0xc75/0xec0 [ 38.956828] vma_prepare+0xc54/0x11a0 [ 38.957157] __split_vma+0x5af/0x950 [ 38.957478] ? __pfx___split_vma+0x10/0x10 [ 38.957826] ? find_held_lock+0x2c/0x110 [ 38.958174] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.958558] ? lock_is_held_type+0x9f/0x120 [ 38.958958] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.959366] ? mtree_range_walk+0x632/0x900 [ 38.959736] ? mas_walk+0x5c7/0x7c0 [ 38.960067] do_vmi_munmap+0x1f1/0x2b0 [ 38.960404] mmap_region+0x1f9/0x2660 [ 38.960729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.961083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.961565] ? __pfx_lock_acquire+0x10/0x10 [ 38.961959] ? __pfx_mmap_region+0x10/0x10 [ 38.962332] ? security_mmap_addr+0x7d/0xa0 [ 38.962710] ? get_unmapped_area+0x1f5/0x3f0 [ 38.963132] do_mmap+0x854/0xf00 [ 38.963432] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.963761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.964149] ksys_mmap_pgoff+0x3af/0x500 [ 38.964485] do_syscall_64+0x3f/0x90 [ 38.964803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965220] RIP: 0033:0x7fbc6b3c8d82 [ 38.965527] 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 [ 38.967004] RSP: 002b:00007fff50534558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.967630] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc6b3c8d82 [ 38.968203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc6a802000 [ 38.968764] RBP: 00007fbc6a802000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969362] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559155ecbd90 [ 38.969966] R13: 00007fff50534570 R14: 00007fff505345a0 R15: 00007fff50534900 [ 38.970542] [ 38.970746] [ 38.970920] Allocated by task 218: [ 38.971219] kasan_save_stack+0x22/0x50 [ 38.971572] kasan_set_track+0x25/0x30 [ 38.971915] __kasan_slab_alloc+0x59/0x70 [ 38.972254] kmem_cache_alloc+0x16b/0x370 [ 38.972590] vm_area_dup+0x20/0x160 [ 38.972882] __split_vma+0x170/0x950 [ 38.973181] split_vma+0xc6/0x110 [ 38.973456] mprotect_fixup+0x8d2/0xb30 [ 38.973769] do_mprotect_pkey+0x87e/0xd40 [ 38.974103] __x64_sys_mprotect+0x78/0xc0 [ 38.974435] do_syscall_64+0x3f/0x90 [ 38.974750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.975203] [ 38.975346] Freed by task 218: [ 38.975595] kasan_save_stack+0x22/0x50 [ 38.975927] kasan_set_track+0x25/0x30 [ 38.976266] kasan_save_free_info+0x2b/0x50 [ 38.976638] __kasan_slab_free+0x10a/0x190 [ 38.977004] kmem_cache_free+0x10d/0x4d0 [ 38.977350] rcu_core+0x8c8/0x2860 [ 38.977661] __do_softirq+0x1b7/0x7d4 [ 38.977989] [ 38.978127] Last potentially related work creation: [ 38.978531] kasan_save_stack+0x22/0x50 [ 38.978920] __kasan_record_aux_stack+0x8e/0xa0 [ 38.979329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.979780] remove_vma+0x139/0x170 [ 38.980081] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.980465] do_vmi_munmap+0x1f1/0x2b0 [ 38.980793] __vm_munmap+0x138/0x3a0 [ 38.981133] __x64_sys_munmap+0x59/0x80 [ 38.981511] do_syscall_64+0x3f/0x90 [ 38.981843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982276] [ 38.982426] The buggy address belongs to the object at ffff88800f498570 [ 38.982426] which belongs to the cache vm_area_struct of size 168 [ 38.983494] The buggy address is located 88 bytes inside of [ 38.983494] freed 168-byte region [ffff88800f498570, ffff88800f498618) [ 38.984447] [ 38.984595] The buggy address belongs to the physical page: [ 38.985055] page:00000000d73e6e54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf498 [ 38.985796] memcg:ffff88800e992501 [ 38.986093] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986551] page_type: 0xffffffff() [ 38.986901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.987553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e992501 [ 38.988236] page dumped because: kasan: bad access detected [ 38.988701] [ 38.988875] Memory state around the buggy address: [ 38.989280] ffff88800f498480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.989897] ffff88800f498500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.990478] >ffff88800f498580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.991109] ^ [ 38.991578] ffff88800f498600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.992131] ffff88800f498680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992736] ================================================================== [ 38.993541] Disabling lock debugging due to kernel taint [ 40.921086] BUG: Bad rss-counter state mm:000000007fa15ad3 type:MM_FILEPAGES val:33 [ 40.921817] BUG: Bad rss-counter state mm:000000007fa15ad3 type:MM_ANONPAGES val:22 [ 41.290174] BUG: Bad rss-counter state mm:000000003e11205e type:MM_FILEPAGES val:33 [ 41.290932] BUG: Bad rss-counter state mm:000000003e11205e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63606' (ECDSA) to the list of known hosts. 2023/06/21 08:56:07 fuzzer started 2023/06/21 08:56:08 dialing manager at localhost:36067 2023/06/21 08:56:08 checking machine... 2023/06/21 08:56:08 checking revisions... [ 41.860456] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:56:08 testing simple program... [ 41.902794] cgroup: Unknown subsys name 'net' [ 41.982551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=000056210e7cc000 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=00007f8ee63b2510000056210e7c8790 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=0000000000000000 RBX=ffff8880096eb360 RCX=ffff8880096eb360 RDX=0000000000800016 RSI=ffff8880096eb360 RDI=ffff8880087b23c0 RBP=ffff8880147d7a28 RSP=ffff8880147d7990 R8 =0000000000800015 R9 =0000000000000000 R10=ffffea000025bac0 R11=0000000000800078 R12=ffffea000025bac0 R13=ffff8880096eb440 R14=0000000000800015 R15=ffff8880087b23c0 RIP=ffffffff81809672 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 00007ff18f511900 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=00007ffd97304000 CR3=000000001c932000 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