syzkaller login: [ 31.946185] BUG: Bad rss-counter state mm:000000003a2f3699 type:MM_FILEPAGES val:33 [ 31.947463] BUG: Bad rss-counter state mm:000000003a2f3699 type:MM_ANONPAGES val:22 [ 31.997362] ================================================================== [ 31.998328] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.999319] Read of size 8 at addr ffff88801a2c8880 by task sshd/221 [ 32.000123] [ 32.000351] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.001256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.002290] Call Trace: [ 32.002620] [ 32.002917] dump_stack_lvl+0x91/0xf0 [ 32.003429] print_report+0xcc/0x620 [ 32.003934] ? __virt_addr_valid+0x102/0x340 [ 32.004509] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.005153] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.005788] kasan_report+0xbe/0xf0 [ 32.006307] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.006955] vma_interval_tree_remove+0xc75/0xec0 [ 32.007590] vma_prepare+0xc54/0x11a0 [ 32.008090] __split_vma+0x5af/0x950 [ 32.008584] ? __pfx___split_vma+0x10/0x10 [ 32.009136] ? find_held_lock+0x2c/0x110 [ 32.009684] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.010288] ? lock_is_held_type+0x9f/0x120 [ 32.010853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.011495] ? mtree_range_walk+0x632/0x900 [ 32.012077] ? mas_walk+0x5c7/0x7c0 [ 32.012571] do_vmi_munmap+0x1f1/0x2b0 [ 32.013080] mmap_region+0x1f9/0x2660 [ 32.013588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.014143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.014904] ? __pfx_lock_acquire+0x10/0x10 [ 32.015462] ? __pfx_mmap_region+0x10/0x10 [ 32.016015] ? security_mmap_addr+0x7d/0xa0 [ 32.016571] ? get_unmapped_area+0x1f5/0x3f0 [ 32.017148] do_mmap+0x854/0xf00 [ 32.017606] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.018137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.018719] ksys_mmap_pgoff+0x3af/0x500 [ 32.019254] do_syscall_64+0x3f/0x90 [ 32.019752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.020441] RIP: 0033:0x7fade9e89d82 [ 32.020921] 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 [ 32.023357] RSP: 002b:00007ffcd182d478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.024319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fade9e89d82 [ 32.025221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fade92c3000 [ 32.026109] RBP: 00007fade92c3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.027011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055865d952ec0 [ 32.027910] R13: 00007ffcd182d490 R14: 00007ffcd182d4c0 R15: 00007ffcd182d820 [ 32.028817] [ 32.029123] [ 32.029353] Allocated by task 214: [ 32.029799] kasan_save_stack+0x22/0x50 [ 32.030340] kasan_set_track+0x25/0x30 [ 32.030858] __kasan_slab_alloc+0x59/0x70 [ 32.031402] kmem_cache_alloc+0x16b/0x370 [ 32.031947] vm_area_dup+0x20/0x160 [ 32.032422] __split_vma+0x170/0x950 [ 32.032909] split_vma+0xc6/0x110 [ 32.033370] mprotect_fixup+0x8d2/0xb30 [ 32.033896] do_mprotect_pkey+0x87e/0xd40 [ 32.034458] __x64_sys_mprotect+0x78/0xc0 [ 32.035005] do_syscall_64+0x3f/0x90 [ 32.035501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.036177] [ 32.036398] Freed by task 19: [ 32.036806] kasan_save_stack+0x22/0x50 [ 32.037335] kasan_set_track+0x25/0x30 [ 32.037848] kasan_save_free_info+0x2b/0x50 [ 32.038418] __kasan_slab_free+0x10a/0x190 [ 32.038982] kmem_cache_free+0x10d/0x4d0 [ 32.039516] rcu_core+0x8c8/0x2860 [ 32.039986] __do_softirq+0x1b7/0x7d4 [ 32.040501] [ 32.040727] Last potentially related work creation: [ 32.041347] kasan_save_stack+0x22/0x50 [ 32.041885] __kasan_record_aux_stack+0x8e/0xa0 [ 32.042497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.043179] remove_vma+0x139/0x170 [ 32.043649] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.044236] do_vmi_munmap+0x1f1/0x2b0 [ 32.044745] __vm_munmap+0x138/0x3a0 [ 32.045234] __x64_sys_munmap+0x59/0x80 [ 32.045766] do_syscall_64+0x3f/0x90 [ 32.046294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.046975] [ 32.047205] The buggy address belongs to the object at ffff88801a2c8828 [ 32.047205] which belongs to the cache vm_area_struct of size 168 [ 32.048781] The buggy address is located 88 bytes inside of [ 32.048781] freed 168-byte region [ffff88801a2c8828, ffff88801a2c88d0) [ 32.050278] [ 32.050509] The buggy address belongs to the physical page: [ 32.051214] page:00000000b887304c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2c8 [ 32.052366] memcg:ffff88800dbc9b01 [ 32.052825] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.053502] page_type: 0xffffffff() [ 32.053983] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.054951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbc9b01 [ 32.055914] page dumped because: kasan: bad access detected [ 32.056615] [ 32.056841] Memory state around the buggy address: [ 32.057454] ffff88801a2c8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.058369] ffff88801a2c8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.059278] >ffff88801a2c8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.060174] ^ [ 32.060602] ffff88801a2c8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.061521] ffff88801a2c8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.062436] ================================================================== [ 32.063680] Disabling lock debugging due to kernel taint [ 34.321764] BUG: Bad rss-counter state mm:000000007ac5b7ae type:MM_FILEPAGES val:33 [ 34.322887] BUG: Bad rss-counter state mm:000000007ac5b7ae type:MM_ANONPAGES val:22 [ 34.833642] BUG: Bad rss-counter state mm:000000005c4fbf6e type:MM_FILEPAGES val:33 [ 34.834838] BUG: Bad rss-counter state mm:000000005c4fbf6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23705' (ECDSA) to the list of known hosts. 2023/06/20 15:19:01 fuzzer started 2023/06/20 15:19:02 dialing manager at localhost:36067 2023/06/20 15:19:02 checking machine... 2023/06/20 15:19:02 checking revisions... [ 35.502339] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:19:02 testing simple program... [ 35.561379] cgroup: Unknown subsys name 'net' [ 35.631599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:19:01 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=00007f51074680a0 CR3=000000000caf8000 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=645178ad639b708292447003dd7211f4 XMM02=2c67c8bc2e329bc3000000000011ad78 XMM03=fb795ef6d657705600000000001222f0 XMM04=bf2ebe1524f6482c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132148 XMM06=6f0c74da4e0dd9780000000000130fb0 XMM07=e042d86d42eb936e0000000000122570 XMM08=de298a7a802f1406000000000011add8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff88800dd903f4 RBP=0000000000000000 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800dae3398 RIP=ffffffff814c0871 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 00007fabe82aa900 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=00007ffe46d9c000 CR3=000000000fde4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000