syzkaller login: [ 76.203284] BUG: Bad rss-counter state mm:00000000008e6333 type:MM_FILEPAGES val:33 [ 76.204359] BUG: Bad rss-counter state mm:00000000008e6333 type:MM_ANONPAGES val:22 [ 76.370908] ================================================================== [ 76.371892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 76.372880] Read of size 8 at addr ffff88800de7aed8 by task sshd/220 [ 76.373790] [ 76.374058] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 76.375172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 76.376195] Call Trace: [ 76.376530] [ 76.376831] dump_stack_lvl+0x91/0xf0 [ 76.377350] print_report+0xcc/0x620 [ 76.377860] ? __virt_addr_valid+0x102/0x340 [ 76.378449] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.379107] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.379764] kasan_report+0xbe/0xf0 [ 76.380268] ? vma_interval_tree_remove+0xc75/0xec0 [ 76.380938] vma_interval_tree_remove+0xc75/0xec0 [ 76.381583] vma_prepare+0xc54/0x11a0 [ 76.382093] __split_vma+0x5af/0x950 [ 76.382604] ? __pfx___split_vma+0x10/0x10 [ 76.383167] ? find_held_lock+0x2c/0x110 [ 76.383719] do_vmi_align_munmap+0x2ba/0x11f0 [ 76.384322] ? lock_is_held_type+0x9f/0x120 [ 76.384896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 76.385544] ? mtree_range_walk+0x632/0x900 [ 76.386134] ? mas_walk+0x5c7/0x7c0 [ 76.386652] do_vmi_munmap+0x1f1/0x2b0 [ 76.387174] mmap_region+0x1f9/0x2660 [ 76.387691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 76.388233] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 76.388990] ? __pfx_lock_acquire+0x10/0x10 [ 76.389561] ? __pfx_mmap_region+0x10/0x10 [ 76.390124] ? security_mmap_addr+0x7d/0xa0 [ 76.390702] ? get_unmapped_area+0x1f5/0x3f0 [ 76.391289] do_mmap+0x854/0xf00 [ 76.391759] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.392286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 76.392889] ksys_mmap_pgoff+0x3af/0x500 [ 76.393433] do_syscall_64+0x3f/0x90 [ 76.393940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.394643] RIP: 0033:0x7efed5fc1d82 [ 76.395127] 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 [ 76.397391] RSP: 002b:00007fff41bd2688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 76.398358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efed5fc1d82 [ 76.399273] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efed53fb000 [ 76.400206] RBP: 00007efed53fb000 R08: 0000000000000009 R09: 0000000000001000 [ 76.401121] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc999e0ec0 [ 76.402026] R13: 00007fff41bd26a0 R14: 00007fff41bd26d0 R15: 00007fff41bd2a30 [ 76.402954] [ 76.403265] [ 76.403495] Allocated by task 213: [ 76.403973] kasan_save_stack+0x22/0x50 [ 76.404516] kasan_set_track+0x25/0x30 [ 76.405048] __kasan_slab_alloc+0x59/0x70 [ 76.405610] kmem_cache_alloc+0x16b/0x370 [ 76.406163] vm_area_dup+0x20/0x160 [ 76.406671] __split_vma+0x170/0x950 [ 76.407168] split_vma+0xc6/0x110 [ 76.407636] mprotect_fixup+0x8d2/0xb30 [ 76.408172] do_mprotect_pkey+0x87e/0xd40 [ 76.408736] __x64_sys_mprotect+0x78/0xc0 [ 76.409291] do_syscall_64+0x3f/0x90 [ 76.409795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.410483] [ 76.410716] Freed by task 19: [ 76.411127] kasan_save_stack+0x22/0x50 [ 76.411668] kasan_set_track+0x25/0x30 [ 76.412196] kasan_save_free_info+0x2b/0x50 [ 76.412765] __kasan_slab_free+0x10a/0x190 [ 76.413337] kmem_cache_free+0x10d/0x4d0 [ 76.413880] rcu_core+0x8c8/0x2860 [ 76.414356] __do_softirq+0x1b7/0x7d4 [ 76.414886] [ 76.415197] Last potentially related work creation: [ 76.415827] kasan_save_stack+0x22/0x50 [ 76.416366] __kasan_record_aux_stack+0x8e/0xa0 [ 76.416984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.417677] remove_vma+0x139/0x170 [ 76.418160] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.418778] do_vmi_munmap+0x1f1/0x2b0 [ 76.419298] __vm_munmap+0x138/0x3a0 [ 76.419797] __x64_sys_munmap+0x59/0x80 [ 76.420327] do_syscall_64+0x3f/0x90 [ 76.420830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.421510] [ 