syzkaller login: [ 30.276429] BUG: Bad rss-counter state mm:0000000042062087 type:MM_FILEPAGES val:33 [ 30.277230] BUG: Bad rss-counter state mm:0000000042062087 type:MM_ANONPAGES val:22 [ 30.403351] ================================================================== [ 30.404111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.404718] Read of size 8 at addr ffff8880165445c8 by task sshd/220 [ 30.405233] [ 30.405388] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.405982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.406613] Call Trace: [ 30.406827] [ 30.407012] dump_stack_lvl+0x91/0xf0 [ 30.407358] print_report+0xcc/0x620 [ 30.407743] ? __virt_addr_valid+0x102/0x340 [ 30.408344] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.408774] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.409204] kasan_report+0xbe/0xf0 [ 30.409528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.409961] vma_interval_tree_remove+0xc75/0xec0 [ 30.410430] vma_prepare+0xc54/0x11a0 [ 30.410737] __split_vma+0x5af/0x950 [ 30.411031] ? __pfx___split_vma+0x10/0x10 [ 30.411356] ? find_held_lock+0x2c/0x110 [ 30.411713] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.412088] ? lock_is_held_type+0x9f/0x120 [ 30.412453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.412865] ? mtree_range_walk+0x632/0x900 [ 30.413238] ? mas_walk+0x5c7/0x7c0 [ 30.413567] do_vmi_munmap+0x1f1/0x2b0 [ 30.413928] mmap_region+0x1f9/0x2660 [ 30.414265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.414611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.415102] ? __pfx_lock_acquire+0x10/0x10 [ 30.415495] ? __pfx_mmap_region+0x10/0x10 [ 30.415844] ? security_mmap_addr+0x7d/0xa0 [ 30.416177] ? get_unmapped_area+0x1f5/0x3f0 [ 30.416526] do_mmap+0x854/0xf00 [ 30.416831] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.417173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.417529] ksys_mmap_pgoff+0x3af/0x500 [ 30.417852] do_syscall_64+0x3f/0x90 [ 30.418150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.418561] RIP: 0033:0x7eff32dd9d82 [ 30.418871] 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 [ 30.420381] RSP: 002b:00007ffebaa8d888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.420993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff32dd9d82 [ 30.421542] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff32213000 [ 30.422103] RBP: 00007eff32213000 R08: 0000000000000009 R09: 0000000000001000 [ 30.422665] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556821b8af70 [ 30.423234] R13: 00007ffebaa8d8a0 R14: 00007ffebaa8d8d0 R15: 00007ffebaa8dc30 [ 30.423835] [ 30.424036] [ 30.424182] Allocated by task 213: [ 30.424461] kasan_save_stack+0x22/0x50 [ 30.424795] kasan_set_track+0x25/0x30 [ 30.425106] __kasan_slab_alloc+0x59/0x70 [ 30.425446] kmem_cache_alloc+0x16b/0x370 [ 30.425776] vm_area_dup+0x20/0x160 [ 30.426083] __split_vma+0x170/0x950 [ 30.426406] split_vma+0xc6/0x110 [ 30.426705] mprotect_fixup+0x8d2/0xb30 [ 30.427041] do_mprotect_pkey+0x87e/0xd40 [ 30.427438] __x64_sys_mprotect+0x78/0xc0 [ 30.427818] do_syscall_64+0x3f/0x90 [ 30.428149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.428570] [ 30.428717] Freed by task 0: [ 30.428957] kasan_save_stack+0x22/0x50 [ 30.429284] kasan_set_track+0x25/0x30 [ 30.429599] kasan_save_free_info+0x2b/0x50 [ 30.429938] __kasan_slab_free+0x10a/0x190 [ 30.430286] kmem_cache_free+0x10d/0x4d0 [ 30.430630] rcu_core+0x8c8/0x2860 [ 30.430923] __do_softirq+0x1b7/0x7d4 [ 30.431227] [ 30.431387] Last potentially related work creation: [ 30.431780] kasan_save_stack+0x22/0x50 [ 30.432113] __kasan_record_aux_stack+0x8e/0xa0 [ 30.432483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.432933] remove_vma+0x139/0x170 [ 30.433235] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.433599] do_vmi_munmap+0x1f1/0x2b0 [ 30.433927] __vm_munmap+0x138/0x3a0 [ 30.434262] __x64_sys_munmap+0x59/0x80 [ 30.434584] do_syscall_64+0x3f/0x90 [ 30.434924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.435339] [ 30.435525] The buggy address belongs to the object at ffff888016544570 [ 30.435525] which belongs to the cache vm_area_struct of size 168 [ 30.436611] The buggy address is located 88 bytes inside of [ 30.436611] freed 168-byte region [ffff888016544570, ffff888016544618) [ 30.437518] [ 30.437668] The buggy address belongs to the physical page: [ 30.438129] page:00000000767cb963 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16544 [ 30.438909] memcg:ffff88801671e001 [ 30.439208] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.439725] page_type: 0xffffffff() [ 30.440052] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.440847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801671e001 [ 30.441531] page dumped because: kasan: bad access detected [ 30.442015] [ 30.442157] Memory state around the buggy address: [ 30.442524] ffff888016544480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.443095] ffff888016544500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.443704] >ffff888016544580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.444279] ^ [ 30.444726] ffff888016544600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.445300] ffff888016544680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.445875] ================================================================== [ 30.446609] Disabling lock debugging due to kernel taint [ 31.952745] BUG: Bad rss-counter state mm:000000005cf7a69a type:MM_FILEPAGES val:33 [ 31.953581] BUG: Bad rss-counter state mm:000000005cf7a69a type:MM_ANONPAGES val:22 [ 32.319092] BUG: Bad rss-counter state mm:00000000fe12b07d type:MM_FILEPAGES val:33 [ 32.319789] BUG: Bad rss-counter state mm:00000000fe12b07d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2564' (ECDSA) to the list of known hosts. 2023/06/21 09:26:00 fuzzer started 2023/06/21 09:26:00 dialing manager at localhost:36067 2023/06/21 09:26:00 checking machine... 2023/06/21 09:26:00 checking revisions... [ 32.928382] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:26:00 testing simple program... [ 32.961808] cgroup: Unknown subsys name 'net' [ 32.999902] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:26:00 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=00007ffc9a927c68 CR3=000000000e3f4000 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=2039353a35323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888018e40001 RBX=ffff888018e3f310 RCX=0000000000000001 RDX=ffff888018e3f318 RSI=ffff888018e3f2e0 RDI=ffff888018e3f320 RBP=ffff888018e38000 RSP=ffff888018e3f250 R8 =0000000000000001 R9 =ffff888018e3f350 R10=0000000000038001 R11=0000000000006097 R12=ffff888018e3f370 R13=ffff888018e3f358 R14=ffff888018e3f2e0 R15=ffff888018e3f310 RIP=ffffffff81131cdf RFL=00000283 [--S---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 00007fcff7131900 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=00007ffd52c12000 CR3=0000000019af4000 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