syzkaller login: [ 30.856158] BUG: Bad rss-counter state mm:0000000038d534a8 type:MM_FILEPAGES val:33 [ 30.857926] BUG: Bad rss-counter state mm:0000000038d534a8 type:MM_ANONPAGES val:22 [ 31.037213] ================================================================== [ 31.038225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.039237] Read of size 8 at addr ffff88800ed665c8 by task sshd/221 [ 31.040175] [ 31.040416] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.041351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.042430] Call Trace: [ 31.042771] [ 31.043080] dump_stack_lvl+0x91/0xf0 [ 31.043604] print_report+0xcc/0x620 [ 31.044127] ? __virt_addr_valid+0x102/0x340 [ 31.044732] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045401] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046061] kasan_report+0xbe/0xf0 [ 31.046571] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047249] vma_interval_tree_remove+0xc75/0xec0 [ 31.047901] vma_prepare+0xc54/0x11a0 [ 31.048433] __split_vma+0x5af/0x950 [ 31.048948] ? __pfx___split_vma+0x10/0x10 [ 31.049516] ? find_held_lock+0x2c/0x110 [ 31.050084] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.050701] ? lock_is_held_type+0x9f/0x120 [ 31.051289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.051951] ? mtree_range_walk+0x632/0x900 [ 31.052568] ? mas_walk+0x5c7/0x7c0 [ 31.053086] do_vmi_munmap+0x1f1/0x2b0 [ 31.053625] mmap_region+0x1f9/0x2660 [ 31.054148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.054692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.055476] ? __pfx_lock_acquire+0x10/0x10 [ 31.056052] ? __pfx_mmap_region+0x10/0x10 [ 31.056637] ? security_mmap_addr+0x7d/0xa0 [ 31.057216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.057811] do_mmap+0x854/0xf00 [ 31.058288] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.058826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.059437] ksys_mmap_pgoff+0x3af/0x500 [ 31.059989] do_syscall_64+0x3f/0x90 [ 31.060519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.061230] RIP: 0033:0x7f2101e1ed82 [ 31.061730] 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 [ 31.064012] RSP: 002b:00007ffd8c6546c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.065003] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2101e1ed82 [ 31.065908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2101258000 [ 31.066815] RBP: 00007f2101258000 R08: 0000000000000009 R09: 0000000000001000 [ 31.067722] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a23855aec0 [ 31.068627] R13: 00007ffd8c6546e0 R14: 00007ffd8c654710 R15: 00007ffd8c654a70 [ 31.069538] [ 31.069850] [ 31.070079] Allocated by task 214: [ 31.070534] kasan_save_stack+0x22/0x50 [ 31.071087] kasan_set_track+0x25/0x30 [ 31.071616] __kasan_slab_alloc+0x59/0x70 [ 31.072182] kmem_cache_alloc+0x16b/0x370 [ 31.072765] vm_area_dup+0x20/0x160 [ 31.073265] __split_vma+0x170/0x950 [ 31.073775] split_vma+0xc6/0x110 [ 31.074249] mprotect_fixup+0x8d2/0xb30 [ 31.074781] do_mprotect_pkey+0x87e/0xd40 [ 31.075339] __x64_sys_mprotect+0x78/0xc0 [ 31.075895] do_syscall_64+0x3f/0x90 [ 31.076411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077112] [ 31.077342] Freed by task 214: [ 31.077759] kasan_save_stack+0x22/0x50 [ 31.078298] kasan_set_track+0x25/0x30 [ 31.078826] kasan_save_free_info+0x2b/0x50 [ 31.079391] __kasan_slab_free+0x10a/0x190 [ 31.079960] kmem_cache_free+0x10d/0x4d0 [ 31.080518] rcu_core+0x8c8/0x2860 [ 31.080991] __do_softirq+0x1b7/0x7d4 [ 31.081501] [ 31.081731] Last potentially related work creation: [ 31.082353] kasan_save_stack+0x22/0x50 [ 31.082890] __kasan_record_aux_stack+0x8e/0xa0 [ 31.083508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.084204] remove_vma+0x139/0x170 [ 31.084693] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.085294] do_vmi_munmap+0x1f1/0x2b0 [ 31.085818] __vm_munmap+0x138/0x3a0 [ 31.086323] __x64_sys_munmap+0x59/0x80 [ 31.086858] do_syscall_64+0x3f/0x90 [ 31.087371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088069] [ 31.088299] Second to last potentially related work creation: [ 31.089049] kasan_save_stack+0x22/0x50 [ 31.089589] __kasan_record_aux_stack+0x8e/0xa0 [ 31.090212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.090903] remove_vma+0x139/0x170 [ 31.091390] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.091992] do_vmi_munmap+0x1f1/0x2b0 [ 31.092521] mmap_region+0x1f9/0x2660 [ 31.093041] do_mmap+0x854/0xf00 [ 31.093507] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.094031] ksys_mmap_pgoff+0x3af/0x500 [ 31.094570] do_syscall_64+0x3f/0x90 [ 31.095087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095774] [ 31.096003] The buggy address belongs to the object at ffff88800ed66570 [ 31.096003] which belongs to the cache vm_area_struct of size 168 [ 31.097588] The buggy address is located 88 bytes inside of [ 31.097588] freed 168-byte region [ffff88800ed66570, ffff88800ed66618) [ 31.099098] [ 31.099333] The buggy address belongs to the physical page: [ 31.100038] page:000000004e6da236 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed66 [ 31.101205] memcg:ffff88800df2b501 [ 31.101662] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.102357] page_type: 0xffffffff() [ 31.102842] raw: 0100000000000200 ffff8880087a0c80 ffffea0000692fc0 dead000000000008 [ 31.103821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df2b501 [ 31.104813] page dumped because: kasan: bad access detected [ 31.105518] [ 31.105746] Memory state around the buggy address: [ 31.106366] ffff88800ed66480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.107294] ffff88800ed66500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.108206] >ffff88800ed66580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.109127] ^ [ 31.109841] ffff88800ed66600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.110765] ffff88800ed66680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.111676] ================================================================== [ 31.112876] Disabling lock debugging due to kernel taint [ 33.067709] BUG: Bad rss-counter state mm:00000000e849b3ae type:MM_FILEPAGES val:33 [ 33.068834] BUG: Bad rss-counter state mm:00000000e849b3ae type:MM_ANONPAGES val:22 [ 33.561131] BUG: Bad rss-counter state mm:00000000b13f7ee3 type:MM_FILEPAGES val:33 [ 33.562328] BUG: Bad rss-counter state mm:00000000b13f7ee3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16749' (ECDSA) to the list of known hosts. 2023/06/20 20:48:39 fuzzer started 2023/06/20 20:48:39 dialing manager at localhost:36067 2023/06/20 20:48:39 checking machine... 2023/06/20 20:48:39 checking revisions... [ 34.276625] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:48:39 testing simple program... [ 34.338530] cgroup: Unknown subsys name 'net' [ 34.445396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:48:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880165bfc50 RCX=ffffffff81f30ade RDX=ffff888019f6d1c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff8880165bfc68 RSP=ffff8880165bf998 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880165bfc60 R15=0000000000001032 RIP=ffffffff814c0860 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 00007fd29cf9d900 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=00007fff34832000 CR3=000000000e888000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fca6a2c9020 CR3=0000000016966000 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=2038333a38343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000