syzkaller login: [ 23.874459] BUG: Bad rss-counter state mm:00000000daf967d7 type:MM_FILEPAGES val:33 [ 23.875680] BUG: Bad rss-counter state mm:00000000daf967d7 type:MM_ANONPAGES val:22 [ 23.918357] ================================================================== [ 23.919497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.920524] Read of size 8 at addr ffff88800e2e6140 by task sshd/219 [ 23.921377] [ 23.921617] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.922555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.923628] Call Trace: [ 23.923977] [ 23.924301] dump_stack_lvl+0x91/0xf0 [ 23.924836] print_report+0xcc/0x620 [ 23.925368] ? __virt_addr_valid+0x102/0x340 [ 23.925973] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.926649] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.927309] kasan_report+0xbe/0xf0 [ 23.927829] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.928540] vma_interval_tree_remove+0xc75/0xec0 [ 23.929214] vma_prepare+0xc54/0x11a0 [ 23.929755] __split_vma+0x5af/0x950 [ 23.930294] ? __pfx___split_vma+0x10/0x10 [ 23.930887] ? find_held_lock+0x2c/0x110 [ 23.931482] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.932127] ? lock_is_held_type+0x9f/0x120 [ 23.932737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.933450] ? mtree_range_walk+0x632/0x900 [ 23.934074] ? mas_walk+0x5c7/0x7c0 [ 23.934606] do_vmi_munmap+0x1f1/0x2b0 [ 23.935161] mmap_region+0x1f9/0x2660 [ 23.935704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.936286] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.937081] ? __pfx_lock_acquire+0x10/0x10 [ 23.937674] ? __pfx_mmap_region+0x10/0x10 [ 23.938272] ? security_mmap_addr+0x7d/0xa0 [ 23.938848] ? get_unmapped_area+0x1f5/0x3f0 [ 23.939460] do_mmap+0x854/0xf00 [ 23.939958] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.940534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.941165] ksys_mmap_pgoff+0x3af/0x500 [ 23.941728] do_syscall_64+0x3f/0x90 [ 23.942260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.942964] RIP: 0033:0x7f7389ef5d82 [ 23.943472] 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 [ 23.945800] RSP: 002b:00007ffc56140b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.946798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7389ef5d82 [ 23.947731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f738932f000 [ 23.948682] RBP: 00007f738932f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.949614] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb67d17d90 [ 23.950573] R13: 00007ffc56140b90 R14: 00007ffc56140bc0 R15: 00007ffc56140f20 [ 23.951533] [ 23.951851] [ 23.952094] Allocated by task 212: [ 23.952559] kasan_save_stack+0x22/0x50 [ 23.953125] kasan_set_track+0x25/0x30 [ 23.953675] __kasan_slab_alloc+0x59/0x70 [ 23.954260] kmem_cache_alloc+0x16b/0x370 [ 23.954869] vm_area_dup+0x20/0x160 [ 23.955401] __split_vma+0x170/0x950 [ 23.955932] split_vma+0xc6/0x110 [ 23.956456] mprotect_fixup+0x8d2/0xb30 [ 23.957030] do_mprotect_pkey+0x87e/0xd40 [ 23.957614] __x64_sys_mprotect+0x78/0xc0 [ 23.958194] do_syscall_64+0x3f/0x90 [ 23.958722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959436] [ 23.959677] Freed by task 212: [ 23.960122] kasan_save_stack+0x22/0x50 [ 23.960693] kasan_set_track+0x25/0x30 [ 23.961290] kasan_save_free_info+0x2b/0x50 [ 23.961921] __kasan_slab_free+0x10a/0x190 [ 23.962563] kmem_cache_free+0x10d/0x4d0 [ 23.963166] rcu_core+0x8c8/0x2860 [ 23.963731] __do_softirq+0x1b7/0x7d4 [ 23.964324] [ 23.964566] Last potentially related work creation: [ 23.965225] kasan_save_stack+0x22/0x50 [ 23.965792] __kasan_record_aux_stack+0x8e/0xa0 [ 23.966435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.967149] remove_vma+0x139/0x170 [ 23.967657] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.968276] do_vmi_munmap+0x1f1/0x2b0 [ 23.968814] __vm_munmap+0x138/0x3a0 [ 23.969330] __x64_sys_munmap+0x59/0x80 [ 