syzkaller login: [ 28.795769] BUG: Bad rss-counter state mm:00000000f3d3d486 type:MM_FILEPAGES val:33 [ 28.796444] BUG: Bad rss-counter state mm:00000000f3d3d486 type:MM_ANONPAGES val:22 [ 28.914480] ================================================================== [ 28.915102] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.915770] Read of size 8 at addr ffff88800db465c8 by task sshd/219 [ 28.916292] [ 28.916445] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.917060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.917764] Call Trace: [ 28.917982] [ 28.918186] dump_stack_lvl+0x91/0xf0 [ 28.918534] print_report+0xcc/0x620 [ 28.918883] ? __virt_addr_valid+0x102/0x340 [ 28.919352] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.919793] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920216] kasan_report+0xbe/0xf0 [ 28.920540] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.920980] vma_interval_tree_remove+0xc75/0xec0 [ 28.921400] vma_prepare+0xc54/0x11a0 [ 28.921735] __split_vma+0x5af/0x950 [ 28.922064] ? __pfx___split_vma+0x10/0x10 [ 28.922432] ? find_held_lock+0x2c/0x110 [ 28.922799] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.923186] ? lock_is_held_type+0x9f/0x120 [ 28.923570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.923989] ? mtree_range_walk+0x632/0x900 [ 28.924381] ? mas_walk+0x5c7/0x7c0 [ 28.924708] do_vmi_munmap+0x1f1/0x2b0 [ 28.925066] mmap_region+0x1f9/0x2660 [ 28.925395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.925752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.926252] ? __pfx_lock_acquire+0x10/0x10 [ 28.926621] ? __pfx_mmap_region+0x10/0x10 [ 28.926995] ? security_mmap_addr+0x7d/0xa0 [ 28.927362] ? get_unmapped_area+0x1f5/0x3f0 [ 28.927757] do_mmap+0x854/0xf00 [ 28.928062] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.928412] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.928808] ksys_mmap_pgoff+0x3af/0x500 [ 28.929164] do_syscall_64+0x3f/0x90 [ 28.929496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929961] RIP: 0033:0x7f1ec8acad82 [ 28.930278] 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 [ 28.931775] RSP: 002b:00007fff384dd5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.932403] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ec8acad82 [ 28.933016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ec7f04000 [ 28.933595] RBP: 00007f1ec7f04000 R08: 0000000000000009 R09: 0000000000001000 [ 28.934184] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563738b75d90 [ 28.934762] R13: 00007fff384dd5d0 R14: 00007fff384dd600 R15: 00007fff384dd960 [ 28.935355] [ 28.935555] [ 28.935701] Allocated by task 211: [ 28.936008] kasan_save_stack+0x22/0x50 [ 28.936357] kasan_set_track+0x25/0x30 [ 28.936704] __kasan_slab_alloc+0x59/0x70 [ 28.937081] kmem_cache_alloc+0x16b/0x370 [ 28.937441] vm_area_dup+0x20/0x160 [ 28.937765] __split_vma+0x170/0x950 [ 28.938091] split_vma+0xc6/0x110 [ 28.938404] mprotect_fixup+0x8d2/0xb30 [ 28.938765] do_mprotect_pkey+0x87e/0xd40 [ 28.939138] __x64_sys_mprotect+0x78/0xc0 [ 28.939500] do_syscall_64+0x3f/0x90 [ 28.939828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940280] [ 28.940428] Freed by task 211: [ 28.940704] kasan_save_stack+0x22/0x50 [ 28.941059] kasan_set_track+0x25/0x30 [ 28.941415] kasan_save_free_info+0x2b/0x50 [ 28.941777] __kasan_slab_free+0x10a/0x190 [ 28.942143] kmem_cache_free+0x10d/0x4d0 [ 28.942485] rcu_core+0x8c8/0x2860 [ 28.942797] __do_softirq+0x1b7/0x7d4 [ 28.943126] [ 28.943272] Last potentially related work creation: [ 28.943673] kasan_save_stack+0x22/0x50 [ 28.944024] __kasan_record_aux_stack+0x8e/0xa0 [ 28.944419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.944861] remove_vma+0x139/0x170 [ 28.945182] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.945571] do_vmi_munmap+0x1f1/0x2b0 [ 28.945909] __vm_munmap+0x138/0x3a0 [ 28.946232] __x64_sys_munmap+0x59/0x80 [ 28.946578] do_syscall_64+0x3f/0x90 [ 28.946912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947359] [ 28.947507] The buggy address belongs to the object at ffff88800db46570 [ 28.947507] which belongs to the cache vm_area_struct of size 168 [ 28.948530] The buggy address is located 88 bytes inside of [ 28.948530] freed 168-byte region [ffff88800db46570, ffff88800db46618) [ 28.949523] [ 28.949674] The buggy address belongs to the physical page: [ 28.950131] page:00000000e68f0986 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb46 [ 28.950879] memcg:ffff88800e7ded01 [ 28.951173] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.951616] page_type: 0xffffffff() [ 28.951925] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.952558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ded01 [ 28.953195] page dumped because: kasan: bad access detected [ 28.953642] [ 28.953790] Memory state around the buggy address: [ 28.954186] ffff88800db46480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.954771] ffff88800db46500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.955360] >ffff88800db46580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.955941] ^ [ 28.956393] ffff88800db46600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.956987] ffff88800db46680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.957571] ================================================================== [ 28.958290] Disabling lock debugging due to kernel taint [ 30.776688] BUG: Bad rss-counter state mm:00000000dff839d4 type:MM_FILEPAGES val:33 [ 30.777916] BUG: Bad rss-counter state mm:00000000dff839d4 type:MM_ANONPAGES val:22 [ 31.198313] BUG: Bad rss-counter state mm:0000000009117fbe type:MM_FILEPAGES val:33 [ 31.199641] BUG: Bad rss-counter state mm:0000000009117fbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12026' (ECDSA) to the list of known hosts. 2023/06/21 04:40:59 fuzzer started 2023/06/21 04:40:59 dialing manager at localhost:36067 2023/06/21 04:40:59 checking machine... 2023/06/21 04:40:59 checking revisions... [ 31.937163] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:41:00 testing simple program... [ 31.982522] cgroup: Unknown subsys name 'net' [ 32.032457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe00135b28 CR3=000000000c564000 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=2039353a30343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a30343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c96405 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b202e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b2030 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88801ca9ff58 R15=ffff88806cf09a98 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f2dc60c0900 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=00007f2dc6677618 CR3=000000000f1ce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000