76.421746] Second to last potentially related work creation: [ 76.422488] kasan_save_stack+0x22/0x50 [ 76.423027] __kasan_record_aux_stack+0x8e/0xa0 [ 76.423644] __call_rcu_common.constprop.0+0x6a/0xb90 [ 76.424330] remove_vma+0x139/0x170 [ 76.424811] do_vmi_align_munmap+0xd4a/0x11f0 [ 76.425411] do_vmi_munmap+0x1f1/0x2b0 [ 76.425929] mmap_region+0x1f9/0x2660 [ 76.426457] do_mmap+0x854/0xf00 [ 76.426924] vm_mmap_pgoff+0x1a6/0x3a0 [ 76.427451] ksys_mmap_pgoff+0x3af/0x500 [ 76.427993] do_syscall_64+0x3f/0x90 [ 76.428499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 76.429184] [ 76.429414] The buggy address belongs to the object at ffff88800de7ae80 [ 76.429414] which belongs to the cache vm_area_struct of size 168 [ 76.430990] The buggy address is located 88 bytes inside of [ 76.430990] freed 168-byte region [ffff88800de7ae80, ffff88800de7af28) [ 76.432492] [ 76.432726] The buggy address belongs to the physical page: [ 76.433431] page:0000000007260261 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde7a [ 76.434603] memcg:ffff888017f72501 [ 76.435061] flags: 0x100000000000200(slab|node=0|zone=1) [ 76.435747] page_type: 0xffffffff() [ 76.436226] raw: 0100000000000200 ffff88800879fc80 ffffea00005fd8c0 000000000000000a [ 76.437215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f72501 [ 76.438179] page dumped because: kasan: bad access detected [ 76.438915] [ 76.439148] Memory state around the buggy address: [ 76.439763] ffff88800de7ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 76.440676] ffff88800de7ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 76.441587] >ffff88800de7ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 76.442504] ^ [ 76.443280] ffff88800de7af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 76.444194] ffff88800de7af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 76.445096] ================================================================== [ 76.446181] Disabling lock debugging due to kernel taint [ 78.365888] BUG: Bad rss-counter state mm:00000000a5bd4860 type:MM_FILEPAGES val:33 [ 78.366884] BUG: Bad rss-counter state mm:00000000a5bd4860 type:MM_ANONPAGES val:22 [ 78.859650] BUG: Bad rss-counter state mm:00000000137bcdb1 type:MM_FILEPAGES val:33 [ 78.860854] BUG: Bad rss-counter state mm:00000000137bcdb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38193' (ECDSA) to the list of known hosts. 2023/06/19 11:46:09 fuzzer started 2023/06/19 11:46:09 dialing manager at localhost:44161 2023/06/19 11:46:09 checking machine... 2023/06/19 11:46:09 checking revisions... [ 79.540537] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:46:09 testing simple program... [ 79.593393] cgroup: Unknown subsys name 'net' [ 79.639962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff852c82b0 RCX=0000000000000000 RDX=000000000000006e RSI=ffff88801000fe30 RDI=ffff888015ebc800 RBP=ffff88801000fe30 RSP=ffff88801000fd68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801b400b80 R13=000000000000006e R14=ffff888015ebc800 R15=ffff88801b400b80 RIP=ffffffff81f11bc2 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 00007fb5dbcf4900 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=00007fb5dc2a9650 CR3=0000000018140000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=0000000000000001 RCX=ffffffff818d60b7 RDX=ffff888010331b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018d2c591 RSP=ffff8880146af710 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=3830306234386136 R12=000000000000022c R13=0000000000000200 R14=ffffffff87f32ae8 R15=ffffffff87f32ae8 RIP=ffffffff814c07eb 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 00007f6eacea9900 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=00007f6eac305610 CR3=0000000013a5c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f5cf3fc72bccee9100000000000ae988 XMM05=41e0dd5b4aaa0915000000000013a960 XMM06=19e9129bd510f23500000000001397f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000