syzkaller login: [ 60.914122] BUG: Bad rss-counter state mm:00000000633ea53c type:MM_FILEPAGES val:33 [ 60.915176] BUG: Bad rss-counter state mm:00000000633ea53c type:MM_ANONPAGES val:22 [ 61.018531] ================================================================== [ 61.019635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.020798] Read of size 8 at addr ffff888019212b38 by task sshd/224 [ 61.021679] [ 61.021802] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.022317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.022902] Call Trace: [ 61.023093] [ 61.023271] dump_stack_lvl+0x91/0xf0 [ 61.023600] print_report+0xcc/0x620 [ 61.023893] ? __virt_addr_valid+0x102/0x340 [ 61.024231] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.024599] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.024977] kasan_report+0xbe/0xf0 [ 61.025268] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.025644] vma_interval_tree_remove+0xc75/0xec0 [ 61.026001] vma_prepare+0xc54/0x11a0 [ 61.026295] __split_vma+0x5af/0x950 [ 61.026577] ? __pfx___split_vma+0x10/0x10 [ 61.026873] ? find_held_lock+0x2c/0x110 [ 61.027163] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.027493] ? lock_is_held_type+0x9f/0x120 [ 61.027800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.028151] ? mtree_range_walk+0x632/0x900 [ 61.028469] ? mas_walk+0x5c7/0x7c0 [ 61.028739] do_vmi_munmap+0x1f1/0x2b0 [ 61.029023] mmap_region+0x1f9/0x2660 [ 61.029317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.029626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.030053] ? __pfx_lock_acquire+0x10/0x10 [ 61.030371] ? __pfx_mmap_region+0x10/0x10 [ 61.030690] ? security_mmap_addr+0x7d/0xa0 [ 61.031023] ? get_unmapped_area+0x1f5/0x3f0 [ 61.031355] do_mmap+0x854/0xf00 [ 61.031637] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.031942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.032284] ksys_mmap_pgoff+0x3af/0x500 [ 61.032589] do_syscall_64+0x3f/0x90 [ 61.032881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.033271] RIP: 0033:0x7fea25e7ad82 [ 61.033551] 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 [ 61.034840] RSP: 002b:00007ffdb4d593f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.035402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea25e7ad82 [ 61.035932] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea252b4000 [ 61.036455] RBP: 00007fea252b4000 R08: 0000000000000009 R09: 0000000000001000 [ 61.036955] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce98cf9ec0 [ 61.037474] R13: 00007ffdb4d59410 R14: 00007ffdb4d59440 R15: 00007ffdb4d597a0 [ 61.037999] [ 61.038171] [ 61.038301] Allocated by task 217: [ 61.038561] kasan_save_stack+0x22/0x50 [ 61.038864] kasan_set_track+0x25/0x30 [ 61.039157] __kasan_slab_alloc+0x59/0x70 [ 61.039465] kmem_cache_alloc+0x16b/0x370 [ 61.039795] vm_area_dup+0x20/0x160 [ 61.040068] __split_vma+0x170/0x950 [ 61.040350] split_vma+0xc6/0x110 [ 61.040608] mprotect_fixup+0x8d2/0xb30 [ 61.040907] do_mprotect_pkey+0x87e/0xd40 [ 61.041225] __x64_sys_mprotect+0x78/0xc0 [ 61.041542] do_syscall_64+0x3f/0x90 [ 61.041830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.042218] [ 61.042353] Freed by task 19: [ 61.042579] kasan_save_stack+0x22/0x50 [ 61.042876] kasan_set_track+0x25/0x30 [ 61.043169] kasan_save_free_info+0x2b/0x50 [ 61.043502] __kasan_slab_free+0x10a/0x190 [ 61.043819] kmem_cache_free+0x10d/0x4d0 [ 61.044118] rcu_core+0x8c8/0x2860 [ 61.044386] __do_softirq+0x1b7/0x7d4 [ 61.044674] [ 61.044808] Last potentially related work creation: [ 61.045160] kasan_save_stack+0x22/0x50 [ 61.045463] __kasan_record_aux_stack+0x8e/0xa0 [ 61.045817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.046198] remove_vma+0x139/0x170 [ 61.046472] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.046819] do_vmi_munmap+0x1f1/0x2b0 [ 61.047108] __vm_munmap+0x138/0x3a0 [ 61.047392] __x64_sys_munmap+0x59/0x80 [ 61.047699] do_syscall_64+0x3f/0x90 [ 61.047986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.048378] [ 61.048510] The buggy address belongs to the object at ffff888019212ae0 [ 61.048510] which belongs to the cache vm_area_struct of size 168 [ 61.049417] The buggy address is located 88 bytes inside of [ 61.049417] freed 168-byte region [ffff888019212ae0, ffff888019212b88) [ 61.050276] [ 61.050402] The buggy address belongs to the physical page: [ 61.050810] page:000000006b8c6657 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19212 [ 61.051498] memcg:ffff888018092d01 [ 61.051757] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.052148] page_type: 0xffffffff() [ 61.052421] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.052983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018092d01 [ 61.053534] page dumped because: kasan: bad access detected [ 61.053937] [ 61.054065] Memory state around the buggy address: [ 61.054418] ffff888019212a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.054941] ffff888019212a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 61.055462] >ffff888019212b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.055993] ^ [ 61.056367] ffff888019212b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.056876] ffff888019212c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.057387] ================================================================== [ 61.057923] Disabling lock debugging due to kernel taint [ 63.240355] BUG: Bad rss-counter state mm:00000000058f58a0 type:MM_FILEPAGES val:33 [ 63.241530] BUG: Bad rss-counter state mm:00000000058f58a0 type:MM_ANONPAGES val:22 [ 63.728824] BUG: Bad rss-counter state mm:000000001b2e210a type:MM_FILEPAGES val:33 [ 63.729862] BUG: Bad rss-counter state mm:000000001b2e210a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29187' (ECDSA) to the list of known hosts. 2023/06/20 12:40:19 fuzzer started 2023/06/20 12:40:19 dialing manager at localhost:36067 2023/06/20 12:40:19 checking machine... 2023/06/20 12:40:19 checking revisions... [ 64.473701] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:40:20 testing simple program... [ 64.525023] cgroup: Unknown subsys name 'net' [ 64.565701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:40:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff866212df RCX=ffffffff81007b62 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88806ce099d0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b54e7 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800daffd80 RIP=ffffffff814c0274 RFL=00000246 [---Z-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 =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=00007f70f5c6c020 CR3=000000000e878000 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=2039313a30343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83861242 RDX=0000000000000001 RSI=ffffffff863dd524 RDI=ffffffff85fc0f2c RBP=ffffffff85fc0f2c RSP=ffff88801a867948 R8 =ffffffff863dd524 R9 =ffff88801a867a40 R10=0000000000038001 R11=000000000009195a R12=ffffffff85fc0f2c R13=ffffffff85fc0f2c R14=ffffffff85fc0f2c R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000246 [---Z-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fccb0072900 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=00007fff0b28b000 CR3=000000000dc9c000 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