syzkaller login: [ 35.721614] BUG: Bad rss-counter state mm:00000000824677f8 type:MM_FILEPAGES val:33 [ 35.722965] BUG: Bad rss-counter state mm:00000000824677f8 type:MM_ANONPAGES val:22 [ 35.888477] ================================================================== [ 35.889494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.890424] Read of size 8 at addr ffff888015ee2df0 by task sshd/220 [ 35.891243] [ 35.891461] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.892328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.893314] Call Trace: [ 35.893634] [ 35.893918] dump_stack_lvl+0x91/0xf0 [ 35.894408] print_report+0xcc/0x620 [ 35.894892] ? __virt_addr_valid+0x102/0x340 [ 35.895443] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.896069] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.896677] kasan_report+0xbe/0xf0 [ 35.897152] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.897777] vma_interval_tree_remove+0xc75/0xec0 [ 35.898401] vma_prepare+0xc54/0x11a0 [ 35.898894] __split_vma+0x5af/0x950 [ 35.899369] ? __pfx___split_vma+0x10/0x10 [ 35.900007] ? find_held_lock+0x2c/0x110 [ 35.900625] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.901193] ? lock_is_held_type+0x9f/0x120 [ 35.901759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.902362] ? mtree_range_walk+0x632/0x900 [ 35.902926] ? mas_walk+0x5c7/0x7c0 [ 35.903395] do_vmi_munmap+0x1f1/0x2b0 [ 35.903902] mmap_region+0x1f9/0x2660 [ 35.904400] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.904926] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.905675] ? __pfx_lock_acquire+0x10/0x10 [ 35.906210] ? __pfx_mmap_region+0x10/0x10 [ 35.906761] ? security_mmap_addr+0x7d/0xa0 [ 35.907290] ? get_unmapped_area+0x1f5/0x3f0 [ 35.907856] do_mmap+0x854/0xf00 [ 35.908308] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.908822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.909385] ksys_mmap_pgoff+0x3af/0x500 [ 35.909912] do_syscall_64+0x3f/0x90 [ 35.910395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.911060] RIP: 0033:0x7f88da54bd82 [ 35.911515] 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 [ 35.913697] RSP: 002b:00007ffdd4a4cc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.914595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88da54bd82 [ 35.915432] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88d9985000 [ 35.916281] RBP: 00007f88d9985000 R08: 0000000000000009 R09: 0000000000001000 [ 35.917115] R10: 0000000000000812 R11: 0000000000000206 R12: 000055649af9ed90 [ 35.917949] R13: 00007ffdd4a4ccb0 R14: 00007ffdd4a4cce0 R15: 00007ffdd4a4d040 [ 35.918798] [ 35.919086] [ 35.919300] Allocated by task 213: [ 35.919730] kasan_save_stack+0x22/0x50 [ 35.920242] kasan_set_track+0x25/0x30 [ 35.920772] __kasan_slab_alloc+0x59/0x70 [ 35.921288] kmem_cache_alloc+0x16b/0x370 [ 35.921800] vm_area_dup+0x20/0x160 [ 35.922250] __split_vma+0x170/0x950 [ 35.922726] split_vma+0xc6/0x110 [ 35.923173] mprotect_fixup+0x8d2/0xb30 [ 35.923678] do_mprotect_pkey+0x87e/0xd40 [ 35.924214] __x64_sys_mprotect+0x78/0xc0 [ 35.924729] do_syscall_64+0x3f/0x90 [ 35.925198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.925828] [ 35.926043] Freed by task 213: [ 35.926434] kasan_save_stack+0x22/0x50 [ 35.926937] kasan_set_track+0x25/0x30 [ 35.927424] kasan_save_free_info+0x2b/0x50 [ 35.927949] __kasan_slab_free+0x10a/0x190 [ 35.928493] kmem_cache_free+0x10d/0x4d0 [ 35.928993] rcu_core+0x8c8/0x2860 [ 35.929433] __do_softirq+0x1b7/0x7d4 [ 35.929903] [ 35.930117] Last potentially related work creation: [ 35.930694] kasan_save_stack+0x22/0x50 [ 35.931193] __kasan_record_aux_stack+0x8e/0xa0 [ 35.931763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.932413] remove_vma+0x139/0x170 [ 35.932858] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.933417] do_vmi_munmap+0x1f1/0x2b0 [ 35.933897] __vm_munmap+0x138/0x3a0 [ 35.934361] __x64_sys_munmap+0x59/0x80 [ 35.934848] do_syscall_64+0x3f/0x90 [ 35.935315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.935953] [ 35.936174] The buggy address belongs to the object at ffff888015ee2d98 [ 35.936174] which belongs to the cache vm_area_struct of size 168 [ 35.937610] The buggy address is located 88 bytes inside of [ 35.937610] freed 168-byte region [ffff888015ee2d98, ffff888015ee2e40) [ 35.938993] [ 35.939212] The buggy address belongs to the physical page: [ 35.939857] page:00000000a1843f05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ee2 [ 35.941005] memcg:ffff88801a40ba01 [ 35.941426] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.942060] page_type: 0xffffffff() [ 35.942506] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.943409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a40ba01 [ 35.944319] page dumped because: kasan: bad access detected [ 35.944967] [ 35.945183] Memory state around the buggy address: [ 35.945760] ffff888015ee2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 35.946602] ffff888015ee2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 35.947444] >ffff888015ee2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.948279] ^ [ 35.949080] ffff888015ee2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.949918] ffff888015ee2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.950755] ================================================================== [ 35.951714] Disabling lock debugging due to kernel taint [ 37.896922] BUG: Bad rss-counter state mm:00000000e8ac834d type:MM_FILEPAGES val:33 [ 37.898027] BUG: Bad rss-counter state mm:00000000e8ac834d type:MM_ANONPAGES val:22 [ 38.444318] BUG: Bad rss-counter state mm:00000000126befec type:MM_FILEPAGES val:33 [ 38.445335] BUG: Bad rss-counter state mm:00000000126befec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13904' (ECDSA) to the list of known hosts. 2023/06/19 13:04:58 fuzzer started 2023/06/19 13:04:59 dialing manager at localhost:44161 2023/06/19 13:04:59 checking machine... 2023/06/19 13:04:59 checking revisions... [ 39.124803] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:04:59 testing simple program... [ 39.179295] cgroup: Unknown subsys name 'net' [ 39.231202] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:53 Registers: info registers vcpu 0 RAX=1ffffffff0bc171b RBX=ffffffff85e0b8dc RCX=ffffffff818e8f19 RDX=0000000000000000 RSI=ffffffff8614db4c RDI=ffffffff85e0b8d4 RBP=ffffffff85e0b8d4 RSP=ffff88806ce099e0 R8 =ffffffff8614db4c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024940 R12=ffffffff85e0b8e8 R13=ffffffff85e0b8d4 R14=ffffffff85e0b8d4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fad88da3900 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=00007fff68860000 CR3=000000000f288000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f1dbe82fea0 CR3=0000000016af6000 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=2038353a34303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000