23.969883] do_syscall_64+0x3f/0x90 [ 23.970419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.971136] [ 23.971376] Second to last potentially related work creation: [ 23.972145] kasan_save_stack+0x22/0x50 [ 23.972699] __kasan_record_aux_stack+0x8e/0xa0 [ 23.973337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.974052] remove_vma+0x139/0x170 [ 23.974555] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.975175] do_vmi_munmap+0x1f1/0x2b0 [ 23.975719] mmap_region+0x1f9/0x2660 [ 23.976268] do_mmap+0x854/0xf00 [ 23.976750] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.977292] ksys_mmap_pgoff+0x3af/0x500 [ 23.977847] do_syscall_64+0x3f/0x90 [ 23.978381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.979090] [ 23.979331] The buggy address belongs to the object at ffff88800e2e60e8 [ 23.979331] which belongs to the cache vm_area_struct of size 168 [ 23.980966] The buggy address is located 88 bytes inside of [ 23.980966] freed 168-byte region [ffff88800e2e60e8, ffff88800e2e6190) [ 23.982515] [ 23.982757] The buggy address belongs to the physical page: [ 23.983489] page:000000004cde744b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2e6 [ 23.984699] memcg:ffff88800e282201 [ 23.985170] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.985971] page_type: 0xffffffff() [ 23.986485] raw: 0100000000000200 ffff8880087a0c80 ffffea00003786c0 dead000000000005 [ 23.987531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e282201 [ 23.988543] page dumped because: kasan: bad access detected [ 23.989271] [ 23.989513] Memory state around the buggy address: [ 23.990147] ffff88800e2e6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.991116] ffff88800e2e6080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.992075] >ffff88800e2e6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.993038] ^ [ 23.993764] ffff88800e2e6180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.994707] ffff88800e2e6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.995681] ================================================================== [ 23.996806] Disabling lock debugging due to kernel taint [ 26.464134] BUG: Bad rss-counter state mm:000000008103d11e type:MM_FILEPAGES val:33 [ 26.465279] BUG: Bad rss-counter state mm:000000008103d11e type:MM_ANONPAGES val:22 [ 26.980273] BUG: Bad rss-counter state mm:00000000b8f05ecd type:MM_FILEPAGES val:33 [ 26.981419] BUG: Bad rss-counter state mm:00000000b8f05ecd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18393' (ECDSA) to the list of known hosts. 2023/06/20 14:55:15 fuzzer started 2023/06/20 14:55:15 dialing manager at localhost:36067 2023/06/20 14:55:15 checking machine... 2023/06/20 14:55:15 checking revisions... [ 27.629532] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:55:15 testing simple program... [ 27.677696] cgroup: Unknown subsys name 'net' [ 27.730348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:55:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3501 RDX=1ffff11001b4cf32 RSI=ffffffff8450cc7f RDI=ffff88800da67938 RBP=ffff88800da67990 RSP=ffff88800da678c8 R8 =ffffffff863b3588 R9 =ffff88800da67978 R10=0000000000038001 R11=000000000008a96a R12=ffff88800da67a00 R13=0000000000000000 R14=ffff888015ce9b40 R15=ffff88800da67938 RIP=ffffffff8113062c 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 00007fd1675a8900 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=00007ffe78ae9000 CR3=000000000e134000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f5e1427cf20 CR3=000000000d658000 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=fb95ca2d2a60ad8aba4c090d4bb2780c XMM02=0000000000119b98ec2efd57dc4c00df XMM03=0000000000120de84eb254f9dd4594bc XMM04=4c3bb4ef153d059800000000000ae988 XMM05=0ffe95cddf8bfd190000000000132738 XMM06=806171799158d9670000000000131ea8 XMM07=e042d86d42eb936e0000000000121068 XMM08=4eb254f9dd4594bc0000000000119bf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000