syzkaller login: [ 32.168940] BUG: Bad rss-counter state mm:0000000060a08378 type:MM_FILEPAGES val:33 [ 32.171068] BUG: Bad rss-counter state mm:0000000060a08378 type:MM_ANONPAGES val:22 [ 32.346210] ================================================================== [ 32.347162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.348245] Read of size 8 at addr ffff88800d927058 by task sshd/221 [ 32.349169] [ 32.349451] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.350524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.351536] Call Trace: [ 32.351877] [ 32.352169] dump_stack_lvl+0x91/0xf0 [ 32.352679] print_report+0xcc/0x620 [ 32.353206] ? __virt_addr_valid+0x102/0x340 [ 32.353786] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.354421] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.355066] kasan_report+0xbe/0xf0 [ 32.355555] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.356194] vma_interval_tree_remove+0xc75/0xec0 [ 32.356835] vma_prepare+0xc54/0x11a0 [ 32.357338] __split_vma+0x5af/0x950 [ 32.357842] ? __pfx___split_vma+0x10/0x10 [ 32.358383] ? find_held_lock+0x2c/0x110 [ 32.358930] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.359508] ? lock_is_held_type+0x9f/0x120 [ 32.360071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.360713] ? mtree_range_walk+0x632/0x900 [ 32.361305] ? mas_walk+0x5c7/0x7c0 [ 32.361798] do_vmi_munmap+0x1f1/0x2b0 [ 32.362301] mmap_region+0x1f9/0x2660 [ 32.362812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.363339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.364089] ? __pfx_lock_acquire+0x10/0x10 [ 32.364633] ? __pfx_mmap_region+0x10/0x10 [ 32.365215] ? security_mmap_addr+0x7d/0xa0 [ 32.365770] ? get_unmapped_area+0x1f5/0x3f0 [ 32.366329] do_mmap+0x854/0xf00 [ 32.366798] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.367306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.367904] ksys_mmap_pgoff+0x3af/0x500 [ 32.368419] do_syscall_64+0x3f/0x90 [ 32.368930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.369602] RIP: 0033:0x7fe127be9d82 [ 32.370079] 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 [ 32.372273] RSP: 002b:00007ffdeb44d928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.373234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe127be9d82 [ 32.374127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe127023000 [ 32.375030] RBP: 00007fe127023000 R08: 0000000000000009 R09: 0000000000001000 [ 32.375927] R10: 0000000000000812 R11: 0000000000000206 R12: 000056465d848ec0 [ 32.376827] R13: 00007ffdeb44d940 R14: 00007ffdeb44d970 R15: 00007ffdeb44dcd0 [ 32.377747] [ 32.378060] [ 32.378279] Allocated by task 214: [ 32.378738] kasan_save_stack+0x22/0x50 [ 32.379260] kasan_set_track+0x25/0x30 [ 32.379783] __kasan_slab_alloc+0x59/0x70 [ 32.380348] kmem_cache_alloc+0x16b/0x370 [ 32.380919] vm_area_dup+0x20/0x160 [ 32.381397] __split_vma+0x170/0x950 [ 32.381894] split_vma+0xc6/0x110 [ 32.382351] mprotect_fixup+0x8d2/0xb30 [ 32.382884] do_mprotect_pkey+0x87e/0xd40 [ 32.383425] __x64_sys_mprotect+0x78/0xc0 [ 32.383979] do_syscall_64+0x3f/0x90 [ 32.384475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.385181] [ 32.385404] Freed by task 214: [ 32.385829] kasan_save_stack+0x22/0x50 [ 32.386356] kasan_set_track+0x25/0x30 [ 32.386886] kasan_save_free_info+0x2b/0x50 [ 32.387450] __kasan_slab_free+0x10a/0x190 [ 32.388025] kmem_cache_free+0x10d/0x4d0 [ 32.388565] rcu_core+0x8c8/0x2860 [ 32.389040] __do_softirq+0x1b7/0x7d4 [ 32.389545] [ 32.389781] Last potentially related work creation: [ 32.390380] kasan_save_stack+0x22/0x50 [ 32.390917] __kasan_record_aux_stack+0x8e/0xa0 [ 32.391519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.392207] remove_vma+0x139/0x170 [ 32.392688] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.393305] do_vmi_munmap+0x1f1/0x2b0 [ 32.393822] __vm_munmap+0x138/0x3a0 [ 32.394305] __x64_sys_munmap+0x59/0x80 [ 32.394824] do_syscall_64+0x3f/0x90 [ 32.395315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.395990] [ 32.396212] The buggy address belongs to the object at ffff88800d927000 [ 32.396212] which belongs to the cache vm_area_struct of size 168 [ 32.397783] The buggy address is located 88 bytes inside of [ 32.397783] freed 168-byte region [ffff88800d927000, ffff88800d9270a8) [ 32.399317] [ 32.399543] The buggy address belongs to the physical page: [ 32.400243] page:00000000f3485da6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd927 [ 32.401396] memcg:ffff88800f1be601 [ 32.401852] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.402521] page_type: 0xffffffff() [ 32.403007] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.404049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1be601 [ 32.405240] page dumped because: kasan: bad access detected [ 32.406142] [ 32.406436] Memory state around the buggy address: [ 32.407223] ffff88800d926f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.408376] ffff88800d926f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.409541] >ffff88800d927000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.410549] ^ [ 32.411331] ffff88800d927080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.412253] ffff88800d927100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.413180] ================================================================== [ 32.414246] Disabling lock debugging due to kernel taint [ 34.369060] BUG: Bad rss-counter state mm:000000007ac6f570 type:MM_FILEPAGES val:33 [ 34.370546] BUG: Bad rss-counter state mm:000000007ac6f570 type:MM_ANONPAGES val:22 [ 34.874731] BUG: Bad rss-counter state mm:00000000a0c4744a type:MM_FILEPAGES val:33 [ 34.875997] BUG: Bad rss-counter state mm:00000000a0c4744a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47798' (ECDSA) to the list of known hosts. 2023/06/19 18:38:11 fuzzer started 2023/06/19 18:38:11 dialing manager at localhost:44161 2023/06/19 18:38:11 checking machine... 2023/06/19 18:38:11 checking revisions... [ 35.600287] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:38:11 testing simple program... [ 35.646388] cgroup: Unknown subsys name 'net' [ 35.697329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:09 Registers: info registers vcpu 0 RAX=1ffffffff0c76f66 RBX=0000000000000001 RCX=ffffffff863b7b2e RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b7b30 RBP=ffff88800ca6f5a0 RSP=ffff88800ca6f4d8 R8 =ffffffff863b7b32 R9 =ffff88800ca6f588 R10=0000000000038001 R11=000000000008b93b R12=ffff88800ca6f5a8 R13=ffff88800ca6f590 R14=ffff88800ca6f9c0 R15=ffff88800ca6f548 RIP=ffffffff811311c7 RFL=00000216 [----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 00007f4071b93900 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=00007f407214a618 CR3=00000000166aa000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f1f0bf882d0 CR3=0000000019d84000 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=2030313a38333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38333a3831203931 XMM08=2f62696c2f223d6874617020303d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000