syzkaller login: [ 30.966675] BUG: Bad rss-counter state mm:00000000832c1c70 type:MM_FILEPAGES val:33 [ 30.967969] BUG: Bad rss-counter state mm:00000000832c1c70 type:MM_ANONPAGES val:22 [ 31.010718] ================================================================== [ 31.011868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.012855] Read of size 8 at addr ffff88800fbc9140 by task sshd/221 [ 31.013675] [ 31.013891] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.014796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.015836] Call Trace: [ 31.016192] [ 31.016489] dump_stack_lvl+0x91/0xf0 [ 31.016993] print_report+0xcc/0x620 [ 31.017511] ? __virt_addr_valid+0x102/0x340 [ 31.018075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.018710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019355] kasan_report+0xbe/0xf0 [ 31.019862] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020544] vma_interval_tree_remove+0xc75/0xec0 [ 31.021194] vma_prepare+0xc54/0x11a0 [ 31.021704] __split_vma+0x5af/0x950 [ 31.022220] ? __pfx___split_vma+0x10/0x10 [ 31.022786] ? find_held_lock+0x2c/0x110 [ 31.023351] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.023976] ? lock_is_held_type+0x9f/0x120 [ 31.024576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.025235] ? mtree_range_walk+0x632/0x900 [ 31.025820] ? mas_walk+0x5c7/0x7c0 [ 31.026333] do_vmi_munmap+0x1f1/0x2b0 [ 31.026858] mmap_region+0x1f9/0x2660 [ 31.027381] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.027952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.028739] ? __pfx_lock_acquire+0x10/0x10 [ 31.029380] ? __pfx_mmap_region+0x10/0x10 [ 31.029956] ? security_mmap_addr+0x7d/0xa0 [ 31.030541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.031138] do_mmap+0x854/0xf00 [ 31.031622] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.032163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.032781] ksys_mmap_pgoff+0x3af/0x500 [ 31.033353] do_syscall_64+0x3f/0x90 [ 31.033864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034587] RIP: 0033:0x7fa4f217dd82 [ 31.035076] 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 [ 31.037434] RSP: 002b:00007ffffc989558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.038410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4f217dd82 [ 31.039331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4f15b7000 [ 31.040254] RBP: 00007fa4f15b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.041162] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6a9d84b20 [ 31.042064] R13: 00007ffffc989570 R14: 00007ffffc9895a0 R15: 00007ffffc989900 [ 31.042982] [ 31.043318] [ 31.043555] Allocated by task 214: [ 31.044021] kasan_save_stack+0x22/0x50 [ 31.044576] kasan_set_track+0x25/0x30 [ 31.045103] __kasan_slab_alloc+0x59/0x70 [ 31.045676] kmem_cache_alloc+0x16b/0x370 [ 31.046237] vm_area_dup+0x20/0x160 [ 31.046714] __split_vma+0x170/0x950 [ 31.047233] split_vma+0xc6/0x110 [ 31.047718] mprotect_fixup+0x8d2/0xb30 [ 31.048267] do_mprotect_pkey+0x87e/0xd40 [ 31.048822] __x64_sys_mprotect+0x78/0xc0 [ 31.049388] do_syscall_64+0x3f/0x90 [ 31.049892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.050584] [ 31.050810] Freed by task 214: [ 31.051249] kasan_save_stack+0x22/0x50 [ 31.051804] kasan_set_track+0x25/0x30 [ 31.052338] kasan_save_free_info+0x2b/0x50 [ 31.052904] __kasan_slab_free+0x10a/0x190 [ 31.053488] kmem_cache_free+0x10d/0x4d0 [ 31.054028] rcu_core+0x8c8/0x2860 [ 31.054510] __do_softirq+0x1b7/0x7d4 [ 31.055021] [ 31.055274] Last potentially related work creation: [ 31.055908] kasan_save_stack+0x22/0x50 [ 31.056464] __kasan_record_aux_stack+0x8e/0xa0 [ 31.057074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.057769] remove_vma+0x139/0x170 [ 31.058258] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.058849] do_vmi_munmap+0x1f1/0x2b0 [ 31.059385] __vm_munmap+0x138/0x3a0 [ 31.059906] __x64_sys_munmap+0x59/0x80 [ 31.060446] do_syscall_64+0x3f/0x90 [ 31.060945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.061642] [ 31.061870] The buggy address belongs to the object at ffff88800fbc90e8 [ 31.061870] which belongs to the cache vm_area_struct of size 168 [ 31.063458] The buggy address is located 88 bytes inside of [ 31.063458] freed 168-byte region [ffff88800fbc90e8, ffff88800fbc9190) [ 31.064989] [ 31.065232] The buggy address belongs to the physical page: [ 31.065935] page:00000000f8fb4e1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbc9 [ 31.067100] memcg:ffff88800de72301 [ 31.067586] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.068295] page_type: 0xffffffff() [ 31.068767] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.069756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de72301 [ 31.070744] page dumped because: kasan: bad access detected [ 31.071460] [ 31.071701] Memory state around the buggy address: [ 31.072347] ffff88800fbc9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.073284] ffff88800fbc9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.074211] >ffff88800fbc9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.075116] ^ [ 31.075820] ffff88800fbc9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.076762] ffff88800fbc9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.077671] ================================================================== [ 31.078843] Disabling lock debugging due to kernel taint [ 32.956543] BUG: Bad rss-counter state mm:000000009fa5749c type:MM_FILEPAGES val:33 [ 32.957777] BUG: Bad rss-counter state mm:000000009fa5749c type:MM_ANONPAGES val:22 [ 33.432239] BUG: Bad rss-counter state mm:00000000f833f078 type:MM_FILEPAGES val:33 [ 33.433416] BUG: Bad rss-counter state mm:00000000f833f078 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25833' (ECDSA) to the list of known hosts. 2023/06/21 03:55:19 fuzzer started 2023/06/21 03:55:19 dialing manager at localhost:36067 2023/06/21 03:55:19 checking machine... 2023/06/21 03:55:19 checking revisions... [ 34.147472] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:55:19 testing simple program... [ 34.202819] cgroup: Unknown subsys name 'net' [ 34.272622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:55:19 Registers: info registers vcpu 0 RAX=1ffffffff0c0a37c RBX=ffffffff86051be0 RCX=ffffffff84536004 RDX=0000000000000000 RSI=ffffffff864b67f0 RDI=ffffffff86051bb4 RBP=ffffffff86051bb4 RSP=ffff88806ce099e0 R8 =ffffffff864b67f0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c7c R12=ffffffff86051c10 R13=ffffffff86051bb4 R14=ffffffff86051bb4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f7312830700 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=00007fda48d06110 CR3=0000000016a3e000 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=2038313a35353a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a35353a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180b2d4 RDX=00000000000080b2 RSI=00000000000080b2 RDI=ffffffff86509cb8 RBP=ffff88800ec0f578 RSP=ffff88800ec0f4b0 R8 =0000000000000000 R9 =ffff88800ec0f560 R10=0000000000038001 R11=000000000000fc0c R12=ffff88800ec0f580 R13=ffff88800ec0f568 R14=ffff88800ec0f561 R15=ffff88800ec0f520 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f962943a900 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=00007ffd92dac000 CR3=000000000c500000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000