syzkaller login: [ 29.195947] BUG: Bad rss-counter state mm:00000000a484fd09 type:MM_FILEPAGES val:33 [ 29.197483] BUG: Bad rss-counter state mm:00000000a484fd09 type:MM_ANONPAGES val:22 [ 29.264203] ================================================================== [ 29.265269] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.266342] Read of size 8 at addr ffff8880165d7058 by task sshd/220 [ 29.267218] [ 29.267468] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.268522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.269641] Call Trace: [ 29.270008] [ 29.270333] dump_stack_lvl+0x91/0xf0 [ 29.270899] print_report+0xcc/0x620 [ 29.271454] ? __virt_addr_valid+0x102/0x340 [ 29.272086] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.272792] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.273498] kasan_report+0xbe/0xf0 [ 29.274063] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.274792] vma_interval_tree_remove+0xc75/0xec0 [ 29.275649] vma_prepare+0xc54/0x11a0 [ 29.276227] __split_vma+0x5af/0x950 [ 29.276874] ? __pfx___split_vma+0x10/0x10 [ 29.277529] ? find_held_lock+0x2c/0x110 [ 29.278201] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.278867] ? lock_is_held_type+0x9f/0x120 [ 29.279500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.280221] ? mtree_range_walk+0x632/0x900 [ 29.280889] ? mas_walk+0x5c7/0x7c0 [ 29.281455] do_vmi_munmap+0x1f1/0x2b0 [ 29.282037] mmap_region+0x1f9/0x2660 [ 29.282610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.283215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.284048] ? __pfx_lock_acquire+0x10/0x10 [ 29.284703] ? __pfx_mmap_region+0x10/0x10 [ 29.285324] ? security_mmap_addr+0x7d/0xa0 [ 29.285949] ? get_unmapped_area+0x1f5/0x3f0 [ 29.286588] do_mmap+0x854/0xf00 [ 29.287097] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.287671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.288325] ksys_mmap_pgoff+0x3af/0x500 [ 29.288929] do_syscall_64+0x3f/0x90 [ 29.289495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.290254] RIP: 0033:0x7f63447d7d82 [ 29.290783] 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 [ 29.293292] RSP: 002b:00007ffc3d614168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.294346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63447d7d82 [ 29.295344] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6343c11000 [ 29.296341] RBP: 00007f6343c11000 R08: 0000000000000009 R09: 0000000000001000 [ 29.297347] R10: 0000000000000812 R11: 0000000000000206 R12: 000056445c456ec0 [ 29.298343] R13: 00007ffc3d614180 R14: 00007ffc3d6141b0 R15: 00007ffc3d614510 [ 29.299362] [ 29.299705] [ 29.299956] Allocated by task 213: [ 29.300458] kasan_save_stack+0x22/0x50 [ 29.301056] kasan_set_track+0x25/0x30 [ 29.301637] __kasan_slab_alloc+0x59/0x70 [ 29.302247] kmem_cache_alloc+0x16b/0x370 [ 29.302844] vm_area_dup+0x20/0x160 [ 29.303371] __split_vma+0x170/0x950 [ 29.303910] split_vma+0xc6/0x110 [ 29.304424] mprotect_fixup+0x8d2/0xb30 [ 29.305018] do_mprotect_pkey+0x87e/0xd40 [ 29.305619] __x64_sys_mprotect+0x78/0xc0 [ 29.306230] do_syscall_64+0x3f/0x90 [ 29.306777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.307534] [ 29.307780] Freed by task 213: [ 29.308226] kasan_save_stack+0x22/0x50 [ 29.308826] kasan_set_track+0x25/0x30 [ 29.309401] kasan_save_free_info+0x2b/0x50 [ 29.310017] __kasan_slab_free+0x10a/0x190 [ 29.310637] kmem_cache_free+0x10d/0x4d0 [ 29.311225] rcu_core+0x8c8/0x2860 [ 29.311744] __do_softirq+0x1b7/0x7d4 [ 29.312300] [ 29.312548] Last potentially related work creation: [ 29.313236] kasan_save_stack+0x22/0x50 [ 29.313824] __kasan_record_aux_stack+0x8e/0xa0 [ 29.314496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.315249] remove_vma+0x139/0x170 [ 29.315771] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.316418] do_vmi_munmap+0x1f1/0x2b0 [ 29.316998] __vm_munmap+0x138/0x3a0 [ 29.317540] __x64_sys_munmap+0x59/0x80 [ 29.318112] do_syscall_64+0x3f/0x90 [ 29.318664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.319413] [ 29.319662] The buggy address belongs to the object at ffff8880165d7000 [ 29.319662] which belongs to the cache vm_area_struct of size 168 [ 29.321386] The buggy address is located 88 bytes inside of [ 29.321386] freed 168-byte region [ffff8880165d7000, ffff8880165d70a8) [ 29.323026] [ 29.323277] The buggy address belongs to the physical page: [ 29.324044] page:000000007364120a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165d7 [ 29.325333] memcg:ffff88801bc32c01 [ 29.325826] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.326573] page_type: 0xffffffff() [ 29.327089] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.328143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc32c01 [ 29.329202] page dumped because: kasan: bad access detected [ 29.329960] [ 29.330208] Memory state around the buggy address: [ 29.330874] ffff8880165d6f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 29.331849] ffff8880165d6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.332860] >ffff8880165d7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.333851] ^ [ 29.334695] ffff8880165d7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.335674] ffff8880165d7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.336664] ================================================================== [ 29.337803] Disabling lock debugging due to kernel taint [ 31.557056] BUG: Bad rss-counter state mm:00000000a13af304 type:MM_FILEPAGES val:33 [ 31.558176] BUG: Bad rss-counter state mm:00000000a13af304 type:MM_ANONPAGES val:22 [ 32.034390] BUG: Bad rss-counter state mm:0000000020111d89 type:MM_FILEPAGES val:33 [ 32.035336] BUG: Bad rss-counter state mm:0000000020111d89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2885' (ECDSA) to the list of known hosts. 2023/06/21 04:09:44 fuzzer started 2023/06/21 04:09:44 dialing manager at localhost:36067 2023/06/21 04:09:44 checking machine... 2023/06/21 04:09:44 checking revisions... [ 32.779157] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:44 testing simple program... [ 32.833575] cgroup: Unknown subsys name 'net' [ 32.893757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e810300 RCX=ffffffff8175d311 RDX=ffff888015920000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800e4fd068 RSP=ffff88801591fae8 R8 =0000000000000006 R9 =000000000e931067 R10=000000000e931067 R11=00000000000b6d53 R12=ffff88800e931d98 R13=1ffff11002b23f62 R14=dffffc0000000000 R15=00007f19c1bb3000 RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f19c2763900 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=00007f19c1bb3660 CR3=0000000013830000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c029868bb5355ca900000000000ae988 XMM05=ef7efcbfb089097d0000000000132790 XMM06=4fda316b135da52b0000000000131830 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00005605230c8f08 CR3=0000000005482000 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=00007fd5ed434510000055f76bf6c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000