syzkaller login: [ 30.504104] BUG: Bad rss-counter state mm:0000000075c9343f type:MM_FILEPAGES val:33 [ 30.504864] BUG: Bad rss-counter state mm:0000000075c9343f type:MM_ANONPAGES val:22 [ 30.674666] ================================================================== [ 30.675873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.677094] Read of size 8 at addr ffff88800f15ad08 by task sshd/220 [ 30.678247] [ 30.678526] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.679675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.680968] Call Trace: [ 30.681384] <TASK> [ 30.681748] dump_stack_lvl+0x91/0xf0 [ 30.682387] print_report+0xcc/0x620 [ 30.683010] ? __virt_addr_valid+0x102/0x340 [ 30.683759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.684566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.685358] kasan_report+0xbe/0xf0 [ 30.685977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.686788] vma_interval_tree_remove+0xc75/0xec0 [ 30.687586] vma_prepare+0xc54/0x11a0 [ 30.688207] __split_vma+0x5af/0x950 [ 30.688815] ? __pfx___split_vma+0x10/0x10 [ 30.689510] ? find_held_lock+0x2c/0x110 [ 30.690191] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.690939] ? lock_is_held_type+0x9f/0x120 [ 30.691656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.692444] ? mtree_range_walk+0x632/0x900 [ 30.693178] ? mas_walk+0x5c7/0x7c0 [ 30.693808] do_vmi_munmap+0x1f1/0x2b0 [ 30.694446] mmap_region+0x1f9/0x2660 [ 30.695072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.695764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.696701] ? __pfx_lock_acquire+0x10/0x10 [ 30.697402] ? __pfx_mmap_region+0x10/0x10 [ 30.698106] ? security_mmap_addr+0x7d/0xa0 [ 30.698809] ? get_unmapped_area+0x1f5/0x3f0 [ 30.699548] do_mmap+0x854/0xf00 [ 30.700115] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.700757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.701502] ksys_mmap_pgoff+0x3af/0x500 [ 30.702164] do_syscall_64+0x3f/0x90 [ 30.702788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703638] RIP: 0033:0x7f24de904d82 [ 30.704236] 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 [ 30.706786] RSP: 002b:00007ffd67bcf458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.707723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24de904d82 [ 30.708580] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24ddd3e000 [ 30.709427] RBP: 00007f24ddd3e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.710275] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df26205f60 [ 30.711140] R13: 00007ffd67bcf470 R14: 00007ffd67bcf4a0 R15: 00007ffd67bcf800 [ 30.712051] </TASK> [ 30.712363] [ 30.712597] Allocated by task 213: [ 30.713053] kasan_save_stack+0x22/0x50 [ 30.713589] kasan_set_track+0x25/0x30 [ 30.714113] __kasan_slab_alloc+0x59/0x70 [ 30.714677] kmem_cache_alloc+0x16b/0x370 [ 30.715232] vm_area_dup+0x20/0x160 [ 30.715724] __split_vma+0x170/0x950 [ 30.716234] split_vma+0xc6/0x110 [ 30.716722] mprotect_fixup+0x8d2/0xb30 [ 30.717285] do_mprotect_pkey+0x87e/0xd40 [ 30.717867] __x64_sys_mprotect+0x78/0xc0 [ 30.718441] do_syscall_64+0x3f/0x90 [ 30.719043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719779] [ 30.720021] Freed by task 0: [ 30.720441] kasan_save_stack+0x22/0x50 [ 30.720998] kasan_set_track+0x25/0x30 [ 30.721548] kasan_save_free_info+0x2b/0x50 [ 30.722148] __kasan_slab_free+0x10a/0x190 [ 30.722742] kmem_cache_free+0x10d/0x4d0 [ 30.723331] rcu_core+0x8c8/0x2860 [ 30.723822] __do_softirq+0x1b7/0x7d4 [ 30.724364] [ 30.724611] Last potentially related work creation: [ 30.725255] kasan_save_stack+0x22/0x50 [ 30.725822] __kasan_record_aux_stack+0x8e/0xa0 [ 30.726457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.727198] remove_vma+0x139/0x170 [ 30.727698] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.728322] do_vmi_munmap+0x1f1/0x2b0 [ 30.728862] __vm_munmap+0x138/0x3a0 [ 30.729376] __x64_sys_munmap+0x59/0x80 [ 30.729915] do_syscall_64+0x3f/0x90 [ 30.730437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731156] [ 30.731397] Second to last potentially related work creation: [ 30.732132] kasan_save_stack+0x22/0x50 [ 30.732668] __kasan_record_aux_stack+0x8e/0xa0 [ 30.733278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.733958] remove_vma+0x139/0x170 [ 30.734447] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.735050] do_vmi_munmap+0x1f1/0x2b0 [ 30.735584] mmap_region+0x1f9/0x2660 [ 30.736086] do_mmap+0x854/0xf00 [ 30.736540] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.737058] ksys_mmap_pgoff+0x3af/0x500 [ 30.737601] do_syscall_64+0x3f/0x90 [ 30.738111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738801] [ 30.739031] The buggy address belongs to the object at ffff88800f15acb0 [ 30.739031] which belongs to the cache vm_area_struct of size 168 [ 30.740605] The buggy address is located 88 bytes inside of [ 30.740605] freed 168-byte region [ffff88800f15acb0, ffff88800f15ad58) [ 30.742115] [ 30.742344] The buggy address belongs to the physical page: [ 30.743063] page:000000009fc98658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf15a [ 30.744408] memcg:ffff88800eb51a01 [ 30.744985] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.745921] page_type: 0xffffffff() [ 30.746508] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8c80 000000000000000d [ 30.747752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb51a01 [ 30.748838] page dumped because: kasan: bad access detected [ 30.749533] [ 30.749755] Memory state around the buggy address: [ 30.750354] ffff88800f15ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.751266] ffff88800f15ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.752185] >ffff88800f15ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.753093] ^ [ 30.753562] ffff88800f15ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.754468] ffff88800f15ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.755415] ================================================================== [ 30.756478] Disabling lock debugging due to kernel taint [ 33.312120] BUG: Bad rss-counter state mm:00000000271b32a9 type:MM_FILEPAGES val:33 [ 33.313098] BUG: Bad rss-counter state mm:00000000271b32a9 type:MM_ANONPAGES val:22 [ 33.801752] BUG: Bad rss-counter state mm:00000000bf2bfec5 type:MM_FILEPAGES val:33 [ 33.803033] BUG: Bad rss-counter state mm:00000000bf2bfec5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28939' (ECDSA) to the list of known hosts. 2023/06/21 00:26:29 fuzzer started 2023/06/21 00:26:29 dialing manager at localhost:36067 2023/06/21 00:26:29 checking machine... 2023/06/21 00:26:29 checking revisions... [ 34.524599] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:26:29 testing simple program... [ 34.570639] cgroup: Unknown subsys name 'net' [ 34.618804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f094c4d2bb0 CR3=000000001695c000 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=2038323a36323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36323a3030203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8450cc7e RDX=dffffc0000000000 RSI=ffffffff8450cc7f RDI=ffff8880095f70d8 RBP=ffff8880095f7130 RSP=ffff8880095f7068 R8 =ffffffff86129ab2 R9 =ffff8880095f7118 R10=0000000000038001 R11=000000000001e4ed R12=ffff8880095f7138 R13=ffff8880095f7120 R14=ffff8880095f7119 R15=ffff8880095f70d8 RIP=ffffffff81130719 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 00007fa0d8de8900 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=00007fa0d8dad008 CR3=000000000f392000 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