syzkaller login: [ 30.916866] BUG: Bad rss-counter state mm:000000003577b8e8 type:MM_FILEPAGES val:33 [ 30.917573] BUG: Bad rss-counter state mm:000000003577b8e8 type:MM_ANONPAGES val:22 [ 31.040246] ================================================================== [ 31.040873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.041478] Read of size 8 at addr ffff888016881058 by task sshd/221 [ 31.041968] [ 31.042113] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.042755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.043405] Call Trace: [ 31.043611] [ 31.043798] dump_stack_lvl+0x91/0xf0 [ 31.044122] print_report+0xcc/0x620 [ 31.044436] ? __virt_addr_valid+0x102/0x340 [ 31.044884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045785] kasan_report+0xbe/0xf0 [ 31.046100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046528] vma_interval_tree_remove+0xc75/0xec0 [ 31.046936] vma_prepare+0xc54/0x11a0 [ 31.047268] __split_vma+0x5af/0x950 [ 31.047580] ? __pfx___split_vma+0x10/0x10 [ 31.047917] ? find_held_lock+0x2c/0x110 [ 31.048257] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.048676] ? lock_is_held_type+0x9f/0x120 [ 31.049031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.049422] ? mtree_range_walk+0x632/0x900 [ 31.049785] ? mas_walk+0x5c7/0x7c0 [ 31.050082] do_vmi_munmap+0x1f1/0x2b0 [ 31.050402] mmap_region+0x1f9/0x2660 [ 31.050755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.051074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.051535] ? __pfx_lock_acquire+0x10/0x10 [ 31.051878] ? __pfx_mmap_region+0x10/0x10 [ 31.052215] ? security_mmap_addr+0x7d/0xa0 [ 31.052572] ? get_unmapped_area+0x1f5/0x3f0 [ 31.052937] do_mmap+0x854/0xf00 [ 31.053218] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.053547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.053909] ksys_mmap_pgoff+0x3af/0x500 [ 31.054224] do_syscall_64+0x3f/0x90 [ 31.054557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.054993] RIP: 0033:0x7f11c6e84d82 [ 31.055282] 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 [ 31.056678] RSP: 002b:00007ffd8d55d0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.057251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11c6e84d82 [ 31.057814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11c62be000 [ 31.058350] RBP: 00007f11c62be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.058974] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f602cd980 [ 31.059559] R13: 00007ffd8d55d110 R14: 00007ffd8d55d140 R15: 00007ffd8d55d4a0 [ 31.060103] [ 31.060294] [ 31.060428] Allocated by task 214: [ 31.060708] kasan_save_stack+0x22/0x50 [ 31.061026] kasan_set_track+0x25/0x30 [ 31.061357] __kasan_slab_alloc+0x59/0x70 [ 31.061734] kmem_cache_alloc+0x16b/0x370 [ 31.062061] vm_area_dup+0x20/0x160 [ 31.062378] __split_vma+0x170/0x950 [ 31.062709] split_vma+0xc6/0x110 [ 31.062991] mprotect_fixup+0x8d2/0xb30 [ 31.063311] do_mprotect_pkey+0x87e/0xd40 [ 31.063652] __x64_sys_mprotect+0x78/0xc0 [ 31.063982] do_syscall_64+0x3f/0x90 [ 31.064304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064732] [ 31.064870] Freed by task 214: [ 31.065126] kasan_save_stack+0x22/0x50 [ 31.065458] kasan_set_track+0x25/0x30 [ 31.065782] kasan_save_free_info+0x2b/0x50 [ 31.066123] __kasan_slab_free+0x10a/0x190 [ 31.066500] kmem_cache_free+0x10d/0x4d0 [ 31.066878] rcu_core+0x8c8/0x2860 [ 31.067168] __do_softirq+0x1b7/0x7d4 [ 31.067501] [ 31.067641] Last potentially related work creation: [ 31.068007] kasan_save_stack+0x22/0x50 [ 31.068329] __kasan_record_aux_stack+0x8e/0xa0 [ 31.068748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.069164] remove_vma+0x139/0x170 [ 31.069488] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.069828] do_vmi_munmap+0x1f1/0x2b0 [ 31.070125] __vm_munmap+0x138/0x3a0 [ 31.070425] __x64_sys_munmap+0x59/0x80 [ 31.070780] do_syscall_64+0x3f/0x90 [ 31.071093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.071533] [ 31.071687] The buggy address belongs to the object at ffff888016881000 [ 31.071687] which belongs to the cache vm_area_struct of size 168 [ 31.072666] The buggy address is located 88 bytes inside of [ 31.072666] freed 168-byte region [ffff888016881000, ffff8880168810a8) [ 31.073599] [ 31.073745] The buggy address belongs to the physical page: [ 31.074173] page:00000000a89452b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16881 [ 31.074922] memcg:ffff88800f2b7301 [ 31.075193] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.075613] page_type: 0xffffffff() [ 31.075886] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383f40 dead000000000008 [ 31.076476] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2b7301 [ 31.077093] page dumped because: kasan: bad access detected [ 31.077517] [ 31.077651] Memory state around the buggy address: [ 31.078021] ffff888016880f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.078640] ffff888016880f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.079210] >ffff888016881000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.079790] ^ [ 31.080244] ffff888016881080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.080776] ffff888016881100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.081300] ================================================================== [ 31.082068] Disabling lock debugging due to kernel taint [ 33.092597] BUG: Bad rss-counter state mm:00000000c0d69cb8 type:MM_FILEPAGES val:33 [ 33.093291] BUG: Bad rss-counter state mm:00000000c0d69cb8 type:MM_ANONPAGES val:22 [ 33.536046] BUG: Bad rss-counter state mm:00000000d3362c0c type:MM_FILEPAGES val:33 [ 33.536851] BUG: Bad rss-counter state mm:00000000d3362c0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65032' (ECDSA) to the list of known hosts. 2023/06/21 09:54:28 fuzzer started 2023/06/21 09:54:28 dialing manager at localhost:36067 2023/06/21 09:54:28 checking machine... 2023/06/21 09:54:28 checking revisions... [ 34.029166] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:54:28 testing simple program... [ 34.068975] cgroup: Unknown subsys name 'net' [ 34.099686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:54:28 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=00007f0660235000 CR3=000000000e524000 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=2038323a34353a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34353a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fc80000 RSI=ffffffff81143193 RDI=0000000000000007 RBP=000000000cb63300 RSP=ffff888016fdfb70 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000080000 R14=0000000000000000 R15=ffff8880094af3c0 RIP=ffffffff811431d8 RFL=00000293 [--S-A-C] 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 00007f0660366900 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=00007f066091d618 CR3=0000000015b36000 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=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