syzkaller login: [ 31.132396] BUG: Bad rss-counter state mm:000000004016ab29 type:MM_FILEPAGES val:33 [ 31.133982] BUG: Bad rss-counter state mm:000000004016ab29 type:MM_ANONPAGES val:22 [ 31.288001] ================================================================== [ 31.288932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.289871] Read of size 8 at addr ffff88800fb673f8 by task sshd/219 [ 31.290865] [ 31.291089] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.291953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.292946] Call Trace: [ 31.293271] [ 31.293559] dump_stack_lvl+0x91/0xf0 [ 31.294067] print_report+0xcc/0x620 [ 31.294552] ? __virt_addr_valid+0x102/0x340 [ 31.295102] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.295713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.296325] kasan_report+0xbe/0xf0 [ 31.296799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.297424] vma_interval_tree_remove+0xc75/0xec0 [ 31.298023] vma_prepare+0xc54/0x11a0 [ 31.298530] __split_vma+0x5af/0x950 [ 31.298998] ? __pfx___split_vma+0x10/0x10 [ 31.299533] ? find_held_lock+0x2c/0x110 [ 31.300050] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.300619] ? lock_is_held_type+0x9f/0x120 [ 31.301158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.301775] ? mtree_range_walk+0x632/0x900 [ 31.302348] ? mas_walk+0x5c7/0x7c0 [ 31.302824] do_vmi_munmap+0x1f1/0x2b0 [ 31.303317] mmap_region+0x1f9/0x2660 [ 31.303796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.304305] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.305015] ? __pfx_lock_acquire+0x10/0x10 [ 31.305566] ? __pfx_mmap_region+0x10/0x10 [ 31.306108] ? security_mmap_addr+0x7d/0xa0 [ 31.306648] ? get_unmapped_area+0x1f5/0x3f0 [ 31.307219] do_mmap+0x854/0xf00 [ 31.307670] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.308174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.308763] ksys_mmap_pgoff+0x3af/0x500 [ 31.309301] do_syscall_64+0x3f/0x90 [ 31.309779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310456] RIP: 0033:0x7f39537aad82 [ 31.310925] 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 [ 31.313117] RSP: 002b:00007ffd1f4bedd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.314018] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39537aad82 [ 31.314879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3952be4000 [ 31.315728] RBP: 00007f3952be4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.316627] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a48016f70 [ 31.317515] R13: 00007ffd1f4bedf0 R14: 00007ffd1f4bee20 R15: 00007ffd1f4bf180 [ 31.318429] [ 31.318719] [ 31.318936] Allocated by task 212: [ 31.319367] kasan_save_stack+0x22/0x50 [ 31.319878] kasan_set_track+0x25/0x30 [ 31.320405] __kasan_slab_alloc+0x59/0x70 [ 31.320965] kmem_cache_alloc+0x16b/0x370 [ 31.321508] vm_area_dup+0x20/0x160 [ 31.321984] __split_vma+0x170/0x950 [ 31.322477] split_vma+0xc6/0x110 [ 31.322928] mprotect_fixup+0x8d2/0xb30 [ 31.323448] do_mprotect_pkey+0x87e/0xd40 [ 31.323978] __x64_sys_mprotect+0x78/0xc0 [ 31.324510] do_syscall_64+0x3f/0x90 [ 31.324996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.325657] [ 31.325881] Freed by task 212: [ 31.326290] kasan_save_stack+0x22/0x50 [ 31.326802] kasan_set_track+0x25/0x30 [ 31.327310] kasan_save_free_info+0x2b/0x50 [ 31.327852] __kasan_slab_free+0x10a/0x190 [ 31.328386] kmem_cache_free+0x10d/0x4d0 [ 31.328907] rcu_core+0x8c8/0x2860 [ 31.329363] __do_softirq+0x1b7/0x7d4 [ 31.329854] [ 31.330080] Last potentially related work creation: [ 31.330675] kasan_save_stack+0x22/0x50 [ 31.331179] __kasan_record_aux_stack+0x8e/0xa0 [ 31.331757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.332509] remove_vma+0x139/0x170 [ 31.332972] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.333535] do_vmi_munmap+0x1f1/0x2b0 [ 31.334027] __vm_munmap+0x138/0x3a0 [ 31.334519] __x64_sys_munmap+0x59/0x80 [ 31.335016] do_syscall_64+0x3f/0x90 [ 31.335505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.336160] [ 31.336378] The buggy address belongs to the object at ffff88800fb673a0 [ 31.336378] which belongs to the cache vm_area_struct of size 168 [ 31.337877] The buggy address is located 88 bytes inside of [ 31.337877] freed 168-byte region [ffff88800fb673a0, ffff88800fb67448) [ 31.339318] [ 31.339534] The buggy address belongs to the physical page: [ 31.340200] page:00000000cd2cae2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb67 [ 31.341294] memcg:ffff88801679e801 [ 31.341810] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.342595] page_type: 0xffffffff() [ 31.343054] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.344011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801679e801 [ 31.344940] page dumped because: kasan: bad access detected [ 31.345608] [ 31.345831] Memory state around the buggy address: [ 31.346435] ffff88800fb67280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.347310] ffff88800fb67300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.348171] >ffff88800fb67380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.349041] ^ [ 31.349901] ffff88800fb67400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.350786] ffff88800fb67480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351664] ================================================================== [ 31.352651] Disabling lock debugging due to kernel taint [ 33.384953] BUG: Bad rss-counter state mm:000000001cedb79d type:MM_FILEPAGES val:33 [ 33.385848] BUG: Bad rss-counter state mm:000000001cedb79d type:MM_ANONPAGES val:22 [ 33.858600] BUG: Bad rss-counter state mm:0000000012e71d11 type:MM_FILEPAGES val:33 [ 33.860426] BUG: Bad rss-counter state mm:0000000012e71d11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10065' (ECDSA) to the list of known hosts. 2023/06/20 12:46:14 fuzzer started 2023/06/20 12:46:14 dialing manager at localhost:36067 2023/06/20 12:46:14 checking machine... 2023/06/20 12:46:14 checking revisions... [ 34.603474] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:46:15 testing simple program... [ 34.648359] cgroup: Unknown subsys name 'net' [ 34.717147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:46:14 Registers: info registers vcpu 0 RAX=ffffffff817189eb RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001ca2ea0 RSI=ffffffff817189eb RDI=ffff88800e517570 RBP=ffff88800e517540 RSP=ffff88800e5174a0 R8 =0000000000000001 R9 =ffff88800e5174e8 R10=0000000000038001 R11=000000000001dcef R12=ffff88800e517570 R13=0000000000000000 R14=ffff88800fd98000 R15=0000000000000000 RIP=ffffffff813ad470 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f612a115900 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=00007f6129559f10 CR3=0000000013a3e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2de91101425acf8c00000000000ae988 XMM05=a9a0a1693b16f70800000000001327f8 XMM06=dfcdbad4f1609c3700000000001316b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffc48999000 CR3=000000000c9ba000 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