syzkaller login: [ 30.662336] BUG: Bad rss-counter state mm:00000000ecccf9e9 type:MM_FILEPAGES val:33 [ 30.663801] BUG: Bad rss-counter state mm:00000000ecccf9e9 type:MM_ANONPAGES val:22 [ 30.814449] ================================================================== [ 30.815508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.816621] Read of size 8 at addr ffff88800dd6adf0 by task sshd/221 [ 30.817695] [ 30.817919] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.818791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.819791] Call Trace: [ 30.820111] [ 30.820398] dump_stack_lvl+0x91/0xf0 [ 30.820900] print_report+0xcc/0x620 [ 30.821387] ? __virt_addr_valid+0x102/0x340 [ 30.821944] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.822576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.823195] kasan_report+0xbe/0xf0 [ 30.823685] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.824308] vma_interval_tree_remove+0xc75/0xec0 [ 30.824926] vma_prepare+0xc54/0x11a0 [ 30.825409] __split_vma+0x5af/0x950 [ 30.825893] ? __pfx___split_vma+0x10/0x10 [ 30.826430] ? find_held_lock+0x2c/0x110 [ 30.826957] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.827532] ? lock_is_held_type+0x9f/0x120 [ 30.828075] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.828689] ? mtree_range_walk+0x632/0x900 [ 30.829277] ? mas_walk+0x5c7/0x7c0 [ 30.829757] do_vmi_munmap+0x1f1/0x2b0 [ 30.830258] mmap_region+0x1f9/0x2660 [ 30.830747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.831265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.831993] ? __pfx_lock_acquire+0x10/0x10 [ 30.832524] ? __pfx_mmap_region+0x10/0x10 [ 30.833070] ? security_mmap_addr+0x7d/0xa0 [ 30.833615] ? get_unmapped_area+0x1f5/0x3f0 [ 30.834172] do_mmap+0x854/0xf00 [ 30.834616] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.835116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.835690] ksys_mmap_pgoff+0x3af/0x500 [ 30.836201] do_syscall_64+0x3f/0x90 [ 30.836685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837356] RIP: 0033:0x7fde1428fd82 [ 30.837814] 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 [ 30.839946] RSP: 002b:00007ffcb21a7c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.840873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde1428fd82 [ 30.841735] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde136c9000 [ 30.842595] RBP: 00007fde136c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.843453] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558da0438ec0 [ 30.844309] R13: 00007ffcb21a7ca0 R14: 00007ffcb21a7cd0 R15: 00007ffcb21a8030 [ 30.845181] [ 30.845475] [ 30.845689] Allocated by task 214: [ 30.846126] kasan_save_stack+0x22/0x50 [ 30.846640] kasan_set_track+0x25/0x30 [ 30.847131] __kasan_slab_alloc+0x59/0x70 [ 30.847660] kmem_cache_alloc+0x16b/0x370 [ 30.848174] vm_area_dup+0x20/0x160 [ 30.848634] __split_vma+0x170/0x950 [ 30.849134] split_vma+0xc6/0x110 [ 30.849583] mprotect_fixup+0x8d2/0xb30 [ 30.850094] do_mprotect_pkey+0x87e/0xd40 [ 30.850618] __x64_sys_mprotect+0x78/0xc0 [ 30.851148] do_syscall_64+0x3f/0x90 [ 30.851626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852273] [ 30.852493] Freed by task 214: [ 30.852894] kasan_save_stack+0x22/0x50 [ 30.853398] kasan_set_track+0x25/0x30 [ 30.853895] kasan_save_free_info+0x2b/0x50 [ 30.854436] __kasan_slab_free+0x10a/0x190 [ 30.854975] kmem_cache_free+0x10d/0x4d0 [ 30.855488] rcu_core+0x8c8/0x2860 [ 30.855935] __do_softirq+0x1b7/0x7d4 [ 30.856417] [ 30.856635] Last potentially related work creation: [ 30.857228] kasan_save_stack+0x22/0x50 [ 30.857732] __kasan_record_aux_stack+0x8e/0xa0 [ 30.858303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.858943] remove_vma+0x139/0x170 [ 30.859401] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.859959] do_vmi_munmap+0x1f1/0x2b0 [ 30.860456] __vm_munmap+0x138/0x3a0 [ 30.860951] __x64_sys_munmap+0x59/0x80 [ 30.861454] do_syscall_64+0x3f/0x90 [ 30.861939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862600] [ 30.862824] The buggy address belongs to the object at ffff88800dd6ad98 [ 30.862824] which belongs to the cache vm_area_struct of size 168 [ 30.864325] The buggy address is located 88 bytes inside of [ 30.864325] freed 168-byte region [ffff88800dd6ad98, ffff88800dd6ae40) [ 30.865780] [ 30.866005] The buggy address belongs to the physical page: [ 30.866669] page:000000005ff1b786 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd6a [ 30.867757] memcg:ffff88800c680901 [ 30.868187] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.868849] page_type: 0xffffffff() [ 30.869302] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.870220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c680901 [ 30.871130] page dumped because: kasan: bad access detected [ 30.871793] [ 30.872011] Memory state around the buggy address: [ 30.872587] ffff88800dd6ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.873470] ffff88800dd6ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.874321] >ffff88800dd6ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.875167] ^ [ 30.875975] ffff88800dd6ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.876850] ffff88800dd6ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.877706] ================================================================== [ 30.878951] Disabling lock debugging due to kernel taint [ 32.793098] BUG: Bad rss-counter state mm:000000004e4d2969 type:MM_FILEPAGES val:33 [ 32.794097] BUG: Bad rss-counter state mm:000000004e4d2969 type:MM_ANONPAGES val:22 [ 33.344811] BUG: Bad rss-counter state mm:00000000df74a9a6 type:MM_FILEPAGES val:33 [ 33.346020] BUG: Bad rss-counter state mm:00000000df74a9a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63947' (ECDSA) to the list of known hosts. 2023/06/21 03:29:59 fuzzer started 2023/06/21 03:29:59 dialing manager at localhost:36067 2023/06/21 03:29:59 checking machine... 2023/06/21 03:29:59 checking revisions... [ 33.987232] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:29:59 testing simple program... [ 34.031379] cgroup: Unknown subsys name 'net' [ 34.088394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:58 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=ffff88800ccfa800 RCX=ffffffff844dad93 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce2c250 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=dffffc0000000000 R13=00000007b4f92d40 R14=0000000000000001 R15=ffff88800ccfa810 RIP=ffffffff814c0250 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 00007fe5cbb62900 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=00007fe5cc11a0b0 CR3=000000001a844000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007ffe22307b08 CR3=000000000eba0000 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=2038353a39323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000