syzkaller login: [ 44.299044] BUG: Bad rss-counter state mm:000000003a154780 type:MM_FILEPAGES val:33 [ 44.299986] BUG: Bad rss-counter state mm:000000003a154780 type:MM_ANONPAGES val:22 [ 44.413508] ================================================================== [ 44.414145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.414797] Read of size 8 at addr ffff88801a1315c8 by task sshd/221 [ 44.415316] [ 44.415463] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.416054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.416775] Call Trace: [ 44.416992] [ 44.417195] dump_stack_lvl+0x91/0xf0 [ 44.417532] print_report+0xcc/0x620 [ 44.418018] ? __virt_addr_valid+0x102/0x340 [ 44.418414] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.418830] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.419235] kasan_report+0xbe/0xf0 [ 44.419563] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.419981] vma_interval_tree_remove+0xc75/0xec0 [ 44.420419] vma_prepare+0xc54/0x11a0 [ 44.420791] __split_vma+0x5af/0x950 [ 44.421129] ? __pfx___split_vma+0x10/0x10 [ 44.421514] ? find_held_lock+0x2c/0x110 [ 44.421886] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.422283] ? lock_is_held_type+0x9f/0x120 [ 44.422709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.423125] ? mtree_range_walk+0x632/0x900 [ 44.423544] ? mas_walk+0x5c7/0x7c0 [ 44.423871] do_vmi_munmap+0x1f1/0x2b0 [ 44.424212] mmap_region+0x1f9/0x2660 [ 44.424567] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.424991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.425460] ? __pfx_lock_acquire+0x10/0x10 [ 44.425806] ? __pfx_mmap_region+0x10/0x10 [ 44.426149] ? security_mmap_addr+0x7d/0xa0 [ 44.426495] ? get_unmapped_area+0x1f5/0x3f0 [ 44.426856] do_mmap+0x854/0xf00 [ 44.427136] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.427473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.427867] ksys_mmap_pgoff+0x3af/0x500 [ 44.428215] do_syscall_64+0x3f/0x90 [ 44.428578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.429088] RIP: 0033:0x7fbe551a9d82 [ 44.429403] 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 [ 44.430819] RSP: 002b:00007ffe4439efd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.431440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe551a9d82 [ 44.431995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe545e3000 [ 44.432542] RBP: 00007fbe545e3000 R08: 0000000000000009 R09: 0000000000001000 [ 44.433155] R10: 0000000000000812 R11: 0000000000000206 R12: 000055814eee0f60 [ 44.433708] R13: 00007ffe4439eff0 R14: 00007ffe4439f020 R15: 00007ffe4439f380 [ 44.434261] [ 44.434454] [ 44.434605] Allocated by task 214: [ 44.434896] kasan_save_stack+0x22/0x50 [ 44.435244] kasan_set_track+0x25/0x30 [ 44.435581] __kasan_slab_alloc+0x59/0x70 [ 44.435936] kmem_cache_alloc+0x16b/0x370 [ 44.436282] vm_area_dup+0x20/0x160 [ 44.436586] __split_vma+0x170/0x950 [ 44.436931] split_vma+0xc6/0x110 [ 44.437219] mprotect_fixup+0x8d2/0xb30 [ 44.437540] do_mprotect_pkey+0x87e/0xd40 [ 44.437873] __x64_sys_mprotect+0x78/0xc0 [ 44.438228] do_syscall_64+0x3f/0x90 [ 44.438547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.438961] [ 44.439099] Freed by task 214: [ 44.439370] kasan_save_stack+0x22/0x50 [ 44.439729] kasan_set_track+0x25/0x30 [ 44.440052] kasan_save_free_info+0x2b/0x50 [ 44.440393] __kasan_slab_free+0x10a/0x190 [ 44.440782] kmem_cache_free+0x10d/0x4d0 [ 44.441120] rcu_core+0x8c8/0x2860 [ 44.441430] __do_softirq+0x1b7/0x7d4 [ 44.441751] [ 44.441902] Last potentially related work creation: [ 44.442327] kasan_save_stack+0x22/0x50 [ 44.442703] __kasan_record_aux_stack+0x8e/0xa0 [ 44.443094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.443555] remove_vma+0x139/0x170 [ 44.443884] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.444297] do_vmi_munmap+0x1f1/0x2b0 [ 44.444653] __vm_munmap+0x138/0x3a0 [ 44.445045] __x64_sys_munmap+0x59/0x80 [ 44.445382] do_syscall_64+0x3f/0x90 [ 44.445715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.446179] [ 44.446332] The buggy address belongs to the object at ffff88801a131570 [ 44.446332] which belongs to the cache vm_area_struct of size 168 [ 44.447420] The buggy address is located 88 bytes inside of [ 44.447420] freed 168-byte region [ffff88801a131570, ffff88801a131618) [ 44.448376] [ 44.448539] The buggy address belongs to the physical page: [ 44.449062] page:00000000e1bd83b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a131 [ 44.449815] memcg:ffff88800fb6bc01 [ 44.450121] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.450577] page_type: 0xffffffff() [ 44.450887] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.451522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb6bc01 [ 44.452156] page dumped because: kasan: bad access detected [ 44.452634] [ 44.452855] Memory state around the buggy address: [ 44.453269] ffff88801a131480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.453861] ffff88801a131500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 44.454431] >ffff88801a131580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.455074] ^ [ 44.455568] ffff88801a131600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.456173] ffff88801a131680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.456844] ================================================================== [ 44.457615] Disabling lock debugging due to kernel taint [ 46.490490] BUG: Bad rss-counter state mm:0000000021de961e type:MM_FILEPAGES val:33 [ 46.491237] BUG: Bad rss-counter state mm:0000000021de961e type:MM_ANONPAGES val:22 [ 46.798731] BUG: Bad rss-counter state mm:0000000018defe5e type:MM_FILEPAGES val:33 [ 46.799425] BUG: Bad rss-counter state mm:0000000018defe5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42572' (ECDSA) to the list of known hosts. 2023/06/20 08:34:26 fuzzer started 2023/06/20 08:34:26 dialing manager at localhost:44161 2023/06/20 08:34:26 checking machine... 2023/06/20 08:34:26 checking revisions... [ 47.412301] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:34:27 testing simple program... [ 47.450901] cgroup: Unknown subsys name 'net' [ 47.483750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:13 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=ffff888008c58000 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=00007fb2c2243c00 CR3=000000000d674000 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=f57fd4e032e355abae41e82dcdd0b310 XMM02=ec2efd57dc4c00df000000000011c458 XMM03=26d16b73f6e03b9e000000000011c528 XMM04=922b57c1f21d0b0d00000000000ae988 XMM05=e4cb8bb95a7664b600000000001335d8 XMM06=6660eb853b68e32c0000000000132440 XMM07=e042d86d42eb936e0000000000123cc0 XMM08=26d16b73f6e03b9e000000000011c528 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a3af1d RBX=ffff88800d1d78b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d1d78e8 RBP=ffff888019a08000 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019a01d60 R14=ffffffff813782a8 R15=ffff88800dc41580 RIP=ffffffff81846362 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 00007ffb42073900 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=00007ffb42052020 CR3=000000001bc76000 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