syzkaller login: [ 29.886828] sshd (212) used greatest stack depth: 24128 bytes left [ 29.887667] BUG: Bad rss-counter state mm:00000000eea9df13 type:MM_FILEPAGES val:33 [ 29.889045] BUG: Bad rss-counter state mm:00000000eea9df13 type:MM_ANONPAGES val:22 [ 30.048616] ================================================================== [ 30.049537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.050492] Read of size 8 at addr ffff88800eff2968 by task sshd/220 [ 30.051261] [ 30.051484] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.052495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.053477] Call Trace: [ 30.053798] [ 30.054082] dump_stack_lvl+0x91/0xf0 [ 30.054597] print_report+0xcc/0x620 [ 30.055086] ? __virt_addr_valid+0x102/0x340 [ 30.055643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.056268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.056919] kasan_report+0xbe/0xf0 [ 30.057403] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.058035] vma_interval_tree_remove+0xc75/0xec0 [ 30.058669] vma_prepare+0xc54/0x11a0 [ 30.059175] __split_vma+0x5af/0x950 [ 30.059675] ? __pfx___split_vma+0x10/0x10 [ 30.060232] ? find_held_lock+0x2c/0x110 [ 30.060801] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.061399] ? lock_is_held_type+0x9f/0x120 [ 30.061969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.062615] ? mtree_range_walk+0x632/0x900 [ 30.063202] ? mas_walk+0x5c7/0x7c0 [ 30.063710] do_vmi_munmap+0x1f1/0x2b0 [ 30.064237] mmap_region+0x1f9/0x2660 [ 30.064764] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.065313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.066088] ? __pfx_lock_acquire+0x10/0x10 [ 30.066654] ? __pfx_mmap_region+0x10/0x10 [ 30.067227] ? security_mmap_addr+0x7d/0xa0 [ 30.067791] ? get_unmapped_area+0x1f5/0x3f0 [ 30.068385] do_mmap+0x854/0xf00 [ 30.068878] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.069424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.070021] ksys_mmap_pgoff+0x3af/0x500 [ 30.070556] do_syscall_64+0x3f/0x90 [ 30.071059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.071744] RIP: 0033:0x7f3a0d613d82 [ 30.072228] 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 [ 30.074527] RSP: 002b:00007ffe0f863928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.075495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a0d613d82 [ 30.076404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a0ca4d000 [ 30.077339] RBP: 00007f3a0ca4d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.078252] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565550ae2f70 [ 30.079165] R13: 00007ffe0f863940 R14: 00007ffe0f863970 R15: 00007ffe0f863cd0 [ 30.080086] [ 30.080396] [ 30.080629] Allocated by task 212: [ 30.081091] kasan_save_stack+0x22/0x50 [ 30.081625] kasan_set_track+0x25/0x30 [ 30.082146] __kasan_slab_alloc+0x59/0x70 [ 30.082707] kmem_cache_alloc+0x16b/0x370 [ 30.083257] vm_area_dup+0x20/0x160 [ 30.083743] __split_vma+0x170/0x950 [ 30.084237] split_vma+0xc6/0x110 [ 30.084744] mprotect_fixup+0x8d2/0xb30 [ 30.085274] do_mprotect_pkey+0x87e/0xd40 [ 30.085833] __x64_sys_mprotect+0x78/0xc0 [ 30.086388] do_syscall_64+0x3f/0x90 [ 30.086894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.087590] [ 30.087819] Freed by task 212: [ 30.088236] kasan_save_stack+0x22/0x50 [ 30.088792] kasan_set_track+0x25/0x30 [ 30.089324] kasan_save_free_info+0x2b/0x50 [ 30.089888] __kasan_slab_free+0x10a/0x190 [ 30.090456] kmem_cache_free+0x10d/0x4d0 [ 30.091012] rcu_core+0x8c8/0x2860 [ 30.091485] __do_softirq+0x1b7/0x7d4 [ 30.091992] [ 30.092218] Last potentially related work creation: [ 30.092865] kasan_save_stack+0x22/0x50 [ 30.093509] __kasan_record_aux_stack+0x8e/0xa0 [ 30.094127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.094809] remove_vma+0x139/0x170 [ 30.095292] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.095879] do_vmi_munmap+0x1f1/0x2b0 [ 30.096403] __vm_munmap+0x138/0x3a0 [ 30.096914] __x64_sys_munmap+0x59/0x80 [ 30.097445] do_syscall_64+0x3f/0x90 [ 30.097951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.098633] [ 30.098867] The buggy address belongs to the object at ffff88800eff2910 [ 30.098867] which belongs to the cache vm_area_struct of size 168 [ 30.100428] The buggy address is located 88 bytes inside of [ 30.100428] freed 168-byte region [ffff88800eff2910, ffff88800eff29b8) [ 30.101940] [ 30.102171] The buggy address belongs to the physical page: [ 30.102886] page:0000000077665f0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeff2 [ 30.104040] memcg:ffff88800e551001 [ 30.104682] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.105441] page_type: 0xffffffff() [ 30.105919] raw: 0100000000000200 ffff88800879fc80 ffffea00004f06c0 dead000000000005 [ 30.106902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e551001 [ 30.107872] page dumped because: kasan: bad access detected [ 30.108592] [ 30.108823] Memory state around the buggy address: [ 30.109441] ffff88800eff2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.110356] ffff88800eff2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.111267] >ffff88800eff2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.112174] ^ [ 30.113025] ffff88800eff2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.113939] ffff88800eff2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.114850] ================================================================== [ 30.115862] Disabling lock debugging due to kernel taint [ 32.181154] BUG: Bad rss-counter state mm:00000000170bba4e type:MM_FILEPAGES val:33 [ 32.182380] BUG: Bad rss-counter state mm:00000000170bba4e type:MM_ANONPAGES val:22 [ 32.749631] BUG: Bad rss-counter state mm:0000000046b4d9e3 type:MM_FILEPAGES val:33 [ 32.750812] BUG: Bad rss-counter state mm:0000000046b4d9e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37914' (ECDSA) to the list of known hosts. 2023/06/19 21:18:08 fuzzer started 2023/06/19 21:18:08 dialing manager at localhost:44161 2023/06/19 21:18:08 checking machine... 2023/06/19 21:18:08 checking revisions... [ 33.370678] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:18:08 testing simple program... [ 33.421240] cgroup: Unknown subsys name 'net' [ 33.462784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe06b39848 CR3=0000000005482000 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=00007f7c79227510000056362a20e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000001ff RBX=ffff8880183674e0 RCX=ffffffff818e9c35 RDX=ffff88800f6951c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000008 RSP=ffff88800fedfd50 R8 =0000000000000007 R9 =ffffffffffffffff R10=00000000000001ff R11=0000000000000000 R12=0000000000000008 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000207 [-----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 00007faa6b899900 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=00007ffd1aea9000 CR3=000000000965c000 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