syzkaller login: [ 72.291936] BUG: Bad rss-counter state mm:00000000e8ff46c7 type:MM_FILEPAGES val:33 [ 72.292653] BUG: Bad rss-counter state mm:00000000e8ff46c7 type:MM_ANONPAGES val:22 [ 72.442427] ================================================================== [ 72.443028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.443647] Read of size 8 at addr ffff888017ddc5c8 by task sshd/219 [ 72.444135] [ 72.444271] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.444932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.445571] Call Trace: [ 72.445777] [ 72.445957] dump_stack_lvl+0x91/0xf0 [ 72.446287] print_report+0xcc/0x620 [ 72.446608] ? __virt_addr_valid+0x102/0x340 [ 72.446967] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.447370] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.447764] kasan_report+0xbe/0xf0 [ 72.448074] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.448477] vma_interval_tree_remove+0xc75/0xec0 [ 72.449645] vma_prepare+0xc54/0x11a0 [ 72.449996] __split_vma+0x5af/0x950 [ 72.450318] ? __pfx___split_vma+0x10/0x10 [ 72.450661] ? find_held_lock+0x2c/0x110 [ 72.450998] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.451372] ? lock_is_held_type+0x9f/0x120 [ 72.451728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.452124] ? mtree_range_walk+0x632/0x900 [ 72.452484] ? mas_walk+0x5c7/0x7c0 [ 72.452797] do_vmi_munmap+0x1f1/0x2b0 [ 72.453207] mmap_region+0x1f9/0x2660 [ 72.453618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.453953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.454975] ? __pfx_lock_acquire+0x10/0x10 [ 72.455320] ? __pfx_mmap_region+0x10/0x10 [ 72.455704] ? security_mmap_addr+0x7d/0xa0 [ 72.456054] ? get_unmapped_area+0x1f5/0x3f0 [ 72.456468] do_mmap+0x854/0xf00 [ 72.456758] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.457120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.457520] ksys_mmap_pgoff+0x3af/0x500 [ 72.457839] do_syscall_64+0x3f/0x90 [ 72.458137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.458629] RIP: 0033:0x7f3a2b0c2d82 [ 72.458914] 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 [ 72.460268] RSP: 002b:00007fffc88958e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.460878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a2b0c2d82 [ 72.461493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a2a4fc000 [ 72.462021] RBP: 00007f3a2a4fc000 R08: 0000000000000009 R09: 0000000000001000 [ 72.462595] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4a7a5b980 [ 72.463142] R13: 00007fffc8895900 R14: 00007fffc8895930 R15: 00007fffc8895c90 [ 72.463773] [ 72.463968] [ 72.464111] Allocated by task 212: [ 72.464445] kasan_save_stack+0x22/0x50 [ 72.464780] kasan_set_track+0x25/0x30 [ 72.465147] __kasan_slab_alloc+0x59/0x70 [ 72.465536] kmem_cache_alloc+0x16b/0x370 [ 72.465869] vm_area_dup+0x20/0x160 [ 72.466168] __split_vma+0x170/0x950 [ 72.466516] split_vma+0xc6/0x110 [ 72.466804] mprotect_fixup+0x8d2/0xb30 [ 72.467120] do_mprotect_pkey+0x87e/0xd40 [ 72.467527] __x64_sys_mprotect+0x78/0xc0 [ 72.467868] do_syscall_64+0x3f/0x90 [ 72.468186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.468685] [ 72.468827] Freed by task 13: [ 72.469113] kasan_save_stack+0x22/0x50 [ 72.469530] kasan_set_track+0x25/0x30 [ 72.469859] kasan_save_free_info+0x2b/0x50 [ 72.470205] __kasan_slab_free+0x10a/0x190 [ 72.470598] kmem_cache_free+0x10d/0x4d0 [ 72.470921] rcu_core+0x8c8/0x2860 [ 72.471215] __do_softirq+0x1b7/0x7d4 [ 72.471575] [ 72.471720] Last potentially related work creation: [ 72.472086] kasan_save_stack+0x22/0x50 [ 72.472477] __kasan_record_aux_stack+0x8e/0xa0 [ 72.472863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.473297] remove_vma+0x139/0x170 [ 72.473672] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.474032] do_vmi_munmap+0x1f1/0x2b0 [ 72.474404] __vm_munmap+0x138/0x3a0 [ 72.474702] __x64_sys_munmap+0x59/0x80 [ 72.475012] do_syscall_64+0x3f/0x90 [ 72.475309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.475766] [ 72.475910] The buggy address belongs to the object at ffff888017ddc570 [ 72.475910] which belongs to the cache vm_area_struct of size 168 [ 72.477844] The buggy address is located 88 bytes inside of [ 72.477844] freed 168-byte region [ffff888017ddc570, ffff888017ddc618) [ 72.478780] [ 72.478910] The buggy address belongs to the physical page: [ 72.479301] page:00000000dd660e82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ddc [ 72.479990] memcg:ffff88800eb7e301 [ 72.480248] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.480681] page_type: 0xffffffff() [ 72.480965] raw: 0100000000000200 ffff88800879fc80 ffffea00005a0c40 dead000000000006 [ 72.481626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb7e301 [ 72.482198] page dumped because: kasan: bad access detected [ 72.482648] [ 72.482801] Memory state around the buggy address: [ 72.483193] ffff888017ddc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.483844] ffff888017ddc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 72.484423] >ffff888017ddc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.484980] ^ [ 72.485441] ffff888017ddc600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 72.485944] ffff888017ddc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.486493] ================================================================== [ 72.488583] Disabling lock debugging due to kernel taint [ 74.417914] BUG: Bad rss-counter state mm:000000004b44d505 type:MM_FILEPAGES val:33 [ 74.418847] BUG: Bad rss-counter state mm:000000004b44d505 type:MM_ANONPAGES val:22 [ 75.141017] BUG: Bad rss-counter state mm:000000006276cfe5 type:MM_FILEPAGES val:33 [ 75.141656] BUG: Bad rss-counter state mm:000000006276cfe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55343' (ECDSA) to the list of known hosts. 2023/06/20 10:15:52 fuzzer started 2023/06/20 10:15:52 dialing manager at localhost:44161 2023/06/20 10:15:52 checking machine... 2023/06/20 10:15:52 checking revisions... [ 76.192071] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:15:53 testing simple program... [ 76.262630] cgroup: Unknown subsys name 'net' [ 76.391394] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 10:15:18 Registers: info registers vcpu 0 RAX=0000000080080783 RBX=ffff88800f3e8000 RCX=0000000000000000 RDX=ffffc90000660000 RSI=ffffffff8301b27f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09eb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=ffff88800f3e9428 R14=ffff88800f3e9040 R15=000000000000000a RIP=ffffffff8301b2b6 RFL=00000046 [---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 00007f6eeebc4900 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=00007ffdca96c000 CR3=000000000dce0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc786ed7328 CR3=0000000005482000 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