syzkaller login: [ 30.557160] BUG: Bad rss-counter state mm:00000000e2a66b72 type:MM_FILEPAGES val:33 [ 30.558506] BUG: Bad rss-counter state mm:00000000e2a66b72 type:MM_ANONPAGES val:22 [ 30.735583] ================================================================== [ 30.736165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.736764] Read of size 8 at addr ffff88800e198a50 by task sshd/220 [ 30.737275] [ 30.737444] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.737987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.738644] Call Trace: [ 30.738849] [ 30.739031] dump_stack_lvl+0x91/0xf0 [ 30.739363] print_report+0xcc/0x620 [ 30.739682] ? __virt_addr_valid+0x102/0x340 [ 30.740033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740857] kasan_report+0xbe/0xf0 [ 30.744055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744551] vma_interval_tree_remove+0xc75/0xec0 [ 30.744952] vma_prepare+0xc54/0x11a0 [ 30.745810] __split_vma+0x5af/0x950 [ 30.746112] ? __pfx___split_vma+0x10/0x10 [ 30.746990] ? find_held_lock+0x2c/0x110 [ 30.747348] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747806] ? lock_is_held_type+0x9f/0x120 [ 30.748155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.748628] ? mtree_range_walk+0x632/0x900 [ 30.749606] ? mas_walk+0x5c7/0x7c0 [ 30.749916] do_vmi_munmap+0x1f1/0x2b0 [ 30.750233] mmap_region+0x1f9/0x2660 [ 30.750661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750988] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.751530] ? __pfx_lock_acquire+0x10/0x10 [ 30.751874] ? __pfx_mmap_region+0x10/0x10 [ 30.752215] ? security_mmap_addr+0x7d/0xa0 [ 30.752671] ? get_unmapped_area+0x1f5/0x3f0 [ 30.755852] do_mmap+0x854/0xf00 [ 30.756147] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.756496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.756852] ksys_mmap_pgoff+0x3af/0x500 [ 30.757190] do_syscall_64+0x3f/0x90 [ 30.757531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757962] RIP: 0033:0x7f4b41015d82 [ 30.758250] 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 [ 30.759603] RSP: 002b:00007ffd8f683ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b41015d82 [ 30.762966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b4044f000 [ 30.764659] RBP: 00007f4b4044f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.766305] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a6793aec0 [ 30.768012] R13: 00007ffd8f683f00 R14: 00007ffd8f683f30 R15: 00007ffd8f684290 [ 30.769740] [ 30.770347] [ 30.770534] Allocated by task 211: [ 30.770832] kasan_save_stack+0x22/0x50 [ 30.771187] kasan_set_track+0x25/0x30 [ 30.771589] __kasan_slab_alloc+0x59/0x70 [ 30.771965] kmem_cache_alloc+0x16b/0x370 [ 30.772319] vm_area_dup+0x20/0x160 [ 30.772668] __split_vma+0x170/0x950 [ 30.773397] split_vma+0xc6/0x110 [ 30.773759] mprotect_fixup+0x8d2/0xb30 [ 30.774087] do_mprotect_pkey+0x87e/0xd40 [ 30.774456] __x64_sys_mprotect+0x78/0xc0 [ 30.774810] do_syscall_64+0x3f/0x90 [ 30.775107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775542] [ 30.775693] Freed by task 211: [ 30.775939] kasan_save_stack+0x22/0x50 [ 30.776315] kasan_set_track+0x25/0x30 [ 30.776711] kasan_save_free_info+0x2b/0x50 [ 30.777103] __kasan_slab_free+0x10a/0x190 [ 30.777447] kmem_cache_free+0x10d/0x4d0 [ 30.777774] rcu_core+0x8c8/0x2860 [ 30.778101] __do_softirq+0x1b7/0x7d4 [ 30.778556] [ 30.778684] Last potentially related work creation: [ 30.779023] kasan_save_stack+0x22/0x50 [ 30.779328] __kasan_record_aux_stack+0x8e/0xa0 [ 30.779709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.780086] remove_vma+0x139/0x170 [ 30.780350] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780699] do_vmi_munmap+0x1f1/0x2b0 [ 30.781019] __vm_munmap+0x138/0x3a0 [ 30.781370] __x64_sys_munmap+0x59/0x80 [ 30.781696] do_syscall_64+0x3f/0x90 [ 30.781999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782412] [ 30.782534] Second to last potentially related work creation: [ 30.782869] kasan_save_stack+0x22/0x50 [ 30.783129] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.783797] remove_vma+0x139/0x170 [ 30.784034] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784329] do_vmi_munmap+0x1f1/0x2b0 [ 30.784602] mmap_region+0x1f9/0x2660 [ 30.784847] do_mmap+0x854/0xf00 [ 30.785125] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785380] ksys_mmap_pgoff+0x3af/0x500 [ 30.785688] do_syscall_64+0x3f/0x90 [ 30.785948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786286] [ 30.786395] The buggy address belongs to the object at ffff88800e1989f8 [ 30.786395] which belongs to the cache vm_area_struct of size 168 [ 30.787207] The buggy address is located 88 bytes inside of [ 30.787207] freed 168-byte region [ffff88800e1989f8, ffff88800e198aa0) [ 30.787948] [ 30.788060] The buggy address belongs to the physical page: [ 30.788434] page:00000000321fe621 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe198 [ 30.789137] memcg:ffff88800e14a301 [ 30.789731] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.790165] page_type: 0xffffffff() [ 30.790488] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375200 dead000000000004 [ 30.791215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e14a301 [ 30.791841] page dumped because: kasan: bad access detected [ 30.792176] [ 30.792297] Memory state around the buggy address: [ 30.792617] ffff88800e198900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.793083] ffff88800e198980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.793533] >ffff88800e198a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.793978] ^ [ 30.794332] ffff88800e198a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.794784] ffff88800e198b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.795201] ================================================================== [ 30.795779] Disabling lock debugging due to kernel taint [ 33.832042] BUG: Bad rss-counter state mm:0000000075a7c661 type:MM_FILEPAGES val:33 [ 33.833199] BUG: Bad rss-counter state mm:0000000075a7c661 type:MM_ANONPAGES val:22 [ 34.494221] BUG: Bad rss-counter state mm:0000000015bc8b4c type:MM_FILEPAGES val:33 [ 34.495843] BUG: Bad rss-counter state mm:0000000015bc8b4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52974' (ECDSA) to the list of known hosts. 2023/06/21 10:02:49 fuzzer started 2023/06/21 10:02:50 dialing manager at localhost:36067 2023/06/21 10:02:50 checking machine... 2023/06/21 10:02:50 checking revisions... [ 35.415626] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:02:50 testing simple program... [ 35.465925] cgroup: Unknown subsys name 'net' [ 35.525806] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:49 Registers: info registers vcpu 0 RAX=0000000080010050 RBX=ffff88800c4f0000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800c4f0000 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=ffff88806ce09ff8 R12=00000000000101f7 R13=ffff88800c4f0180 R14=ffff88800c4f44c8 R15=ffff88800c4f0008 RIP=ffffffff8219168f 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 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=00007ffa7466e328 CR3=00000000142cc000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7473207265746e756f632d7373722064 XMM04=61203530203763203030206631206630 XMM05=6666206666203066203030206433203e XMM06=30302039302038622066652039382038 XMM07=00000000000000000000000000000000 XMM08=6c61762053454741504e4f4e415f4d4d XMM09=00000000000000000000000000000000 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=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f1f76f7f6e0 CR3=000000000c6f2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000