syzkaller login: [ 36.128247] BUG: Bad rss-counter state mm:0000000051917252 type:MM_FILEPAGES val:33 [ 36.129501] BUG: Bad rss-counter state mm:0000000051917252 type:MM_ANONPAGES val:22 [ 36.301953] ================================================================== [ 36.302893] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.303844] Read of size 8 at addr ffff88800f6754e0 by task sshd/219 [ 36.304743] [ 36.304966] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.305851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.306855] Call Trace: [ 36.307180] [ 36.307473] dump_stack_lvl+0x91/0xf0 [ 36.307985] print_report+0xcc/0x620 [ 36.308497] ? __virt_addr_valid+0x102/0x340 [ 36.309071] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.309711] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.310340] kasan_report+0xbe/0xf0 [ 36.310831] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.311468] vma_interval_tree_remove+0xc75/0xec0 [ 36.312087] vma_prepare+0xc54/0x11a0 [ 36.312586] __split_vma+0x5af/0x950 [ 36.313082] ? __pfx___split_vma+0x10/0x10 [ 36.313637] ? find_held_lock+0x2c/0x110 [ 36.314177] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.314767] ? lock_is_held_type+0x9f/0x120 [ 36.315316] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.315944] ? mtree_range_walk+0x632/0x900 [ 36.316515] ? mas_walk+0x5c7/0x7c0 [ 36.317003] do_vmi_munmap+0x1f1/0x2b0 [ 36.317521] mmap_region+0x1f9/0x2660 [ 36.318015] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.318550] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.319268] ? __pfx_lock_acquire+0x10/0x10 [ 36.319833] ? __pfx_mmap_region+0x10/0x10 [ 36.320364] ? security_mmap_addr+0x7d/0xa0 [ 36.320939] ? get_unmapped_area+0x1f5/0x3f0 [ 36.321506] do_mmap+0x854/0xf00 [ 36.321954] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.322454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.323026] ksys_mmap_pgoff+0x3af/0x500 [ 36.323559] do_syscall_64+0x3f/0x90 [ 36.324040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.324722] RIP: 0033:0x7f6987064d82 [ 36.325191] 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 [ 36.327343] RSP: 002b:00007ffd1df1ecc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.328411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6987064d82 [ 36.329565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f698649e000 [ 36.330613] RBP: 00007f698649e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.331725] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc95c32ec0 [ 36.332818] R13: 00007ffd1df1ece0 R14: 00007ffd1df1ed10 R15: 00007ffd1df1f070 [ 36.333747] [ 36.334125] [ 36.334393] Allocated by task 212: [ 36.334890] kasan_save_stack+0x22/0x50 [ 36.335393] kasan_set_track+0x25/0x30 [ 36.335901] __kasan_slab_alloc+0x59/0x70 [ 36.336421] kmem_cache_alloc+0x16b/0x370 [ 36.336979] vm_area_dup+0x20/0x160 [ 36.337430] __split_vma+0x170/0x950 [ 36.337913] split_vma+0xc6/0x110 [ 36.338358] mprotect_fixup+0x8d2/0xb30 [ 36.338886] do_mprotect_pkey+0x87e/0xd40 [ 36.339419] __x64_sys_mprotect+0x78/0xc0 [ 36.339958] do_syscall_64+0x3f/0x90 [ 36.340444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.341144] [ 36.341360] Freed by task 212: [ 36.341773] kasan_save_stack+0x22/0x50 [ 36.342274] kasan_set_track+0x25/0x30 [ 36.342786] kasan_save_free_info+0x2b/0x50 [ 36.343321] __kasan_slab_free+0x10a/0x190 [ 36.343866] kmem_cache_free+0x10d/0x4d0 [ 36.344377] rcu_core+0x8c8/0x2860 [ 36.344843] __do_softirq+0x1b7/0x7d4 [ 36.345323] [ 36.345561] Last potentially related work creation: [ 36.346152] kasan_save_stack+0x22/0x50 [ 36.346669] __kasan_record_aux_stack+0x8e/0xa0 [ 36.347246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.347916] remove_vma+0x139/0x170 [ 36.348371] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.348968] do_vmi_munmap+0x1f1/0x2b0 [ 36.349458] __vm_munmap+0x138/0x3a0 [ 36.349939] __x64_sys_munmap+0x59/0x80 [ 36.350445] do_syscall_64+0x3f/0x90 [ 36.350959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.351617] [ 36.351842] The buggy address belongs to the object at ffff88800f675488 [ 36.351842] which belongs to the cache vm_area_struct of size 168 [ 36.353370] The buggy address is located 88 bytes inside of [ 36.353370] freed 168-byte region [ffff88800f675488, ffff88800f675530) [ 36.354866] [ 36.355082] The buggy address belongs to the physical page: [ 36.355767] page:000000001f03a03d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf675 [ 36.356888] memcg:ffff88800e413a01 [ 36.357322] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.358056] page_type: 0xffffffff() [ 36.358530] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.359464] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e413a01 [ 36.360393] page dumped because: kasan: bad access detected [ 36.361076] [ 36.361292] Memory state around the buggy address: [ 36.361898] ffff88800f675380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.362792] ffff88800f675400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.363667] >ffff88800f675480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.364549] ^ [ 36.365315] ffff88800f675500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 36.366195] ffff88800f675580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.367073] ================================================================== [ 36.368062] Disabling lock debugging due to kernel taint [ 38.885045] BUG: Bad rss-counter state mm:00000000c9a8f45e type:MM_FILEPAGES val:33 [ 38.886361] BUG: Bad rss-counter state mm:00000000c9a8f45e type:MM_ANONPAGES val:22 [ 39.258915] BUG: Bad rss-counter state mm:00000000749ff976 type:MM_FILEPAGES val:33 [ 39.259681] BUG: Bad rss-counter state mm:00000000749ff976 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41719' (ECDSA) to the list of known hosts. 2023/06/19 12:41:35 fuzzer started 2023/06/19 12:41:35 dialing manager at localhost:44161 2023/06/19 12:41:35 checking machine... 2023/06/19 12:41:35 checking revisions... [ 39.972239] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:41:35 testing simple program... [ 40.023716] cgroup: Unknown subsys name 'net' [ 40.080086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:41:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055e7bf21f360 RCX=0000000000000000 RDX=00000000ffffffff RSI=000055e7bf21f3a8 RDI=000055e7bf21f360 RBP=0000000000000000 RSP=00007ffdb1532dc0 R8 =0000000064904cfe R9 =00007ffdb15b5080 R10=00007ffdb15b5080 R11=0000000000000202 R12=0000000000000058 R13=00007f7a1a0604ed R14=00007f7a1a0604e3 R15=0000000000000000 RIP=00007f7a19feaf52 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7a19473900 00000000 00000000 GS =0000 0000000000000000 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=00007f9b5b16e650 CR3=000000000d7ba000 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=be7d47d2e3d05881e0407656f2b2ad33 XMM02=000000000011efb8ec2efd57dc4c00df XMM03=00000000001251e0e145a2d300299835 XMM04=681f587ddafad9c100000000000ae988 XMM05=19e9129bd510f2350000000000134ac0 XMM06=425335cb9994bfa20000000000133c98 XMM07=e042d86d42eb936e00000000001254b8 XMM08=e145a2d300299835000000000011f018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd8960e3b8 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=00007f2fe4df1510000055c7865fb790 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