syzkaller login: [ 31.415762] BUG: Bad rss-counter state mm:00000000d855b7a7 type:MM_FILEPAGES val:33 [ 31.416531] BUG: Bad rss-counter state mm:00000000d855b7a7 type:MM_ANONPAGES val:22 [ 31.614909] ================================================================== [ 31.615959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.616758] Read of size 8 at addr ffff888016611ed8 by task sshd/223 [ 31.617278] [ 31.617429] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.619089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.621066] Call Trace: [ 31.621687] [ 31.622226] dump_stack_lvl+0x91/0xf0 [ 31.623674] print_report+0xcc/0x620 [ 31.624591] ? __virt_addr_valid+0x102/0x340 [ 31.626697] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.629114] kasan_report+0xbe/0xf0 [ 31.630019] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.631292] vma_interval_tree_remove+0xc75/0xec0 [ 31.632511] vma_prepare+0xc54/0x11a0 [ 31.633480] __split_vma+0x5af/0x950 [ 31.634394] ? __pfx___split_vma+0x10/0x10 [ 31.635447] ? find_held_lock+0x2c/0x110 [ 31.636460] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.637705] ? lock_is_held_type+0x9f/0x120 [ 31.638075] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.638475] ? mtree_range_walk+0x632/0x900 [ 31.638964] ? mas_walk+0x5c7/0x7c0 [ 31.639292] do_vmi_munmap+0x1f1/0x2b0 [ 31.639638] mmap_region+0x1f9/0x2660 [ 31.639969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.640319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.640832] ? __pfx_lock_acquire+0x10/0x10 [ 31.641197] ? __pfx_mmap_region+0x10/0x10 [ 31.641589] ? security_mmap_addr+0x7d/0xa0 [ 31.641945] ? get_unmapped_area+0x1f5/0x3f0 [ 31.642321] do_mmap+0x854/0xf00 [ 31.642625] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.642964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.643354] ksys_mmap_pgoff+0x3af/0x500 [ 31.643716] do_syscall_64+0x3f/0x90 [ 31.644046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.644490] RIP: 0033:0x7fdf21e7dd82 [ 31.644834] 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 [ 31.646303] RSP: 002b:00007ffcce5cfb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.646958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf21e7dd82 [ 31.647597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf212b7000 [ 31.648239] RBP: 00007fdf212b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.648951] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560735d84b20 [ 31.649560] R13: 00007ffcce5cfb90 R14: 00007ffcce5cfbc0 R15: 00007ffcce5cff20 [ 31.651462] [ 31.652031] [ 31.652472] Allocated by task 214: [ 31.653380] kasan_save_stack+0x22/0x50 [ 31.654326] kasan_set_track+0x25/0x30 [ 31.655229] __kasan_slab_alloc+0x59/0x70 [ 31.656177] kmem_cache_alloc+0x16b/0x370 [ 31.657221] vm_area_dup+0x20/0x160 [ 31.658174] __split_vma+0x170/0x950 [ 31.659170] split_vma+0xc6/0x110 [ 31.660140] mprotect_fixup+0x8d2/0xb30 [ 31.661208] do_mprotect_pkey+0x87e/0xd40 [ 31.662316] __x64_sys_mprotect+0x78/0xc0 [ 31.663425] do_syscall_64+0x3f/0x90 [ 31.665119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.666453] [ 31.666894] Freed by task 204: [ 31.667475] kasan_save_stack+0x22/0x50 [ 31.667865] kasan_set_track+0x25/0x30 [ 31.668247] kasan_save_free_info+0x2b/0x50 [ 31.668650] __kasan_slab_free+0x10a/0x190 [ 31.669140] kmem_cache_free+0x10d/0x4d0 [ 31.669505] rcu_core+0x8c8/0x2860 [ 31.669812] __do_softirq+0x1b7/0x7d4 [ 31.670143] [ 31.670297] Last potentially related work creation: [ 31.670698] kasan_save_stack+0x22/0x50 [ 31.671060] __kasan_record_aux_stack+0x8e/0xa0 [ 31.671488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.671974] remove_vma+0x139/0x170 [ 31.672317] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.672734] do_vmi_munmap+0x1f1/0x2b0 [ 31.673114] __vm_munmap+0x138/0x3a0 [ 31.673451] __x64_sys_munmap+0x59/0x80 [ 31.673806] do_syscall_64+0x3f/0x90 [ 31.674151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.674618] [ 31.674770] The buggy address belongs to the object at ffff888016611e80 [ 31.674770] which belongs to the cache vm_area_struct of size 168 [ 31.675769] The buggy address is located 88 bytes inside of [ 31.675769] freed 168-byte region [ffff888016611e80, ffff888016611f28) [ 31.676732] [ 31.676924] The buggy address belongs to the physical page: [ 31.677376] page:000000009a84de31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16611 [ 31.678184] memcg:ffff88800cb4ee01 [ 31.678497] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.679001] page_type: 0xffffffff() [ 31.679323] raw: 0100000000000200 ffff8880087a0c80 ffffea00005aedc0 000000000000000b [ 31.679968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb4ee01 [ 31.680649] page dumped because: kasan: bad access detected [ 31.681139] [ 31.681295] Memory state around the buggy address: [ 31.681738] ffff888016611d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.682330] ffff888016611e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.682968] >ffff888016611e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.683563] ^ [ 31.684099] ffff888016611f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.684710] ffff888016611f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.685331] ================================================================== [ 31.686062] Disabling lock debugging due to kernel taint [ 33.673761] BUG: Bad rss-counter state mm:00000000873a9436 type:MM_FILEPAGES val:33 [ 33.674494] BUG: Bad rss-counter state mm:00000000873a9436 type:MM_ANONPAGES val:22 [ 34.464692] BUG: Bad rss-counter state mm:0000000088a40630 type:MM_FILEPAGES val:33 [ 34.465744] BUG: Bad rss-counter state mm:0000000088a40630 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3078' (ECDSA) to the list of known hosts. 2023/06/21 08:02:47 fuzzer started 2023/06/21 08:02:47 dialing manager at localhost:36067 2023/06/21 08:02:47 checking machine... 2023/06/21 08:02:47 checking revisions... [ 35.352920] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:02:47 testing simple program... [ 35.400075] cgroup: Unknown subsys name 'net' [ 35.484802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:47 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff888019877a68 RCX=ffffffff8170be24 RDX=ffff88800dc89b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019877940 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000000 R12=ffff8880181bce90 R13=00000000fffffffe R14=fffffbfff0ba7c92 R15=dffffc0000000000 RIP=ffffffff814c086b 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=00007f22437f5328 CR3=0000000014196000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff844b7ca0 RDX=ffff888016a39b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff8880199b7d68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800951a01e R13=ffff8880199b7e70 R14=ffffffffffffffff R15=1ffff11003336faf RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3beb9fe900 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=00007f3bebfb15a0 CR3=0000000016b3a000 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