syzkaller login: [ 31.490835] BUG: Bad rss-counter state mm:0000000029e55083 type:MM_FILEPAGES val:33 [ 31.491619] BUG: Bad rss-counter state mm:0000000029e55083 type:MM_ANONPAGES val:22 [ 31.621485] ================================================================== [ 31.622187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.622857] Read of size 8 at addr ffff888017a0dc20 by task sshd/221 [ 31.623429] [ 31.623588] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.624198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.625018] Call Trace: [ 31.625265] [ 31.625490] dump_stack_lvl+0x91/0xf0 [ 31.625839] print_report+0xcc/0x620 [ 31.626213] ? __virt_addr_valid+0x102/0x340 [ 31.626618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627551] kasan_report+0xbe/0xf0 [ 31.627887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.628332] vma_interval_tree_remove+0xc75/0xec0 [ 31.628763] vma_prepare+0xc54/0x11a0 [ 31.629109] __split_vma+0x5af/0x950 [ 31.629450] ? __pfx___split_vma+0x10/0x10 [ 31.629831] ? find_held_lock+0x2c/0x110 [ 31.630198] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.630603] ? lock_is_held_type+0x9f/0x120 [ 31.630987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.631452] ? mtree_range_walk+0x632/0x900 [ 31.631841] ? mas_walk+0x5c7/0x7c0 [ 31.632187] do_vmi_munmap+0x1f1/0x2b0 [ 31.632572] mmap_region+0x1f9/0x2660 [ 31.632927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.633322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.633845] ? __pfx_lock_acquire+0x10/0x10 [ 31.634236] ? __pfx_mmap_region+0x10/0x10 [ 31.634618] ? security_mmap_addr+0x7d/0xa0 [ 31.634989] ? get_unmapped_area+0x1f5/0x3f0 [ 31.635390] do_mmap+0x854/0xf00 [ 31.635726] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.636076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.636485] ksys_mmap_pgoff+0x3af/0x500 [ 31.636853] do_syscall_64+0x3f/0x90 [ 31.637205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.637672] RIP: 0033:0x7f90fe11ed82 [ 31.638002] 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 [ 31.639551] RSP: 002b:00007ffd8e222148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.640208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90fe11ed82 [ 31.640822] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90fd558000 [ 31.641435] RBP: 00007f90fd558000 R08: 0000000000000009 R09: 0000000000001000 [ 31.642038] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638bf04ed90 [ 31.642703] R13: 00007ffd8e222160 R14: 00007ffd8e222190 R15: 00007ffd8e2224f0 [ 31.643322] [ 31.643556] [ 31.643710] Allocated by task 213: [ 31.644023] kasan_save_stack+0x22/0x50 [ 31.644400] kasan_set_track+0x25/0x30 [ 31.644757] __kasan_slab_alloc+0x59/0x70 [ 31.645144] kmem_cache_alloc+0x16b/0x370 [ 31.645518] vm_area_dup+0x20/0x160 [ 31.645843] __split_vma+0x170/0x950 [ 31.646175] split_vma+0xc6/0x110 [ 31.646495] mprotect_fixup+0x8d2/0xb30 [ 31.646850] do_mprotect_pkey+0x87e/0xd40 [ 31.647234] __x64_sys_mprotect+0x78/0xc0 [ 31.647621] do_syscall_64+0x3f/0x90 [ 31.647961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.648422] [ 31.648577] Freed by task 203: [ 31.648859] kasan_save_stack+0x22/0x50 [ 31.649216] kasan_set_track+0x25/0x30 [ 31.649564] kasan_save_free_info+0x2b/0x50 [ 31.649946] __kasan_slab_free+0x10a/0x190 [ 31.650322] kmem_cache_free+0x10d/0x4d0 [ 31.650688] rcu_core+0x8c8/0x2860 [ 31.651008] __do_softirq+0x1b7/0x7d4 [ 31.651382] [ 31.651587] Last potentially related work creation: [ 31.651993] kasan_save_stack+0x22/0x50 [ 31.652381] __kasan_record_aux_stack+0x8e/0xa0 [ 31.652793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.653252] remove_vma+0x139/0x170 [ 31.653569] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.653962] do_vmi_munmap+0x1f1/0x2b0 [ 31.654311] __vm_munmap+0x138/0x3a0 [ 31.654639] __x64_sys_munmap+0x59/0x80 [ 31.654989] do_syscall_64+0x3f/0x90 [ 31.655327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655815] [ 31.655967] The buggy address belongs to the object at ffff888017a0dbc8 [ 31.655967] which belongs to the cache vm_area_struct of size 168 [ 31.657034] The buggy address is located 88 bytes inside of [ 31.657034] freed 168-byte region [ffff888017a0dbc8, ffff888017a0dc70) [ 31.658033] [ 31.658190] The buggy address belongs to the physical page: [ 31.658670] page:00000000fe8c9423 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a0d [ 31.659501] memcg:ffff88801a24df01 [ 31.659799] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.660298] page_type: 0xffffffff() [ 31.660620] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.661307] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a24df01 [ 31.661947] page dumped because: kasan: bad access detected [ 31.662418] [ 31.662575] Memory state around the buggy address: [ 31.662984] ffff888017a0db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.663658] ffff888017a0db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.664252] >ffff888017a0dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.664852] ^ [ 31.665222] ffff888017a0dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.665815] ffff888017a0dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.666416] ================================================================== [ 31.667163] Disabling lock debugging due to kernel taint [ 33.643161] BUG: Bad rss-counter state mm:00000000db61010b type:MM_FILEPAGES val:33 [ 33.644154] BUG: Bad rss-counter state mm:00000000db61010b type:MM_ANONPAGES val:22 [ 34.063744] BUG: Bad rss-counter state mm:000000004917155e type:MM_FILEPAGES val:33 [ 34.064439] BUG: Bad rss-counter state mm:000000004917155e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16167' (ECDSA) to the list of known hosts. 2023/06/20 08:38:41 fuzzer started 2023/06/20 08:38:41 dialing manager at localhost:44161 2023/06/20 08:38:41 checking machine... 2023/06/20 08:38:41 checking revisions... [ 34.553386] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:38:41 testing simple program... [ 34.599920] cgroup: Unknown subsys name 'net' [ 34.643806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:38:40 Registers: info registers vcpu 0 RAX=000000000000000b RBX=0000000000000000 RCX=ffffea000035dd00 RDX=0000000000000000 RSI=ffff88800d774000 RDI=0000000000000130 RBP=ffffffff813782a8 RSP=ffff88806ce09e08 R8 =0000000000000130 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800d774d10 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff88800d774d90 RIP=ffffffff8180c86a RFL=00000212 [----A--] 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=00007ffc04393f68 CR3=0000000019d90000 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=2031343a38333a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a38333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800d7c9098 RBX=ffff88800d7c9068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d7c9098 RBP=ffff88801b9fe570 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801ba09f80 R14=ffffffff818d9dc6 R15=ffff88800c633200 RIP=ffffffff81846359 RFL=00000082 [--S----] 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 00007fbdb9422900 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=00007fbdb99da0b0 CR3=000000000ec96000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000