syzkaller login: [ 31.328249] BUG: Bad rss-counter state mm:00000000ec431f82 type:MM_FILEPAGES val:33 [ 31.329471] BUG: Bad rss-counter state mm:00000000ec431f82 type:MM_ANONPAGES val:22 [ 31.480638] ================================================================== [ 31.481694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.482787] Read of size 8 at addr ffff888009aca5c8 by task sshd/218 [ 31.483760] [ 31.483979] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.484830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.485794] Call Trace: [ 31.486112] [ 31.486397] dump_stack_lvl+0x91/0xf0 [ 31.486887] print_report+0xcc/0x620 [ 31.487383] ? __virt_addr_valid+0x102/0x340 [ 31.487925] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.488544] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.489161] kasan_report+0xbe/0xf0 [ 31.489640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.490253] vma_interval_tree_remove+0xc75/0xec0 [ 31.490856] vma_prepare+0xc54/0x11a0 [ 31.491345] __split_vma+0x5af/0x950 [ 31.491817] ? __pfx___split_vma+0x10/0x10 [ 31.492356] ? find_held_lock+0x2c/0x110 [ 31.492884] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.493443] ? lock_is_held_type+0x9f/0x120 [ 31.493971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.494566] ? mtree_range_walk+0x632/0x900 [ 31.495108] ? mas_walk+0x5c7/0x7c0 [ 31.495582] do_vmi_munmap+0x1f1/0x2b0 [ 31.496067] mmap_region+0x1f9/0x2660 [ 31.496538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.497053] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.497749] ? __pfx_lock_acquire+0x10/0x10 [ 31.498274] ? __pfx_mmap_region+0x10/0x10 [ 31.498801] ? security_mmap_addr+0x7d/0xa0 [ 31.499338] ? get_unmapped_area+0x1f5/0x3f0 [ 31.499879] do_mmap+0x854/0xf00 [ 31.500321] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.500812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.501366] ksys_mmap_pgoff+0x3af/0x500 [ 31.501869] do_syscall_64+0x3f/0x90 [ 31.502344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.502987] RIP: 0033:0x7fcdbf12dd82 [ 31.503462] 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 [ 31.505570] RSP: 002b:00007ffedd78fc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.506486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdbf12dd82 [ 31.507327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdbe567000 [ 31.508157] RBP: 00007fcdbe567000 R08: 0000000000000009 R09: 0000000000001000 [ 31.508998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b983fabf70 [ 31.509836] R13: 00007ffedd78fc80 R14: 00007ffedd78fcb0 R15: 00007ffedd790010 [ 31.510697] [ 31.510985] [ 31.511197] Allocated by task 211: [ 31.511632] kasan_save_stack+0x22/0x50 [ 31.512133] kasan_set_track+0x25/0x30 [ 31.512621] __kasan_slab_alloc+0x59/0x70 [ 31.513133] kmem_cache_alloc+0x16b/0x370 [ 31.513639] vm_area_dup+0x20/0x160 [ 31.514089] __split_vma+0x170/0x950 [ 31.514545] split_vma+0xc6/0x110 [ 31.514988] mprotect_fixup+0x8d2/0xb30 [ 31.515504] do_mprotect_pkey+0x87e/0xd40 [ 31.516027] __x64_sys_mprotect+0x78/0xc0 [ 31.516544] do_syscall_64+0x3f/0x90 [ 31.517025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517663] [ 31.517887] Freed by task 9: [ 31.518261] kasan_save_stack+0x22/0x50 [ 31.518782] kasan_set_track+0x25/0x30 [ 31.519305] kasan_save_free_info+0x2b/0x50 [ 31.519845] __kasan_slab_free+0x10a/0x190 [ 31.520384] kmem_cache_free+0x10d/0x4d0 [ 31.520899] rcu_core+0x8c8/0x2860 [ 31.521340] __do_softirq+0x1b7/0x7d4 [ 31.521818] [ 31.522030] Last potentially related work creation: [ 31.522613] kasan_save_stack+0x22/0x50 [ 31.523108] __kasan_record_aux_stack+0x8e/0xa0 [ 31.523689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524326] remove_vma+0x139/0x170 [ 31.524768] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.525326] do_vmi_munmap+0x1f1/0x2b0 [ 31.525807] __vm_munmap+0x138/0x3a0 [ 31.526265] __x64_sys_munmap+0x59/0x80 [ 31.526758] do_syscall_64+0x3f/0x90 [ 31.527233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.527908] [ 31.528120] Second to last potentially related work creation: [ 31.528800] kasan_save_stack+0x22/0x50 [ 31.529294] __kasan_record_aux_stack+0x8e/0xa0 [ 31.529860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.530489] remove_vma+0x139/0x170 [ 31.530965] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.531531] do_vmi_munmap+0x1f1/0x2b0 [ 31.532034] mmap_region+0x1f9/0x2660 [ 31.532520] do_mmap+0x854/0xf00 [ 31.532957] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.533447] ksys_mmap_pgoff+0x3af/0x500 [ 31.533951] do_syscall_64+0x3f/0x90 [ 31.534444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535111] [ 31.535351] The buggy address belongs to the object at ffff888009aca570 [ 31.535351] which belongs to the cache vm_area_struct of size 168 [ 31.536828] The buggy address is located 88 bytes inside of [ 31.536828] freed 168-byte region [ffff888009aca570, ffff888009aca618) [ 31.538240] [ 31.538458] The buggy address belongs to the physical page: [ 31.539123] page:0000000072d8ff78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9aca [ 31.540225] memcg:ffff88800d97c701 [ 31.540655] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.541302] page_type: 0xffffffff() [ 31.541761] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b2c0 dead000000000002 [ 31.542703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97c701 [ 31.543638] page dumped because: kasan: bad access detected [ 31.544322] [ 31.544532] Memory state around the buggy address: [ 31.545132] ffff888009aca480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.546002] ffff888009aca500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.546874] >ffff888009aca580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.547759] ^ [ 31.548428] ffff888009aca600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.549322] ffff888009aca680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.550214] ================================================================== [ 31.551241] Disabling lock debugging due to kernel taint [ 33.723002] BUG: Bad rss-counter state mm:000000001f6be6be type:MM_FILEPAGES val:33 [ 33.724121] BUG: Bad rss-counter state mm:000000001f6be6be type:MM_ANONPAGES val:22 [ 34.160301] BUG: Bad rss-counter state mm:00000000bbb04587 type:MM_FILEPAGES val:33 [ 34.161233] BUG: Bad rss-counter state mm:00000000bbb04587 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54584' (ECDSA) to the list of known hosts. 2023/06/21 07:59:41 fuzzer started 2023/06/21 07:59:41 dialing manager at localhost:36067 2023/06/21 07:59:41 checking machine... 2023/06/21 07:59:41 checking revisions... [ 34.879731] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:59:41 testing simple program... [ 34.930221] cgroup: Unknown subsys name 'net' [ 34.978779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:59:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=ffffffff8184ce41 RDX=ffff88800f1cd1c0 RSI=000000000000000c RDI=0000000000000000 RBP=00007fffcced7e98 RSP=ffff888016417ac8 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=00000aea00000aea R12=ffff888016417bb8 R13=0000000000000001 R14=ffff888016417bb8 R15=00007fffcced7e74 RIP=ffffffff814c0438 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 00007fbb698ff900 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=00007fbb69eb6618 CR3=000000000ea70000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007ffdeb7bf958 CR3=000000000e362000 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=2031343a39353a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000