syzkaller login: [ 31.208447] BUG: Bad rss-counter state mm:000000005a0245f4 type:MM_FILEPAGES val:33 [ 31.209927] BUG: Bad rss-counter state mm:000000005a0245f4 type:MM_ANONPAGES val:22 [ 31.375602] ================================================================== [ 31.376670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.377934] Read of size 8 at addr ffff88800d9976b0 by task sshd/221 [ 31.378807] [ 31.379059] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.380052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.381167] Call Trace: [ 31.381557] [ 31.381884] dump_stack_lvl+0x91/0xf0 [ 31.382442] print_report+0xcc/0x620 [ 31.383005] ? __virt_addr_valid+0x102/0x340 [ 31.383653] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.384365] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385077] kasan_report+0xbe/0xf0 [ 31.385630] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.386355] vma_interval_tree_remove+0xc75/0xec0 [ 31.387050] vma_prepare+0xc54/0x11a0 [ 31.387601] __split_vma+0x5af/0x950 [ 31.388147] ? __pfx___split_vma+0x10/0x10 [ 31.388759] ? find_held_lock+0x2c/0x110 [ 31.389369] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.390019] ? lock_is_held_type+0x9f/0x120 [ 31.390635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.391333] ? mtree_range_walk+0x632/0x900 [ 31.391981] ? mas_walk+0x5c7/0x7c0 [ 31.392525] do_vmi_munmap+0x1f1/0x2b0 [ 31.393091] mmap_region+0x1f9/0x2660 [ 31.393673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.394278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.395125] ? __pfx_lock_acquire+0x10/0x10 [ 31.395757] ? __pfx_mmap_region+0x10/0x10 [ 31.396381] ? security_mmap_addr+0x7d/0xa0 [ 31.397012] ? get_unmapped_area+0x1f5/0x3f0 [ 31.397671] do_mmap+0x854/0xf00 [ 31.398197] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.398782] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.399438] ksys_mmap_pgoff+0x3af/0x500 [ 31.400033] do_syscall_64+0x3f/0x90 [ 31.400606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401388] RIP: 0033:0x7fc5f483fd82 [ 31.401928] 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 [ 31.404451] RSP: 002b:00007ffd0c204528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.405534] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5f483fd82 [ 31.406545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5f3c79000 [ 31.407547] RBP: 00007fc5f3c79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.408549] R10: 0000000000000812 R11: 0000000000000206 R12: 000056513cb11d90 [ 31.409572] R13: 00007ffd0c204540 R14: 00007ffd0c204570 R15: 00007ffd0c2048d0 [ 31.410583] [ 31.410926] [ 31.411184] Allocated by task 214: [ 31.411686] kasan_save_stack+0x22/0x50 [ 31.412274] kasan_set_track+0x25/0x30 [ 31.412848] __kasan_slab_alloc+0x59/0x70 [ 31.413477] kmem_cache_alloc+0x16b/0x370 [ 31.414082] vm_area_dup+0x20/0x160 [ 31.414609] __split_vma+0x170/0x950 [ 31.415154] split_vma+0xc6/0x110 [ 31.415697] mprotect_fixup+0x8d2/0xb30 [ 31.416267] do_mprotect_pkey+0x87e/0xd40 [ 31.416854] __x64_sys_mprotect+0x78/0xc0 [ 31.417453] do_syscall_64+0x3f/0x90 [ 31.417992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418731] [ 31.419068] Freed by task 214: [ 31.419525] kasan_save_stack+0x22/0x50 [ 31.420098] kasan_set_track+0x25/0x30 [ 31.420664] kasan_save_free_info+0x2b/0x50 [ 31.421293] __kasan_slab_free+0x10a/0x190 [ 31.421908] kmem_cache_free+0x10d/0x4d0 [ 31.422485] rcu_core+0x8c8/0x2860 [ 31.422989] __do_softirq+0x1b7/0x7d4 [ 31.423534] [ 31.423779] Last potentially related work creation: [ 31.424452] kasan_save_stack+0x22/0x50 [ 31.425036] __kasan_record_aux_stack+0x8e/0xa0 [ 31.425717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.426462] remove_vma+0x139/0x170 [ 31.426985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.427634] do_vmi_munmap+0x1f1/0x2b0 [ 31.428199] __vm_munmap+0x138/0x3a0 [ 31.428744] __x64_sys_munmap+0x59/0x80 [ 31.429339] do_syscall_64+0x3f/0x90 [ 