syzkaller login: [ 40.812789] BUG: Bad rss-counter state mm:00000000d338eef1 type:MM_FILEPAGES val:33 [ 40.813531] BUG: Bad rss-counter state mm:00000000d338eef1 type:MM_ANONPAGES val:22 [ 40.998177] ================================================================== [ 40.998793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.999398] Read of size 8 at addr ffff88800caf55c8 by task sshd/222 [ 40.999890] [ 41.000031] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.000614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.001247] Call Trace: [ 41.001453] [ 41.001639] dump_stack_lvl+0x91/0xf0 [ 41.001960] print_report+0xcc/0x620 [ 41.002278] ? __virt_addr_valid+0x102/0x340 [ 41.002638] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.003034] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.003429] kasan_report+0xbe/0xf0 [ 41.003748] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.004151] vma_interval_tree_remove+0xc75/0xec0 [ 41.004556] vma_prepare+0xc54/0x11a0 [ 41.004878] __split_vma+0x5af/0x950 [ 41.005187] ? __pfx___split_vma+0x10/0x10 [ 41.005538] ? find_held_lock+0x2c/0x110 [ 41.005915] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.006283] ? lock_is_held_type+0x9f/0x120 [ 41.006663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.007052] ? mtree_range_walk+0x632/0x900 [ 41.007414] ? mas_walk+0x5c7/0x7c0 [ 41.007770] do_vmi_munmap+0x1f1/0x2b0 [ 41.008092] mmap_region+0x1f9/0x2660 [ 41.008406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.008774] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.009239] ? __pfx_lock_acquire+0x10/0x10 [ 41.009606] ? __pfx_mmap_region+0x10/0x10 [ 41.009974] ? security_mmap_addr+0x7d/0xa0 [ 41.010320] ? get_unmapped_area+0x1f5/0x3f0 [ 41.010703] do_mmap+0x854/0xf00 [ 41.010990] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.011313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.011717] ksys_mmap_pgoff+0x3af/0x500 [ 41.012048] do_syscall_64+0x3f/0x90 [ 41.012362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.017113] RIP: 0033:0x7ffa5c067d82 [ 41.017413] 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 [ 41.018774] RSP: 002b:00007ffe670d87d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.019358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa5c067d82 [ 41.019905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa5b4a1000 [ 41.020446] RBP: 00007ffa5b4a1000 R08: 0000000000000009 R09: 0000000000001000 [ 41.021069] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a79678eb20 [ 41.021638] R13: 00007ffe670d87f0 R14: 00007ffe670d8820 R15: 00007ffe670d8b80 [ 41.022189] [ 41.022378] [ 41.022516] Allocated by task 213: [ 41.022837] kasan_save_stack+0x22/0x50 [ 41.023169] kasan_set_track+0x25/0x30 [ 41.023502] __kasan_slab_alloc+0x59/0x70 [ 41.023859] kmem_cache_alloc+0x16b/0x370 [ 41.024194] vm_area_dup+0x20/0x160 [ 41.024489] __split_vma+0x170/0x950 [ 41.024859] split_vma+0xc6/0x110 [ 41.025146] mprotect_fixup+0x8d2/0xb30 [ 41.025477] do_mprotect_pkey+0x87e/0xd40 [ 41.025836] __x64_sys_mprotect+0x78/0xc0 [ 41.026175] do_syscall_64+0x3f/0x90 [ 41.026482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.026942] [ 41.027082] Freed by task 213: [ 41.027335] kasan_save_stack+0x22/0x50 [ 41.027661] kasan_set_track+0x25/0x30 [ 41.027981] kasan_save_free_info+0x2b/0x50 [ 41.028327] __kasan_slab_free+0x10a/0x190 [ 41.028682] kmem_cache_free+0x10d/0x4d0 [ 41.029027] rcu_core+0x8c8/0x2860 [ 41.029315] __do_softirq+0x1b7/0x7d4 [ 41.029623] [ 41.029772] Last potentially related work creation: [ 41.030147] kasan_save_stack+0x22/0x50 [ 41.030475] __kasan_record_aux_stack+0x8e/0xa0 [ 41.030866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.031280] remove_vma+0x139/0x170 [ 41.031575] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.031972] do_vmi_munmap+0x1f1/0x2b0 [ 41.032286] __vm_munmap+0x138/0x3a0 [ 41.032616] __x64_sys_munmap+0x59/0x80 [ 41.032949] do_syscall_64+0x3f/0x90 [ 41.033256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.033670] [ 41.033814] The buggy address belongs to the object at ffff88800caf5570 [ 41.033814] which belongs to the cache vm_area_struct of size 168 [ 41.034756] The buggy address is located 88 bytes inside of [ 41.034756] freed 168-byte region [ffff88800caf5570, ffff88800caf5618) [ 41.035647] [ 41.035795] The buggy address belongs to the physical page: [ 41.036221] page:0000000087a58702 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaf5 [ 41.036964] memcg:ffff88800f0c7001 [ 41.037237] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.037722] page_type: 0xffffffff() [ 41.038024] raw: 0100000000000200 ffff88800879fc80 ffffea00003ca780 dead000000000009 [ 41.038616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0c7001 [ 41.039197] page dumped because: kasan: bad access detected [ 41.039638] [ 41.039807] Memory state around the buggy address: [ 41.040183] ffff88800caf5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.040765] ffff88800caf5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 41.041320] >ffff88800caf5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.041899] ^ [ 41.042327] ffff88800caf5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.042924] ffff88800caf5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.043455] ================================================================== [ 41.048686] Disabling lock debugging due to kernel taint [ 43.147653] BUG: Bad rss-counter state mm:000000006c5052fd type:MM_FILEPAGES val:33 [ 43.148398] BUG: Bad rss-counter state mm:000000006c5052fd type:MM_ANONPAGES val:22 [ 44.631849] BUG: Bad rss-counter state mm:0000000006db9511 type:MM_FILEPAGES val:33 [ 44.636716] BUG: Bad rss-counter state mm:0000000006db9511 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47750' (ECDSA) to the list of known hosts. 2023/06/20 10:05:36 fuzzer started 2023/06/20 10:05:36 dialing manager at localhost:44161 2023/06/20 10:05:37 checking machine... 2023/06/20 10:05:37 checking revisions... [ 45.523010] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:05:37 testing simple program... [ 45.590458] cgroup: Unknown subsys name 'net' [ 45.625450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:05:34 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=ffff888008c58000 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=00007efc2c16a328 CR3=000000000ca78000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7473207265746e756f632d7373722064 XMM04=61203530203763203030206631206630 XMM05=6666206666203066203030206433203e XMM06=30302039302038622066652039382038 XMM07=00000000000000000000000000000000 XMM08=6c61762053454741504e4f4e415f4d4d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=0000556b35cba4d0 CR3=00000000137c4000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000