syzkaller login: [ 31.297982] BUG: Bad rss-counter state mm:000000003d6c73bc type:MM_FILEPAGES val:33 [ 31.298985] BUG: Bad rss-counter state mm:000000003d6c73bc type:MM_ANONPAGES val:22 [ 31.464199] ================================================================== [ 31.465175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.466128] Read of size 8 at addr ffff8880094963f8 by task sshd/220 [ 31.467040] [ 31.467260] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.468138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.469139] Call Trace: [ 31.469456] [ 31.469740] dump_stack_lvl+0x91/0xf0 [ 31.470224] print_report+0xcc/0x620 [ 31.470706] ? __virt_addr_valid+0x102/0x340 [ 31.471252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.471871] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472529] kasan_report+0xbe/0xf0 [ 31.473012] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.473627] vma_interval_tree_remove+0xc75/0xec0 [ 31.474234] vma_prepare+0xc54/0x11a0 [ 31.474716] __split_vma+0x5af/0x950 [ 31.475192] ? __pfx___split_vma+0x10/0x10 [ 31.475739] ? find_held_lock+0x2c/0x110 [ 31.476267] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.476836] ? lock_is_held_type+0x9f/0x120 [ 31.477381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.477989] ? mtree_range_walk+0x632/0x900 [ 31.478536] ? mas_walk+0x5c7/0x7c0 [ 31.479005] do_vmi_munmap+0x1f1/0x2b0 [ 31.479495] mmap_region+0x1f9/0x2660 [ 31.479980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.480495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.481203] ? __pfx_lock_acquire+0x10/0x10 [ 31.481744] ? __pfx_mmap_region+0x10/0x10 [ 31.482270] ? security_mmap_addr+0x7d/0xa0 [ 31.482802] ? get_unmapped_area+0x1f5/0x3f0 [ 31.483344] do_mmap+0x854/0xf00 [ 31.483791] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.484302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.484857] ksys_mmap_pgoff+0x3af/0x500 [ 31.485364] do_syscall_64+0x3f/0x90 [ 31.485835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.486478] RIP: 0033:0x7f8d31d8cd82 [ 31.486934] 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 [ 31.489035] RSP: 002b:00007ffe89168ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.489931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d31d8cd82 [ 31.490773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d311c6000 [ 31.491602] RBP: 00007f8d311c6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.492450] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639c1665d90 [ 31.493293] R13: 00007ffe89168ad0 R14: 00007ffe89168b00 R15: 00007ffe89168e60 [ 31.494147] [ 31.494440] [ 31.494655] Allocated by task 213: [ 31.495082] kasan_save_stack+0x22/0x50 [ 31.495593] kasan_set_track+0x25/0x30 [ 31.496107] __kasan_slab_alloc+0x59/0x70 [ 31.496637] kmem_cache_alloc+0x16b/0x370 [ 31.497171] vm_area_dup+0x20/0x160 [ 31.497621] __split_vma+0x170/0x950 [ 31.498084] split_vma+0xc6/0x110 [ 31.498518] mprotect_fixup+0x8d2/0xb30 [ 31.499018] do_mprotect_pkey+0x87e/0xd40 [ 31.499532] __x64_sys_mprotect+0x78/0xc0 [ 31.500060] do_syscall_64+0x3f/0x90 [ 31.500529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501174] [ 31.501388] Freed by task 213: [ 31.501776] kasan_save_stack+0x22/0x50 [ 31.502275] kasan_set_track+0x25/0x30 [ 31.502771] kasan_save_free_info+0x2b/0x50 [ 31.503298] __kasan_slab_free+0x10a/0x190 [ 31.503832] kmem_cache_free+0x10d/0x4d0 [ 31.504342] rcu_core+0x8c8/0x2860 [ 31.504783] __do_softirq+0x1b7/0x7d4 [ 31.505262] [ 31.505475] Last potentially related work creation: [ 31.506058] kasan_save_stack+0x22/0x50 [ 31.506555] __kasan_record_aux_stack+0x8e/0xa0 [ 31.507135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.507820] remove_vma+0x139/0x170 [ 31.508297] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.508856] do_vmi_munmap+0x1f1/0x2b0 [ 31.509334] __vm_munmap+0x138/0x3a0 [ 31.509804] __x64_sys_munmap+0x59/0x80 [ 31.510303] do_syscall_64+0x3f/0x90 [ 31.510769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.511403] [ 31.511622] The buggy address belongs to the object at ffff8880094963a0 [ 31.511622] which belongs to the cache vm_area_struct of size 168 [ 31.513092] The buggy address is located 88 bytes inside of [ 31.513092] freed 168-byte region [ffff8880094963a0, ffff888009496448) [ 31.514479] [ 31.514695] The buggy address belongs to the physical page: [ 31.515341] page:00000000189fce57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9496 [ 31.516431] memcg:ffff8880168a3d01 [ 31.516851] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.517494] page_type: 0xffffffff() [ 31.517944] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.518852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168a3d01 [ 31.519749] page dumped because: kasan: bad access detected [ 31.520405] [ 31.520619] Memory state around the buggy address: [ 31.521197] ffff888009496280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.522038] ffff888009496300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.522890] >ffff888009496380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.523735] ^ [ 31.524592] ffff888009496400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.525437] ffff888009496480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.526282] ================================================================== [ 31.527200] Disabling lock debugging due to kernel taint [ 33.656349] BUG: Bad rss-counter state mm:000000004f5140dc type:MM_FILEPAGES val:33 [ 33.657330] BUG: Bad rss-counter state mm:000000004f5140dc type:MM_ANONPAGES val:22 [ 34.177479] BUG: Bad rss-counter state mm:00000000b2af2586 type:MM_FILEPAGES val:33 [ 34.178700] BUG: Bad rss-counter state mm:00000000b2af2586 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64405' (ECDSA) to the list of known hosts. 2023/06/20 04:57:15 fuzzer started 2023/06/20 04:57:15 dialing manager at localhost:44161 2023/06/20 04:57:15 checking machine... 2023/06/20 04:57:15 checking revisions... [ 34.903657] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:57:15 testing simple program... [ 34.952823] cgroup: Unknown subsys name 'net' [ 34.990540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:57:14 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7fe01 RSI=ffff888008d7fe58 RDI=ffff888008d7f988 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8f0 R8 =ffffffff860d1680 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008d7f9d8 R13=ffff888008d78000 R14=ffff888008d7fe60 R15=ffff888008d7f978 RIP=ffffffff811304d1 RFL=00000286 [--S--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=00007ffd4dfd7248 CR3=0000000016138000 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=37353a3430203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035313a3735 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000f8953558 RCX=ffff88806c69aac0 RDX=000000000000000e RSI=0000000000000001 RDI=0000000042f6d5f1 RBP=ffff88800da485a0 RSP=ffff88800c537a28 R8 =0000000027534412 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88800c537a90 R15=000000000000000e RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007fae3d273900 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=00007fae3d82a618 CR3=000000000f4ee000 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=563412feff00545000000000000080fe 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