syzkaller login: [ 33.561736] BUG: Bad rss-counter state mm:000000007457d651 type:MM_FILEPAGES val:33 [ 33.562291] BUG: Bad rss-counter state mm:000000007457d651 type:MM_ANONPAGES val:22 [ 33.668731] ================================================================== [ 33.669265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.669828] Read of size 8 at addr ffff88800b3e9140 by task sshd/221 [ 33.670288] [ 33.670417] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.670929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.671533] Call Trace: [ 33.671725] [ 33.671891] dump_stack_lvl+0x91/0xf0 [ 33.672185] print_report+0xcc/0x620 [ 33.672475] ? __virt_addr_valid+0x102/0x340 [ 33.672803] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.673166] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.673511] kasan_report+0xbe/0xf0 [ 33.673779] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.674224] vma_interval_tree_remove+0xc75/0xec0 [ 33.674565] vma_prepare+0xc54/0x11a0 [ 33.674833] __split_vma+0x5af/0x950 [ 33.675095] ? __pfx___split_vma+0x10/0x10 [ 33.675400] ? find_held_lock+0x2c/0x110 [ 33.675698] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.676020] ? lock_is_held_type+0x9f/0x120 [ 33.676320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.676661] ? mtree_range_walk+0x632/0x900 [ 33.676969] ? mas_walk+0x5c7/0x7c0 [ 33.677233] do_vmi_munmap+0x1f1/0x2b0 [ 33.677505] mmap_region+0x1f9/0x2660 [ 33.677771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.678061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.678497] ? __pfx_lock_acquire+0x10/0x10 [ 33.678818] ? __pfx_mmap_region+0x10/0x10 [ 33.679130] ? security_mmap_addr+0x7d/0xa0 [ 33.679455] ? get_unmapped_area+0x1f5/0x3f0 [ 33.679780] do_mmap+0x854/0xf00 [ 33.680038] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.680336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.680665] ksys_mmap_pgoff+0x3af/0x500 [ 33.680965] do_syscall_64+0x3f/0x90 [ 33.681245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.681627] RIP: 0033:0x7f17d487ad82 [ 33.681901] 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 [ 33.683213] RSP: 002b:00007ffda0beba08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.683778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17d487ad82 [ 33.684288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17d3cb4000 [ 33.684803] RBP: 00007f17d3cb4000 R08: 0000000000000009 R09: 0000000000001000 [ 33.685326] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2ce5a8ec0 [ 33.685832] R13: 00007ffda0beba20 R14: 00007ffda0beba50 R15: 00007ffda0bebdb0 [ 33.686349] [ 33.686525] [ 33.686655] Allocated by task 214: [ 33.686906] kasan_save_stack+0x22/0x50 [ 33.687203] kasan_set_track+0x25/0x30 [ 33.687503] __kasan_slab_alloc+0x59/0x70 [ 33.687812] kmem_cache_alloc+0x16b/0x370 [ 33.688120] vm_area_dup+0x20/0x160 [ 33.688388] __split_vma+0x170/0x950 [ 33.688658] split_vma+0xc6/0x110 [ 33.688923] mprotect_fixup+0x8d2/0xb30 [ 33.689226] do_mprotect_pkey+0x87e/0xd40 [ 33.689542] __x64_sys_mprotect+0x78/0xc0 [ 33.689857] do_syscall_64+0x3f/0x90 [ 33.690141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.690523] [ 33.690651] Freed by task 214: [ 33.690883] kasan_save_stack+0x22/0x50 [ 33.691180] kasan_set_track+0x25/0x30 [ 33.691482] kasan_save_free_info+0x2b/0x50 [ 33.691794] __kasan_slab_free+0x10a/0x190 [ 33.692112] kmem_cache_free+0x10d/0x4d0 [ 33.692420] rcu_core+0x8c8/0x2860 [ 33.692678] __do_softirq+0x1b7/0x7d4 [ 33.692957] [ 33.693083] Last potentially related work creation: [ 33.693437] kasan_save_stack+0x22/0x50 [ 33.693741] __kasan_record_aux_stack+0x8e/0xa0 [ 33.694084] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.694469] remove_vma+0x139/0x170 [ 33.694742] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.695071] do_vmi_munmap+0x1f1/0x2b0 [ 33.695369] __vm_munmap+0x138/0x3a0 [ 33.695641] __x64_sys_munmap+0x59/0x80 [ 33.695932] do_syscall_64+0x3f/0x90 [ 33.696221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.696596] [ 33.696724] Second to last potentially related work creation: [ 33.697136] kasan_save_stack+0x22/0x50 [ 33.697437] __kasan_record_aux_stack+0x8e/0xa0 [ 33.697772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.698156] remove_vma+0x139/0x170 [ 33.698422] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.698756] do_vmi_munmap+0x1f1/0x2b0 [ 33.699049] mmap_region+0x1f9/0x2660 [ 33.699335] do_mmap+0x854/0xf00 [ 33.699588] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.699879] ksys_mmap_pgoff+0x3af/0x500 [ 33.700177] do_syscall_64+0x3f/0x90 [ 33.700459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.700839] [ 33.700966] The buggy address belongs to the object at ffff88800b3e90e8 [ 33.700966] which belongs to the cache vm_area_struct of size 168 [ 33.701857] The buggy address is located 88 bytes inside of [ 33.701857] freed 168-byte region [ffff88800b3e90e8, ffff88800b3e9190) [ 33.702698] [ 33.702823] The buggy address belongs to the physical page: [ 33.703212] page:0000000059f645e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3e9 [ 33.703852] memcg:ffff88800c4f6d01 [ 33.704103] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.704488] page_type: 0xffffffff() [ 33.704754] raw: 0100000000000200 ffff88800879fc80 ffffea00003aac80 dead000000000002 [ 33.705303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4f6d01 [ 33.705840] page dumped because: kasan: bad access detected [ 33.706239] [ 33.706363] Memory state around the buggy address: [ 33.706710] ffff88800b3e9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.707214] ffff88800b3e9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.707729] >ffff88800b3e9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.708238] ^ [ 33.708624] ffff88800b3e9180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 33.709128] ffff88800b3e9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.709629] ================================================================== [ 33.710202] Disabling lock debugging due to kernel taint [ 35.950564] BUG: Bad rss-counter state mm:0000000072a264fa type:MM_FILEPAGES val:33 [ 35.952309] BUG: Bad rss-counter state mm:0000000072a264fa type:MM_ANONPAGES val:22 [ 36.551296] BUG: Bad rss-counter state mm:00000000e21968df type:MM_FILEPAGES val:33 [ 36.552460] BUG: Bad rss-counter state mm:00000000e21968df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33484' (ECDSA) to the list of known hosts. 2023/06/20 04:53:34 fuzzer started 2023/06/20 04:53:34 dialing manager at localhost:44161 2023/06/20 04:53:34 checking machine... 2023/06/20 04:53:34 checking revisions... [ 37.213871] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:35 testing simple program... [ 37.256906] cgroup: Unknown subsys name 'net' [ 37.290397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:32 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=ffff888008c58000 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=00007fdd50612650 CR3=000000000e306000 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=2034333a33353a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f2418c4d320 CR3=0000000009666000 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=00000000000000000000000000000000 XMM01=2f1bccece36c64b52f44f573218334eb XMM02=ec2efd57dc4c00df000000000011d0c8 XMM03=2d06664ce44327b9000000000011d198 XMM04=f6e8b67e164d7c1c00000000000ae988 XMM05=2a81ef11b182f0750000000000135280 XMM06=c291bd5c70af25b90000000000134f08 XMM07=e042d86d42eb936e0000000000124450 XMM08=2d06664ce44327b9000000000011d198 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000