syzkaller login: [ 30.486121] BUG: Bad rss-counter state mm:000000006f012e19 type:MM_FILEPAGES val:33 [ 30.487398] BUG: Bad rss-counter state mm:000000006f012e19 type:MM_ANONPAGES val:22 [ 30.643075] ================================================================== [ 30.644018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.644995] Read of size 8 at addr ffff88800cacc228 by task sshd/220 [ 30.645768] [ 30.645997] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.647073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.648072] Call Trace: [ 30.648399] [ 30.648691] dump_stack_lvl+0x91/0xf0 [ 30.649221] print_report+0xcc/0x620 [ 30.649709] ? __virt_addr_valid+0x102/0x340 [ 30.650276] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650940] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.651586] kasan_report+0xbe/0xf0 [ 30.652088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.652726] vma_interval_tree_remove+0xc75/0xec0 [ 30.653365] vma_prepare+0xc54/0x11a0 [ 30.653857] __split_vma+0x5af/0x950 [ 30.654361] ? __pfx___split_vma+0x10/0x10 [ 30.654902] ? find_held_lock+0x2c/0x110 [ 30.655456] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.656058] ? lock_is_held_type+0x9f/0x120 [ 30.656606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.657260] ? mtree_range_walk+0x632/0x900 [ 30.657826] ? mas_walk+0x5c7/0x7c0 [ 30.658350] do_vmi_munmap+0x1f1/0x2b0 [ 30.658858] mmap_region+0x1f9/0x2660 [ 30.659368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.659899] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.660645] ? __pfx_lock_acquire+0x10/0x10 [ 30.661199] ? __pfx_mmap_region+0x10/0x10 [ 30.661740] ? security_mmap_addr+0x7d/0xa0 [ 30.662292] ? get_unmapped_area+0x1f5/0x3f0 [ 30.662876] do_mmap+0x854/0xf00 [ 30.663347] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.663847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.664433] ksys_mmap_pgoff+0x3af/0x500 [ 30.664955] do_syscall_64+0x3f/0x90 [ 30.665455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.666138] RIP: 0033:0x7f3f25195d82 [ 30.666626] 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 [ 30.668872] RSP: 002b:00007ffdf1f53148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.669825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f25195d82 [ 30.670737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f245cf000 [ 30.671644] RBP: 00007f3f245cf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.672543] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c61a362f70 [ 30.673433] R13: 00007ffdf1f53160 R14: 00007ffdf1f53190 R15: 00007ffdf1f534f0 [ 30.674354] [ 30.674664] [ 30.674888] Allocated by task 213: [ 30.675358] kasan_save_stack+0x22/0x50 [ 30.675885] kasan_set_track+0x25/0x30 [ 30.676416] __kasan_slab_alloc+0x59/0x70 [ 30.676975] kmem_cache_alloc+0x16b/0x370 [ 30.677514] vm_area_dup+0x20/0x160 [ 30.678000] __split_vma+0x170/0x950 [ 30.678491] split_vma+0xc6/0x110 [ 30.678949] mprotect_fixup+0x8d2/0xb30 [ 30.679494] do_mprotect_pkey+0x87e/0xd40 [ 30.680047] __x64_sys_mprotect+0x78/0xc0 [ 30.680591] do_syscall_64+0x3f/0x90 [ 30.681090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.681748] [ 30.681978] Freed by task 213: [ 30.682390] kasan_save_stack+0x22/0x50 [ 30.682903] kasan_set_track+0x25/0x30 [ 30.683428] kasan_save_free_info+0x2b/0x50 [ 30.683983] __kasan_slab_free+0x10a/0x190 [ 30.684524] kmem_cache_free+0x10d/0x4d0 [ 30.685052] rcu_core+0x8c8/0x2860 [ 30.685506] __do_softirq+0x1b7/0x7d4 [ 30.685999] [ 30.686220] Last potentially related work creation: [ 30.686825] kasan_save_stack+0x22/0x50 [ 30.687362] __kasan_record_aux_stack+0x8e/0xa0 [ 30.687994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.688649] remove_vma+0x139/0x170 [ 30.689112] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.689672] do_vmi_munmap+0x1f1/0x2b0 [ 30.690175] __vm_munmap+0x138/0x3a0 [ 30.690668] __x64_sys_munmap+0x59/0x80 [ 30.691200] do_syscall_64+0x3f/0x90 [ 30.691692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692369] [ 