syzkaller login: [ 47.269053] BUG: Bad rss-counter state mm:00000000950dfc68 type:MM_FILEPAGES val:33 [ 47.270296] BUG: Bad rss-counter state mm:00000000950dfc68 type:MM_ANONPAGES val:22 [ 47.307069] ================================================================== [ 47.308080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.309031] Read of size 8 at addr ffff88800e6cd6b0 by task sshd/218 [ 47.309901] [ 47.310135] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.310995] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.311980] Call Trace: [ 47.312299] [ 47.312586] dump_stack_lvl+0x91/0xf0 [ 47.313076] print_report+0xcc/0x620 [ 47.313575] ? __virt_addr_valid+0x102/0x340 [ 47.314129] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.314757] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.315374] kasan_report+0xbe/0xf0 [ 47.315878] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.316521] vma_interval_tree_remove+0xc75/0xec0 [ 47.317135] vma_prepare+0xc54/0x11a0 [ 47.317618] __split_vma+0x5af/0x950 [ 47.318090] ? __pfx___split_vma+0x10/0x10 [ 47.318622] ? find_held_lock+0x2c/0x110 [ 47.319140] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.319702] ? lock_is_held_type+0x9f/0x120 [ 47.320255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.320871] ? mtree_range_walk+0x632/0x900 [ 47.321421] ? mas_walk+0x5c7/0x7c0 [ 47.321900] do_vmi_munmap+0x1f1/0x2b0 [ 47.322392] mmap_region+0x1f9/0x2660 [ 47.322875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.323392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.324147] ? __pfx_lock_acquire+0x10/0x10 [ 47.324688] ? __pfx_mmap_region+0x10/0x10 [ 47.325233] ? security_mmap_addr+0x7d/0xa0 [ 47.325771] ? get_unmapped_area+0x1f5/0x3f0 [ 47.326325] do_mmap+0x854/0xf00 [ 47.326779] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.327275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.327848] ksys_mmap_pgoff+0x3af/0x500 [ 47.328360] do_syscall_64+0x3f/0x90 [ 47.328841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.329494] RIP: 0033:0x7f17f2a31d82 [ 47.329954] 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 [ 47.332101] RSP: 002b:00007ffe7aebe118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.333003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17f2a31d82 [ 47.333860] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17f1e6b000 [ 47.334712] RBP: 00007f17f1e6b000 R08: 0000000000000009 R09: 0000000000001000 [ 47.335569] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b310dadb20 [ 47.336443] R13: 00007ffe7aebe130 R14: 00007ffe7aebe160 R15: 00007ffe7aebe4c0 [ 47.337308] [ 47.337602] [ 47.337821] Allocated by task 211: [ 47.338246] kasan_save_stack+0x22/0x50 [ 47.338770] kasan_set_track+0x25/0x30 [ 47.339271] __kasan_slab_alloc+0x59/0x70 [ 47.339818] kmem_cache_alloc+0x16b/0x370 [ 47.340365] vm_area_dup+0x20/0x160 [ 47.340827] __split_vma+0x170/0x950 [ 47.341300] split_vma+0xc6/0x110 [ 47.341745] mprotect_fixup+0x8d2/0xb30 [ 47.342252] do_mprotect_pkey+0x87e/0xd40 [ 47.342797] __x64_sys_mprotect+0x78/0xc0 [ 47.343324] do_syscall_64+0x3f/0x90 [ 47.343809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.344451] [ 47.344675] Freed by task 211: [ 47.345066] kasan_save_stack+0x22/0x50 [ 47.345571] kasan_set_track+0x25/0x30 [ 47.346074] kasan_save_free_info+0x2b/0x50 [ 47.346610] __kasan_slab_free+0x10a/0x190 [ 47.347148] kmem_cache_free+0x10d/0x4d0 [ 47.347655] rcu_core+0x8c8/0x2860 [ 47.348127] __do_softirq+0x1b7/0x7d4 [ 47.348603] [ 47.348816] Last potentially related work creation: [ 47.349403] kasan_save_stack+0x22/0x50 [ 47.349906] __kasan_record_aux_stack+0x8e/0xa0 [ 47.350488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.351139] remove_vma+0x139/0x170 [ 47.351595] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.352166] do_vmi_munmap+0x1f1/0x2b0 [ 47.352661] __vm_munmap+0x138/0x3a0 [ 47.353129] __x64_sys_munmap+0x59/0x80 [ 47.353647] do_syscall_64+0x3f/0x90 [ 47.354129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.354780] [ 47.355001] The buggy address belongs to the object at ffff88800e6cd658 [ 47.355001] which belongs to the cache vm_area_struct of size 168 [ 47.356484] The buggy address is located 88 bytes inside of [ 47.356484] freed 168-byte region [ffff88800e6cd658, ffff88800e6cd700) [ 47.357908] [ 47.358128] The buggy address belongs to the physical page: [ 47.358804] page:00000000cb32bfea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6cd [ 47.359913] memcg:ffff88800e780301 [ 47.360353] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.361061] page_type: 0xffffffff() [ 47.361510] raw: 0100000000000200 ffff88800879fc80 ffffea000037d800 dead000000000005 [ 47.362442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e780301 [ 47.363366] page dumped because: kasan: bad access detected [ 47.364032] [ 47.364245] Memory state around the buggy address: [ 47.364854] ffff88800e6cd580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.365748] ffff88800e6cd600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.366633] >ffff88800e6cd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.367533] ^ [ 47.368144] ffff88800e6cd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.369051] ffff88800e6cd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.369946] ================================================================== [ 47.371132] Disabling lock debugging due to kernel taint [ 50.025863] BUG: Bad rss-counter state mm:00000000b7e1be90 type:MM_FILEPAGES val:33 [ 50.027062] BUG: Bad rss-counter state mm:00000000b7e1be90 type:MM_ANONPAGES val:22 [ 50.507194] BUG: Bad rss-counter state mm:00000000695d2834 type:MM_FILEPAGES val:33 [ 50.508244] BUG: Bad rss-counter state mm:00000000695d2834 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24994' (ECDSA) to the list of known hosts. 2023/06/20 07:32:57 fuzzer started 2023/06/20 07:32:57 dialing manager at localhost:44161 2023/06/20 07:32:57 checking machine... 2023/06/20 07:32:57 checking revisions... [ 51.196111] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:32:57 testing simple program... [ 51.252382] cgroup: Unknown subsys name 'net' [ 51.317469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:48 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=00007fffd050f878 CR3=000000000f148000 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=2037353a32333a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a32333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ee40000 RCX=ffffffff812e00e5 RDX=1ffff11001a380a0 RSI=0000000000000000 RDI=ffff88800d1c0500 RBP=ffff88800d1c04c0 RSP=ffff88806cf09e08 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=0000000000000287 R13=ffffea00003b9000 R14=ffffffff813782a8 R15=ffff88800ee40000 RIP=ffffffff845135a1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdf508c3900 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=00007fdf4fd2dd60 CR3=000000000c9ae000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=408935790be56d6000000000000ae988 XMM05=2762c991edba71c60000000000135d88 XMM06=751b9502027dc0b900000000001341d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000