syzkaller login: [ 51.818014] BUG: Bad rss-counter state mm:00000000277a6ef2 type:MM_FILEPAGES val:33 [ 51.819405] BUG: Bad rss-counter state mm:00000000277a6ef2 type:MM_ANONPAGES val:22 [ 51.998498] ================================================================== [ 51.999410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.000350] Read of size 8 at addr ffff88800efcd4e0 by task sshd/220 [ 52.001113] [ 52.001434] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.002299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.003429] Call Trace: [ 52.003804] [ 52.004141] dump_stack_lvl+0x91/0xf0 [ 52.004716] print_report+0xcc/0x620 [ 52.005322] ? __virt_addr_valid+0x102/0x340 [ 52.005976] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.006661] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.007304] kasan_report+0xbe/0xf0 [ 52.007781] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.008397] vma_interval_tree_remove+0xc75/0xec0 [ 52.008993] vma_prepare+0xc54/0x11a0 [ 52.009494] __split_vma+0x5af/0x950 [ 52.009960] ? __pfx___split_vma+0x10/0x10 [ 52.010494] ? find_held_lock+0x2c/0x110 [ 52.011016] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.011590] ? lock_is_held_type+0x9f/0x120 [ 52.012125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.012727] ? mtree_range_walk+0x632/0x900 [ 52.013370] ? mas_walk+0x5c7/0x7c0 [ 52.013905] do_vmi_munmap+0x1f1/0x2b0 [ 52.014439] mmap_region+0x1f9/0x2660 [ 52.014924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.015459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.016201] ? __pfx_lock_acquire+0x10/0x10 [ 52.016755] ? __pfx_mmap_region+0x10/0x10 [ 52.017298] ? security_mmap_addr+0x7d/0xa0 [ 52.017856] ? get_unmapped_area+0x1f5/0x3f0 [ 52.018439] do_mmap+0x854/0xf00 [ 52.018879] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.019379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.019942] ksys_mmap_pgoff+0x3af/0x500 [ 52.020445] do_syscall_64+0x3f/0x90 [ 52.020922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.021588] RIP: 0033:0x7fb9129e4d82 [ 52.022046] 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 [ 52.024210] RSP: 002b:00007ffe72364d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.025117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9129e4d82 [ 52.025999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb911e1e000 [ 52.026848] RBP: 00007fb911e1e000 R08: 0000000000000009 R09: 0000000000001000 [ 52.027703] R10: 0000000000000812 R11: 0000000000000206 R12: 000056290419dd90 [ 52.028548] R13: 00007ffe72364da0 R14: 00007ffe72364dd0 R15: 00007ffe72365130 [ 52.029418] [ 52.029710] [ 52.029930] Allocated by task 213: [ 52.030356] kasan_save_stack+0x22/0x50 [ 52.030881] kasan_set_track+0x25/0x30 [ 52.031377] __kasan_slab_alloc+0x59/0x70 [ 52.031907] kmem_cache_alloc+0x16b/0x370 [ 52.032419] vm_area_dup+0x20/0x160 [ 52.032873] __split_vma+0x170/0x950 [ 52.033371] split_vma+0xc6/0x110 [ 52.033814] mprotect_fixup+0x8d2/0xb30 [ 52.034316] do_mprotect_pkey+0x87e/0xd40 [ 52.034840] __x64_sys_mprotect+0x78/0xc0 [ 52.035355] do_syscall_64+0x3f/0x90 [ 52.035830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.036473] [ 52.036686] Freed by task 203: [ 52.037077] kasan_save_stack+0x22/0x50 [ 52.037591] kasan_set_track+0x25/0x30 [ 52.038082] kasan_save_free_info+0x2b/0x50 [ 52.038624] __kasan_slab_free+0x10a/0x190 [ 52.039158] kmem_cache_free+0x10d/0x4d0 [ 52.039680] rcu_core+0x8c8/0x2860 [ 52.040133] __do_softirq+0x1b7/0x7d4 [ 52.040623] [ 52.040843] Last potentially related work creation: [ 52.041485] kasan_save_stack+0x22/0x50 [ 52.042005] __kasan_record_aux_stack+0x8e/0xa0 [ 52.042601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.043253] remove_vma+0x139/0x170 [ 52.043732] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.044302] do_vmi_munmap+0x1f1/0x2b0 [ 52.044791] __vm_munmap+0x138/0x3a0 [ 52.045278] __x64_sys_munmap+0x59/0x80 [ 52.045777] do_syscall_64+0x3f/0x90 [ 52.046247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.046896] [ 52.047111] The buggy address belongs to the object at ffff88800efcd488 [ 52.047111] which belongs to the cache vm_area_struct of size 168 [ 52.048605] The buggy address is located 88 bytes inside of [ 52.048605] freed 168-byte region [ffff88800efcd488, ffff88800efcd530) [ 52.050047] [ 52.050264] The buggy address belongs to the physical page: [ 52.050946] page:0000000076094305 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefcd [ 52.052074] memcg:ffff8880095c8501 [ 52.052518] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.053182] page_type: 0xffffffff() [ 52.053659] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.054588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c8501 [ 52.055514] page dumped because: kasan: bad access detected [ 52.056197] [ 52.056418] Memory state around the buggy address: [ 52.057050] ffff88800efcd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.057944] ffff88800efcd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 52.058815] >ffff88800efcd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.059685] ^ [ 52.060455] ffff88800efcd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 52.061386] ffff88800efcd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.062254] ================================================================== [ 52.063296] Disabling lock debugging due to kernel taint [ 54.034595] BUG: Bad rss-counter state mm:0000000015e6f605 type:MM_FILEPAGES val:33 [ 54.036290] BUG: Bad rss-counter state mm:0000000015e6f605 type:MM_ANONPAGES val:22 [ 54.581919] BUG: Bad rss-counter state mm:00000000dafa0723 type:MM_FILEPAGES val:33 [ 54.583604] BUG: Bad rss-counter state mm:00000000dafa0723 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3319' (ECDSA) to the list of known hosts. 2023/06/20 00:05:41 fuzzer started 2023/06/20 00:05:41 dialing manager at localhost:44161 2023/06/20 00:05:41 checking machine... 2023/06/20 00:05:41 checking revisions... [ 55.386052] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:05:41 testing simple program... [ 55.435489] cgroup: Unknown subsys name 'net' [ 55.482586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:19 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=00007ffcf3be2e68 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=00007f9c006e35100000561c7fd91790 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=0000000080010000 RBX=1ffff1100d9e13a8 RCX=ffffffff813ed9d5 RDX=ffff88800e7f0000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800e7f0000 RSP=ffff88806cf09d30 R8 =0000000000000007 R9 =ffffffffffffffff R10=ffffffffffffffff R11=00000000000b6996 R12=ffffffffffffffff R13=ffff88800e7f06c0 R14=ffff88800e9ff3c8 R15=ffffffffffffffff RIP=ffffffff814c07eb RFL=00000046 [---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 00007f518b562700 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=00007ff39566c320 CR3=00000000180e6000 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=2030343a35303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000