syzkaller login: [ 30.474807] BUG: Bad rss-counter state mm:0000000022278ec7 type:MM_FILEPAGES val:33 [ 30.475568] BUG: Bad rss-counter state mm:0000000022278ec7 type:MM_ANONPAGES val:22 [ 30.611900] ================================================================== [ 30.612692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.613464] Read of size 8 at addr ffff888019e76d08 by task sshd/219 [ 30.614106] [ 30.614287] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.615007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.615905] Call Trace: [ 30.616166] [ 30.616403] dump_stack_lvl+0x91/0xf0 [ 30.616813] print_report+0xcc/0x620 [ 30.617208] ? __virt_addr_valid+0x102/0x340 [ 30.617660] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618196] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.618701] kasan_report+0xbe/0xf0 [ 30.619091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.619604] vma_interval_tree_remove+0xc75/0xec0 [ 30.620096] vma_prepare+0xc54/0x11a0 [ 30.620488] __split_vma+0x5af/0x950 [ 30.620881] ? __pfx___split_vma+0x10/0x10 [ 30.621316] ? find_held_lock+0x2c/0x110 [ 30.621748] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.622221] ? lock_is_held_type+0x9f/0x120 [ 30.622667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.623167] ? mtree_range_walk+0x632/0x900 [ 30.623619] ? mas_walk+0x5c7/0x7c0 [ 30.624011] do_vmi_munmap+0x1f1/0x2b0 [ 30.624419] mmap_region+0x1f9/0x2660 [ 30.624813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.625240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.625827] ? __pfx_lock_acquire+0x10/0x10 [ 30.626282] ? __pfx_mmap_region+0x10/0x10 [ 30.626718] ? security_mmap_addr+0x7d/0xa0 [ 30.627157] ? get_unmapped_area+0x1f5/0x3f0 [ 30.627607] do_mmap+0x854/0xf00 [ 30.627970] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.628377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.628836] ksys_mmap_pgoff+0x3af/0x500 [ 30.629250] do_syscall_64+0x3f/0x90 [ 30.629643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630179] RIP: 0033:0x7f550f9c8d82 [ 30.630553] 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 [ 30.632306] RSP: 002b:00007ffdcab48798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.633049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f550f9c8d82 [ 30.633742] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f550ee02000 [ 30.634447] RBP: 00007f550ee02000 R08: 0000000000000009 R09: 0000000000001000 [ 30.635140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8e5054b20 [ 30.635837] R13: 00007ffdcab487b0 R14: 00007ffdcab487e0 R15: 00007ffdcab48b40 [ 30.636538] [ 30.636779] [ 30.636956] Allocated by task 212: [ 30.637311] kasan_save_stack+0x22/0x50 [ 30.637722] kasan_set_track+0x25/0x30 [ 30.638144] __kasan_slab_alloc+0x59/0x70 [ 30.638573] kmem_cache_alloc+0x16b/0x370 [ 30.638996] vm_area_dup+0x20/0x160 [ 30.639374] __split_vma+0x170/0x950 [ 30.639757] split_vma+0xc6/0x110 [ 30.640115] mprotect_fixup+0x8d2/0xb30 [ 30.640528] do_mprotect_pkey+0x87e/0xd40 [ 30.640953] __x64_sys_mprotect+0x78/0xc0 [ 30.641379] do_syscall_64+0x3f/0x90 [ 30.641768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642301] [ 30.642479] Freed by task 212: [ 30.642801] kasan_save_stack+0x22/0x50 [ 30.643212] kasan_set_track+0x25/0x30 [ 30.643616] kasan_save_free_info+0x2b/0x50 [ 30.644054] __kasan_slab_free+0x10a/0x190 [ 30.644494] kmem_cache_free+0x10d/0x4d0 [ 30.644914] rcu_core+0x8c8/0x2860 [ 30.645280] __do_softirq+0x1b7/0x7d4 [ 30.645668] [ 30.645843] Last potentially related work creation: [ 30.646346] kasan_save_stack+0x22/0x50 [ 30.646759] __kasan_record_aux_stack+0x8e/0xa0 [ 30.647232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.647760] remove_vma+0x139/0x170 [ 30.648131] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.648585] do_vmi_munmap+0x1f1/0x2b0 [ 30.648988] __vm_munmap+0x138/0x3a0 [ 30.649370] __x64_sys_munmap+0x59/0x80 [ 30.649777] do_syscall_64+0x3f/0x90 [ 30.650176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.650705] [ 30.650885] The buggy address belongs to the object at ffff888019e76cb0 [ 30.650885] which belongs to the cache vm_area_struct of size 168 [ 30.652093] The buggy address is located 88 bytes inside of [ 30.652093] freed 168-byte region [ffff888019e76cb0, ffff888019e76d58) [ 30.653252] [ 30.653426] The buggy address belongs to the physical page: [ 30.653970] page:000000004968ec3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e76 [ 30.654862] memcg:ffff888014718a01 [ 30.655211] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.655740] page_type: 0xffffffff() [ 30.656107] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.656865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014718a01 [ 30.657607] page dumped because: kasan: bad access detected [ 30.658159] [ 30.658336] Memory state around the buggy address: [ 30.658810] ffff888019e76c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.659518] ffff888019e76c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.660214] >ffff888019e76d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.660918] ^ [ 30.661276] ffff888019e76d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.661981] ffff888019e76e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.662678] ================================================================== [ 30.663576] Disabling lock debugging due to kernel taint [ 32.605093] BUG: Bad rss-counter state mm:00000000eb75c9bd type:MM_FILEPAGES val:33 [ 32.606279] BUG: Bad rss-counter state mm:00000000eb75c9bd type:MM_ANONPAGES val:22 [ 32.999990] BUG: Bad rss-counter state mm:00000000d9dd1506 type:MM_FILEPAGES val:33 [ 33.001054] BUG: Bad rss-counter state mm:00000000d9dd1506 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59217' (ECDSA) to the list of known hosts. 2023/06/21 07:51:00 fuzzer started 2023/06/21 07:51:00 dialing manager at localhost:36067 2023/06/21 07:51:00 checking machine... 2023/06/21 07:51:00 checking revisions... [ 33.714973] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:51:00 testing simple program... [ 33.765464] cgroup: Unknown subsys name 'net' [ 33.808225] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:00 Registers: info registers vcpu 0 RAX=ffffffff863b3571 RBX=0000000000000001 RCX=ffffffff863b356c RDX=dffffc0000000000 RSI=ffffffff863b3570 RDI=ffffffff863b3571 RBP=ffff88801cd4f880 RSP=ffff88801cd4f7b8 R8 =ffffffff863b3570 R9 =ffff88801cd4f868 R10=0000000000038001 R11=000000000008a966 R12=ffff88801cd4f888 R13=ffff88801cd4f870 R14=ffff88801cd4f869 R15=ffff88801cd4f828 RIP=ffffffff81130a98 RFL=00000202 [-------] 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 00007f5be1eb6900 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=00007f5be246b650 CR3=000000000d896000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffca3efdc38 CR3=0000000005482000 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=00007f6a4cd495100000561e8bad9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000