syzkaller login: [ 35.666204] BUG: Bad rss-counter state mm:00000000b1153f1d type:MM_FILEPAGES val:33 [ 35.667229] BUG: Bad rss-counter state mm:00000000b1153f1d type:MM_ANONPAGES val:22 [ 35.831769] ================================================================== [ 35.832676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.833621] Read of size 8 at addr ffff888018f4c880 by task sshd/220 [ 35.834393] [ 35.834725] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.835599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.836583] Call Trace: [ 35.836922] [ 35.837212] dump_stack_lvl+0x91/0xf0 [ 35.837718] print_report+0xcc/0x620 [ 35.838202] ? __virt_addr_valid+0x102/0x340 [ 35.838758] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.839381] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.840002] kasan_report+0xbe/0xf0 [ 35.840475] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.841096] vma_interval_tree_remove+0xc75/0xec0 [ 35.841714] vma_prepare+0xc54/0x11a0 [ 35.842197] __split_vma+0x5af/0x950 [ 35.842685] ? __pfx___split_vma+0x10/0x10 [ 35.843220] ? find_held_lock+0x2c/0x110 [ 35.843739] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.844304] ? lock_is_held_type+0x9f/0x120 [ 35.844850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.845493] ? mtree_range_walk+0x632/0x900 [ 35.846045] ? mas_walk+0x5c7/0x7c0 [ 35.846520] do_vmi_munmap+0x1f1/0x2b0 [ 35.847022] mmap_region+0x1f9/0x2660 [ 35.847509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.848033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.848741] ? __pfx_lock_acquire+0x10/0x10 [ 35.849292] ? __pfx_mmap_region+0x10/0x10 [ 35.849824] ? security_mmap_addr+0x7d/0xa0 [ 35.850361] ? get_unmapped_area+0x1f5/0x3f0 [ 35.850925] do_mmap+0x854/0xf00 [ 35.851374] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.851877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.852453] ksys_mmap_pgoff+0x3af/0x500 [ 35.852969] do_syscall_64+0x3f/0x90 [ 35.853484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.854136] RIP: 0033:0x7fdf2f0b2d82 [ 35.854597] 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 [ 35.856721] RSP: 002b:00007ffdb71d5ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.857631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf2f0b2d82 [ 35.858488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf2e4ec000 [ 35.859355] RBP: 00007fdf2e4ec000 R08: 0000000000000009 R09: 0000000000001000 [ 35.860202] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556dfae68ec0 [ 35.861056] R13: 00007ffdb71d5b00 R14: 00007ffdb71d5b30 R15: 00007ffdb71d5e90 [ 35.861924] [ 35.862222] [ 35.862437] Allocated by task 213: [ 35.862867] kasan_save_stack+0x22/0x50 [ 35.863376] kasan_set_track+0x25/0x30 [ 35.863880] __kasan_slab_alloc+0x59/0x70 [ 35.864409] kmem_cache_alloc+0x16b/0x370 [ 35.864940] vm_area_dup+0x20/0x160 [ 35.865411] __split_vma+0x170/0x950 [ 35.865878] split_vma+0xc6/0x110 [ 35.866321] mprotect_fixup+0x8d2/0xb30 [ 35.866820] do_mprotect_pkey+0x87e/0xd40 [ 35.867340] __x64_sys_mprotect+0x78/0xc0 [ 35.867860] do_syscall_64+0x3f/0x90 [ 35.868333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.868976] [ 35.869197] Freed by task 204: [ 35.869598] kasan_save_stack+0x22/0x50 [ 35.870108] kasan_set_track+0x25/0x30 [ 35.870607] kasan_save_free_info+0x2b/0x50 [ 35.871133] __kasan_slab_free+0x10a/0x190 [ 35.871671] kmem_cache_free+0x10d/0x4d0 [ 35.872189] rcu_core+0x8c8/0x2860 [ 35.872639] __do_softirq+0x1b7/0x7d4 [ 35.873112] [ 35.873347] Last potentially related work creation: [ 35.873937] kasan_save_stack+0x22/0x50 [ 35.874438] __kasan_record_aux_stack+0x8e/0xa0 [ 35.875012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.875663] remove_vma+0x139/0x170 [ 35.876111] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.876674] do_vmi_munmap+0x1f1/0x2b0 [ 35.877163] __vm_munmap+0x138/0x3a0 [ 35.877641] __x64_sys_munmap+0x59/0x80 [ 35.878137] do_syscall_64+0x3f/0x90 [ 35.878610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.879245] [ 35.879466] The buggy address belongs to the object at ffff888018f4c828 [ 35.879466] which belongs to the cache vm_area_struct of size 168 [ 35.880932] The buggy address is located 88 bytes inside of [ 35.880932] freed 168-byte region [ffff888018f4c828, ffff888018f4c8d0) [ 35.882353] [ 35.882568] The buggy address belongs to the physical page: [ 35.883244] page:000000003d9fdf5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f4c [ 35.884335] memcg:ffff888018e9b901 [ 35.884773] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.885435] page_type: 0xffffffff() [ 35.885888] raw: 0100000000000200 ffff88800879fc80 ffffea00003e1480 0000000000000008 [ 35.886813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e9b901 [ 35.887740] page dumped because: kasan: bad access detected [ 35.888401] [ 35.888616] Memory state around the buggy address: [ 35.889197] ffff888018f4c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.890057] ffff888018f4c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.890924] >ffff888018f4c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.891776] ^ [ 35.892193] ffff888018f4c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.893047] ffff888018f4c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.893919] ================================================================== [ 35.894890] Disabling lock debugging due to kernel taint [ 37.885347] BUG: Bad rss-counter state mm:00000000a1e380a1 type:MM_FILEPAGES val:33 [ 37.886646] BUG: Bad rss-counter state mm:00000000a1e380a1 type:MM_ANONPAGES val:22 [ 38.264195] BUG: Bad rss-counter state mm:00000000233cace9 type:MM_FILEPAGES val:33 [ 38.265163] BUG: Bad rss-counter state mm:00000000233cace9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19891' (ECDSA) to the list of known hosts. 2023/06/20 06:50:23 fuzzer started 2023/06/20 06:50:24 dialing manager at localhost:44161 2023/06/20 06:50:24 checking machine... 2023/06/20 06:50:24 checking revisions... [ 39.029940] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:50:24 testing simple program... [ 39.083583] cgroup: Unknown subsys name 'net' [ 39.129990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:50:23 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000db5f6f76 RCX=ffff88806cbb7bb0 RDX=0000000000000011 RSI=0000000000000001 RDI=000000000600c696 RBP=ffff8880103c2e10 RSP=ffff888018dbf068 R8 =00000000dd07cc03 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092800 R14=ffff888018dbf0d0 R15=0000000000000011 RIP=ffffffff82270f13 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 00007fcaedfeb900 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=00007fcaedfca020 CR3=00000000099d2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=ffff888008c58400 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=00007ff1a957f440 CR3=000000000f7d8000 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=2033323a30353a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a30353a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000