syzkaller login: [ 31.608166] BUG: Bad rss-counter state mm:000000002c9d8589 type:MM_FILEPAGES val:33 [ 31.609367] BUG: Bad rss-counter state mm:000000002c9d8589 type:MM_ANONPAGES val:22 [ 31.772063] ================================================================== [ 31.773138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.774287] Read of size 8 at addr ffff88800fccba50 by task sshd/221 [ 31.775289] [ 31.775551] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.776666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.777825] Call Trace: [ 31.778197] [ 31.778545] dump_stack_lvl+0x91/0xf0 [ 31.779122] print_report+0xcc/0x620 [ 31.779695] ? __virt_addr_valid+0x102/0x340 [ 31.780340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.781071] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.781789] kasan_report+0xbe/0xf0 [ 31.782370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.783139] vma_interval_tree_remove+0xc75/0xec0 [ 31.783869] vma_prepare+0xc54/0x11a0 [ 31.784459] __split_vma+0x5af/0x950 [ 31.785028] ? __pfx___split_vma+0x10/0x10 [ 31.785676] ? find_held_lock+0x2c/0x110 [ 31.786312] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.787002] ? lock_is_held_type+0x9f/0x120 [ 31.787528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.788136] ? mtree_range_walk+0x632/0x900 [ 31.788682] ? mas_walk+0x5c7/0x7c0 [ 31.789150] do_vmi_munmap+0x1f1/0x2b0 [ 31.789635] mmap_region+0x1f9/0x2660 [ 31.790116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.790625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.791325] ? __pfx_lock_acquire+0x10/0x10 [ 31.791846] ? __pfx_mmap_region+0x10/0x10 [ 31.792360] ? security_mmap_addr+0x7d/0xa0 [ 31.792883] ? get_unmapped_area+0x1f5/0x3f0 [ 31.793422] do_mmap+0x854/0xf00 [ 31.793852] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.794348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.794917] ksys_mmap_pgoff+0x3af/0x500 [ 31.795426] do_syscall_64+0x3f/0x90 [ 31.795894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.796528] RIP: 0033:0x7f389db7bd82 [ 31.796985] 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 [ 31.799102] RSP: 002b:00007ffda3fba308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.799999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f389db7bd82 [ 31.800847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f389cfb5000 [ 31.801688] RBP: 00007f389cfb5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.802532] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdc6670b20 [ 31.803360] R13: 00007ffda3fba320 R14: 00007ffda3fba350 R15: 00007ffda3fba6b0 [ 31.804202] [ 31.804489] [ 31.804701] Allocated by task 214: [ 31.805121] kasan_save_stack+0x22/0x50 [ 31.805617] kasan_set_track+0x25/0x30 [ 31.806101] __kasan_slab_alloc+0x59/0x70 [ 31.806670] kmem_cache_alloc+0x16b/0x370 [ 31.807184] vm_area_dup+0x20/0x160 [ 31.807631] __split_vma+0x170/0x950 [ 31.808090] split_vma+0xc6/0x110 [ 31.808522] mprotect_fixup+0x8d2/0xb30 [ 31.809023] do_mprotect_pkey+0x87e/0xd40 [ 31.809541] __x64_sys_mprotect+0x78/0xc0 [ 31.810064] do_syscall_64+0x3f/0x90 [ 31.810538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.811172] [ 31.811385] Freed by task 214: [ 31.811770] kasan_save_stack+0x22/0x50 [ 31.812264] kasan_set_track+0x25/0x30 [ 31.812749] kasan_save_free_info+0x2b/0x50 [ 31.813271] __kasan_slab_free+0x10a/0x190 [ 31.813796] kmem_cache_free+0x10d/0x4d0 [ 31.814298] rcu_core+0x8c8/0x2860 [ 31.814744] __do_softirq+0x1b7/0x7d4 [ 31.815211] [ 31.815423] Last potentially related work creation: [ 31.815995] kasan_save_stack+0x22/0x50 [ 31.816488] __kasan_record_aux_stack+0x8e/0xa0 [ 31.817051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.817684] remove_vma+0x139/0x170 [ 31.818128] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.818695] do_vmi_munmap+0x1f1/0x2b0 [ 31.819182] __vm_munmap+0x138/0x3a0 [ 31.819643] __x64_sys_munmap+0x59/0x80 [ 31.820135] do_syscall_64+0x3f/0x90 [ 31.820603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.821235] [ 31.821448] The buggy address belongs to the object at ffff88800fccb9f8 [ 31.821448] which belongs to the cache vm_area_struct of size 168 [ 31.822911] The buggy address is located 88 bytes inside of [ 31.822911] freed 168-byte region [ffff88800fccb9f8, ffff88800fccbaa0) [ 31.824286] [ 31.824499] The buggy address belongs to the physical page: [ 31.825151] page:00000000b55f2b04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfccb [ 31.826283] memcg:ffff88800e87ee01 [ 31.826718] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.827380] page_type: 0xffffffff() [ 31.827841] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.828752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87ee01 [ 31.829664] page dumped because: kasan: bad access detected [ 31.830323] [ 31.830562] Memory state around the buggy address: [ 31.831140] ffff88800fccb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.831994] ffff88800fccb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.832849] >ffff88800fccba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.833692] ^ [ 31.834386] ffff88800fccba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.835255] ffff88800fccbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.836090] ================================================================== [ 31.837351] Disabling lock debugging due to kernel taint [ 34.198071] BUG: Bad rss-counter state mm:0000000010da7f15 type:MM_FILEPAGES val:33 [ 34.199169] BUG: Bad rss-counter state mm:0000000010da7f15 type:MM_ANONPAGES val:22 [ 34.680212] BUG: Bad rss-counter state mm:00000000230043fa type:MM_FILEPAGES val:33 [ 34.681540] BUG: Bad rss-counter state mm:00000000230043fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56047' (ECDSA) to the list of known hosts. 2023/06/20 06:58:16 fuzzer started 2023/06/20 06:58:16 dialing manager at localhost:44161 2023/06/20 06:58:16 checking machine... 2023/06/20 06:58:16 checking revisions... [ 35.401634] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:58:16 testing simple program... [ 35.454343] cgroup: Unknown subsys name 'net' [ 35.490788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:58:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11000d03f66 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88800681fb20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88800ff9c4e0 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007fadd21f0900 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=00007fadd1710000 CR3=000000000d65e000 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=00000000000aead06b1e99b806172e3b XMM01=00000000000f9e5080f09f19808d26a3 XMM02=00000000000fa1902e86c1e8fc577532 XMM03=00000000000fbfe8ac585006bc0bee6f XMM04=b57d816368f0ddb700000000000ae988 XMM05=ead6d19c5c463b9b0000000000134e60 XMM06=00c3ffa147b8d8570000000000133c50 XMM07=fb795ef6d657705600000000001241c0 XMM08=2c67c8bc2e329bc3000000000011d418 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e657d90 RCX=ffffffff821584df RDX=ffff8880185d51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000f4 RSP=ffff88800e657cc8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffd51db1480 R13=0000000000000001 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e4 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 00007f428614c900 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=00007ffd51db2000 CR3=0000000017140000 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