syzkaller login: [ 66.047982] BUG: Bad rss-counter state mm:00000000396fe2cc type:MM_FILEPAGES val:33 [ 66.049411] BUG: Bad rss-counter state mm:00000000396fe2cc type:MM_ANONPAGES val:22 [ 66.210301] ================================================================== [ 66.211214] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.212159] Read of size 8 at addr ffff88800d9d5ed8 by task sshd/220 [ 66.212934] [ 66.213151] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 66.214284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.215268] Call Trace: [ 66.215599] [ 66.215884] dump_stack_lvl+0x91/0xf0 [ 66.216388] print_report+0xcc/0x620 [ 66.216872] ? __virt_addr_valid+0x102/0x340 [ 66.217415] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.218060] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.218674] kasan_report+0xbe/0xf0 [ 66.219158] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.219777] vma_interval_tree_remove+0xc75/0xec0 [ 66.220403] vma_prepare+0xc54/0x11a0 [ 66.220884] __split_vma+0x5af/0x950 [ 66.221360] ? __pfx___split_vma+0x10/0x10 [ 66.221892] ? find_held_lock+0x2c/0x110 [ 66.222418] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.222983] ? lock_is_held_type+0x9f/0x120 [ 66.223519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.224127] ? mtree_range_walk+0x632/0x900 [ 66.224685] ? mas_walk+0x5c7/0x7c0 [ 66.225168] do_vmi_munmap+0x1f1/0x2b0 [ 66.225669] mmap_region+0x1f9/0x2660 [ 66.226190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.226710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.227419] ? __pfx_lock_acquire+0x10/0x10 [ 66.227947] ? __pfx_mmap_region+0x10/0x10 [ 66.228484] ? security_mmap_addr+0x7d/0xa0 [ 66.229023] ? get_unmapped_area+0x1f5/0x3f0 [ 66.229573] do_mmap+0x854/0xf00 [ 66.230026] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.230530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.231110] ksys_mmap_pgoff+0x3af/0x500 [ 66.231618] do_syscall_64+0x3f/0x90 [ 66.232099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.232754] RIP: 0033:0x7f203fb8ed82 [ 66.233213] 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 [ 66.235363] RSP: 002b:00007ffffc6d9908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.236273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f203fb8ed82 [ 66.237122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f203efc8000 [ 66.238003] RBP: 00007f203efc8000 R08: 0000000000000009 R09: 0000000000001000 [ 66.238852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d797622ec0 [ 66.239700] R13: 00007ffffc6d9920 R14: 00007ffffc6d9950 R15: 00007ffffc6d9cb0 [ 66.240548] [ 66.240851] [ 66.241068] Allocated by task 213: [ 66.241501] kasan_save_stack+0x22/0x50 [ 66.242019] kasan_set_track+0x25/0x30 [ 66.242517] __kasan_slab_alloc+0x59/0x70 [ 66.243041] kmem_cache_alloc+0x16b/0x370 [ 66.243563] vm_area_dup+0x20/0x160 [ 66.244023] __split_vma+0x170/0x950 [ 66.244489] split_vma+0xc6/0x110 [ 66.244935] mprotect_fixup+0x8d2/0xb30 [ 66.245467] do_mprotect_pkey+0x87e/0xd40 [ 66.246004] __x64_sys_mprotect+0x78/0xc0 [ 66.246536] do_syscall_64+0x3f/0x90 [ 66.247013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.247653] [ 66.247869] Freed by task 213: [ 66.248263] kasan_save_stack+0x22/0x50 [ 66.248760] kasan_set_track+0x25/0x30 [ 66.249271] kasan_save_free_info+0x2b/0x50 [ 66.249798] __kasan_slab_free+0x10a/0x190 [ 66.250343] kmem_cache_free+0x10d/0x4d0 [ 66.250860] rcu_core+0x8c8/0x2860 [ 66.251307] __do_softirq+0x1b7/0x7d4 [ 66.251793] [ 66.252009] Last potentially related work creation: [ 66.252597] kasan_save_stack+0x22/0x50 [ 66.253096] __kasan_record_aux_stack+0x8e/0xa0 [ 66.253676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.254343] remove_vma+0x139/0x170 [ 66.254792] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.255355] do_vmi_munmap+0x1f1/0x2b0 [ 66.255842] __vm_munmap+0x138/0x3a0 [ 66.256312] __x64_sys_munmap+0x59/0x80 [ 66.256822] do_syscall_64+0x3f/0x90 [ 66.257293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.257954] [ 66.258170] The buggy address belongs to the object at ffff88800d9d5e80 [ 66.258170] which belongs to the cache vm_area_struct of size 168 [ 66.259661] The buggy address is located 88 bytes inside of [ 66.259661] freed 168-byte region [ffff88800d9d5e80, ffff88800d9d5f28) [ 66.261091] [ 66.261309] The buggy address belongs to the physical page: [ 66.261976] page:00000000d154ce97 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9d5 [ 66.263058] memcg:ffff88800eaa6f01 [ 66.263484] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.264134] page_type: 0xffffffff() [ 66.264586] raw: 0100000000000200 ffff88800879fc80 ffffea00003b93c0 dead000000000002 [ 66.265500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaa6f01 [ 66.266425] page dumped because: kasan: bad access detected [ 66.267079] [ 66.267292] Memory state around the buggy address: [ 66.267873] ffff88800d9d5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.268725] ffff88800d9d5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 66.269579] >ffff88800d9d5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.270438] ^ [ 66.271167] ffff88800d9d5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 66.272027] ffff88800d9d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 66.272890] ================================================================== [ 66.273877] Disabling lock debugging due to kernel taint [ 68.867993] BUG: Bad rss-counter state mm:000000000cf41e2e type:MM_FILEPAGES val:33 [ 68.868753] BUG: Bad rss-counter state mm:000000000cf41e2e type:MM_ANONPAGES val:22 [ 69.308179] BUG: Bad rss-counter state mm:00000000adef42aa type:MM_FILEPAGES val:33 [ 69.308958] BUG: Bad rss-counter state mm:00000000adef42aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22427' (ECDSA) to the list of known hosts. 2023/06/19 23:51:51 fuzzer started 2023/06/19 23:51:51 dialing manager at localhost:44161 2023/06/19 23:51:51 checking machine... 2023/06/19 23:51:51 checking revisions... [ 70.052272] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:51:51 testing simple program... [ 70.101487] cgroup: Unknown subsys name 'net' [ 70.145465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:15 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=00007f2fd18a9ae0 CR3=00000000166de000 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=2030353a31353a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a31353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8386e4fb RDX=ffff8880166f8000 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000e5 RSP=ffff888018df7b20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000fffff000 R13=ffff888008c78ea0 R14=ffff888018df7b70 R15=0000000000000000 RIP=ffffffff814c01fc RFL=00000246 [---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 00007fb8c1574900 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=00007ffebf193000 CR3=000000000b37e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000