syzkaller login: [ 33.258401] BUG: Bad rss-counter state mm:0000000005e86cbb type:MM_FILEPAGES val:33 [ 33.259425] BUG: Bad rss-counter state mm:0000000005e86cbb type:MM_ANONPAGES val:22 [ 33.429141] ================================================================== [ 33.430253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.431378] Read of size 8 at addr ffff88800cad5c20 by task sshd/227 [ 33.432416] [ 33.432685] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.433775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.434897] Call Trace: [ 33.435222] [ 33.435509] dump_stack_lvl+0x91/0xf0 [ 33.436028] print_report+0xcc/0x620 [ 33.436515] ? __virt_addr_valid+0x102/0x340 [ 33.437079] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.437751] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.438379] kasan_report+0xbe/0xf0 [ 33.438876] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.439517] vma_interval_tree_remove+0xc75/0xec0 [ 33.440135] vma_prepare+0xc54/0x11a0 [ 33.440628] __split_vma+0x5af/0x950 [ 33.441116] ? __pfx___split_vma+0x10/0x10 [ 33.441684] ? find_held_lock+0x2c/0x110 [ 33.442224] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.442797] ? lock_is_held_type+0x9f/0x120 [ 33.443346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.443966] ? mtree_range_walk+0x632/0x900 [ 33.444527] ? mas_walk+0x5c7/0x7c0 [ 33.445010] do_vmi_munmap+0x1f1/0x2b0 [ 33.445520] mmap_region+0x1f9/0x2660 [ 33.446016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.446545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.447290] ? __pfx_lock_acquire+0x10/0x10 [ 33.447838] ? __pfx_mmap_region+0x10/0x10 [ 33.448372] ? security_mmap_addr+0x7d/0xa0 [ 33.448914] ? get_unmapped_area+0x1f5/0x3f0 [ 33.449474] do_mmap+0x854/0xf00 [ 33.449948] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.450450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.451034] ksys_mmap_pgoff+0x3af/0x500 [ 33.451553] do_syscall_64+0x3f/0x90 [ 33.452044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.452703] RIP: 0033:0x7f0b7f354d82 [ 33.453172] 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 [ 33.455355] RSP: 002b:00007fff42642158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.456272] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b7f354d82 [ 33.457146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b7e78e000 [ 33.458026] RBP: 00007f0b7e78e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.458887] R10: 0000000000000812 R11: 0000000000000206 R12: 000055697b051f70 [ 33.459745] R13: 00007fff42642170 R14: 00007fff426421a0 R15: 00007fff42642500 [ 33.460616] [ 33.460920] [ 33.461141] Allocated by task 220: [ 33.461589] kasan_save_stack+0x22/0x50 [ 33.462115] kasan_set_track+0x25/0x30 [ 33.462620] __kasan_slab_alloc+0x59/0x70 [ 33.463166] kmem_cache_alloc+0x16b/0x370 [ 33.463699] vm_area_dup+0x20/0x160 [ 33.464172] __split_vma+0x170/0x950 [ 33.464656] split_vma+0xc6/0x110 [ 33.465100] mprotect_fixup+0x8d2/0xb30 [ 33.465621] do_mprotect_pkey+0x87e/0xd40 [ 33.466158] __x64_sys_mprotect+0x78/0xc0 [ 33.466702] do_syscall_64+0x3f/0x90 [ 33.467187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.467835] [ 33.468064] Freed by task 220: [ 33.468457] kasan_save_stack+0x22/0x50 [ 33.468972] kasan_set_track+0x25/0x30 [ 33.469481] kasan_save_free_info+0x2b/0x50 [ 33.470053] __kasan_slab_free+0x10a/0x190 [ 33.470588] kmem_cache_free+0x10d/0x4d0 [ 33.471108] rcu_core+0x8c8/0x2860 [ 33.471573] __do_softirq+0x1b7/0x7d4 [ 33.472067] [ 33.472281] Last potentially related work creation: [ 33.472893] kasan_save_stack+0x22/0x50 [ 33.473410] __kasan_record_aux_stack+0x8e/0xa0 [ 33.474018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.474672] remove_vma+0x139/0x170 [ 33.475139] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.475727] do_vmi_munmap+0x1f1/0x2b0 [ 33.476235] __vm_munmap+0x138/0x3a0 [ 33.476725] __x64_sys_munmap+0x59/0x80 [ 33.477237] do_syscall_64+0x3f/0x90 [ 33.477738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.478377] [ 33.478601] The buggy address belongs to the object at ffff88800cad5bc8 [ 33.478601] which belongs to the cache vm_area_struct of size 168 [ 33.480102] The buggy address is located 88 bytes inside of [ 33.480102] freed 168-byte region [ffff88800cad5bc8, ffff88800cad5c70) [ 33.481581] [ 33.481831] The buggy address belongs to the physical page: [ 33.482528] page:00000000e39f87f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcad5 [ 33.483684] memcg:ffff888019307e01 [ 33.484134] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.484813] page_type: 0xffffffff() [ 33.485288] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.486285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019307e01 [ 33.487255] page dumped because: kasan: bad access detected [ 33.487959] [ 33.488186] Memory state around the buggy address: [ 33.488811] ffff88800cad5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.489737] ffff88800cad5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.490650] >ffff88800cad5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.491553] ^ [ 33.492123] ffff88800cad5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.493017] ffff88800cad5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.493934] ================================================================== [ 33.494952] Disabling lock debugging due to kernel taint [ 35.345343] BUG: Bad rss-counter state mm:000000008e803cf6 type:MM_FILEPAGES val:33 [ 35.346142] BUG: Bad rss-counter state mm:000000008e803cf6 type:MM_ANONPAGES val:22 [ 35.785748] BUG: Bad rss-counter state mm:00000000f7f6d9fb type:MM_FILEPAGES val:33 [ 35.786530] BUG: Bad rss-counter state mm:00000000f7f6d9fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34867' (ECDSA) to the list of known hosts. 2023/06/19 14:00:39 fuzzer started 2023/06/19 14:00:39 dialing manager at localhost:44161 2023/06/19 14:00:39 checking machine... 2023/06/19 14:00:39 checking revisions... [ 36.461379] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:00:39 testing simple program... [ 36.512029] cgroup: Unknown subsys name 'net' [ 36.563230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:00:37 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=00007ffd8a42bbb8 CR3=0000000019272000 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=2038333a30303a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a30303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff88800ff6b680 RSI=ffffffff817185e4 RDI=ffff88800e43b7e0 RBP=ffff88800fc68000 RSP=ffff888016457e78 R8 =0000000000000000 R9 =ffffed1001c876fc R10=ffff88800e43b7e3 R11=0000000000000000 R12=0000000000000000 R13=00007f7754cce650 R14=ffff88800fc68010 R15=0000000000000040 RIP=ffffffff8171ac82 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7754719900 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=00007f7754cce650 CR3=00000000195d8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000