31.429891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.430643] [ 31.430927] Second to last potentially related work creation: [ 31.431728] kasan_save_stack+0x22/0x50 [ 31.432319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.432992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.433761] remove_vma+0x139/0x170 [ 31.434295] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.434951] do_vmi_munmap+0x1f1/0x2b0 [ 31.435524] mmap_region+0x1f9/0x2660 [ 31.436091] do_mmap+0x854/0xf00 [ 31.436596] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.437171] ksys_mmap_pgoff+0x3af/0x500 [ 31.437768] do_syscall_64+0x3f/0x90 [ 31.438328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439082] [ 31.439334] The buggy address belongs to the object at ffff88800d997658 [ 31.439334] which belongs to the cache vm_area_struct of size 168 [ 31.441051] The buggy address is located 88 bytes inside of [ 31.441051] freed 168-byte region [ffff88800d997658, ffff88800d997700) [ 31.443018] [ 31.443312] The buggy address belongs to the physical page: [ 31.444196] page:000000006a81ae6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd997 [ 31.445710] memcg:ffff88800d950201 [ 31.446286] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.447226] page_type: 0xffffffff() [ 31.447838] raw: 0100000000000200 ffff88800879fc80 ffffea0000331a00 dead000000000003 [ 31.449090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d950201 [ 31.450317] page dumped because: kasan: bad access detected [ 31.451206] [ 31.451499] Memory state around the buggy address: [ 31.452277] ffff88800d997580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.453467] ffff88800d997600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.454555] >ffff88800d997680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.455527] ^ [ 31.456186] ffff88800d997700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.457157] ffff88800d997780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.458133] ================================================================== [ 31.459298] Disabling lock debugging due to kernel taint [ 33.690661] BUG: Bad rss-counter state mm:00000000d153164b type:MM_FILEPAGES val:33 [ 33.691679] BUG: Bad rss-counter state mm:00000000d153164b type:MM_ANONPAGES val:22 [ 34.198765] BUG: Bad rss-counter state mm:00000000e52b8db1 type:MM_FILEPAGES val:33 [ 34.199924] BUG: Bad rss-counter state mm:00000000e52b8db1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35090' (ECDSA) to the list of known hosts. 2023/06/19 23:04:14 fuzzer started 2023/06/19 23:04:14 dialing manager at localhost:44161 2023/06/19 23:04:14 checking machine... 2023/06/19 23:04:14 checking revisions... [ 34.865065] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:04:14 testing simple program... [ 34.913017] cgroup: Unknown subsys name 'net' [ 34.964367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008f92000 RCX=0000000000000000 RDX=ffff888019c1b680 RSI=ffffffff818df4c1 RDI=ffff8880192b5e50 RBP=ffff8880192b5cc0 RSP=ffff88800eff7ca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff8880192b5d48 R15=ffff8880192b5d98 RIP=ffffffff814c081b 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 00007fb088111900 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=00007fffad823000 CR3=000000000e02c000 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=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 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=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f84275d2630 CR3=000000000ef96000 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=d8cf072cbbed00907043d79e39af0af6 XMM02=ec2efd57dc4c00df000000000011f8d8 XMM03=c6a5df14a4c1d5cd000000000011f9a8 XMM04=35295cad970cb6de00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134ef8 XMM06=9fcbda4e80a1e34a0000000000133d60 XMM07=e042d86d42eb936e0000000000124290 XMM08=c6a5df14a4c1d5cd000000000011f9a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000