syzkaller login: [ 31.595210] BUG: Bad rss-counter state mm:00000000a3b72dff type:MM_FILEPAGES val:33 [ 31.596446] BUG: Bad rss-counter state mm:00000000a3b72dff type:MM_ANONPAGES val:22 [ 31.636822] ================================================================== [ 31.638085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.639420] Read of size 8 at addr ffff88800d581d08 by task sshd/220 [ 31.640473] [ 31.640782] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.641960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.643074] Call Trace: [ 31.643404] [ 31.643756] dump_stack_lvl+0x91/0xf0 [ 31.644306] print_report+0xcc/0x620 [ 31.644816] ? __virt_addr_valid+0x102/0x340 [ 31.645422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.646089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.646747] kasan_report+0xbe/0xf0 [ 31.647236] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.647856] vma_interval_tree_remove+0xc75/0xec0 [ 31.648474] vma_prepare+0xc54/0x11a0 [ 31.648981] __split_vma+0x5af/0x950 [ 31.649573] ? __pfx___split_vma+0x10/0x10 [ 31.650153] ? find_held_lock+0x2c/0x110 [ 31.650677] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.651309] ? lock_is_held_type+0x9f/0x120 [ 31.651928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.652559] ? mtree_range_walk+0x632/0x900 [ 31.653206] ? mas_walk+0x5c7/0x7c0 [ 31.653739] do_vmi_munmap+0x1f1/0x2b0 [ 31.654300] mmap_region+0x1f9/0x2660 [ 31.654822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.655350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.656091] ? __pfx_lock_acquire+0x10/0x10 [ 31.656632] ? __pfx_mmap_region+0x10/0x10 [ 31.657211] ? security_mmap_addr+0x7d/0xa0 [ 31.657738] ? get_unmapped_area+0x1f5/0x3f0 [ 31.658306] do_mmap+0x854/0xf00 [ 31.658743] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.659251] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.659818] ksys_mmap_pgoff+0x3af/0x500 [ 31.660349] do_syscall_64+0x3f/0x90 [ 31.660844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.661512] RIP: 0033:0x7f26c38f5d82 [ 31.661967] 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 [ 31.664117] RSP: 002b:00007fff565aaf18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.665047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26c38f5d82 [ 31.665900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26c2d2f000 [ 31.666765] RBP: 00007f26c2d2f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.667619] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de9624dec0 [ 31.668484] R13: 00007fff565aaf30 R14: 00007fff565aaf60 R15: 00007fff565ab2c0 [ 31.669377] [ 31.669672] [ 31.669893] Allocated by task 213: [ 31.670337] kasan_save_stack+0x22/0x50 [ 31.670840] kasan_set_track+0x25/0x30 [ 31.671354] __kasan_slab_alloc+0x59/0x70 [ 31.671887] kmem_cache_alloc+0x16b/0x370 [ 31.672414] vm_area_dup+0x20/0x160 [ 31.672878] __split_vma+0x170/0x950 [ 31.673368] split_vma+0xc6/0x110 [ 31.673812] mprotect_fixup+0x8d2/0xb30 [ 31.674325] do_mprotect_pkey+0x87e/0xd40 [ 31.674844] __x64_sys_mprotect+0x78/0xc0 [ 31.675382] do_syscall_64+0x3f/0x90 [ 31.675861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676520] [ 31.676756] Freed by task 213: [ 31.677176] kasan_save_stack+0x22/0x50 [ 31.677683] kasan_set_track+0x25/0x30 [ 31.678186] kasan_save_free_info+0x2b/0x50 [ 31.678716] __kasan_slab_free+0x10a/0x190 [ 31.679275] kmem_cache_free+0x10d/0x4d0 [ 31.679783] rcu_core+0x8c8/0x2860 [ 31.680240] __do_softirq+0x1b7/0x7d4 [ 31.680731] [ 31.680946] Last potentially related work creation: [ 31.681580] kasan_save_stack+0x22/0x50 [ 31.682106] __kasan_record_aux_stack+0x8e/0xa0 [ 31.682676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.683337] remove_vma+0x139/0x170 [ 31.683789] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.684363] do_vmi_munmap+0x1f1/0x2b0 [ 31.684894] __vm_munmap+0x138/0x3a0 [ 31.685525] __x64_sys_munmap+0x59/0x80 [ 31.686145] do_syscall_64+0x3f/0x90 [ 31.686732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.687532] [ 31.687798] Second to last potentially related work creation: [ 31.688646] kasan_save_stack+0x22/0x50 [ 31.689287] __kasan_record_aux_stack+0x8e/0xa0 [ 31.689993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.690821] remove_vma+0x139/0x170 [ 31.691440] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.692156] do_vmi_munmap+0x1f1/0x2b0 [ 31.692672] __vm_munmap+0x138/0x3a0 [ 31.693181] __x64_sys_munmap+0x59/0x80 [ 31.693681] do_syscall_64+0x3f/0x90 [ 31.694214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.694856] [ 31.695090] The buggy address belongs to the object at ffff88800d581cb0 [ 31.695090] which belongs to the cache vm_area_struct of size 168 [ 31.696559] The buggy address is located 88 bytes inside of [ 31.696559] freed 168-byte region [ffff88800d581cb0, ffff88800d581d58) [ 31.698016] [ 31.698237] The buggy address belongs to the physical page: [ 31.698893] page:000000002ac5b2c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd581 [ 31.699986] memcg:ffff88800d590301 [ 31.700419] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.701118] page_type: 0xffffffff() [ 31.701577] raw: 0100000000000200 ffff88800879fc80 ffffea000037a4c0 dead000000000002 [ 31.702514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d590301 [ 31.703433] page dumped because: kasan: bad access detected [ 31.704111] [ 31.704327] Memory state around the buggy address: [ 31.704914] ffff88800d581c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.705790] ffff88800d581c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.706666] >ffff88800d581d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.707532] ^ [ 31.707973] ffff88800d581d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.708864] ffff88800d581e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.709733] ================================================================== [ 31.710686] Disabling lock debugging due to kernel taint [ 34.099673] BUG: Bad rss-counter state mm:0000000064d8077e type:MM_FILEPAGES val:33 [ 34.100846] BUG: Bad rss-counter state mm:0000000064d8077e type:MM_ANONPAGES val:22 [ 34.533229] BUG: Bad rss-counter state mm:00000000060b51cf type:MM_FILEPAGES val:33 [ 34.534237] BUG: Bad rss-counter state mm:00000000060b51cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19682' (ECDSA) to the list of known hosts. 2023/06/19 20:15:42 fuzzer started 2023/06/19 20:15:42 dialing manager at localhost:44161 2023/06/19 20:15:42 checking machine... 2023/06/19 20:15:42 checking revisions... [ 35.263680] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:15:42 testing simple program... [ 35.317715] cgroup: Unknown subsys name 'net' [ 35.372627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:15:42 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=00007ffd9fdf1ea8 CR3=000000000d56e000 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=2032343a35313a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800984f6e8 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8450b64c RDI=ffff88800984f6f4 RBP=000000000000000c RSP=ffff88800984f600 R8 =0000000000000001 R9 =ffff88800984f660 R10=0000000000038001 R11=0000000000006397 R12=ffff88800984f6e8 R13=0000000000000000 R14=ffff888016bf8000 R15=ffff88800d603390 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f71508a4900 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=00007f714fcb0e10 CR3=0000000010024000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d6c291fbc3225aeb00000000000ae988 XMM05=04d2cfa4253caed90000000000136680 XMM06=e4cb8bb95a7664b600000000001351a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000