syzkaller login: [ 35.570816] BUG: Bad rss-counter state mm:000000004ee9f3dc type:MM_FILEPAGES val:33 [ 35.571916] BUG: Bad rss-counter state mm:000000004ee9f3dc type:MM_ANONPAGES val:22 [ 35.614513] ================================================================== [ 35.615513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.616711] Read of size 8 at addr ffff88800e8b1ed8 by task sshd/220 [ 35.617480] [ 35.617699] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.618609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.619577] Call Trace: [ 35.619900] [ 35.620190] dump_stack_lvl+0x91/0xf0 [ 35.620693] print_report+0xcc/0x620 [ 35.621178] ? __virt_addr_valid+0x102/0x340 [ 35.621733] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.622349] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.622972] kasan_report+0xbe/0xf0 [ 35.623454] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.624110] vma_interval_tree_remove+0xc75/0xec0 [ 35.624732] vma_prepare+0xc54/0x11a0 [ 35.625216] __split_vma+0x5af/0x950 [ 35.625692] ? __pfx___split_vma+0x10/0x10 [ 35.626223] ? find_held_lock+0x2c/0x110 [ 35.626772] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.627362] ? lock_is_held_type+0x9f/0x120 [ 35.627931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.628559] ? mtree_range_walk+0x632/0x900 [ 35.629144] ? mas_walk+0x5c7/0x7c0 [ 35.629650] do_vmi_munmap+0x1f1/0x2b0 [ 35.630165] mmap_region+0x1f9/0x2660 [ 35.630684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.631214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.631962] ? __pfx_lock_acquire+0x10/0x10 [ 35.632557] ? __pfx_mmap_region+0x10/0x10 [ 35.633271] ? security_mmap_addr+0x7d/0xa0 [ 35.633907] ? get_unmapped_area+0x1f5/0x3f0 [ 35.634493] do_mmap+0x854/0xf00 [ 35.634992] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.635526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.636134] ksys_mmap_pgoff+0x3af/0x500 [ 35.636681] do_syscall_64+0x3f/0x90 [ 35.637205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.637912] RIP: 0033:0x7f7319051d82 [ 35.638404] 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 [ 35.640698] RSP: 002b:00007ffde0a15498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.641672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7319051d82 [ 35.642599] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f731848b000 [ 35.643587] RBP: 00007f731848b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.644583] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae83c35ec0 [ 35.645585] R13: 00007ffde0a154b0 R14: 00007ffde0a154e0 R15: 00007ffde0a15840 [ 35.646613] [ 35.646951] [ 35.647200] Allocated by task 213: [ 35.647691] kasan_save_stack+0x22/0x50 [ 35.648273] kasan_set_track+0x25/0x30 [ 35.648846] __kasan_slab_alloc+0x59/0x70 [ 35.649457] kmem_cache_alloc+0x16b/0x370 [ 35.650053] vm_area_dup+0x20/0x160 [ 35.650576] __split_vma+0x170/0x950 [ 35.651111] split_vma+0xc6/0x110 [ 35.651610] mprotect_fixup+0x8d2/0xb30 [ 35.652189] do_mprotect_pkey+0x87e/0xd40 [ 35.652781] __x64_sys_mprotect+0x78/0xc0 [ 35.653379] do_syscall_64+0x3f/0x90 [ 35.653922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.654686] [ 35.654932] Freed by task 213: [ 35.655384] kasan_save_stack+0x22/0x50 [ 35.655965] kasan_set_track+0x25/0x30 [ 35.656530] kasan_save_free_info+0x2b/0x50 [ 35.657153] __kasan_slab_free+0x10a/0x190 [ 35.657768] kmem_cache_free+0x10d/0x4d0 [ 35.658349] rcu_core+0x8c8/0x2860 [ 35.658873] __do_softirq+0x1b7/0x7d4 [ 35.659429] [ 35.659671] Last potentially related work creation: [ 35.660357] kasan_save_stack+0x22/0x50 [ 35.660933] __kasan_record_aux_stack+0x8e/0xa0 [ 35.661593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.662348] remove_vma+0x139/0x170 [ 35.662877] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.663524] do_vmi_munmap+0x1f1/0x2b0 [ 35.664085] __vm_munmap+0x138/0x3a0 [ 35.664626] __x64_sys_munmap+0x59/0x80 [ 35.665192] do_syscall_64+0x3f/0x90 [ 35.665747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.666496] [ 35.666763] Second to last potentially related work creation: [ 35.667549] kasan_save_stack+0x22/0x50 [ 35.668122] __kasan_record_aux_stack+0x8e/0xa0 [ 35.668800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.669541] remove_vma+0x139/0x170 [ 35.670076] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.670726] do_vmi_munmap+0x1f1/0x2b0 [ 35.671295] mmap_region+0x1f9/0x2660 [ 35.671851] do_mmap+0x854/0xf00 [ 35.672338] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.672909] ksys_mmap_pgoff+0x3af/0x500 [ 35.673490] do_syscall_64+0x3f/0x90 [ 35.674049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.674809] [ 35.675060] The buggy address belongs to the object at ffff88800e8b1e80 [ 35.675060] which belongs to the cache vm_area_struct of size 168 [ 35.676773] The buggy address is located 88 bytes inside of [ 35.676773] freed 168-byte region [ffff88800e8b1e80, ffff88800e8b1f28) [ 35.678430] [ 35.678691] The buggy address belongs to the physical page: [ 35.679459] page:00000000e0061a7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8b1 [ 35.680758] memcg:ffff88800f545f01 [ 35.681246] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.682055] page_type: 0xffffffff() [ 35.682600] raw: 0100000000000200 ffff8880087a0c80 ffffea0000335a40 dead000000000005 [ 35.683670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f545f01 [ 35.684736] page dumped because: kasan: bad access detected [ 35.685514] [ 35.685760] Memory state around the buggy address: [ 35.686432] ffff88800e8b1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.687440] ffff88800e8b1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.688464] >ffff88800e8b1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.689482] ^ [ 35.690323] ffff88800e8b1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.691330] ffff88800e8b1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.692327] ================================================================== [ 35.693550] Disabling lock debugging due to kernel taint [ 38.392487] BUG: Bad rss-counter state mm:00000000094488e9 type:MM_FILEPAGES val:33 [ 38.393748] BUG: Bad rss-counter state mm:00000000094488e9 type:MM_ANONPAGES val:22 [ 38.880744] BUG: Bad rss-counter state mm:00000000a48d3849 type:MM_FILEPAGES val:33 [ 38.882125] BUG: Bad rss-counter state mm:00000000a48d3849 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26788' (ECDSA) to the list of known hosts. 2023/06/21 00:02:33 fuzzer started 2023/06/21 00:02:34 dialing manager at localhost:36067 2023/06/21 00:02:34 checking machine... 2023/06/21 00:02:34 checking revisions... [ 39.562517] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:02:34 testing simple program... [ 39.610405] cgroup: Unknown subsys name 'net' [ 39.667898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:02:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800de26600 RCX=0000000000000100 RDX=ffff88800fcd3680 RSI=ffffffff81213593 RDI=ffff88800fcd3e28 RBP=ffff88800fcd3680 RSP=ffff88806ce09dd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888015d39400 R13=ffff888015d38028 R14=ffff88806ce35000 R15=ffff888015d394d8 RIP=ffffffff814c0891 RFL=00000206 [-----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 00007f4e5aa09900 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=00007f4e5afc10b0 CR3=000000000ca12000 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=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 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=ffff888008c04400 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=00007f1fa184c070 CR3=0000000015c2e000 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=2033333a32303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a32303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000