syzkaller login: [ 42.660732] sshd (213) used greatest stack depth: 24128 bytes left [ 42.661373] BUG: Bad rss-counter state mm:0000000014f42790 type:MM_FILEPAGES val:33 [ 42.662116] BUG: Bad rss-counter state mm:0000000014f42790 type:MM_ANONPAGES val:22 [ 42.771761] ================================================================== [ 42.772463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.773139] Read of size 8 at addr ffff888016addd08 by task sshd/221 [ 42.773701] [ 42.773857] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.774478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.775220] Call Trace: [ 42.775449] [ 42.775656] dump_stack_lvl+0x91/0xf0 [ 42.776121] print_report+0xcc/0x620 [ 42.776534] ? __virt_addr_valid+0x102/0x340 [ 42.776942] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.777390] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.777832] kasan_report+0xbe/0xf0 [ 42.778170] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.778629] vma_interval_tree_remove+0xc75/0xec0 [ 42.779068] vma_prepare+0xc54/0x11a0 [ 42.779420] __split_vma+0x5af/0x950 [ 42.779754] ? __pfx___split_vma+0x10/0x10 [ 42.780139] ? find_held_lock+0x2c/0x110 [ 42.780514] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.780941] ? lock_is_held_type+0x9f/0x120 [ 42.781339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.781791] ? mtree_range_walk+0x632/0x900 [ 42.782188] ? mas_walk+0x5c7/0x7c0 [ 42.782532] do_vmi_munmap+0x1f1/0x2b0 [ 42.782897] mmap_region+0x1f9/0x2660 [ 42.783239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.783621] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.784144] ? __pfx_lock_acquire+0x10/0x10 [ 42.784527] ? __pfx_mmap_region+0x10/0x10 [ 42.784912] ? security_mmap_addr+0x7d/0xa0 [ 42.785289] ? get_unmapped_area+0x1f5/0x3f0 [ 42.785679] do_mmap+0x854/0xf00 [ 42.786003] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.786357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.786752] ksys_mmap_pgoff+0x3af/0x500 [ 42.787120] do_syscall_64+0x3f/0x90 [ 42.787494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.787959] RIP: 0033:0x7fe3c0d74d82 [ 42.788280] 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 [ 42.789786] RSP: 002b:00007ffd03cc5988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.790436] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3c0d74d82 [ 42.791040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3c01ae000 [ 42.791679] RBP: 00007fe3c01ae000 R08: 0000000000000009 R09: 0000000000001000 [ 42.792308] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557dcdeb8f70 [ 42.792929] R13: 00007ffd03cc59a0 R14: 00007ffd03cc59d0 R15: 00007ffd03cc5d30 [ 42.793549] [ 42.793767] [ 42.793926] Allocated by task 213: [ 42.794242] kasan_save_stack+0x22/0x50 [ 42.794605] kasan_set_track+0x25/0x30 [ 42.794970] __kasan_slab_alloc+0x59/0x70 [ 42.795364] kmem_cache_alloc+0x16b/0x370 [ 42.795734] vm_area_dup+0x20/0x160 [ 42.796064] __split_vma+0x170/0x950 [ 42.796415] split_vma+0xc6/0x110 [ 42.796735] mprotect_fixup+0x8d2/0xb30 [ 42.797090] do_mprotect_pkey+0x87e/0xd40 [ 42.797461] __x64_sys_mprotect+0x78/0xc0 [ 42.797839] do_syscall_64+0x3f/0x90 [ 42.798183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.798653] [ 42.798802] Freed by task 213: [ 42.799090] kasan_save_stack+0x22/0x50 [ 42.799482] kasan_set_track+0x25/0x30 [ 42.799830] kasan_save_free_info+0x2b/0x50 [ 42.800210] __kasan_slab_free+0x10a/0x190 [ 42.800595] kmem_cache_free+0x10d/0x4d0 [ 42.800963] rcu_core+0x8c8/0x2860 [ 42.801278] __do_softirq+0x1b7/0x7d4 [ 42.801629] [ 42.801778] Last potentially related work creation: [ 42.802204] kasan_save_stack+0x22/0x50 [ 42.802563] __kasan_record_aux_stack+0x8e/0xa0 [ 42.802988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.803454] remove_vma+0x139/0x170 [ 42.803780] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.804180] do_vmi_munmap+0x1f1/0x2b0 [ 42.804525] __vm_munmap+0x138/0x3a0 [ 42.804860] __x64_sys_munmap+0x59/0x80 [ 42.805216] do_syscall_64+0x3f/0x90 [ 42.805542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.805999] [ 42.806153] The buggy address belongs to the object at ffff888016addcb0 [ 42.806153] which belongs to the cache vm_area_struct of size 168 [ 42.807195] The buggy address is located 88 bytes inside of [ 42.807195] freed 168-byte region [ffff888016addcb0, ffff888016addd58) [ 42.808202] [ 42.808353] The buggy address belongs to the physical page: [ 42.808825] page:00000000d2eca715 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16add [ 42.809591] memcg:ffff88800c709d01 [ 42.809893] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.810343] page_type: 0xffffffff() [ 42.810661] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.811348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c709d01 [ 42.811990] page dumped because: kasan: bad access detected [ 42.812456] [ 42.812604] Memory state around the buggy address: [ 42.813013] ffff888016addc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.813611] ffff888016addc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.814205] >ffff888016addd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.814810] ^ [ 42.815141] ffff888016addd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.815768] ffff888016adde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.816362] ================================================================== [ 42.817180] Disabling lock debugging due to kernel taint [ 44.322448] BUG: Bad rss-counter state mm:000000006c5763fd type:MM_FILEPAGES val:33 [ 44.323098] BUG: Bad rss-counter state mm:000000006c5763fd type:MM_ANONPAGES val:22 [ 44.709545] BUG: Bad rss-counter state mm:0000000023ff0756 type:MM_FILEPAGES val:33 [ 44.710582] BUG: Bad rss-counter state mm:0000000023ff0756 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35674' (ECDSA) to the list of known hosts. 2023/06/20 09:39:29 fuzzer started 2023/06/20 09:39:29 dialing manager at localhost:44161 2023/06/20 09:39:29 checking machine... 2023/06/20 09:39:29 checking revisions... [ 45.463766] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:39:30 testing simple program... [ 45.521085] cgroup: Unknown subsys name 'net' [ 45.573013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:39:16 Registers: info registers vcpu 0 RAX=0000000080000102 RBX=ffffffff86605973 RCX=ffffffff813a0a8d RDX=ffffffffffffffff RSI=ffffffff86605973 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =ffffffff86605973 R10=ffffffffffffffff R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e8d9ec0 RIP=ffffffff814c01d0 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 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=00007fcbed6a20e0 CR3=000000000d852000 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=2039323a39333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fc9bc00 RSI=ffffffff84e392e0 RDI=0000000000000003 RBP=ffffffff84e392e0 RSP=ffff88801a3bee50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff888016f8621c R12=0000000000000003 R13=0000000000000003 R14=dffffc0000000000 R15=ffff88801a3bef20 RIP=ffffffff814c03f6 RFL=00000206 [-----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 00007f2812594900 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=00007f2812539008 CR3=0000000014790000 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