syzkaller login: [ 31.169031] BUG: Bad rss-counter state mm:0000000084fe4ed4 type:MM_FILEPAGES val:33 [ 31.171107] BUG: Bad rss-counter state mm:0000000084fe4ed4 type:MM_ANONPAGES val:22 [ 31.340683] ================================================================== [ 31.341688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.342700] Read of size 8 at addr ffff88800fe17880 by task sshd/223 [ 31.343676] [ 31.343908] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.344846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.345900] Call Trace: [ 31.346258] [ 31.346558] dump_stack_lvl+0x91/0xf0 [ 31.347089] print_report+0xcc/0x620 [ 31.347609] ? __virt_addr_valid+0x102/0x340 [ 31.348193] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.349503] kasan_report+0xbe/0xf0 [ 31.350016] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350680] vma_interval_tree_remove+0xc75/0xec0 [ 31.351325] vma_prepare+0xc54/0x11a0 [ 31.351835] __split_vma+0x5af/0x950 [ 31.352346] ? __pfx___split_vma+0x10/0x10 [ 31.352917] ? find_held_lock+0x2c/0x110 [ 31.353477] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.354108] ? lock_is_held_type+0x9f/0x120 [ 31.354689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.355343] ? mtree_range_walk+0x632/0x900 [ 31.355944] ? mas_walk+0x5c7/0x7c0 [ 31.356462] do_vmi_munmap+0x1f1/0x2b0 [ 31.356998] mmap_region+0x1f9/0x2660 [ 31.357520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.358073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.358859] ? __pfx_lock_acquire+0x10/0x10 [ 31.359439] ? __pfx_mmap_region+0x10/0x10 [ 31.360019] ? security_mmap_addr+0x7d/0xa0 [ 31.360589] ? get_unmapped_area+0x1f5/0x3f0 [ 31.361192] do_mmap+0x854/0xf00 [ 31.361673] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.362225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.362843] ksys_mmap_pgoff+0x3af/0x500 [ 31.363389] do_syscall_64+0x3f/0x90 [ 31.363910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364611] RIP: 0033:0x7f4845146d82 [ 31.365112] 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 [ 31.367454] RSP: 002b:00007ffd0da5b448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.368432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4845146d82 [ 31.369342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4844580000 [ 31.370254] RBP: 00007f4844580000 R08: 0000000000000009 R09: 0000000000001000 [ 31.371162] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e94a5fec0 [ 31.372066] R13: 00007ffd0da5b460 R14: 00007ffd0da5b490 R15: 00007ffd0da5b7f0 [ 31.372987] [ 31.373297] [ 31.373525] Allocated by task 215: [ 31.373999] kasan_save_stack+0x22/0x50 [ 31.374545] kasan_set_track+0x25/0x30 [ 31.375083] __kasan_slab_alloc+0x59/0x70 [ 31.375639] kmem_cache_alloc+0x16b/0x370 [ 31.376192] vm_area_dup+0x20/0x160 [ 31.376679] __split_vma+0x170/0x950 [ 31.377186] split_vma+0xc6/0x110 [ 31.377656] mprotect_fixup+0x8d2/0xb30 [ 31.378209] do_mprotect_pkey+0x87e/0xd40 [ 31.378768] __x64_sys_mprotect+0x78/0xc0 [ 31.379340] do_syscall_64+0x3f/0x90 [ 31.379851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380542] [ 31.380769] Freed by task 19: [ 31.381177] kasan_save_stack+0x22/0x50 [ 31.381724] kasan_set_track+0x25/0x30 [ 31.382259] kasan_save_free_info+0x2b/0x50 [ 31.382840] __kasan_slab_free+0x10a/0x190 [ 31.383413] kmem_cache_free+0x10d/0x4d0 [ 31.383959] rcu_core+0x8c8/0x2860 [ 31.384517] __do_softirq+0x1b7/0x7d4 [ 31.385034] [ 31.385272] Last potentially related work creation: [ 31.385899] kasan_save_stack+0x22/0x50 [ 31.386458] __kasan_record_aux_stack+0x8e/0xa0 [ 31.387079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.387767] remove_vma+0x139/0x170 [ 31.388259] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.388859] do_vmi_munmap+0x1f1/0x2b0 [ 31.389377] __vm_munmap+0x138/0x3a0 [ 31.389877] __x64_sys_munmap+0x59/0x80 [ 31.390420] do_syscall_64+0x3f/0x90 [ 31.390966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.391662] [ 31.391898] The buggy address belongs to the object at ffff88800fe17828 [ 31.391898] which belongs to the cache vm_area_struct of size 168 [ 31.393476] The buggy address is located 88 bytes inside of [ 31.393476] freed 168-byte region [ffff88800fe17828, ffff88800fe178d0) [ 31.395020] [ 31.395260] The buggy address belongs to the physical page: [ 31.395978] page:0000000021aba175 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe17 [ 31.397156] memcg:ffff88801a45c601 [ 31.397615] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.398322] page_type: 0xffffffff() [ 31.398813] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.399809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a45c601 [ 31.400783] page dumped because: kasan: bad access detected [ 31.401483] [ 31.401714] Memory state around the buggy address: [ 31.402344] ffff88800fe17780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.403258] ffff88800fe17800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.404178] >ffff88800fe17880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.405096] ^ [ 31.405548] ffff88800fe17900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.406479] ffff88800fe17980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.407392] ================================================================== [ 31.408438] Disabling lock debugging due to kernel taint [ 33.409352] BUG: Bad rss-counter state mm:0000000026f2e500 type:MM_FILEPAGES val:33 [ 33.410832] BUG: Bad rss-counter state mm:0000000026f2e500 type:MM_ANONPAGES val:22 [ 33.895384] BUG: Bad rss-counter state mm:0000000016b9735b type:MM_FILEPAGES val:33 [ 33.896383] BUG: Bad rss-counter state mm:0000000016b9735b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40931' (ECDSA) to the list of known hosts. 2023/06/21 10:39:24 fuzzer started 2023/06/21 10:39:25 dialing manager at localhost:36067 2023/06/21 10:39:25 checking machine... 2023/06/21 10:39:25 checking revisions... [ 34.559948] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:39:25 testing simple program... [ 34.605817] cgroup: Unknown subsys name 'net' [ 34.657101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:39:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83640611 RDX=0000000000026406 RSI=0000000000026406 RDI=ffffffff86582a08 RBP=ffff88800fe6f2b0 RSP=ffff88800fe6f1e8 R8 =0000000000000000 R9 =ffff88800fe6f298 R10=0000000000038001 R11=000000000008ab47 R12=ffff88800fe6f2b8 R13=ffff88800fe6f2a0 R14=ffff88800fe6f299 R15=ffff88800fe6f258 RIP=ffffffff811307c2 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 00007f49dcdb3900 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=00007f49dd36a618 CR3=00000000196c8000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff864bce01 RDX=1ffff1100d9e136e RSI=ffffffff8451349f RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff864bce30 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800d6a0ec0 RIP=ffffffff813ad496 RFL=00000296 [--S-AP-] 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 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=00007f896eb3e300 CR3=0000000014240000 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=2034323a39333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a39333a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000