syzkaller login: [ 31.196832] BUG: Bad rss-counter state mm:00000000ec6ee051 type:MM_FILEPAGES val:33 [ 31.198432] BUG: Bad rss-counter state mm:00000000ec6ee051 type:MM_ANONPAGES val:22 [ 31.349476] ================================================================== [ 31.350534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.351645] Read of size 8 at addr ffff88800dfc2b38 by task sshd/221 [ 31.352663] [ 31.352923] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.353950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.354943] Call Trace: [ 31.355263] [ 31.355544] dump_stack_lvl+0x91/0xf0 [ 31.356040] print_report+0xcc/0x620 [ 31.356523] ? __virt_addr_valid+0x102/0x340 [ 31.357081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357707] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358325] kasan_report+0xbe/0xf0 [ 31.358798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359430] vma_interval_tree_remove+0xc75/0xec0 [ 31.360036] vma_prepare+0xc54/0x11a0 [ 31.360514] __split_vma+0x5af/0x950 [ 31.361000] ? __pfx___split_vma+0x10/0x10 [ 31.361541] ? find_held_lock+0x2c/0x110 [ 31.362067] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.362636] ? lock_is_held_type+0x9f/0x120 [ 31.363184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.363789] ? mtree_range_walk+0x632/0x900 [ 31.364346] ? mas_walk+0x5c7/0x7c0 [ 31.364837] do_vmi_munmap+0x1f1/0x2b0 [ 31.365357] mmap_region+0x1f9/0x2660 [ 31.365863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.366377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.367090] ? __pfx_lock_acquire+0x10/0x10 [ 31.367624] ? __pfx_mmap_region+0x10/0x10 [ 31.368154] ? security_mmap_addr+0x7d/0xa0 [ 31.368695] ? get_unmapped_area+0x1f5/0x3f0 [ 31.369268] do_mmap+0x854/0xf00 [ 31.369715] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.370211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.370776] ksys_mmap_pgoff+0x3af/0x500 [ 31.371284] do_syscall_64+0x3f/0x90 [ 31.371763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372424] RIP: 0033:0x7fd450e07d82 [ 31.372891] 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 [ 31.375067] RSP: 002b:00007fff7fabe048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.375984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd450e07d82 [ 31.376834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd450241000 [ 31.377686] RBP: 00007fd450241000 R08: 0000000000000009 R09: 0000000000001000 [ 31.378532] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634bc7c2ec0 [ 31.379386] R13: 00007fff7fabe060 R14: 00007fff7fabe090 R15: 00007fff7fabe3f0 [ 31.380243] [ 31.380537] [ 31.380754] Allocated by task 213: [ 31.381195] kasan_save_stack+0x22/0x50 [ 31.381708] kasan_set_track+0x25/0x30 [ 31.382197] __kasan_slab_alloc+0x59/0x70 [ 31.382718] kmem_cache_alloc+0x16b/0x370 [ 31.383233] vm_area_dup+0x20/0x160 [ 31.383685] __split_vma+0x170/0x950 [ 31.384158] split_vma+0xc6/0x110 [ 31.384602] mprotect_fixup+0x8d2/0xb30 [ 31.385111] do_mprotect_pkey+0x87e/0xd40 [ 31.385653] __x64_sys_mprotect+0x78/0xc0 [ 31.386178] do_syscall_64+0x3f/0x90 [ 31.386656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.387299] [ 31.387520] Freed by task 213: [ 31.387915] kasan_save_stack+0x22/0x50 [ 31.388415] kasan_set_track+0x25/0x30 [ 31.388914] kasan_save_free_info+0x2b/0x50 [ 31.389455] __kasan_slab_free+0x10a/0x190 [ 31.389996] kmem_cache_free+0x10d/0x4d0 [ 31.390505] rcu_core+0x8c8/0x2860 [ 31.390957] __do_softirq+0x1b7/0x7d4 [ 31.391436] [ 31.391655] Last potentially related work creation: [ 31.392235] kasan_save_stack+0x22/0x50 [ 31.392740] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.394071] remove_vma+0x139/0x170 [ 31.394526] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.395094] do_vmi_munmap+0x1f1/0x2b0 [ 31.395589] __vm_munmap+0x138/0x3a0 [ 31.396060] __x64_sys_munmap+0x59/0x80 [ 31.396555] do_syscall_64+0x3f/0x90 [ 31.397037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397681] [ 