syzkaller login: [ 100.658595] BUG: Bad rss-counter state mm:000000008b61539c type:MM_FILEPAGES val:33 [ 100.659777] BUG: Bad rss-counter state mm:000000008b61539c type:MM_ANONPAGES val:22 [ 100.801019] ================================================================== [ 100.801912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 100.802832] Read of size 8 at addr ffff888018401a50 by task sshd/221 [ 100.803727] [ 100.803945] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 100.804941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 100.805911] Call Trace: [ 100.806228] [ 100.806513] dump_stack_lvl+0x91/0xf0 [ 100.807014] print_report+0xcc/0x620 [ 100.807494] ? __virt_addr_valid+0x102/0x340 [ 100.808037] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.808643] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.809244] kasan_report+0xbe/0xf0 [ 100.809709] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.810316] vma_interval_tree_remove+0xc75/0xec0 [ 100.810921] vma_prepare+0xc54/0x11a0 [ 100.811393] __split_vma+0x5af/0x950 [ 100.811862] ? __pfx___split_vma+0x10/0x10 [ 100.812381] ? find_held_lock+0x2c/0x110 [ 100.812892] do_vmi_align_munmap+0x2ba/0x11f0 [ 100.813449] ? lock_is_held_type+0x9f/0x120 [ 100.813983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 100.814584] ? mtree_range_walk+0x632/0x900 [ 100.815143] ? mas_walk+0x5c7/0x7c0 [ 100.815614] do_vmi_munmap+0x1f1/0x2b0 [ 100.816101] mmap_region+0x1f9/0x2660 [ 100.816582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 100.817091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 100.817800] ? __pfx_lock_acquire+0x10/0x10 [ 100.818325] ? __pfx_mmap_region+0x10/0x10 [ 100.818843] ? security_mmap_addr+0x7d/0xa0 [ 100.819381] ? get_unmapped_area+0x1f5/0x3f0 [ 100.819920] do_mmap+0x854/0xf00 [ 100.820355] vm_mmap_pgoff+0x1a6/0x3a0 [ 100.820844] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 100.821400] ksys_mmap_pgoff+0x3af/0x500 [ 100.821903] do_syscall_64+0x3f/0x90 [ 100.822376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.823025] RIP: 0033:0x7fcc843bad82 [ 100.823474] 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 [ 100.825560] RSP: 002b:00007ffdcf9ed508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 100.826448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc843bad82 [ 100.827291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc837f4000 [ 100.828117] RBP: 00007fcc837f4000 R08: 0000000000000009 R09: 0000000000001000 [ 100.828948] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad45f0cec0 [ 100.829781] R13: 00007ffdcf9ed520 R14: 00007ffdcf9ed550 R15: 00007ffdcf9ed8b0 [ 100.830620] [ 100.830926] [ 100.831139] Allocated by task 214: [ 100.831562] kasan_save_stack+0x22/0x50 [ 100.832063] kasan_set_track+0x25/0x30 [ 100.832549] __kasan_slab_alloc+0x59/0x70 [ 100.833067] kmem_cache_alloc+0x16b/0x370 [ 100.833576] vm_area_dup+0x20/0x160 [ 100.834027] __split_vma+0x170/0x950 [ 100.834490] split_vma+0xc6/0x110 [ 100.834928] mprotect_fixup+0x8d2/0xb30 [ 100.835419] do_mprotect_pkey+0x87e/0xd40 [ 100.835938] __x64_sys_mprotect+0x78/0xc0 [ 100.836454] do_syscall_64+0x3f/0x90 [ 100.836924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.837565] [ 100.837778] Freed by task 214: [ 100.838165] kasan_save_stack+0x22/0x50 [ 100.838664] kasan_set_track+0x25/0x30 [ 100.839164] kasan_save_free_info+0x2b/0x50 [ 100.839686] __kasan_slab_free+0x10a/0x190 [ 100.840207] kmem_cache_free+0x10d/0x4d0 [ 100.840710] rcu_core+0x8c8/0x2860 [ 100.841148] __do_softirq+0x1b7/0x7d4 [ 100.841616] [ 100.841828] Last potentially related work creation: [ 100.842407] kasan_save_stack+0x22/0x50 [ 100.842920] __kasan_record_aux_stack+0x8e/0xa0 [ 100.843486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 100.844113] remove_vma+0x139/0x170 [ 100.844620] do_vmi_align_munmap+0xd4a/0x11f0 [ 100.845182] do_vmi_munmap+0x1f1/0x2b0 [ 100.845659] __vm_munmap+0x138/0x3a0 [ 100.846126] __x64_sys_munmap+0x59/0x80 [ 100.846616] do_syscall_64+0x3f/0x90 [ 100.847098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.847727] [ 100.847945] The buggy address belongs to the object at ffff8880184019f8 [ 100.847945] which belongs to the cache vm_area_struct of size 168 [ 100.849394] The buggy address is located 88 bytes inside of [ 100.849394] freed 168-byte region [ffff8880184019f8, ffff888018401aa0) [ 100.850775] [ 100.851003] The buggy address belongs to the physical page: [ 100.851661] page:00000000f3d9ce1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18401 [ 100.852745] memcg:ffff88800fdb1b01 [ 100.853166] flags: 0x100000000000200(slab|node=0|zone=1) [ 100.853812] page_type: 0xffffffff() [ 100.854260] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 100.855177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb1b01 [ 100.856072] page dumped because: kasan: bad access detected [ 100.856721] [ 100.856933] Memory state around the buggy address: [ 100.857505] ffff888018401900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 100.858355] ffff888018401980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 100.859225] >ffff888018401a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 100.860061] ^ [ 100.860752] ffff888018401a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 100.861634] ffff888018401b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 100.862508] ================================================================== [ 100.863550] Disabling lock debugging due to kernel taint [ 103.001126] BUG: Bad rss-counter state mm:000000008010f70c type:MM_FILEPAGES val:33 [ 103.002079] BUG: Bad rss-counter state mm:000000008010f70c type:MM_ANONPAGES val:22 [ 103.522146] BUG: Bad rss-counter state mm:00000000c8d5d9fa type:MM_FILEPAGES val:33 [ 103.523422] BUG: Bad rss-counter state mm:00000000c8d5d9fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8016' (ECDSA) to the list of known hosts. 2023/06/19 17:41:40 fuzzer started 2023/06/19 17:41:41 dialing manager at localhost:44161 2023/06/19 17:41:41 checking machine... 2023/06/19 17:41:41 checking revisions... [ 104.279195] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:41:41 testing simple program... [ 104.333724] cgroup: Unknown subsys name 'net' [ 104.385601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:40:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe8a626dc8 CR3=0000000005482000 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=00007f7ef0118510000055fd74bb3790 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 info registers vcpu 1 RAX=ffffffff84506c7f RBX=0000000000000001 RCX=ffffffff863b1c01 RDX=ffff88800ee678c0 RSI=ffffffff84506c7f RDI=ffff88800ee67878 RBP=ffff88800ee678d0 RSP=ffff88800ee67808 R8 =ffffffff863b1c9a R9 =ffff88800ee678b8 R10=0000000000038001 R11=000000000008a977 R12=ffff88800ee67940 R13=ffff88800ee678c0 R14=ffff88800e7951c0 R15=ffff88800ee67878 RIP=ffffffff81130641 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 00007fe0010b3900 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=00007fe001668650 CR3=0000000016976000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000