syzkaller login: [ 33.015107] BUG: Bad rss-counter state mm:0000000063cc98d0 type:MM_FILEPAGES val:33 [ 33.015879] BUG: Bad rss-counter state mm:0000000063cc98d0 type:MM_ANONPAGES val:22 [ 33.143946] ================================================================== [ 33.144649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.145331] Read of size 8 at addr ffff888019f486b0 by task sshd/220 [ 33.145941] [ 33.146103] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.146728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.147622] Call Trace: [ 33.147857] [ 33.148062] dump_stack_lvl+0x91/0xf0 [ 33.148427] print_report+0xcc/0x620 [ 33.148778] ? __virt_addr_valid+0x102/0x340 [ 33.149183] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.149657] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.150136] kasan_report+0xbe/0xf0 [ 33.150509] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.150962] vma_interval_tree_remove+0xc75/0xec0 [ 33.151390] vma_prepare+0xc54/0x11a0 [ 33.151742] __split_vma+0x5af/0x950 [ 33.152077] ? __pfx___split_vma+0x10/0x10 [ 33.152461] ? find_held_lock+0x2c/0x110 [ 33.152829] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.153244] ? lock_is_held_type+0x9f/0x120 [ 33.153638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.154130] ? mtree_range_walk+0x632/0x900 [ 33.154528] ? mas_walk+0x5c7/0x7c0 [ 33.154867] do_vmi_munmap+0x1f1/0x2b0 [ 33.155231] mmap_region+0x1f9/0x2660 [ 33.155572] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.155935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.156502] ? __pfx_lock_acquire+0x10/0x10 [ 33.156875] ? __pfx_mmap_region+0x10/0x10 [ 33.157257] ? security_mmap_addr+0x7d/0xa0 [ 33.157631] ? get_unmapped_area+0x1f5/0x3f0 [ 33.158039] do_mmap+0x854/0xf00 [ 33.158359] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.158718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.159123] ksys_mmap_pgoff+0x3af/0x500 [ 33.159490] do_syscall_64+0x3f/0x90 [ 33.159837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.160294] RIP: 0033:0x7f97bf96dd82 [ 33.160626] 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 [ 33.162198] RSP: 002b:00007fff4b5db208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.162886] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97bf96dd82 [ 33.163532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97beda7000 [ 33.164153] RBP: 00007f97beda7000 R08: 0000000000000009 R09: 0000000000001000 [ 33.164757] R10: 0000000000000812 R11: 0000000000000206 R12: 000055630c4ce980 [ 33.165369] R13: 00007fff4b5db220 R14: 00007fff4b5db250 R15: 00007fff4b5db5b0 [ 33.166036] [ 33.166247] [ 33.166400] Allocated by task 213: [ 33.166720] kasan_save_stack+0x22/0x50 [ 33.167089] kasan_set_track+0x25/0x30 [ 33.167462] __kasan_slab_alloc+0x59/0x70 [ 33.167870] kmem_cache_alloc+0x16b/0x370 [ 33.168262] vm_area_dup+0x20/0x160 [ 33.168592] __split_vma+0x170/0x950 [ 33.168940] split_vma+0xc6/0x110 [ 33.169253] mprotect_fixup+0x8d2/0xb30 [ 33.169614] do_mprotect_pkey+0x87e/0xd40 [ 33.170034] __x64_sys_mprotect+0x78/0xc0 [ 33.170425] do_syscall_64+0x3f/0x90 [ 33.170779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.171261] [ 33.171418] Freed by task 19: [ 33.171701] kasan_save_stack+0x22/0x50 [ 33.172084] kasan_set_track+0x25/0x30 [ 33.172433] kasan_save_free_info+0x2b/0x50 [ 33.172827] __kasan_slab_free+0x10a/0x190 [ 33.173210] kmem_cache_free+0x10d/0x4d0 [ 33.173576] rcu_core+0x8c8/0x2860 [ 33.173968] __do_softirq+0x1b7/0x7d4 [ 33.174316] [ 33.174476] Last potentially related work creation: [ 33.174894] kasan_save_stack+0x22/0x50 [ 33.175249] __kasan_record_aux_stack+0x8e/0xa0 [ 33.175697] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.176176] remove_vma+0x139/0x170 [ 33.176511] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.176900] do_vmi_munmap+0x1f1/0x2b0 [ 33.177248] __vm_munmap+0x138/0x3a0 [ 33.177579] __x64_sys_munmap+0x59/0x80 [ 33.177966] do_syscall_64+0x3f/0x90 [ 33.178301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.178749] [ 33.178904] The buggy address belongs to the object at ffff888019f48658 [ 33.178904] which belongs to the cache vm_area_struct of size 168 [ 33.179938] The buggy address is located 88 bytes inside of [ 33.179938] freed 168-byte region [ffff888019f48658, ffff888019f48700) [ 33.180919] [ 33.181069] The buggy address belongs to the physical page: [ 33.181532] page:00000000c7f443ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f48 [ 33.182288] memcg:ffff888018e62401 [ 33.182571] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.183015] page_type: 0xffffffff() [ 33.183322] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.183963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e62401 [ 33.184582] page dumped because: kasan: bad access detected [ 33.185051] [ 33.185204] Memory state around the buggy address: [ 33.185606] ffff888019f48580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.186241] ffff888019f48600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.186802] >ffff888019f48680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.187371] ^ [ 33.187763] ffff888019f48700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.188345] ffff888019f48780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.188916] ================================================================== [ 33.189709] Disabling lock debugging due to kernel taint [ 35.203660] BUG: Bad rss-counter state mm:00000000ebad07a3 type:MM_FILEPAGES val:33 [ 35.204334] BUG: Bad rss-counter state mm:00000000ebad07a3 type:MM_ANONPAGES val:22 [ 35.577405] BUG: Bad rss-counter state mm:0000000019fb2c89 type:MM_FILEPAGES val:33 [ 35.578154] BUG: Bad rss-counter state mm:0000000019fb2c89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46924' (ECDSA) to the list of known hosts. 2023/06/20 09:17:53 fuzzer started 2023/06/20 09:17:53 dialing manager at localhost:44161 2023/06/20 09:17:53 checking machine... 2023/06/20 09:17:53 checking revisions... [ 36.160002] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:17:53 testing simple program... [ 36.195322] cgroup: Unknown subsys name 'net' [ 36.230231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f4bfa38e920 CR3=000000000d83c000 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=9bb1d492974f91960745ecbcce55501e XMM02=2c67c8bc2e329bc3000000000011d970 XMM03=fb795ef6d65770560000000000124718 XMM04=e9ff74fc3770c02000000000000ae988 XMM05=19e9129bd510f2350000000000134310 XMM06=4fda316b135da52b0000000000134198 XMM07=e042d86d42eb936e0000000000124998 XMM08=da2bf770244ca218000000000011d9d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d0c26 RBX=0000000000000001 RCX=ffffffff81370a39 RDX=0000000000000000 RSI=ffffffff860d0c26 RDI=ffffffff85db8410 RBP=ffffffff85db8414 RSP=ffff88800fd17920 R8 =ffffffff860d0c26 R9 =ffff88800fd17a00 R10=0000000000038001 R11=000000000000fc0f R12=ffffffff85db8410 R13=ffffffff85db8410 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000286 [--S--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 00007f96c7607900 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=00007ffc0cf13000 CR3=000000000cabc000 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=6720646572637465733a4d41503d706f 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