syzkaller login: [ 41.156299] BUG: Bad rss-counter state mm:0000000044a21d7b type:MM_FILEPAGES val:33 [ 41.157792] BUG: Bad rss-counter state mm:0000000044a21d7b type:MM_ANONPAGES val:22 [ 41.291848] ================================================================== [ 41.292921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.294050] Read of size 8 at addr ffff88801863f228 by task sshd/218 [ 41.295184] [ 41.295452] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.296518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.297708] Call Trace: [ 41.298105] [ 41.298466] dump_stack_lvl+0x91/0xf0 [ 41.299088] print_report+0xcc/0x620 [ 41.299748] ? __virt_addr_valid+0x102/0x340 [ 41.300368] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.300984] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.301597] kasan_report+0xbe/0xf0 [ 41.302070] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.302695] vma_interval_tree_remove+0xc75/0xec0 [ 41.303300] vma_prepare+0xc54/0x11a0 [ 41.303788] __split_vma+0x5af/0x950 [ 41.304265] ? __pfx___split_vma+0x10/0x10 [ 41.304791] ? find_held_lock+0x2c/0x110 [ 41.305313] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.305873] ? lock_is_held_type+0x9f/0x120 [ 41.306425] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.307023] ? mtree_range_walk+0x632/0x900 [ 41.307571] ? mas_walk+0x5c7/0x7c0 [ 41.308062] do_vmi_munmap+0x1f1/0x2b0 [ 41.308553] mmap_region+0x1f9/0x2660 [ 41.309031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.309545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.310274] ? __pfx_lock_acquire+0x10/0x10 [ 41.310799] ? __pfx_mmap_region+0x10/0x10 [ 41.311332] ? security_mmap_addr+0x7d/0xa0 [ 41.311878] ? get_unmapped_area+0x1f5/0x3f0 [ 41.312435] do_mmap+0x854/0xf00 [ 41.312872] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.313372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.313930] ksys_mmap_pgoff+0x3af/0x500 [ 41.314437] do_syscall_64+0x3f/0x90 [ 41.314911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.315547] RIP: 0033:0x7fef64740d82 [ 41.316012] 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 [ 41.318118] RSP: 002b:00007fff7bd649c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.319010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef64740d82 [ 41.319855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef63b7a000 [ 41.320692] RBP: 00007fef63b7a000 R08: 0000000000000009 R09: 0000000000001000 [ 41.321537] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577d8026ec0 [ 41.322381] R13: 00007fff7bd649e0 R14: 00007fff7bd64a10 R15: 00007fff7bd64d70 [ 41.323236] [ 41.323522] [ 41.323752] Allocated by task 211: [ 41.324174] kasan_save_stack+0x22/0x50 [ 41.324674] kasan_set_track+0x25/0x30 [ 41.325168] __kasan_slab_alloc+0x59/0x70 [ 41.325687] kmem_cache_alloc+0x16b/0x370 [ 41.326204] vm_area_dup+0x20/0x160 [ 41.326659] __split_vma+0x170/0x950 [ 41.327117] split_vma+0xc6/0x110 [ 41.327554] mprotect_fixup+0x8d2/0xb30 [ 41.328063] do_mprotect_pkey+0x87e/0xd40 [ 41.328588] __x64_sys_mprotect+0x78/0xc0 [ 41.329106] do_syscall_64+0x3f/0x90 [ 41.329576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.330211] [ 41.330427] Freed by task 211: [ 41.330811] kasan_save_stack+0x22/0x50 [ 41.331306] kasan_set_track+0x25/0x30 [ 41.331814] kasan_save_free_info+0x2b/0x50 [ 41.332342] __kasan_slab_free+0x10a/0x190 [ 41.332867] kmem_cache_free+0x10d/0x4d0 [ 41.333409] rcu_core+0x8c8/0x2860 [ 41.333864] __do_softirq+0x1b7/0x7d4 [ 41.334340] [ 41.334555] Last potentially related work creation: [ 41.335137] kasan_save_stack+0x22/0x50 [ 41.335660] __kasan_record_aux_stack+0x8e/0xa0 [ 41.336245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.336890] remove_vma+0x139/0x170 [ 41.337346] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.337903] do_vmi_munmap+0x1f1/0x2b0 [ 41.338388] __vm_munmap+0x138/0x3a0 [ 41.338866] __x64_sys_munmap+0x59/0x80 [ 41.339379] do_syscall_64+0x3f/0x90 [ 41.339863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.340519] [ 41.340738] The buggy address belongs to the object at ffff88801863f1d0 [ 41.340738] which belongs to the cache vm_area_struct of size 168 [ 41.342215] The buggy address is located 88 bytes inside of [ 41.342215] freed 168-byte region [ffff88801863f1d0, ffff88801863f278) [ 41.343657] [ 41.343895] The buggy address belongs to the physical page: [ 41.344563] page:00000000af3d8cc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1863f [ 41.345677] memcg:ffff88800fce7f01 [ 41.346099] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.346802] page_type: 0xffffffff() [ 41.347264] raw: 0100000000000200 ffff88800879fc80 ffffea000051fe40 0000000000000003 [ 41.348197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fce7f01 [ 41.349100] page dumped because: kasan: bad access detected [ 41.349758] [ 41.349976] Memory state around the buggy address: [ 41.350562] ffff88801863f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.351416] ffff88801863f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.352277] >ffff88801863f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.353125] ^ [ 41.353685] ffff88801863f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.354556] ffff88801863f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.355423] ================================================================== [ 41.356607] Disabling lock debugging due to kernel taint [ 43.161173] BUG: Bad rss-counter state mm:00000000e3063d10 type:MM_FILEPAGES val:33 [ 43.162347] BUG: Bad rss-counter state mm:00000000e3063d10 type:MM_ANONPAGES val:22 [ 43.589255] BUG: Bad rss-counter state mm:000000009fdc55d2 type:MM_FILEPAGES val:31 [ 43.590413] BUG: Bad rss-counter state mm:000000009fdc55d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10394' (ECDSA) to the list of known hosts. 2023/06/19 19:15:31 fuzzer started 2023/06/19 19:15:31 dialing manager at localhost:44161 2023/06/19 19:15:31 checking machine... 2023/06/19 19:15:31 checking revisions... [ 44.254396] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:15:31 testing simple program... [ 44.299813] cgroup: Unknown subsys name 'net' [ 44.345060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85e039c4 RCX=ffffffff8186bab7 RDX=0000000000000000 RSI=ffffffff86141c90 RDI=ffffffff85e039ac RBP=ffffffff85e039c8 RSP=ffff8880186df6e8 R8 =ffffffff86141c90 R9 =ffff8880186df7e0 R10=0000000000038001 R11=0000000000022976 R12=ffffffff85e039c8 R13=ffffffff85e039ac R14=ffffffff85e039c4 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000256 [---ZAP-] 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 00007f7b8f224900 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=00007f7b8f7d9650 CR3=000000000ed04000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003533c33 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001b63233 RSI=ffff88800db19198 RDI=ffff88800de46b20 RBP=ffff88800de46b18 RSP=ffff88806cf09d98 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88801a99e198 R13=fffffbfff0f70df0 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc473 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 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=00007ffea6383358 CR3=0000000019f4e000 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=2031333a35313a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a35313a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000