syzkaller login: [ 39.326308] BUG: Bad rss-counter state mm:000000003faea2d7 type:MM_FILEPAGES val:33 [ 39.327320] BUG: Bad rss-counter state mm:000000003faea2d7 type:MM_ANONPAGES val:22 [ 39.517155] ================================================================== [ 39.518196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.519239] Read of size 8 at addr ffff88800f583228 by task sshd/219 [ 39.520227] [ 39.520499] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.521459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.522571] Call Trace: [ 39.522926] [ 39.523248] dump_stack_lvl+0x91/0xf0 [ 39.523794] print_report+0xcc/0x620 [ 39.524342] ? __virt_addr_valid+0x102/0x340 [ 39.524967] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.525659] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.526351] kasan_report+0xbe/0xf0 [ 39.526903] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.527619] vma_interval_tree_remove+0xc75/0xec0 [ 39.528316] vma_prepare+0xc54/0x11a0 [ 39.528878] __split_vma+0x5af/0x950 [ 39.529425] ? __pfx___split_vma+0x10/0x10 [ 39.530032] ? find_held_lock+0x2c/0x110 [ 39.530634] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.531298] ? lock_is_held_type+0x9f/0x120 [ 39.531925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.532657] ? mtree_range_walk+0x632/0x900 [ 39.533295] ? mas_walk+0x5c7/0x7c0 [ 39.533844] do_vmi_munmap+0x1f1/0x2b0 [ 39.534425] mmap_region+0x1f9/0x2660 [ 39.534981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.535579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.536403] ? __pfx_lock_acquire+0x10/0x10 [ 39.537010] ? __pfx_mmap_region+0x10/0x10 [ 39.537622] ? security_mmap_addr+0x7d/0xa0 [ 39.538231] ? get_unmapped_area+0x1f5/0x3f0 [ 39.538870] do_mmap+0x854/0xf00 [ 39.539369] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.539938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.540586] ksys_mmap_pgoff+0x3af/0x500 [ 39.541169] do_syscall_64+0x3f/0x90 [ 39.541721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.542456] RIP: 0033:0x7fc580b8cd82 [ 39.542980] 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 [ 39.545401] RSP: 002b:00007ffda3fc8e78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.546428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc580b8cd82 [ 39.547396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc57ffc6000 [ 39.548365] RBP: 00007fc57ffc6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.549328] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfdb4d8b20 [ 39.550304] R13: 00007ffda3fc8e90 R14: 00007ffda3fc8ec0 R15: 00007ffda3fc9220 [ 39.551288] [ 39.551625] [ 39.551877] Allocated by task 212: [ 39.552386] kasan_save_stack+0x22/0x50 [ 39.552960] kasan_set_track+0x25/0x30 [ 39.553525] __kasan_slab_alloc+0x59/0x70 [ 39.554124] kmem_cache_alloc+0x16b/0x370 [ 39.554711] vm_area_dup+0x20/0x160 [ 39.555229] __split_vma+0x170/0x950 [ 39.555762] split_vma+0xc6/0x110 [ 39.556271] mprotect_fixup+0x8d2/0xb30 [ 39.556850] do_mprotect_pkey+0x87e/0xd40 [ 39.557448] __x64_sys_mprotect+0x78/0xc0 [ 39.558036] do_syscall_64+0x3f/0x90 [ 39.558568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.559298] [ 39.559542] Freed by task 212: [ 39.559979] kasan_save_stack+0x22/0x50 [ 39.560567] kasan_set_track+0x25/0x30 [ 39.561167] kasan_save_free_info+0x2b/0x50 [ 39.561769] __kasan_slab_free+0x10a/0x190 [ 39.562371] kmem_cache_free+0x10d/0x4d0 [ 39.562944] rcu_core+0x8c8/0x2860 [ 39.563442] __do_softirq+0x1b7/0x7d4 [ 39.563977] [ 39.564219] Last potentially related work creation: [ 39.564886] kasan_save_stack+0x22/0x50 [ 39.565453] __kasan_record_aux_stack+0x8e/0xa0 [ 39.566100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.566815] remove_vma+0x139/0x170 [ 39.567323] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.567951] do_vmi_munmap+0x1f1/0x2b0 [ 39.568504] __vm_munmap+0x138/0x3a0 [ 39.569028] __x64_sys_munmap+0x59/0x80 [ 39.569587] do_syscall_64+0x3f/0x90 [ 39.570116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.570837] [ 39.571079] The buggy address belongs to the object at ffff88800f5831d0 [ 39.571079] which belongs to the cache vm_area_struct of size 168 [ 39.572736] The buggy address is located 88 bytes inside of [ 39.572736] freed 168-byte region [ffff88800f5831d0, ffff88800f583278) [ 39.574315] [ 39.574557] The buggy address belongs to the physical page: [ 39.575302] page:00000000058ecaa2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf583 [ 39.576532] memcg:ffff888015dbb501 [ 39.577018] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.577747] page_type: 0xffffffff() [ 39.578259] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.579280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dbb501 [ 39.580280] page dumped because: kasan: bad access detected [ 39.581011] [ 39.581249] Memory state around the buggy address: [ 39.581894] ffff88800f583100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.582836] ffff88800f583180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.583776] >ffff88800f583200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.584741] ^ [ 39.585355] ffff88800f583280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.586310] ffff88800f583300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.587256] ================================================================== [ 39.588323] Disabling lock debugging due to kernel taint [ 41.731507] BUG: Bad rss-counter state mm:00000000144dfc73 type:MM_FILEPAGES val:33 [ 41.732768] BUG: Bad rss-counter state mm:00000000144dfc73 type:MM_ANONPAGES val:22 [ 42.216046] BUG: Bad rss-counter state mm:00000000254e8f0f type:MM_FILEPAGES val:33 [ 42.216630] BUG: Bad rss-counter state mm:00000000254e8f0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40626' (ECDSA) to the list of known hosts. 2023/06/20 03:41:10 fuzzer started 2023/06/20 03:41:10 dialing manager at localhost:44161 2023/06/20 03:41:10 checking machine... 2023/06/20 03:41:10 checking revisions... [ 42.895837] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:41:11 testing simple program... [ 42.941772] cgroup: Unknown subsys name 'net' [ 43.004240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:02 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=00007f0d21013000 CR3=000000000c556000 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=2030313a31343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001983b1d RBX=ffff88800cc1d8b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cc1d8e8 RBP=ffff88800c0b3ba0 RSP=ffff88801ce97a48 R8 =0000000000000001 R9 =ffffed10039d2f3d R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c7453c0 R14=ffffffff8366dfdf R15=0000000000000001 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 00007f66b4350900 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=00007ffc0b3f6000 CR3=0000000016a66000 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=6720646572637465733a4d41503d706f 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