syzkaller login: [ 30.898054] BUG: Bad rss-counter state mm:00000000b1f3b282 type:MM_FILEPAGES val:33 [ 30.898907] BUG: Bad rss-counter state mm:00000000b1f3b282 type:MM_ANONPAGES val:22 [ 31.023760] ================================================================== [ 31.024471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.025054] Read of size 8 at addr ffff88801a1c6880 by task sshd/219 [ 31.025541] [ 31.025682] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.026301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.026975] Call Trace: [ 31.027179] [ 31.027363] dump_stack_lvl+0x91/0xf0 [ 31.027672] print_report+0xcc/0x620 [ 31.028242] ? __virt_addr_valid+0x102/0x340 [ 31.028708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.029118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.029541] kasan_report+0xbe/0xf0 [ 31.029881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.030360] vma_interval_tree_remove+0xc75/0xec0 [ 31.030824] vma_prepare+0xc54/0x11a0 [ 31.031151] __split_vma+0x5af/0x950 [ 31.031458] ? __pfx___split_vma+0x10/0x10 [ 31.031788] ? find_held_lock+0x2c/0x110 [ 31.032163] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.032553] ? lock_is_held_type+0x9f/0x120 [ 31.032920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.033337] ? mtree_range_walk+0x632/0x900 [ 31.033699] ? mas_walk+0x5c7/0x7c0 [ 31.034035] do_vmi_munmap+0x1f1/0x2b0 [ 31.034379] mmap_region+0x1f9/0x2660 [ 31.034714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.035045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.035510] ? __pfx_lock_acquire+0x10/0x10 [ 31.035848] ? __pfx_mmap_region+0x10/0x10 [ 31.036263] ? security_mmap_addr+0x7d/0xa0 [ 31.036621] ? get_unmapped_area+0x1f5/0x3f0 [ 31.036990] do_mmap+0x854/0xf00 [ 31.037290] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.037622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.037990] ksys_mmap_pgoff+0x3af/0x500 [ 31.038314] do_syscall_64+0x3f/0x90 [ 31.038637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.039058] RIP: 0033:0x7fea4f3a6d82 [ 31.039377] 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 [ 31.040786] RSP: 002b:00007fffca72efc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.041368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea4f3a6d82 [ 31.041910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea4e7e0000 [ 31.042507] RBP: 00007fea4e7e0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.043061] R10: 0000000000000812 R11: 0000000000000206 R12: 000056552b1cab20 [ 31.043599] R13: 00007fffca72efe0 R14: 00007fffca72f010 R15: 00007fffca72f370 [ 31.044203] [ 31.044394] [ 31.044528] Allocated by task 212: [ 31.044798] kasan_save_stack+0x22/0x50 [ 31.045151] kasan_set_track+0x25/0x30 [ 31.045478] __kasan_slab_alloc+0x59/0x70 [ 31.045835] kmem_cache_alloc+0x16b/0x370 [ 31.046173] vm_area_dup+0x20/0x160 [ 31.046480] __split_vma+0x170/0x950 [ 31.046782] split_vma+0xc6/0x110 [ 31.047065] mprotect_fixup+0x8d2/0xb30 [ 31.047411] do_mprotect_pkey+0x87e/0xd40 [ 31.047754] __x64_sys_mprotect+0x78/0xc0 [ 31.048122] do_syscall_64+0x3f/0x90 [ 31.048455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048893] [ 31.049033] Freed by task 19: [ 31.049284] kasan_save_stack+0x22/0x50 [ 31.049617] kasan_set_track+0x25/0x30 [ 31.049930] kasan_save_free_info+0x2b/0x50 [ 31.050274] __kasan_slab_free+0x10a/0x190 [ 31.050633] kmem_cache_free+0x10d/0x4d0 [ 31.050969] rcu_core+0x8c8/0x2860 [ 31.051254] __do_softirq+0x1b7/0x7d4 [ 31.051554] [ 31.051695] Last potentially related work creation: [ 31.052121] kasan_save_stack+0x22/0x50 [ 31.052448] __kasan_record_aux_stack+0x8e/0xa0 [ 31.052828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.053237] remove_vma+0x139/0x170 [ 31.053536] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.053897] do_vmi_munmap+0x1f1/0x2b0 [ 31.054200] __vm_munmap+0x138/0x3a0 [ 31.054504] __x64_sys_munmap+0x59/0x80 [ 31.054841] do_syscall_64+0x3f/0x90 [ 31.055162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.055601] [ 31.055744] The buggy address belongs to the object at ffff88801a1c6828 [ 31.055744] which belongs to the cache vm_area_struct of size 168 [ 31.056773] The buggy address is located 88 bytes inside of [ 31.056773] freed 168-byte region [ffff88801a1c6828, ffff88801a1c68d0) [ 31.057693] [ 31.057832] The buggy address belongs to the physical page: [ 31.058262] page:00000000a82a920b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1c6 [ 31.058997] memcg:ffff88801a3bd301 [ 31.059266] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.059678] page_type: 0xffffffff() [ 31.059966] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.060591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3bd301 [ 31.061181] page dumped because: kasan: bad access detected [ 31.061612] [ 31.061753] Memory state around the buggy address: [ 31.062132] ffff88801a1c6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.062688] ffff88801a1c6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.063262] >ffff88801a1c6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.063862] ^ [ 31.064169] ffff88801a1c6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.064745] ffff88801a1c6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.065310] ================================================================== [ 31.065954] Disabling lock debugging due to kernel taint [ 32.822879] BUG: Bad rss-counter state mm:000000000f8a7462 type:MM_FILEPAGES val:33 [ 32.823705] BUG: Bad rss-counter state mm:000000000f8a7462 type:MM_ANONPAGES val:22 [ 33.195205] BUG: Bad rss-counter state mm:00000000e7c06ffe type:MM_FILEPAGES val:33 [ 33.196256] BUG: Bad rss-counter state mm:00000000e7c06ffe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26583' (ECDSA) to the list of known hosts. 2023/06/21 09:21:14 fuzzer started 2023/06/21 09:21:14 dialing manager at localhost:36067 2023/06/21 09:21:14 checking machine... 2023/06/21 09:21:14 checking revisions... [ 33.793329] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:21:14 testing simple program... [ 33.823771] cgroup: Unknown subsys name 'net' [ 33.876567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801602f488 RSI=ffff88801602fe78 RDI=ffff88801602f488 RBP=ffff88801602f520 RSP=ffff88801602f478 R8 =0000000000000001 R9 =ffff88801602f4c8 R10=0000000000038001 R11=0000000000022713 R12=ffff88801602f550 R13=0000000000000000 R14=ffff888015c41b40 R15=00000000802a0002 RIP=ffffffff81130352 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 00007f623bc28700 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=00007fb792a36070 CR3=0000000018d12000 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=2033313a31323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000933c5f30 RBX=000000009dae6f28 RCX=ffff888008e37aac RDX=0000000000000006 RSI=0000000000000003 RDI=0000000005996f19 RBP=0000000000000000 RSP=ffff888008e37a20 R8 =00000000da2f0178 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffff888008e37a88 R15=0000000000000006 RIP=ffffffff822704b6 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 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=00007fc1050f3008 CR3=000000001b86e000 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=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