syzkaller login: [ 35.389541] BUG: Bad rss-counter state mm:00000000cb976da6 type:MM_FILEPAGES val:33 [ 35.390891] BUG: Bad rss-counter state mm:00000000cb976da6 type:MM_ANONPAGES val:22 [ 35.550959] ================================================================== [ 35.551884] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.552848] Read of size 8 at addr ffff88800eb2ea50 by task sshd/219 [ 35.553613] [ 35.553830] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.554812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.555817] Call Trace: [ 35.556155] [ 35.556456] dump_stack_lvl+0x91/0xf0 [ 35.556958] print_report+0xcc/0x620 [ 35.557440] ? __virt_addr_valid+0x102/0x340 [ 35.557995] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.558624] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.559248] kasan_report+0xbe/0xf0 [ 35.559725] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.560387] vma_interval_tree_remove+0xc75/0xec0 [ 35.560997] vma_prepare+0xc54/0x11a0 [ 35.561488] __split_vma+0x5af/0x950 [ 35.561964] ? __pfx___split_vma+0x10/0x10 [ 35.562489] ? find_held_lock+0x2c/0x110 [ 35.563014] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.563578] ? lock_is_held_type+0x9f/0x120 [ 35.564124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.564735] ? mtree_range_walk+0x632/0x900 [ 35.565290] ? mas_walk+0x5c7/0x7c0 [ 35.565772] do_vmi_munmap+0x1f1/0x2b0 [ 35.566271] mmap_region+0x1f9/0x2660 [ 35.566753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.567270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.567991] ? __pfx_lock_acquire+0x10/0x10 [ 35.568524] ? __pfx_mmap_region+0x10/0x10 [ 35.569056] ? security_mmap_addr+0x7d/0xa0 [ 35.569584] ? get_unmapped_area+0x1f5/0x3f0 [ 35.570130] do_mmap+0x854/0xf00 [ 35.570578] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.571075] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.571634] ksys_mmap_pgoff+0x3af/0x500 [ 35.572165] do_syscall_64+0x3f/0x90 [ 35.572649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.573306] RIP: 0033:0x7f5a55140d82 [ 35.573773] 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 [ 35.575922] RSP: 002b:00007ffefcbcb878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.576830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a55140d82 [ 35.577687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a5457a000 [ 35.578540] RBP: 00007f5a5457a000 R08: 0000000000000009 R09: 0000000000001000 [ 35.579382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560012064d90 [ 35.580256] R13: 00007ffefcbcb890 R14: 00007ffefcbcb8c0 R15: 00007ffefcbcbc20 [ 35.581117] [ 35.581410] [ 35.581628] Allocated by task 212: [ 35.582056] kasan_save_stack+0x22/0x50 [ 35.582560] kasan_set_track+0x25/0x30 [ 35.583060] __kasan_slab_alloc+0x59/0x70 [ 35.583580] kmem_cache_alloc+0x16b/0x370 [ 35.584107] vm_area_dup+0x20/0x160 [ 35.584561] __split_vma+0x170/0x950 [ 35.585027] split_vma+0xc6/0x110 [ 35.585467] mprotect_fixup+0x8d2/0xb30 [ 35.585968] do_mprotect_pkey+0x87e/0xd40 [ 35.586497] __x64_sys_mprotect+0x78/0xc0 [ 35.587013] do_syscall_64+0x3f/0x90 [ 35.587489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.588136] [ 35.588352] Freed by task 212: [ 35.588743] kasan_save_stack+0x22/0x50 [ 35.589252] kasan_set_track+0x25/0x30 [ 35.589752] kasan_save_free_info+0x2b/0x50 [ 35.590283] __kasan_slab_free+0x10a/0x190 [ 35.590817] kmem_cache_free+0x10d/0x4d0 [ 35.591331] rcu_core+0x8c8/0x2860 [ 35.591775] __do_softirq+0x1b7/0x7d4 [ 35.592274] [ 35.592490] Last potentially related work creation: [ 35.593086] kasan_save_stack+0x22/0x50 [ 35.593587] __kasan_record_aux_stack+0x8e/0xa0 [ 35.594155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.594799] remove_vma+0x139/0x170 [ 35.595260] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.595818] do_vmi_munmap+0x1f1/0x2b0 [ 35.596309] __vm_munmap+0x138/0x3a0 [ 35.596781] __x64_sys_munmap+0x59/0x80 [ 35.597289] do_syscall_64+0x3f/0x90 [ 35.597765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.598399] [ 35.598621] The buggy address belongs to the object at ffff88800eb2e9f8 [ 35.598621] which belongs to the cache vm_area_struct of size 168 [ 35.600101] The buggy address is located 88 bytes inside of [ 35.600101] freed 168-byte region [ffff88800eb2e9f8, ffff88800eb2eaa0) [ 35.601507] [ 35.601721] The buggy address belongs to the physical page: [ 35.602388] page:000000005978b398 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb2e [ 35.603465] memcg:ffff888016969e01 [ 35.603911] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.604560] page_type: 0xffffffff() [ 35.605008] raw: 0100000000000200 ffff88800879fc80 ffffea00003b6c00 dead000000000006 [ 35.605926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016969e01 [ 35.606835] page dumped because: kasan: bad access detected [ 35.607503] [ 35.607718] Memory state around the buggy address: [ 35.608303] ffff88800eb2e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.609163] ffff88800eb2e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.610017] >ffff88800eb2ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.610872] ^ [ 35.611569] ffff88800eb2ea80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.612434] ffff88800eb2eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.613303] ================================================================== [ 35.614276] Disabling lock debugging due to kernel taint [ 37.577160] BUG: Bad rss-counter state mm:00000000c4ab58e1 type:MM_FILEPAGES val:33 [ 37.578368] BUG: Bad rss-counter state mm:00000000c4ab58e1 type:MM_ANONPAGES val:22 [ 38.117649] BUG: Bad rss-counter state mm:00000000f57dd1de type:MM_FILEPAGES val:33 [ 38.118817] BUG: Bad rss-counter state mm:00000000f57dd1de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58501' (ECDSA) to the list of known hosts. 2023/06/19 14:19:03 fuzzer started 2023/06/19 14:19:03 dialing manager at localhost:44161 2023/06/19 14:19:03 checking machine... 2023/06/19 14:19:03 checking revisions... [ 38.752685] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:19:03 testing simple program... [ 38.800305] cgroup: Unknown subsys name 'net' [ 38.839931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:56 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=00007ffe8329a748 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=00007f1e72832510000055b49991d790 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f386fd90db0 CR3=00000000090be000 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=2032303a39313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000