syzkaller login: [ 28.756938] BUG: Bad rss-counter state mm:000000007720e3de type:MM_FILEPAGES val:33 [ 28.758548] BUG: Bad rss-counter state mm:000000007720e3de type:MM_ANONPAGES val:22 [ 28.927491] ================================================================== [ 28.928570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.929511] Read of size 8 at addr ffff88800e117880 by task sshd/219 [ 28.930288] [ 28.930526] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.931396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.932404] Call Trace: [ 28.932722] [ 28.933010] dump_stack_lvl+0x91/0xf0 [ 28.933523] print_report+0xcc/0x620 [ 28.934014] ? __virt_addr_valid+0x102/0x340 [ 28.934586] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935224] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935857] kasan_report+0xbe/0xf0 [ 28.936351] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936981] vma_interval_tree_remove+0xc75/0xec0 [ 28.937596] vma_prepare+0xc54/0x11a0 [ 28.938106] __split_vma+0x5af/0x950 [ 28.938580] ? __pfx___split_vma+0x10/0x10 [ 28.939122] ? find_held_lock+0x2c/0x110 [ 28.939664] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.940246] ? lock_is_held_type+0x9f/0x120 [ 28.940787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.941409] ? mtree_range_walk+0x632/0x900 [ 28.941964] ? mas_walk+0x5c7/0x7c0 [ 28.942473] do_vmi_munmap+0x1f1/0x2b0 [ 28.942976] mmap_region+0x1f9/0x2660 [ 28.943487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.944023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.944748] ? __pfx_lock_acquire+0x10/0x10 [ 28.945289] ? __pfx_mmap_region+0x10/0x10 [ 28.945824] ? security_mmap_addr+0x7d/0xa0 [ 28.946368] ? get_unmapped_area+0x1f5/0x3f0 [ 28.946921] do_mmap+0x854/0xf00 [ 28.947381] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.947903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.948477] ksys_mmap_pgoff+0x3af/0x500 [ 28.948989] do_syscall_64+0x3f/0x90 [ 28.949489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950155] RIP: 0033:0x7fc0f17bfd82 [ 28.950616] 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 [ 28.952798] RSP: 002b:00007fffe4137298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.953712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0f17bfd82 [ 28.954563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0f0bf9000 [ 28.955423] RBP: 00007fc0f0bf9000 R08: 0000000000000009 R09: 0000000000001000 [ 28.956311] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c1831fec0 [ 28.957164] R13: 00007fffe41372b0 R14: 00007fffe41372e0 R15: 00007fffe4137640 [ 28.958028] [ 28.958324] [ 28.958538] Allocated by task 212: [ 28.958968] kasan_save_stack+0x22/0x50 [ 28.959520] kasan_set_track+0x25/0x30 [ 28.960032] __kasan_slab_alloc+0x59/0x70 [ 28.960560] kmem_cache_alloc+0x16b/0x370 [ 28.961088] vm_area_dup+0x20/0x160 [ 28.961549] __split_vma+0x170/0x950 [ 28.962023] split_vma+0xc6/0x110 [ 28.962468] mprotect_fixup+0x8d2/0xb30 [ 28.962968] do_mprotect_pkey+0x87e/0xd40 [ 28.963510] __x64_sys_mprotect+0x78/0xc0 [ 28.964042] do_syscall_64+0x3f/0x90 [ 28.964540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.965202] [ 28.965415] Freed by task 212: [ 28.965806] kasan_save_stack+0x22/0x50 [ 28.966323] kasan_set_track+0x25/0x30 [ 28.966817] kasan_save_free_info+0x2b/0x50 [ 28.967360] __kasan_slab_free+0x10a/0x190 [ 28.967910] kmem_cache_free+0x10d/0x4d0 [ 28.968436] rcu_core+0x8c8/0x2860 [ 28.968877] __do_softirq+0x1b7/0x7d4 [ 28.969450] [ 28.969665] Last potentially related work creation: [ 28.970262] kasan_save_stack+0x22/0x50 [ 28.970764] __kasan_record_aux_stack+0x8e/0xa0 [ 28.971353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.972022] remove_vma+0x139/0x170 [ 28.972492] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.973065] do_vmi_munmap+0x1f1/0x2b0 [ 28.973554] __vm_munmap+0x138/0x3a0 [ 28.974033] __x64_sys_munmap+0x59/0x80 [ 28.974539] do_syscall_64+0x3f/0x90 [ 28.975030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975701] [ 28.975922] Second to last potentially related work creation: [ 28.976634] kasan_save_stack+0x22/0x50 [ 28.977160] __kasan_record_aux_stack+0x8e/0xa0 [ 28.977731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.978400] remove_vma+0x139/0x170 [ 28.978854] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.979455] do_vmi_munmap+0x1f1/0x2b0 [ 28.979946] mmap_region+0x1f9/0x2660 [ 28.980440] do_mmap+0x854/0xf00 [ 28.980867] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.981388] ksys_mmap_pgoff+0x7d/0x500 [ 28.981903] do_syscall_64+0x3f/0x90 [ 28.982400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.983068] [ 28.983287] The buggy address belongs to the object at ffff88800e117828 [ 28.983287] which belongs to the cache vm_area_struct of size 168 [ 28.984822] The buggy address is located 88 bytes inside of [ 28.984822] freed 168-byte region [ffff88800e117828, ffff88800e1178d0) [ 28.986301] [ 28.986527] The buggy address belongs to the physical page: [ 28.987209] page:00000000e871ea74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe117 [ 28.988345] memcg:ffff88800e9a9e01 [ 28.988772] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.989492] page_type: 0xffffffff() [ 28.989948] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.990912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9a9e01 [ 28.991859] page dumped because: kasan: bad access detected [ 28.992536] [ 28.992753] Memory state around the buggy address: [ 28.993359] ffff88800e117780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.994243] ffff88800e117800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.995135] >ffff88800e117880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.996011] ^ [ 28.996439] ffff88800e117900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.997343] ffff88800e117980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.998274] ================================================================== [ 28.999217] Disabling lock debugging due to kernel taint [ 30.960664] BUG: Bad rss-counter state mm:000000002fdcc8a3 type:MM_FILEPAGES val:33 [ 30.961663] BUG: Bad rss-counter state mm:000000002fdcc8a3 type:MM_ANONPAGES val:22 [ 31.509934] BUG: Bad rss-counter state mm:0000000053219d82 type:MM_FILEPAGES val:33 [ 31.511588] BUG: Bad rss-counter state mm:0000000053219d82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21860' (ECDSA) to the list of known hosts. 2023/06/20 19:59:53 fuzzer started 2023/06/20 19:59:53 dialing manager at localhost:36067 2023/06/20 19:59:53 checking machine... 2023/06/20 19:59:53 checking revisions... [ 32.206277] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:59:54 testing simple program... [ 32.250319] cgroup: Unknown subsys name 'net' [ 32.296184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f3bff107650 CR3=000000000e728000 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=2033353a39353a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10011b4f41 RBX=1ffff110011b4f41 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf293d8 RBP=0000000000000001 RSP=ffff888008da79f8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000003 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf293d8 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000086 [--S--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=00007f3bff6a6044 CR3=000000001a2de000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c3850146d72657420322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000