syzkaller login: [ 48.539643] BUG: Bad rss-counter state mm:00000000f2539ef4 type:MM_FILEPAGES val:33 [ 48.540310] BUG: Bad rss-counter state mm:00000000f2539ef4 type:MM_ANONPAGES val:22 [ 48.676494] ================================================================== [ 48.677027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.677569] Read of size 8 at addr ffff88800da75a50 by task sshd/219 [ 48.678009] [ 48.678135] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.678631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.679188] Call Trace: [ 48.679984] [ 48.680201] dump_stack_lvl+0x91/0xf0 [ 48.680493] print_report+0xcc/0x620 [ 48.680774] ? __virt_addr_valid+0x102/0x340 [ 48.682928] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.683354] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.683723] kasan_report+0xbe/0xf0 [ 48.684011] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.684418] vma_interval_tree_remove+0xc75/0xec0 [ 48.685215] vma_prepare+0xc54/0x11a0 [ 48.685504] __split_vma+0x5af/0x950 [ 48.685787] ? __pfx___split_vma+0x10/0x10 [ 48.686146] ? find_held_lock+0x2c/0x110 [ 48.686451] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.686814] ? lock_is_held_type+0x9f/0x120 [ 48.687187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.687551] ? mtree_range_walk+0x632/0x900 [ 48.687877] ? mas_walk+0x5c7/0x7c0 [ 48.688203] do_vmi_munmap+0x1f1/0x2b0 [ 48.688492] mmap_region+0x1f9/0x2660 [ 48.688771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.689109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.689533] ? __pfx_lock_acquire+0x10/0x10 [ 48.689844] ? __pfx_mmap_region+0x10/0x10 [ 48.690209] ? security_mmap_addr+0x7d/0xa0 [ 48.690518] ? get_unmapped_area+0x1f5/0x3f0 [ 48.690840] do_mmap+0x854/0xf00 [ 48.691143] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.691841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.692228] ksys_mmap_pgoff+0x3af/0x500 [ 48.692523] do_syscall_64+0x3f/0x90 [ 48.692805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.693227] RIP: 0033:0x7f5a48faed82 [ 48.693494] 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 [ 48.694750] RSP: 002b:00007ffd8e596378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.695749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a48faed82 [ 48.696281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a483e8000 [ 48.696771] RBP: 00007f5a483e8000 R08: 0000000000000009 R09: 0000000000001000 [ 48.697310] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0ed258f60 [ 48.697790] R13: 00007ffd8e596390 R14: 00007ffd8e5963c0 R15: 00007ffd8e596720 [ 48.698329] [ 48.698507] [ 48.698628] Allocated by task 212: [ 48.698876] kasan_save_stack+0x22/0x50 [ 48.699218] kasan_set_track+0x25/0x30 [ 48.699523] __kasan_slab_alloc+0x59/0x70 [ 48.699827] kmem_cache_alloc+0x16b/0x370 [ 48.700169] vm_area_dup+0x20/0x160 [ 48.700429] __split_vma+0x170/0x950 [ 48.700703] split_vma+0xc6/0x110 [ 48.700963] mprotect_fixup+0x8d2/0xb30 [ 48.701303] do_mprotect_pkey+0x87e/0xd40 [ 48.701605] __x64_sys_mprotect+0x78/0xc0 [ 48.701913] do_syscall_64+0x3f/0x90 [ 48.702231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.702603] [ 48.702735] Freed by task 0: [ 48.702952] kasan_save_stack+0x22/0x50 [ 48.703305] kasan_set_track+0x25/0x30 [ 48.703970] kasan_save_free_info+0x2b/0x50 [ 48.704331] __kasan_slab_free+0x10a/0x190 [ 48.704641] kmem_cache_free+0x10d/0x4d0 [ 48.704937] rcu_core+0x8c8/0x2860 [ 48.705239] __do_softirq+0x1b7/0x7d4 [ 48.705524] [ 48.705653] Last potentially related work creation: [ 48.705991] kasan_save_stack+0x22/0x50 [ 48.706333] __kasan_record_aux_stack+0x8e/0xa0 [ 48.706677] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.707052] remove_vma+0x139/0x170 [ 48.707385] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.707715] do_vmi_munmap+0x1f1/0x2b0 [ 48.707995] __vm_munmap+0x138/0x3a0 [ 48.708315] __x64_sys_munmap+0x59/0x80 [ 48.708605] do_syscall_64+0x3f/0x90 [ 48.708884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.709304] [ 48.709426] The buggy address belongs to the object at ffff88800da759f8 [ 48.709426] which belongs to the cache vm_area_struct of size 168 [ 48.710314] The buggy address is located 88 bytes inside of [ 48.710314] freed 168-byte region [ffff88800da759f8, ffff88800da75aa0) [ 48.711179] [ 48.711341] The buggy address belongs to the physical page: [ 48.711719] page:00000000cb8d547c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda75 [ 48.712386] memcg:ffff88800da61b01 [ 48.712633] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 48.713042] page_type: 0xffffffff() [ 48.713355] raw: 0100000000000200 ffff88800879fc80 ffffea0000375980 dead000000000005 [ 48.713882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da61b01 [ 48.714453] page dumped because: kasan: bad access detected [ 48.714831] [ 48.714960] Memory state around the buggy address: [ 48.715370] ffff88800da75900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.715856] ffff88800da75980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 48.716390] >ffff88800da75a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.716880] ^ [ 48.717321] ffff88800da75a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 48.717816] ffff88800da75b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.718342] ================================================================== [ 48.735286] Disabling lock debugging due to kernel taint [ 50.653867] BUG: Bad rss-counter state mm:00000000c38318d7 type:MM_FILEPAGES val:33 [ 50.654467] BUG: Bad rss-counter state mm:00000000c38318d7 type:MM_ANONPAGES val:22 [ 52.374794] BUG: Bad rss-counter state mm:00000000efe8d922 type:MM_FILEPAGES val:33 [ 52.379961] BUG: Bad rss-counter state mm:00000000efe8d922 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19294' (ECDSA) to the list of known hosts. 2023/06/20 10:10:59 fuzzer started 2023/06/20 10:10:59 dialing manager at localhost:44161 2023/06/20 10:10:59 checking machine... 2023/06/20 10:10:59 checking revisions... [ 53.325481] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:10:59 testing simple program... [ 53.387208] cgroup: Unknown subsys name 'net' [ 53.481019] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:49 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=00007fab28935328 CR3=000000000f58c000 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=2038353a30313a3031203032206e754a XMM01=5d3136393937332e32352020205b203a XMM02=415f4d4d3a6570797420323239643865 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a30313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=000055ed5a24b4d0 CR3=000000000d5a0000 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=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