30.692592] Second to last potentially related work creation: [ 30.693318] kasan_save_stack+0x22/0x50 [ 30.693839] __kasan_record_aux_stack+0x8e/0xa0 [ 30.694463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.695144] remove_vma+0x139/0x170 [ 30.695610] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.696195] do_vmi_munmap+0x1f1/0x2b0 [ 30.696698] mmap_region+0x1f9/0x2660 [ 30.697204] do_mmap+0x854/0xf00 [ 30.697648] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.698166] ksys_mmap_pgoff+0x3af/0x500 [ 30.698696] do_syscall_64+0x3f/0x90 [ 30.699209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.699874] [ 30.700119] The buggy address belongs to the object at ffff88800cacc1d0 [ 30.700119] which belongs to the cache vm_area_struct of size 168 [ 30.701622] The buggy address is located 88 bytes inside of [ 30.701622] freed 168-byte region [ffff88800cacc1d0, ffff88800cacc278) [ 30.703112] [ 30.703335] The buggy address belongs to the physical page: [ 30.704008] page:00000000a2de5232 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcacc [ 30.705119] memcg:ffff88800cacd001 [ 30.705550] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.706226] page_type: 0xffffffff() [ 30.706698] raw: 0100000000000200 ffff8880087a0c80 ffffea000032b000 0000000000000006 [ 30.707685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cacd001 [ 30.708622] page dumped because: kasan: bad access detected [ 30.709314] [ 30.709535] Memory state around the buggy address: [ 30.710138] ffff88800cacc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.711044] ffff88800cacc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.711907] >ffff88800cacc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.712794] ^ [ 30.713364] ffff88800cacc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.714259] ffff88800cacc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.715169] ================================================================== [ 30.716142] Disabling lock debugging due to kernel taint [ 32.720079] BUG: Bad rss-counter state mm:00000000224f4aef type:MM_FILEPAGES val:33 [ 32.721075] BUG: Bad rss-counter state mm:00000000224f4aef type:MM_ANONPAGES val:22 [ 33.263101] BUG: Bad rss-counter state mm:00000000d5ed49ce type:MM_FILEPAGES val:33 [ 33.264661] BUG: Bad rss-counter state mm:00000000d5ed49ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5813' (ECDSA) to the list of known hosts. 2023/06/21 02:00:39 fuzzer started 2023/06/21 02:00:40 dialing manager at localhost:36067 2023/06/21 02:00:40 checking machine... 2023/06/21 02:00:40 checking revisions... [ 34.052327] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:00:40 testing simple program... [ 34.107639] cgroup: Unknown subsys name 'net' [ 34.159290] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=000000000001c060 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f2f0000 RSP=ffff88806ce09790 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000000 R12=000000000001c060 R13=ffff88800f2f44c8 R14=ffff88800f2f0234 R15=0000000000000001 RIP=ffffffff82191d9e 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 00007f23bdf03900 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=00007f23bd423000 CR3=000000000c756000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6a723eebc08cd2d400000000000ae988 XMM05=24272f006d77bb6d0000000000134e90 XMM06=4fda316b135da52b0000000000133f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864ab912 RBX=0000000000000001 RCX=ffffffff844c5a23 RDX=0000000000000000 RSI=ffffffff864ab912 RDI=ffffffff8604a720 RBP=ffff88801cde71b0 RSP=ffff88801cde70e0 R8 =ffffffff864ab912 R9 =ffff88801cde7198 R10=0000000000038001 R11=00000000000b3f57 R12=ffff88801cde71b8 R13=ffff88801cde71a0 R14=ffff88801cde7199 R15=ffff88801cde7158 RIP=ffffffff8112fcc1 RFL=00000282 [--S----] 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 00007f693234b900 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=00007f693232a020 CR3=000000000ca90000 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