syzkaller login: [ 34.625536] BUG: Bad rss-counter state mm:00000000cd1b114d type:MM_FILEPAGES val:33 [ 34.626134] BUG: Bad rss-counter state mm:00000000cd1b114d type:MM_ANONPAGES val:22 [ 34.745503] ================================================================== [ 34.746040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.746581] Read of size 8 at addr ffff88800c577df0 by task sshd/221 [ 34.747010] [ 34.747133] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.747616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.748164] Call Trace: [ 34.748342] [ 34.748508] dump_stack_lvl+0x91/0xf0 [ 34.748782] print_report+0xcc/0x620 [ 34.749063] ? __virt_addr_valid+0x102/0x340 [ 34.749379] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.757709] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.758064] kasan_report+0xbe/0xf0 [ 34.758332] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.758685] vma_interval_tree_remove+0xc75/0xec0 [ 34.759032] vma_prepare+0xc54/0x11a0 [ 34.759302] __split_vma+0x5af/0x950 [ 34.759572] ? __pfx___split_vma+0x10/0x10 [ 34.759874] ? find_held_lock+0x2c/0x110 [ 34.760172] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.760491] ? lock_is_held_type+0x9f/0x120 [ 34.760797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.761147] ? mtree_range_walk+0x632/0x900 [ 34.765469] ? mas_walk+0x5c7/0x7c0 [ 34.765751] do_vmi_munmap+0x1f1/0x2b0 [ 34.766032] mmap_region+0x1f9/0x2660 [ 34.766305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.766599] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.766997] ? __pfx_lock_acquire+0x10/0x10 [ 34.767297] ? __pfx_mmap_region+0x10/0x10 [ 34.767600] ? security_mmap_addr+0x7d/0xa0 [ 34.767909] ? get_unmapped_area+0x1f5/0x3f0 [ 34.768210] do_mmap+0x854/0xf00 [ 34.768462] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.768745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.769062] ksys_mmap_pgoff+0x3af/0x500 [ 34.769349] do_syscall_64+0x3f/0x90 [ 34.769662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.770029] RIP: 0033:0x7f7d1ddb8d82 [ 34.770293] 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 [ 34.771482] RSP: 002b:00007ffed70e5818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.771989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d1ddb8d82 [ 34.772463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d1d1f2000 [ 34.772936] RBP: 00007f7d1d1f2000 R08: 0000000000000009 R09: 0000000000001000 [ 34.773407] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d6ecddd90 [ 34.773908] R13: 00007ffed70e5830 R14: 00007ffed70e5860 R15: 00007ffed70e5bc0 [ 34.774396] [ 34.774564] [ 34.774686] Allocated by task 214: [ 34.774930] kasan_save_stack+0x22/0x50 [ 34.775220] kasan_set_track+0x25/0x30 [ 34.775493] __kasan_slab_alloc+0x59/0x70 [ 34.775789] kmem_cache_alloc+0x16b/0x370 [ 34.776086] vm_area_dup+0x20/0x160 [ 34.776347] __split_vma+0x170/0x950 [ 34.776605] split_vma+0xc6/0x110 [ 34.776861] mprotect_fixup+0x8d2/0xb30 [ 34.777147] do_mprotect_pkey+0x87e/0xd40 [ 34.777447] __x64_sys_mprotect+0x78/0xc0 [ 34.777743] do_syscall_64+0x3f/0x90 [ 34.778015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.778376] [ 34.778495] Freed by task 214: [ 34.778716] kasan_save_stack+0x22/0x50 [ 34.779002] kasan_set_track+0x25/0x30 [ 34.779282] kasan_save_free_info+0x2b/0x50 [ 34.779586] __kasan_slab_free+0x10a/0x190 [ 34.779883] kmem_cache_free+0x10d/0x4d0 [ 34.780176] rcu_core+0x8c8/0x2860 [ 34.780432] __do_softirq+0x1b7/0x7d4 [ 34.780707] [ 34.780826] Last potentially related work creation: [ 34.781156] kasan_save_stack+0x22/0x50 [ 34.781458] __kasan_record_aux_stack+0x8e/0xa0 [ 34.781805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.782169] remove_vma+0x139/0x170 [ 34.782420] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.782733] do_vmi_munmap+0x1f1/0x2b0 [ 34.783009] __vm_munmap+0x138/0x3a0 [ 34.783267] __x64_sys_munmap+0x59/0x80 [ 34.783547] do_syscall_64+0x3f/0x90 [ 34.783816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.784170] [ 