syzkaller login: [ 31.377680] BUG: Bad rss-counter state mm:000000004ff65874 type:MM_FILEPAGES val:33 [ 31.379037] BUG: Bad rss-counter state mm:000000004ff65874 type:MM_ANONPAGES val:22 [ 31.446418] ================================================================== [ 31.447312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.448236] Read of size 8 at addr ffff88801672c140 by task sshd/220 [ 31.448997] [ 31.449215] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.450165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.451129] Call Trace: [ 31.451451] <TASK> [ 31.451734] dump_stack_lvl+0x91/0xf0 [ 31.452264] print_report+0xcc/0x620 [ 31.452740] ? __virt_addr_valid+0x102/0x340 [ 31.453278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.453884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.454502] kasan_report+0xbe/0xf0 [ 31.454966] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.455586] vma_interval_tree_remove+0xc75/0xec0 [ 31.456194] vma_prepare+0xc54/0x11a0 [ 31.456674] __split_vma+0x5af/0x950 [ 31.457137] ? __pfx___split_vma+0x10/0x10 [ 31.457652] ? find_held_lock+0x2c/0x110 [ 31.458165] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.458723] ? lock_is_held_type+0x9f/0x120 [ 31.459262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.459855] ? mtree_range_walk+0x632/0x900 [ 31.460414] ? mas_walk+0x5c7/0x7c0 [ 31.460887] do_vmi_munmap+0x1f1/0x2b0 [ 31.461372] mmap_region+0x1f9/0x2660 [ 31.461853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.462353] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.463060] ? __pfx_lock_acquire+0x10/0x10 [ 31.463596] ? __pfx_mmap_region+0x10/0x10 [ 31.464134] ? security_mmap_addr+0x7d/0xa0 [ 31.464654] ? get_unmapped_area+0x1f5/0x3f0 [ 31.465192] do_mmap+0x854/0xf00 [ 31.465618] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.466107] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.466659] ksys_mmap_pgoff+0x3af/0x500 [ 31.467172] do_syscall_64+0x3f/0x90 [ 31.467644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.468302] RIP: 0033:0x7f872cb35d82 [ 31.468754] 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 [ 31.470885] RSP: 002b:00007ffffc3ec6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.471795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f872cb35d82 [ 31.472655] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f872bf6f000 [ 31.473495] RBP: 00007f872bf6f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.474342] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568457a9ec0 [ 31.475188] R13: 00007ffffc3ec710 R14: 00007ffffc3ec740 R15: 00007ffffc3ecaa0 [ 31.476043] </TASK> [ 31.476328] [ 31.476539] Allocated by task 213: [ 31.476974] kasan_save_stack+0x22/0x50 [ 31.477475] kasan_set_track+0x25/0x30 [ 31.477955] __kasan_slab_alloc+0x59/0x70 [ 31.478464] kmem_cache_alloc+0x16b/0x370 [ 31.478979] vm_area_dup+0x20/0x160 [ 31.479429] __split_vma+0x170/0x950 [ 31.479891] split_vma+0xc6/0x110 [ 31.480339] mprotect_fixup+0x8d2/0xb30 [ 31.480842] do_mprotect_pkey+0x87e/0xd40 [ 31.481348] __x64_sys_mprotect+0x78/0xc0 [ 31.481859] do_syscall_64+0x3f/0x90 [ 31.482326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.482959] [ 31.483170] Freed by task 213: [ 31.483557] kasan_save_stack+0x22/0x50 [ 31.484059] kasan_set_track+0x25/0x30 [ 31.484549] kasan_save_free_info+0x2b/0x50 [ 31.485075] __kasan_slab_free+0x10a/0x190 [ 31.485614] kmem_cache_free+0x10d/0x4d0 [ 31.486112] rcu_core+0x8c8/0x2860 [ 31.486551] __do_softirq+0x1b7/0x7d4 [ 31.487016] [ 31.487236] Last potentially related work creation: [ 31.487821] kasan_save_stack+0x22/0x50 [ 31.488338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.488909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.489555] remove_vma+0x139/0x170 [ 31.490000] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.490541] do_vmi_munmap+0x1f1/0x2b0 [ 31.491024] __vm_munmap+0x138/0x3a0 [ 31.491493] __x64_sys_munmap+0x59/0x80 [ 31.491991] do_syscall_64+0x3f/0x90 [ 31.492464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.493099] [ 31.493312] The buggy address belongs to the object at ffff88801672c0e8 [ 31.493312] which belongs to the cache vm_area_struct of size 168 [ 31.494789] The buggy address is located 88 bytes inside of [ 31.494789] freed 168-byte region [ffff88801672c0e8, ffff88801672c190) [ 31.496201] [ 31.496418] The buggy address belongs to the physical page: [ 31.497092] page:00000000fc363d2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1672c [ 31.498181] memcg:ffff888010347d01 [ 31.498595] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.499236] page_type: 0xffffffff() [ 31.499685] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.500632] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010347d01 [ 31.501539] page dumped because: kasan: bad access detected [ 31.502206] [ 31.502418] Memory state around the buggy address: [ 31.503007] ffff88801672c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.503866] ffff88801672c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.504731] >ffff88801672c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.505585] ^ [ 31.506225] ffff88801672c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.507069] ffff88801672c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.507915] ================================================================== [ 31.509076] Disabling lock debugging due to kernel taint [ 33.470295] BUG: Bad rss-counter state mm:000000000a99281d type:MM_FILEPAGES val:33 [ 33.471454] BUG: Bad rss-counter state mm:000000000a99281d type:MM_ANONPAGES val:22 [ 33.901942] BUG: Bad rss-counter state mm:0000000043e801cf type:MM_FILEPAGES val:33 [ 33.903136] BUG: Bad rss-counter state mm:0000000043e801cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32039' (ECDSA) to the list of known hosts. 2023/06/21 05:48:02 fuzzer started 2023/06/21 05:48:02 dialing manager at localhost:36067 2023/06/21 05:48:02 checking machine... 2023/06/21 05:48:02 checking revisions... [ 34.620411] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:48:03 testing simple program... [ 34.663211] cgroup: Unknown subsys name 'net' [ 34.705424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:02 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800dc6fdf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff8113b7fa R14=0000000000000000 R15=ffff888008459bc0 RIP=ffffffff8180f184 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f5b1d3900 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=00007f9f5b29050c CR3=000000001ca3e000 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=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 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=00007f84d73773c0 CR3=000000000cbac000 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=2032303a38343a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000