syzkaller login: [ 38.740936] BUG: Bad rss-counter state mm:00000000a265a8c0 type:MM_FILEPAGES val:33 [ 38.742449] BUG: Bad rss-counter state mm:00000000a265a8c0 type:MM_ANONPAGES val:22 [ 38.917106] ================================================================== [ 38.918086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.919093] Read of size 8 at addr ffff888018ff2b38 by task sshd/220 [ 38.920046] [ 38.920278] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.921227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.922295] Call Trace: [ 38.922643] [ 38.922945] dump_stack_lvl+0x91/0xf0 [ 38.923467] print_report+0xcc/0x620 [ 38.923981] ? __virt_addr_valid+0x102/0x340 [ 38.924578] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925245] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925928] kasan_report+0xbe/0xf0 [ 38.926451] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.927138] vma_interval_tree_remove+0xc75/0xec0 [ 38.927806] vma_prepare+0xc54/0x11a0 [ 38.928336] __split_vma+0x5af/0x950 [ 38.928873] ? __pfx___split_vma+0x10/0x10 [ 38.929456] ? find_held_lock+0x2c/0x110 [ 38.930033] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.930659] ? lock_is_held_type+0x9f/0x120 [ 38.931265] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.931934] ? mtree_range_walk+0x632/0x900 [ 38.932571] ? mas_walk+0x5c7/0x7c0 [ 38.933103] do_vmi_munmap+0x1f1/0x2b0 [ 38.933647] mmap_region+0x1f9/0x2660 [ 38.934178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.934745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.935550] ? __pfx_lock_acquire+0x10/0x10 [ 38.936135] ? __pfx_mmap_region+0x10/0x10 [ 38.936735] ? security_mmap_addr+0x7d/0xa0 [ 38.937323] ? get_unmapped_area+0x1f5/0x3f0 [ 38.937930] do_mmap+0x854/0xf00 [ 38.938410] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.938963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.939592] ksys_mmap_pgoff+0x3af/0x500 [ 38.940157] do_syscall_64+0x3f/0x90 [ 38.940717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941437] RIP: 0033:0x7f5a6d234d82 [ 38.941935] 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 [ 38.944358] RSP: 002b:00007ffc27c06a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.945387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a6d234d82 [ 38.946358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a6c66e000 [ 38.947339] RBP: 00007f5a6c66e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.948298] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603d26a2ec0 [ 38.949256] R13: 00007ffc27c06a40 R14: 00007ffc27c06a70 R15: 00007ffc27c06dd0 [ 38.950210] [ 38.950533] [ 38.950771] Allocated by task 212: [ 38.951248] kasan_save_stack+0x22/0x50 [ 38.951809] kasan_set_track+0x25/0x30 [ 38.952356] __kasan_slab_alloc+0x59/0x70 [ 38.952948] kmem_cache_alloc+0x16b/0x370 [ 38.953527] vm_area_dup+0x20/0x160 [ 38.954028] __split_vma+0x170/0x950 [ 38.954541] split_vma+0xc6/0x110 [ 38.955025] mprotect_fixup+0x8d2/0xb30 [ 38.955581] do_mprotect_pkey+0x87e/0xd40 [ 38.956158] __x64_sys_mprotect+0x78/0xc0 [ 38.956746] do_syscall_64+0x3f/0x90 [ 38.957270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.957981] [ 38.958218] Freed by task 212: [ 38.958650] kasan_save_stack+0x22/0x50 [ 38.959208] kasan_set_track+0x25/0x30 [ 38.959754] kasan_save_free_info+0x2b/0x50 [ 38.960342] __kasan_slab_free+0x10a/0x190 [ 38.960957] kmem_cache_free+0x10d/0x4d0 [ 38.961524] rcu_core+0x8c8/0x2860 [ 38.962017] __do_softirq+0x1b7/0x7d4 [ 38.962546] [ 38.962784] Last potentially related work creation: [ 38.963431] kasan_save_stack+0x22/0x50 [ 38.963991] __kasan_record_aux_stack+0x8e/0xa0 [ 38.964630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.965339] remove_vma+0x139/0x170 [ 38.965835] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966449] do_vmi_munmap+0x1f1/0x2b0 [ 38.966991] __vm_munmap+0x138/0x3a0 [ 38.967504] __x64_sys_munmap+0x59/0x80 [ 38.968054] do_syscall_64+0x3f/0x90 [ 38.968596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969304] [ 38.969543] The buggy address belongs to the object at ffff888018ff2ae0 [ 38.969543] which belongs to the cache vm_area_struct of size 168 [ 38.971177] The buggy address is located 88 bytes inside of [ 38.971177] freed 168-byte region [ffff888018ff2ae0, ffff888018ff2b88) [ 38.972746] [ 38.972983] The buggy address belongs to the physical page: [ 38.973716] page:00000000dab803d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ff2 [ 38.974922] memcg:ffff88801a641c01 [ 38.975389] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.976106] page_type: 0xffffffff() [ 38.976621] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.977642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a641c01 [ 38.978647] page dumped because: kasan: bad access detected [ 38.979379] [ 38.979616] Memory state around the buggy address: [ 38.980260] ffff888018ff2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.981219] ffff888018ff2a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.982172] >ffff888018ff2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.983117] ^ [ 38.983798] ffff888018ff2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.984764] ffff888018ff2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.985709] ================================================================== [ 38.986768] Disabling lock debugging due to kernel taint [ 40.931663] BUG: Bad rss-counter state mm:0000000049222221 type:MM_FILEPAGES val:33 [ 40.932704] BUG: Bad rss-counter state mm:0000000049222221 type:MM_ANONPAGES val:22 [ 41.399067] BUG: Bad rss-counter state mm:000000008d2ee8ca type:MM_FILEPAGES val:33 [ 41.400054] BUG: Bad rss-counter state mm:000000008d2ee8ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11700' (ECDSA) to the list of known hosts. 2023/06/20 15:18:14 fuzzer started 2023/06/20 15:18:14 dialing manager at localhost:36067 2023/06/20 15:18:14 checking machine... 2023/06/20 15:18:14 checking revisions... [ 42.165181] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:18:15 testing simple program... [ 42.218317] cgroup: Unknown subsys name 'net' [ 42.271319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:18:14 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=00007f14ff8caa70 CR3=0000000014206000 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=8ec26ea31dc286b53d4ad100abbe6cca XMM02=000000000011b418ec2efd57dc4c00df XMM03=0000000000121dd89f6f8a9f60209262 XMM04=f4140fd7d445225e00000000000ae988 XMM05=19e9129bd510f23500000000001319e8 XMM06=4fda316b135da52b0000000000131870 XMM07=e042d86d42eb936e00000000001220b0 XMM08=9f6f8a9f60209262000000000011b478 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110037b7f8f RSP=ffff88801bdbfc58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff8183d669 R14=0000000000000010 R15=0000000000000001 RIP=ffffffff8135b935 RFL=00000247 [---Z-PC] 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 00007f8559c0b900 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=00007ffd96503000 CR3=000000000e126000 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