34.784296] Second to last potentially related work creation: [ 34.784678] kasan_save_stack+0x22/0x50 [ 34.784955] __kasan_record_aux_stack+0x8e/0xa0 [ 34.785279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.785669] remove_vma+0x139/0x170 [ 34.785929] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.786238] do_vmi_munmap+0x1f1/0x2b0 [ 34.786510] mmap_region+0x1f9/0x2660 [ 34.786782] do_mmap+0x854/0xf00 [ 34.787023] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.787296] ksys_mmap_pgoff+0x3af/0x500 [ 34.787581] do_syscall_64+0x3f/0x90 [ 34.787845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.788200] [ 34.788320] The buggy address belongs to the object at ffff88800c577d98 [ 34.788320] which belongs to the cache vm_area_struct of size 168 [ 34.789139] The buggy address is located 88 bytes inside of [ 34.789139] freed 168-byte region [ffff88800c577d98, ffff88800c577e40) [ 34.789958] [ 34.790087] The buggy address belongs to the physical page: [ 34.790456] page:00000000516a96ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc577 [ 34.791058] memcg:ffff88800caee801 [ 34.791298] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.791662] page_type: 0xffffffff() [ 34.791919] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.792431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caee801 [ 34.792944] page dumped because: kasan: bad access detected [ 34.793312] [ 34.793455] Memory state around the buggy address: [ 34.793801] ffff88800c577c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.794284] ffff88800c577d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.794762] >ffff88800c577d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.795249] ^ [ 34.795702] ffff88800c577e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.796186] ffff88800c577e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.796660] ================================================================== [ 34.797318] Disabling lock debugging due to kernel taint [ 39.521830] BUG: Bad rss-counter state mm:0000000070ac5e4f type:MM_FILEPAGES val:33 [ 39.522459] BUG: Bad rss-counter state mm:0000000070ac5e4f type:MM_ANONPAGES val:22 [ 41.394500] BUG: Bad rss-counter state mm:00000000e36d6355 type:MM_FILEPAGES val:33 [ 41.395092] BUG: Bad rss-counter state mm:00000000e36d6355 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53069' (ECDSA) to the list of known hosts. 2023/06/20 10:11:06 fuzzer started 2023/06/20 10:11:07 dialing manager at localhost:44161 2023/06/20 10:11:07 checking machine... 2023/06/20 10:11:07 checking revisions... [ 42.331938] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:11:07 testing simple program... [ 42.376751] cgroup: Unknown subsys name 'net' [ 42.435656] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:11:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801698a20c RCX=0000000000000000 RDX=ffff888018fd0000 RSI=ffffffff844b27a8 RDI=ffff88800d95fa48 RBP=ffff88800d95fa48 RSP=ffff88800d95f958 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffffffffffff R13=dffffc0000000000 R14=ffff88800d95fa60 R15=ffff88800d95fa50 RIP=ffffffff814c07e0 RFL=00000293 [--S-A-C] 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 00007f43a1443900 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=00007f43a14436f8 CR3=00000000168c2000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81eef8b8 RDX=ffff888009b09b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800c18b438 RSP=ffff88801583f9a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c18b438 R14=0000000000000081 R15=ffff88800c18b43a RIP=ffffffff814c07eb 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 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=00007f21c0102260 CR3=000000000df60000 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=756e696c2d34365f3638782f62696c2f XMM01=732e746964756162696c2f756e672d78 XMM02=00312e6f732e746964756162696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000