syzkaller login: [ 30.245860] BUG: Bad rss-counter state mm:000000000d65195c type:MM_FILEPAGES val:33 [ 30.246608] BUG: Bad rss-counter state mm:000000000d65195c type:MM_ANONPAGES val:22 [ 30.428325] ================================================================== [ 30.428918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.429521] Read of size 8 at addr ffff88801a0d7d08 by task sshd/220 [ 30.430075] [ 30.430217] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.430771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.431391] Call Trace: [ 30.431599] [ 30.431784] dump_stack_lvl+0x91/0xf0 [ 30.432105] print_report+0xcc/0x620 [ 30.432421] ? __virt_addr_valid+0x102/0x340 [ 30.432778] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.433175] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.433579] kasan_report+0xbe/0xf0 [ 30.437869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.438265] vma_interval_tree_remove+0xc75/0xec0 [ 30.438656] vma_prepare+0xc54/0x11a0 [ 30.438966] __split_vma+0x5af/0x950 [ 30.439271] ? __pfx___split_vma+0x10/0x10 [ 30.439623] ? find_held_lock+0x2c/0x110 [ 30.439964] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.440332] ? lock_is_held_type+0x9f/0x120 [ 30.440682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.441071] ? mtree_range_walk+0x632/0x900 [ 30.441438] ? mas_walk+0x5c7/0x7c0 [ 30.445794] do_vmi_munmap+0x1f1/0x2b0 [ 30.446119] mmap_region+0x1f9/0x2660 [ 30.446462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.446796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.447254] ? __pfx_lock_acquire+0x10/0x10 [ 30.447651] ? __pfx_mmap_region+0x10/0x10 [ 30.447996] ? security_mmap_addr+0x7d/0xa0 [ 30.448358] ? get_unmapped_area+0x1f5/0x3f0 [ 30.448721] do_mmap+0x854/0xf00 [ 30.449005] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.449327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.449767] ksys_mmap_pgoff+0x3af/0x500 [ 30.450098] do_syscall_64+0x3f/0x90 [ 30.450415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.450836] RIP: 0033:0x7fe5f509cd82 [ 30.451133] 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 [ 30.452487] RSP: 002b:00007ffeff0597b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.453063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5f509cd82 [ 30.453603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5f44d6000 [ 30.454232] RBP: 00007fe5f44d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.454772] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fa8eacb20 [ 30.455294] R13: 00007ffeff0597d0 R14: 00007ffeff059800 R15: 00007ffeff059b60 [ 30.455836] [ 30.456027] [ 30.456168] Allocated by task 213: [ 30.456453] kasan_save_stack+0x22/0x50 [ 30.456784] kasan_set_track+0x25/0x30 [ 30.457106] __kasan_slab_alloc+0x59/0x70 [ 30.457451] kmem_cache_alloc+0x16b/0x370 [ 30.457817] vm_area_dup+0x20/0x160 [ 30.458113] __split_vma+0x170/0x950 [ 30.458420] split_vma+0xc6/0x110 [ 30.458713] mprotect_fixup+0x8d2/0xb30 [ 30.459037] do_mprotect_pkey+0x87e/0xd40 [ 30.459375] __x64_sys_mprotect+0x78/0xc0 [ 30.459710] do_syscall_64+0x3f/0x90 [ 30.460016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.460432] [ 30.460576] Freed by task 213: [ 30.460829] kasan_save_stack+0x22/0x50 [ 30.461152] kasan_set_track+0x25/0x30 [ 30.461471] kasan_save_free_info+0x2b/0x50 [ 30.461829] __kasan_slab_free+0x10a/0x190 [ 30.462178] kmem_cache_free+0x10d/0x4d0 [ 30.462515] rcu_core+0x8c8/0x2860 [ 30.462806] __do_softirq+0x1b7/0x7d4 [ 30.463119] [ 30.463261] Last potentially related work creation: [ 30.463636] kasan_save_stack+0x22/0x50 [ 30.463963] __kasan_record_aux_stack+0x8e/0xa0 [ 30.464331] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.464759] remove_vma+0x139/0x170 [ 30.465052] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.465428] do_vmi_munmap+0x1f1/0x2b0 [ 30.465794] __vm_munmap+0x138/0x3a0 [ 30.466090] __x64_sys_munmap+0x59/0x80 [ 30.466417] do_syscall_64+0x3f/0x90 [ 30.466760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.467177] [ 30.467319] The buggy address belongs to the object at ffff88801a0d7cb0 [ 30.467319] which belongs to the cache vm_area_struct of size 168 [ 30.468246] The buggy address is located 88 bytes inside of [ 30.468246] freed 168-byte region [ffff88801a0d7cb0, ffff88801a0d7d58) [ 30.469184] [ 30.469327] The buggy address belongs to the physical page: [ 30.469778] page:000000003bd23fc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d7 [ 30.470493] memcg:ffff88801649fe01 [ 30.470793] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.471206] page_type: 0xffffffff() [ 30.471495] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.472074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801649fe01 [ 30.472659] page dumped because: kasan: bad access detected [ 30.473084] [ 30.473225] Memory state around the buggy address: [ 30.473600] ffff88801a0d7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.474165] ffff88801a0d7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.474719] >ffff88801a0d7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.475253] ^ [ 30.475567] ffff88801a0d7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.476110] ffff88801a0d7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.476698] ================================================================== [ 30.477528] Disabling lock debugging due to kernel taint [ 32.457821] BUG: Bad rss-counter state mm:0000000082286fb1 type:MM_FILEPAGES val:33 [ 32.458554] BUG: Bad rss-counter state mm:0000000082286fb1 type:MM_ANONPAGES val:22 [ 33.007696] BUG: Bad rss-counter state mm:00000000c65a7046 type:MM_FILEPAGES val:33 [ 33.008734] BUG: Bad rss-counter state mm:00000000c65a7046 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35773' (ECDSA) to the list of known hosts. 2023/06/21 10:22:04 fuzzer started 2023/06/21 10:22:04 dialing manager at localhost:36067 2023/06/21 10:22:04 checking machine... 2023/06/21 10:22:04 checking revisions... [ 33.840076] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:22:04 testing simple program... [ 33.914486] cgroup: Unknown subsys name 'net' [ 33.979379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:04 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f4d0000 RCX=0000000000000100 RDX=1ffff11001e9a208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09d70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800f4d1040 R15=000000000000000a RIP=ffffffff83018ab7 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=00007ffeb3203f00 CR3=000000000cb94000 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=e5f3bd92eb848bb22ba20c8e1ac17563 XMM02=4d4f62829e87650352f0904ecddad1b6 XMM03=cec389d0a43753bb155f70e9cd3e9b6c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 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=00007ffe0f32d4c8 CR3=0000000005482000 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=00007fe071349510000055b4d17d9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000