31.397897] Second to last potentially related work creation: [ 31.398596] kasan_save_stack+0x22/0x50 [ 31.399104] __kasan_record_aux_stack+0x8e/0xa0 [ 31.399686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.400331] remove_vma+0x139/0x170 [ 31.400785] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.401357] do_vmi_munmap+0x1f1/0x2b0 [ 31.401854] __vm_munmap+0x138/0x3a0 [ 31.402333] elf_map+0x26f/0x310 [ 31.402782] load_elf_binary+0x3417/0x5030 [ 31.403320] bprm_execve+0x803/0x1940 [ 31.403790] do_execveat_common+0x734/0x8e0 [ 31.404313] __x64_sys_execve+0x93/0xc0 [ 31.404806] do_syscall_64+0x3f/0x90 [ 31.405295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405936] [ 31.406152] The buggy address belongs to the object at ffff88800dfc2ae0 [ 31.406152] which belongs to the cache vm_area_struct of size 168 [ 31.407639] The buggy address is located 88 bytes inside of [ 31.407639] freed 168-byte region [ffff88800dfc2ae0, ffff88800dfc2b88) [ 31.409072] [ 31.409296] The buggy address belongs to the physical page: [ 31.409964] page:000000000442b256 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc2 [ 31.411077] memcg:ffff88800dbf6701 [ 31.411507] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.412215] page_type: 0xffffffff() [ 31.412670] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.413598] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbf6701 [ 31.414511] page dumped because: kasan: bad access detected [ 31.415178] [ 31.415394] Memory state around the buggy address: [ 31.415989] ffff88800dfc2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.416857] ffff88800dfc2a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.417733] >ffff88800dfc2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.418579] ^ [ 31.419192] ffff88800dfc2b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.420050] ffff88800dfc2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.420905] ================================================================== [ 31.422001] Disabling lock debugging due to kernel taint [ 33.868540] BUG: Bad rss-counter state mm:0000000087673635 type:MM_FILEPAGES val:33 [ 33.869476] BUG: Bad rss-counter state mm:0000000087673635 type:MM_ANONPAGES val:22 [ 34.330737] BUG: Bad rss-counter state mm:0000000020d4bf3b type:MM_FILEPAGES val:33 [ 34.331726] BUG: Bad rss-counter state mm:0000000020d4bf3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18629' (ECDSA) to the list of known hosts. 2023/06/19 15:32:03 fuzzer started 2023/06/19 15:32:04 dialing manager at localhost:44161 2023/06/19 15:32:04 checking machine... 2023/06/19 15:32:04 checking revisions... [ 35.052357] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:32:04 testing simple program... [ 35.105031] cgroup: Unknown subsys name 'net' [ 35.144878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:01 Registers: info registers vcpu 0 RAX=0000000080000102 RBX=ffffffff8661f20f RCX=ffffffff813a0a8d RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =ffffffff8661f20f R10=ffffffffffffffff R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800c908540 RIP=ffffffff814c07eb 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 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=00007f59b2dfba50 CR3=000000000de72000 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=2033303a32333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000011 RBX=00007ffc7b795050 RCX=00007f9ac186d440 RDX=00007f9ac10984c0 RSI=00007ffc7b794f00 RDI=0000000000000006 RBP=00007ffc7b795180 RSP=00007ffc7b794f00 R8 =0000000000000000 R9 =00007ffc7b795080 R10=000000000000002a R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002a R15=0000000000000000 RIP=00007f9ac1886afc RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9ac0cfb900 00000000 00000000 GS =0000 0000000000000000 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=00007f9ac0cca008 CR3=000000000d838000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000