syzkaller login: [ 30.956608] BUG: Bad rss-counter state mm:000000006d9649a2 type:MM_FILEPAGES val:33 [ 30.957346] BUG: Bad rss-counter state mm:000000006d9649a2 type:MM_ANONPAGES val:22 [ 31.069356] ================================================================== [ 31.069991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.070651] Read of size 8 at addr ffff888018fa55c8 by task sshd/220 [ 31.071193] [ 31.071349] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.071955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.072644] Call Trace: [ 31.072943] [ 31.073181] dump_stack_lvl+0x91/0xf0 [ 31.073532] print_report+0xcc/0x620 [ 31.073876] ? __virt_addr_valid+0x102/0x340 [ 31.074267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075154] kasan_report+0xbe/0xf0 [ 31.075457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075802] vma_interval_tree_remove+0xc75/0xec0 [ 31.076136] vma_prepare+0xc54/0x11a0 [ 31.076404] __split_vma+0x5af/0x950 [ 31.076675] ? __pfx___split_vma+0x10/0x10 [ 31.076971] ? find_held_lock+0x2c/0x110 [ 31.077264] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.077579] ? lock_is_held_type+0x9f/0x120 [ 31.077881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.078216] ? mtree_range_walk+0x632/0x900 [ 31.078525] ? mas_walk+0x5c7/0x7c0 [ 31.078792] do_vmi_munmap+0x1f1/0x2b0 [ 31.079066] mmap_region+0x1f9/0x2660 [ 31.079334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.079620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.080017] ? __pfx_lock_acquire+0x10/0x10 [ 31.080312] ? __pfx_mmap_region+0x10/0x10 [ 31.080614] ? security_mmap_addr+0x7d/0xa0 [ 31.080911] ? get_unmapped_area+0x1f5/0x3f0 [ 31.081216] do_mmap+0x854/0xf00 [ 31.081465] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.082055] ksys_mmap_pgoff+0x3af/0x500 [ 31.082341] do_syscall_64+0x3f/0x90 [ 31.082609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082975] RIP: 0033:0x7f7cccb3fd82 [ 31.083230] 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 [ 31.084406] RSP: 002b:00007fff0b38b288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.084932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cccb3fd82 [ 31.085404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ccbf79000 [ 31.085881] RBP: 00007f7ccbf79000 R08: 0000000000000009 R09: 0000000000001000 [ 31.086354] R10: 0000000000000812 R11: 0000000000000206 R12: 000056067f561b20 [ 31.086827] R13: 00007fff0b38b2a0 R14: 00007fff0b38b2d0 R15: 00007fff0b38b630 [ 31.087308] [ 31.087474] [ 31.087597] Allocated by task 213: [ 31.087836] kasan_save_stack+0x22/0x50 [ 31.088117] kasan_set_track+0x25/0x30 [ 31.088390] __kasan_slab_alloc+0x59/0x70 [ 31.088693] kmem_cache_alloc+0x16b/0x370 [ 31.088983] vm_area_dup+0x20/0x160 [ 31.089238] __split_vma+0x170/0x950 [ 31.089496] split_vma+0xc6/0x110 [ 31.089739] mprotect_fixup+0x8d2/0xb30 [ 31.090018] do_mprotect_pkey+0x87e/0xd40 [ 31.090306] __x64_sys_mprotect+0x78/0xc0 [ 31.090593] do_syscall_64+0x3f/0x90 [ 31.090861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091220] [ 31.091341] Freed by task 203: [ 31.091558] kasan_save_stack+0x22/0x50 [ 31.091838] kasan_set_track+0x25/0x30 [ 31.092116] kasan_save_free_info+0x2b/0x50 [ 31.092409] __kasan_slab_free+0x10a/0x190 [ 31.092721] kmem_cache_free+0x10d/0x4d0 [ 31.093005] rcu_core+0x8c8/0x2860 [ 31.093255] __do_softirq+0x1b7/0x7d4 [ 31.093520] [ 31.093641] Last potentially related work creation: [ 31.093968] kasan_save_stack+0x22/0x50 [ 31.094247] __kasan_record_aux_stack+0x8e/0xa0 [ 31.094565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.094926] remove_vma+0x139/0x170 [ 31.095181] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.095491] do_vmi_munmap+0x1f1/0x2b0 [ 31.095760] __vm_munmap+0x138/0x3a0 [ 31.096020] __x64_sys_munmap+0x59/0x80 [ 31.096295] do_syscall_64+0x3f/0x90 [ 31.096566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096926] [ 31.097046] The buggy address belongs to the object at ffff888018fa5570 [ 31.097046] which belongs to the cache vm_area_struct of size 168 [ 31.097852] The buggy address is located 88 bytes inside of [ 31.097852] freed 168-byte region [ffff888018fa5570, ffff888018fa5618) [ 31.098622] [ 31.098743] The buggy address belongs to the physical page: [ 31.099108] page:00000000b642646e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fa5 [ 31.099709] memcg:ffff8880147cda01 [ 31.099947] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.100303] page_type: 0xffffffff() [ 31.100564] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.101074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147cda01 [ 31.101571] page dumped because: kasan: bad access detected [ 31.101939] [ 31.102060] Memory state around the buggy address: [ 31.102380] ffff888018fa5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.102853] ffff888018fa5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.103327] >ffff888018fa5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.103798] ^ [ 31.104168] ffff888018fa5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.104650] ffff888018fa5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.105125] ================================================================== [ 31.105655] Disabling lock debugging due to kernel taint [ 33.082931] BUG: Bad rss-counter state mm:00000000b669b56a type:MM_FILEPAGES val:33 [ 33.084434] BUG: Bad rss-counter state mm:00000000b669b56a type:MM_ANONPAGES val:22 [ 33.636074] BUG: Bad rss-counter state mm:00000000782c8fd1 type:MM_FILEPAGES val:33 [ 33.637359] BUG: Bad rss-counter state mm:00000000782c8fd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10244' (ECDSA) to the list of known hosts. 2023/06/21 03:21:41 fuzzer started 2023/06/21 03:21:41 dialing manager at localhost:36067 2023/06/21 03:21:41 checking machine... 2023/06/21 03:21:41 checking revisions... [ 34.282161] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:21:42 testing simple program... [ 34.346509] cgroup: Unknown subsys name 'net' [ 34.386799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:41 Registers: info registers vcpu 0 RAX=1ffffffff0bb1340 RBX=ffffffff85d89a04 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88800fc5f7c0 R8 =ffffffff8608a556 R9 =ffff88800fc5f908 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-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 00007f38e67fa900 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=00007f38e6db20b0 CR3=000000000f928000 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=2031343a31323a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a31323a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 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=00007fb17cd6ada0 CR3=000000000c6b4000 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=fa7c5ad5b3497f90464476f2fe01b9b8 XMM02=000000000011a2b8eff9b2d0a8fce9cb XMM03=000000000011a3882c67c8bc2e329bc3 XMM04=58797ab9c88159a200000000000ae988 XMM05=19e9129bd510f2350000000000131668 XMM06=4fda316b135da52b00000000001314f0 XMM07=e042d86d42eb936e0000000000121a48 XMM08=7a813a4d9dd77de9000000000011a388 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000