syzkaller login: [ 33.814279] BUG: Bad rss-counter state mm:00000000a9274693 type:MM_FILEPAGES val:33 [ 33.816273] BUG: Bad rss-counter state mm:00000000a9274693 type:MM_ANONPAGES val:22 [ 33.975284] ================================================================== [ 33.976367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.977623] Read of size 8 at addr ffff88800e57a880 by task sshd/221 [ 33.978448] [ 33.978676] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.979548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.980572] Call Trace: [ 33.980902] [ 33.981190] dump_stack_lvl+0x91/0xf0 [ 33.981708] print_report+0xcc/0x620 [ 33.982206] ? __virt_addr_valid+0x102/0x340 [ 33.982781] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.983422] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.984053] kasan_report+0xbe/0xf0 [ 33.984533] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.985164] vma_interval_tree_remove+0xc75/0xec0 [ 33.985800] vma_prepare+0xc54/0x11a0 [ 33.986297] __split_vma+0x5af/0x950 [ 33.986778] ? __pfx___split_vma+0x10/0x10 [ 33.987314] ? find_held_lock+0x2c/0x110 [ 33.987841] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.988420] ? lock_is_held_type+0x9f/0x120 [ 33.988960] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.989572] ? mtree_range_walk+0x632/0x900 [ 33.990147] ? mas_walk+0x5c7/0x7c0 [ 33.990627] do_vmi_munmap+0x1f1/0x2b0 [ 33.991128] mmap_region+0x1f9/0x2660 [ 33.991621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.992148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.992879] ? __pfx_lock_acquire+0x10/0x10 [ 33.993424] ? __pfx_mmap_region+0x10/0x10 [ 33.993965] ? security_mmap_addr+0x7d/0xa0 [ 33.994500] ? get_unmapped_area+0x1f5/0x3f0 [ 33.995059] do_mmap+0x854/0xf00 [ 33.995505] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.996005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.996571] ksys_mmap_pgoff+0x3af/0x500 [ 33.997087] do_syscall_64+0x3f/0x90 [ 33.997579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.998258] RIP: 0033:0x7f9624707d82 [ 33.998729] 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 [ 34.000883] RSP: 002b:00007fff0ff30f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.001804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9624707d82 [ 34.002671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9623b41000 [ 34.003547] RBP: 00007f9623b41000 R08: 0000000000000009 R09: 0000000000001000 [ 34.004414] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b8bde4ec0 [ 34.005285] R13: 00007fff0ff30f20 R14: 00007fff0ff30f50 R15: 00007fff0ff312b0 [ 34.006162] [ 34.006464] [ 34.006683] Allocated by task 214: [ 34.007129] kasan_save_stack+0x22/0x50 [ 34.007647] kasan_set_track+0x25/0x30 [ 34.008145] __kasan_slab_alloc+0x59/0x70 [ 34.008679] kmem_cache_alloc+0x16b/0x370 [ 34.009210] vm_area_dup+0x20/0x160 [ 34.009688] __split_vma+0x170/0x950 [ 34.010163] split_vma+0xc6/0x110 [ 34.010615] mprotect_fixup+0x8d2/0xb30 [ 34.011127] do_mprotect_pkey+0x87e/0xd40 [ 34.011655] __x64_sys_mprotect+0x78/0xc0 [ 34.012188] do_syscall_64+0x3f/0x90 [ 34.012672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.013324] [ 34.013547] Freed by task 203: [ 34.013966] kasan_save_stack+0x22/0x50 [ 34.014488] kasan_set_track+0x25/0x30 [ 34.014990] kasan_save_free_info+0x2b/0x50 [ 34.015536] __kasan_slab_free+0x10a/0x190 [ 34.016075] kmem_cache_free+0x10d/0x4d0 [ 34.016588] rcu_core+0x8c8/0x2860 [ 34.017047] __do_softirq+0x1b7/0x7d4 [ 34.017534] [ 34.017767] Last potentially related work creation: [ 34.018367] kasan_save_stack+0x22/0x50 [ 34.018885] __kasan_record_aux_stack+0x8e/0xa0 [ 34.019481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.020144] remove_vma+0x139/0x170 [ 34.020602] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.021166] do_vmi_munmap+0x1f1/0x2b0 [ 34.021667] __vm_munmap+0x138/0x3a0 [ 34.022148] __x64_sys_munmap+0x59/0x80 [ 34.022659] do_syscall_64+0x3f/0x90 [ 34.023146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.023790] [ 34.024008] The buggy address belongs to the object at ffff88800e57a828 [ 34.024008] which belongs to the cache vm_area_struct of size 168 [ 34.025499] The buggy address is located 88 bytes inside of [ 34.025499] freed 168-byte region [ffff88800e57a828, ffff88800e57a8d0) [ 34.026961] [ 34.027177] The buggy address belongs to the physical page: [ 34.027840] page:00000000a2852d73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe57a [ 34.028929] memcg:ffff88800f400101 [ 34.029365] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.030028] page_type: 0xffffffff() [ 34.030483] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.031407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f400101 [ 34.032315] page dumped because: kasan: bad access detected [ 34.032992] [ 34.033208] Memory state around the buggy address: [ 34.033798] ffff88800e57a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.034669] ffff88800e57a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.035540] >ffff88800e57a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.036399] ^ [ 34.036814] ffff88800e57a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.037674] ffff88800e57a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.038525] ================================================================== [ 34.039579] Disabling lock debugging due to kernel taint [ 36.028525] BUG: Bad rss-counter state mm:0000000032ebd9aa type:MM_FILEPAGES val:33 [ 36.029649] BUG: Bad rss-counter state mm:0000000032ebd9aa type:MM_ANONPAGES val:22 [ 36.485229] BUG: Bad rss-counter state mm:0000000034b70db1 type:MM_FILEPAGES val:33 [ 36.486732] BUG: Bad rss-counter state mm:0000000034b70db1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55504' (ECDSA) to the list of known hosts. 2023/06/19 14:44:19 fuzzer started 2023/06/19 14:44:19 dialing manager at localhost:44161 2023/06/19 14:44:19 checking machine... 2023/06/19 14:44:19 checking revisions... [ 37.244903] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:44:19 testing simple program... [ 37.297131] cgroup: Unknown subsys name 'net' [ 37.345589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:16 Registers: info registers vcpu 0 RAX=ffff88800d643680 RBX=ffff8880147d75e0 RCX=ffffffff81132ffe RDX=ffff8880147d74f8 RSI=0000000000000000 RDI=ffff8880147d75b8 RBP=ffff88800d643680 RSP=ffff8880147d74f8 R8 =0000000000000400 R9 =0000000000000000 R10=ffff8880147d7548 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880147d7570 R14=ffff88800d643680 R15=ffff8880147d7548 RIP=ffffffff81133008 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 00007f46959de900 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=00007f4d1d0b8650 CR3=000000000f760000 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=50d53590aab19daa254d0e209c8aeb35 XMM02=eff9b2d0a8fce9cb000000000011ce98 XMM03=2c67c8bc2e329bc3000000000011cfc0 XMM04=8e419687040f81ab00000000000ae988 XMM05=3fb929efdf06232e00000000001350a8 XMM06=e4cb8bb95a7664b60000000000133f40 XMM07=fb795ef6d65770560000000000124460 XMM08=2c67c8bc2e329bc3000000000011cfc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff837264db RDX=ffff888016efd1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff8880165677b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=ffffffff87f96af0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c07e4 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 00007f4d1cb03900 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=00007f4d1d0ba618 CR3=00000000168e2000 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