syzkaller login: [ 41.545931] BUG: Bad rss-counter state mm:000000007bc56b20 type:MM_FILEPAGES val:33 [ 41.547530] BUG: Bad rss-counter state mm:000000007bc56b20 type:MM_ANONPAGES val:22 [ 41.587441] ================================================================== [ 41.587969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.588538] Read of size 8 at addr ffff88800d4c45c8 by task sshd/218 [ 41.588981] [ 41.589103] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.589574] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.590121] Call Trace: [ 41.590299] [ 41.590457] dump_stack_lvl+0x91/0xf0 [ 41.590731] print_report+0xcc/0x620 [ 41.591000] ? __virt_addr_valid+0x102/0x340 [ 41.591309] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.591651] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.591994] kasan_report+0xbe/0xf0 [ 41.592348] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.592696] vma_interval_tree_remove+0xc75/0xec0 [ 41.593031] vma_prepare+0xc54/0x11a0 [ 41.593300] __split_vma+0x5af/0x950 [ 41.593561] ? __pfx___split_vma+0x10/0x10 [ 41.593867] ? find_held_lock+0x2c/0x110 [ 41.594158] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.594535] ? lock_is_held_type+0x9f/0x120 [ 41.594836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.595173] ? mtree_range_walk+0x632/0x900 [ 41.595479] ? mas_walk+0x5c7/0x7c0 [ 41.595743] do_vmi_munmap+0x1f1/0x2b0 [ 41.596016] mmap_region+0x1f9/0x2660 [ 41.596288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.596594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.597014] ? __pfx_lock_acquire+0x10/0x10 [ 41.597325] ? __pfx_mmap_region+0x10/0x10 [ 41.597636] ? security_mmap_addr+0x7d/0xa0 [ 41.597964] ? get_unmapped_area+0x1f5/0x3f0 [ 41.598289] do_mmap+0x854/0xf00 [ 41.598548] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.598837] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.599168] ksys_mmap_pgoff+0x3af/0x500 [ 41.599463] do_syscall_64+0x3f/0x90 [ 41.599742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.600117] RIP: 0033:0x7f8639d25d82 [ 41.600385] 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 [ 41.601625] RSP: 002b:00007ffcd44d8f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.602166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8639d25d82 [ 41.602663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f863915f000 [ 41.603156] RBP: 00007f863915f000 R08: 0000000000000009 R09: 0000000000001000 [ 41.603653] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4ed0ccec0 [ 41.604148] R13: 00007ffcd44d8f20 R14: 00007ffcd44d8f50 R15: 00007ffcd44d92b0 [ 41.604649] [ 41.604823] [ 41.604949] Allocated by task 211: [ 41.605202] kasan_save_stack+0x22/0x50 [ 41.605497] kasan_set_track+0x25/0x30 [ 41.605798] __kasan_slab_alloc+0x59/0x70 [ 41.606107] kmem_cache_alloc+0x16b/0x370 [ 41.606412] vm_area_dup+0x20/0x160 [ 41.606680] __split_vma+0x170/0x950 [ 41.606953] split_vma+0xc6/0x110 [ 41.607209] mprotect_fixup+0x8d2/0xb30 [ 41.607504] do_mprotect_pkey+0x87e/0xd40 [ 41.607810] __x64_sys_mprotect+0x78/0xc0 [ 41.608117] do_syscall_64+0x3f/0x90 [ 41.608392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.608766] [ 41.608892] Freed by task 202: [ 41.609123] kasan_save_stack+0x22/0x50 [ 41.609419] kasan_set_track+0x25/0x30 [ 41.609706] kasan_save_free_info+0x2b/0x50 [ 41.610026] __kasan_slab_free+0x10a/0x190 [ 41.610339] kmem_cache_free+0x10d/0x4d0 [ 41.610636] rcu_core+0x8c8/0x2860 [ 41.610899] __do_softirq+0x1b7/0x7d4 [ 41.611175] [ 41.611302] Last potentially related work creation: [ 41.611645] kasan_save_stack+0x22/0x50 [ 41.611941] __kasan_record_aux_stack+0x8e/0xa0 [ 41.612273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.612648] remove_vma+0x139/0x170 [ 41.612914] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.613240] do_vmi_munmap+0x1f1/0x2b0 [ 41.613523] __vm_munmap+0x138/0x3a0 [ 41.613803] __x64_sys_munmap+0x59/0x80 [ 41.614094] do_syscall_64+0x3f/0x90 [ 41.614370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.614742] [ 41.614869] Second to last potentially related work creation: [ 41.615266] kasan_save_stack+0x22/0x50 [ 41.615558] __kasan_record_aux_stack+0x8e/0xa0 [ 41.615892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.616269] remove_vma+0x139/0x170 [ 41.616534] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.616856] do_vmi_munmap+0x1f1/0x2b0 [ 41.617141] mmap_region+0x1f9/0x2660 [ 41.617419] do_mmap+0x854/0xf00 [ 41.617671] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.617969] ksys_mmap_pgoff+0x3af/0x500 [ 41.618263] do_syscall_64+0x3f/0x90 [ 41.618538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.618912] [ 41.619041] The buggy address belongs to the object at ffff88800d4c4570 [ 41.619041] which belongs to the cache vm_area_struct of size 168 [ 41.619900] The buggy address is located 88 bytes inside of [ 41.619900] freed 168-byte region [ffff88800d4c4570, ffff88800d4c4618) [ 41.620714] [ 41.620842] The buggy address belongs to the physical page: [ 41.621226] page:0000000096ec1c7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4c4 [ 41.621855] memcg:ffff88800c9d3a01 [ 41.622107] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.622483] page_type: 0xffffffff() [ 41.622748] raw: 0100000000000200 ffff88800879fc80 ffffea0000383000 dead000000000008 [ 41.623283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9d3a01 [ 41.623811] page dumped because: kasan: bad access detected [ 41.624197] [ 41.624324] Memory state around the buggy address: [ 41.624660] ffff88800d4c4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.625162] ffff88800d4c4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 41.625664] >ffff88800d4c4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.626170] ^ [ 41.626560] ffff88800d4c4600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 41.627056] ffff88800d4c4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.627551] ================================================================== [ 41.628114] Disabling lock debugging due to kernel taint [ 43.580994] BUG: Bad rss-counter state mm:0000000033acfd77 type:MM_FILEPAGES val:33 [ 43.582177] BUG: Bad rss-counter state mm:0000000033acfd77 type:MM_ANONPAGES val:22 [ 44.058081] BUG: Bad rss-counter state mm:000000004ab103a2 type:MM_FILEPAGES val:33 [ 44.059129] BUG: Bad rss-counter state mm:000000004ab103a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16664' (ECDSA) to the list of known hosts. 2023/06/19 21:57:42 fuzzer started 2023/06/19 21:57:43 dialing manager at localhost:44161 2023/06/19 21:57:43 checking machine... 2023/06/19 21:57:43 checking revisions... [ 44.796272] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:57:43 testing simple program... [ 44.856347] cgroup: Unknown subsys name 'net' [ 44.951844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003380f7b RCX=0000000000000000 RDX=ffff888015868000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888019c07bd0 R8 =0000000000000007 R9 =0000000000000400 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff888019c07e60 R14=ffff888019c07cf8 R15=ffff888019c07cd8 RIP=ffffffff814c0384 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 00007f05ba3a4900 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=00007f05ba95b618 CR3=000000000ec20000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f129ac0c030 CR3=000000000c5ba000 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=aa1e50bbe501e3a2c047ca155fccad9f XMM02=000000000011cee0eff9b2d0a8fce9cb XMM03=000000000011cfb02c67c8bc2e329bc3 XMM04=f402548b0dbceedd00000000000ae988 XMM05=751b9502027dc0b90000000000134530 XMM06=1bdcb34acf39f5bb0000000000133708 XMM07=e042d86d42eb936e0000000000123b90 XMM08=9c487ec1464a0760000000000011cfb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000