syzkaller login: [ 31.203097] BUG: Bad rss-counter state mm:0000000070e801a5 type:MM_FILEPAGES val:33 [ 31.204147] BUG: Bad rss-counter state mm:0000000070e801a5 type:MM_ANONPAGES val:22 [ 31.362370] ================================================================== [ 31.363261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.364164] Read of size 8 at addr ffff8880167d73f8 by task sshd/220 [ 31.364889] [ 31.365094] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.366038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.366961] Call Trace: [ 31.367262] [ 31.367531] dump_stack_lvl+0x91/0xf0 [ 31.368006] print_report+0xcc/0x620 [ 31.368467] ? __virt_addr_valid+0x102/0x340 [ 31.368995] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.369585] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370166] kasan_report+0xbe/0xf0 [ 31.370639] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371221] vma_interval_tree_remove+0xc75/0xec0 [ 31.371784] vma_prepare+0xc54/0x11a0 [ 31.372237] __split_vma+0x5af/0x950 [ 31.372687] ? __pfx___split_vma+0x10/0x10 [ 31.373192] ? find_held_lock+0x2c/0x110 [ 31.373686] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.374217] ? lock_is_held_type+0x9f/0x120 [ 31.374747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.375323] ? mtree_range_walk+0x632/0x900 [ 31.375846] ? mas_walk+0x5c7/0x7c0 [ 31.376297] do_vmi_munmap+0x1f1/0x2b0 [ 31.376760] mmap_region+0x1f9/0x2660 [ 31.377219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.377705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.378374] ? __pfx_lock_acquire+0x10/0x10 [ 31.378897] ? __pfx_mmap_region+0x10/0x10 [ 31.379397] ? security_mmap_addr+0x7d/0xa0 [ 31.379900] ? get_unmapped_area+0x1f5/0x3f0 [ 31.380415] do_mmap+0x854/0xf00 [ 31.380839] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.381301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.381841] ksys_mmap_pgoff+0x3af/0x500 [ 31.382319] do_syscall_64+0x3f/0x90 [ 31.382786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.383406] RIP: 0033:0x7f559ecabd82 [ 31.383851] 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 [ 31.385860] RSP: 002b:00007ffe4a5af9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.386726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f559ecabd82 [ 31.387525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f559e0e5000 [ 31.388331] RBP: 00007f559e0e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.389127] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c79055d90 [ 31.389925] R13: 00007ffe4a5af9c0 R14: 00007ffe4a5af9f0 R15: 00007ffe4a5afd50 [ 31.390748] [ 31.391027] [ 31.391230] Allocated by task 213: [ 31.391634] kasan_save_stack+0x22/0x50 [ 31.392107] kasan_set_track+0x25/0x30 [ 31.392573] __kasan_slab_alloc+0x59/0x70 [ 31.393062] kmem_cache_alloc+0x16b/0x370 [ 31.393551] vm_area_dup+0x20/0x160 [ 31.393991] __split_vma+0x170/0x950 [ 31.394426] split_vma+0xc6/0x110 [ 31.394858] mprotect_fixup+0x8d2/0xb30 [ 31.395329] do_mprotect_pkey+0x87e/0xd40 [ 31.395817] __x64_sys_mprotect+0x78/0xc0 [ 31.396307] do_syscall_64+0x3f/0x90 [ 31.396753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397356] [ 31.397560] Freed by task 213: [ 31.397936] kasan_save_stack+0x22/0x50 [ 31.398408] kasan_set_track+0x25/0x30 [ 31.398883] kasan_save_free_info+0x2b/0x50 [ 31.399381] __kasan_slab_free+0x10a/0x190 [ 31.399881] kmem_cache_free+0x10d/0x4d0 [ 31.400357] rcu_core+0x8c8/0x2860 [ 31.400811] __do_softirq+0x1b7/0x7d4 [ 31.401280] [ 31.401503] Last potentially related work creation: [ 31.402078] kasan_save_stack+0x22/0x50 [ 31.402606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.403824] remove_vma+0x139/0x170 [ 31.404268] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.404824] do_vmi_munmap+0x1f1/0x2b0 [ 31.405308] __vm_munmap+0x138/0x3a0 [ 31.405775] __x64_sys_munmap+0x59/0x80 [ 31.406277] do_syscall_64+0x3f/0x90 [ 31.406751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.407382] [ 31.407607] The buggy address belongs to the object at ffff8880167d73a0 [ 31.407607] which belongs to the cache vm_area_struct of size 168 [ 31.409058] The buggy address is located 88 bytes inside of [ 31.409058] freed 168-byte region [ffff8880167d73a0, ffff8880167d7448) [ 31.410450] [ 31.410689] The buggy address belongs to the physical page: [ 31.411348] page:000000008ae28e20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167d7 [ 31.412429] memcg:ffff888019cd6601 [ 31.412857] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.413492] page_type: 0xffffffff() [ 31.413939] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.414880] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cd6601 [ 31.415774] page dumped because: kasan: bad access detected [ 31.416419] [ 31.416637] Memory state around the buggy address: [ 31.417215] ffff8880167d7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.418098] ffff8880167d7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.418972] >ffff8880167d7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.419862] ^ [ 31.420735] ffff8880167d7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.421578] ffff8880167d7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.422421] ================================================================== [ 31.423472] Disabling lock debugging due to kernel taint [ 33.670629] BUG: Bad rss-counter state mm:00000000b38d37fb type:MM_FILEPAGES val:33 [ 33.671687] BUG: Bad rss-counter state mm:00000000b38d37fb type:MM_ANONPAGES val:22 [ 34.155986] BUG: Bad rss-counter state mm:000000009b8accec type:MM_FILEPAGES val:33 [ 34.157150] BUG: Bad rss-counter state mm:000000009b8accec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64717' (ECDSA) to the list of known hosts. 2023/06/21 05:38:35 fuzzer started 2023/06/21 05:38:35 dialing manager at localhost:36067 2023/06/21 05:38:35 checking machine... 2023/06/21 05:38:35 checking revisions... [ 34.922781] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:38:35 testing simple program... [ 34.976062] cgroup: Unknown subsys name 'net' [ 35.018426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:34 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=ffff888008c04000 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=00007fd9f9dff9b0 CR3=0000000010318000 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=00000000000000000000000000000000 XMM01=7147fa9c92ebdfb77c4a35a472354d00 XMM02=000000000011b5b8ec2efd57dc4c00df XMM03=0000000000122288822e67533f71995f XMM04=0e671c3c9ddbd07100000000000ae988 XMM05=19e9129bd510f2350000000000132110 XMM06=e5ed596ec61cbc4f0000000000130f78 XMM07=e042d86d42eb936e0000000000122508 XMM08=822e67533f71995f000000000011b618 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019c9fa10 RCX=0000000000000001 RDX=1ffff1100d9e1350 RSI=ffff888019c9fa00 RDI=ffff88806cf09a80 RBP=ffff888019c98000 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020c51 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff888019c9fa00 R15=ffff88806cf09a70 RIP=ffffffff81131ca6 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 00007f475641a700 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=00007fa9892870b0 CR3=000000000ff8c000 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=2034333a38333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38333a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000