syzkaller login: [ 30.444364] BUG: Bad rss-counter state mm:00000000f00eded6 type:MM_FILEPAGES val:33 [ 30.445622] BUG: Bad rss-counter state mm:00000000f00eded6 type:MM_ANONPAGES val:22 [ 30.617691] ================================================================== [ 30.618676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.619659] Read of size 8 at addr ffff888016d30ed8 by task sshd/220 [ 30.620598] [ 30.620832] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.621736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.622787] Call Trace: [ 30.623125] [ 30.623426] dump_stack_lvl+0x91/0xf0 [ 30.623944] print_report+0xcc/0x620 [ 30.624452] ? __virt_addr_valid+0x102/0x340 [ 30.625032] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.626331] kasan_report+0xbe/0xf0 [ 30.626836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.627515] vma_interval_tree_remove+0xc75/0xec0 [ 30.628168] vma_prepare+0xc54/0x11a0 [ 30.628688] __split_vma+0x5af/0x950 [ 30.629200] ? __pfx___split_vma+0x10/0x10 [ 30.629772] ? find_held_lock+0x2c/0x110 [ 30.630367] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.630981] ? lock_is_held_type+0x9f/0x120 [ 30.631568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.632232] ? mtree_range_walk+0x632/0x900 [ 30.632836] ? mas_walk+0x5c7/0x7c0 [ 30.633352] do_vmi_munmap+0x1f1/0x2b0 [ 30.633895] mmap_region+0x1f9/0x2660 [ 30.634422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.634979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.635755] ? __pfx_lock_acquire+0x10/0x10 [ 30.636337] ? __pfx_mmap_region+0x10/0x10 [ 30.636913] ? security_mmap_addr+0x7d/0xa0 [ 30.637489] ? get_unmapped_area+0x1f5/0x3f0 [ 30.638090] do_mmap+0x854/0xf00 [ 30.638569] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.639105] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.639714] ksys_mmap_pgoff+0x3af/0x500 [ 30.640269] do_syscall_64+0x3f/0x90 [ 30.640794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.641495] RIP: 0033:0x7fa5fbabdd82 [ 30.642013] 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 [ 30.644317] RSP: 002b:00007ffc406d1e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.645300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5fbabdd82 [ 30.646223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5faef7000 [ 30.647140] RBP: 00007fa5faef7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.648066] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557072319ec0 [ 30.648994] R13: 00007ffc406d1e60 R14: 00007ffc406d1e90 R15: 00007ffc406d21f0 [ 30.649927] [ 30.650245] [ 30.650477] Allocated by task 213: [ 30.650943] kasan_save_stack+0x22/0x50 [ 30.651492] kasan_set_track+0x25/0x30 [ 30.652054] __kasan_slab_alloc+0x59/0x70 [ 30.652624] kmem_cache_alloc+0x16b/0x370 [ 30.653187] vm_area_dup+0x20/0x160 [ 30.653676] __split_vma+0x170/0x950 [ 30.654199] split_vma+0xc6/0x110 [ 30.654661] mprotect_fixup+0x8d2/0xb30 [ 30.655189] do_mprotect_pkey+0x87e/0xd40 [ 30.655752] __x64_sys_mprotect+0x78/0xc0 [ 30.656324] do_syscall_64+0x3f/0x90 [ 30.656842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.657541] [ 30.657775] Freed by task 213: [ 30.658210] kasan_save_stack+0x22/0x50 [ 30.658761] kasan_set_track+0x25/0x30 [ 30.659308] kasan_save_free_info+0x2b/0x50 [ 30.659881] __kasan_slab_free+0x10a/0x190 [ 30.660466] kmem_cache_free+0x10d/0x4d0 [ 30.661018] rcu_core+0x8c8/0x2860 [ 30.661568] __do_softirq+0x1b7/0x7d4 [ 30.662107] [ 30.662343] Last potentially related work creation: [ 30.662975] kasan_save_stack+0x22/0x50 [ 30.663517] __kasan_record_aux_stack+0x8e/0xa0 [ 30.664130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.664818] remove_vma+0x139/0x170 [ 30.665305] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.665910] do_vmi_munmap+0x1f1/0x2b0 [ 30.666426] __vm_munmap+0x138/0x3a0 [ 30.666921] __x64_sys_munmap+0x59/0x80 [ 30.667440] do_syscall_64+0x3f/0x90 [ 30.667949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668624] [ 30.668851] The buggy address belongs to the object at ffff888016d30e80 [ 30.668851] which belongs to the cache vm_area_struct of size 168 [ 30.670406] The buggy address is located 88 bytes inside of [ 30.670406] freed 168-byte region [ffff888016d30e80, ffff888016d30f28) [ 30.671928] [ 30.672162] The buggy address belongs to the physical page: [ 30.672872] page:00000000b625fcf5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d30 [ 30.674080] memcg:ffff888015b23401 [ 30.674543] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.675250] page_type: 0xffffffff() [ 30.675736] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.676728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b23401 [ 30.677709] page dumped because: kasan: bad access detected [ 30.678442] [ 30.678669] Memory state around the buggy address: [ 30.679296] ffff888016d30d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.680228] ffff888016d30e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.681147] >ffff888016d30e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.682087] ^ [ 30.682871] ffff888016d30f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.683804] ffff888016d30f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.684728] ================================================================== [ 30.685795] Disabling lock debugging due to kernel taint [ 32.522742] BUG: Bad rss-counter state mm:00000000143fff1f type:MM_FILEPAGES val:33 [ 32.523550] BUG: Bad rss-counter state mm:00000000143fff1f type:MM_ANONPAGES val:22 [ 33.141842] BUG: Bad rss-counter state mm:0000000023e49365 type:MM_FILEPAGES val:33 [ 33.143037] BUG: Bad rss-counter state mm:0000000023e49365 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52919' (ECDSA) to the list of known hosts. 2023/06/21 08:35:23 fuzzer started 2023/06/21 08:35:23 dialing manager at localhost:36067 2023/06/21 08:35:23 checking machine... 2023/06/21 08:35:23 checking revisions... [ 33.792221] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:23 testing simple program... [ 33.836737] cgroup: Unknown subsys name 'net' [ 33.879701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:23 Registers: info registers vcpu 0 RAX=ffffffff83662290 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001d85e5d RSI=ffffffff83662290 RDI=ffff88800ec2f358 RBP=ffff88800ec2f328 RSP=ffff88800ec2f288 R8 =0000000000000001 R9 =ffff88800ec2f2d0 R10=0000000000038001 R11=000000000001cff6 R12=ffff88800ec2f358 R13=0000000000000000 R14=ffff888019980000 R15=ffff88800c74c720 RIP=ffffffff84538440 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 00007f17c1971900 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=00007ffd381a9ff8 CR3=00000000198e8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f2f6c338988 CR3=000000000d60c000 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=2b7c879b9d911397754d84be7a97ad7e XMM02=000000000011a410eff9b2d0a8fce9cb XMM03=000000000011a4e02c67c8bc2e329bc3 XMM04=9febdcfcb88a02cb00000000000ae988 XMM05=52b215e5ca479d840000000000132510 XMM06=4fda316b135da52b00000000001315b0 XMM07=e042d86d42eb936e0000000000121898 XMM08=2b5e2fe4afa58ccd000000000011a4e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000