syzkaller login: [ 30.925020] BUG: Bad rss-counter state mm:0000000040783f0b type:MM_FILEPAGES val:33 [ 30.926634] BUG: Bad rss-counter state mm:0000000040783f0b type:MM_ANONPAGES val:22 [ 31.082602] ================================================================== [ 31.083523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.084447] Read of size 8 at addr ffff888018e14058 by task sshd/220 [ 31.085209] [ 31.085438] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.086463] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.087452] Call Trace: [ 31.087784] [ 31.088102] dump_stack_lvl+0x91/0xf0 [ 31.088604] print_report+0xcc/0x620 [ 31.089102] ? __virt_addr_valid+0x102/0x340 [ 31.089660] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090282] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090902] kasan_report+0xbe/0xf0 [ 31.091383] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.092025] vma_interval_tree_remove+0xc75/0xec0 [ 31.092625] vma_prepare+0xc54/0x11a0 [ 31.093109] __split_vma+0x5af/0x950 [ 31.093582] ? __pfx___split_vma+0x10/0x10 [ 31.094123] ? find_held_lock+0x2c/0x110 [ 31.094650] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.095225] ? lock_is_held_type+0x9f/0x120 [ 31.095782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.096387] ? mtree_range_walk+0x632/0x900 [ 31.096940] ? mas_walk+0x5c7/0x7c0 [ 31.097411] do_vmi_munmap+0x1f1/0x2b0 [ 31.097899] mmap_region+0x1f9/0x2660 [ 31.098379] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.098892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.099626] ? __pfx_lock_acquire+0x10/0x10 [ 31.100159] ? __pfx_mmap_region+0x10/0x10 [ 31.100680] ? security_mmap_addr+0x7d/0xa0 [ 31.101209] ? get_unmapped_area+0x1f5/0x3f0 [ 31.101757] do_mmap+0x854/0xf00 [ 31.102194] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.102685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.103238] ksys_mmap_pgoff+0x3af/0x500 [ 31.103745] do_syscall_64+0x3f/0x90 [ 31.104227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.104868] RIP: 0033:0x7f533e74fd82 [ 31.105328] 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 [ 31.107447] RSP: 002b:00007fffc7547b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.108350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f533e74fd82 [ 31.109195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f533db89000 [ 31.110037] RBP: 00007f533db89000 R08: 0000000000000009 R09: 0000000000001000 [ 31.110874] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed619caf70 [ 31.111721] R13: 00007fffc7547b60 R14: 00007fffc7547b90 R15: 00007fffc7547ef0 [ 31.112569] [ 31.112865] [ 31.113088] Allocated by task 213: [ 31.113513] kasan_save_stack+0x22/0x50 [ 31.114019] kasan_set_track+0x25/0x30 [ 31.114506] __kasan_slab_alloc+0x59/0x70 [ 31.115030] kmem_cache_alloc+0x16b/0x370 [ 31.115612] vm_area_dup+0x20/0x160 [ 31.116063] __split_vma+0x170/0x950 [ 31.116523] split_vma+0xc6/0x110 [ 31.116963] mprotect_fixup+0x8d2/0xb30 [ 31.117463] do_mprotect_pkey+0x87e/0xd40 [ 31.117980] __x64_sys_mprotect+0x78/0xc0 [ 31.118500] do_syscall_64+0x3f/0x90 [ 31.118978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119634] [ 31.119850] Freed by task 213: [ 31.120239] kasan_save_stack+0x22/0x50 [ 31.120744] kasan_set_track+0x25/0x30 [ 31.121233] kasan_save_free_info+0x2b/0x50 [ 31.121760] __kasan_slab_free+0x10a/0x190 [ 31.122298] kmem_cache_free+0x10d/0x4d0 [ 31.122801] rcu_core+0x8c8/0x2860 [ 31.123244] __do_softirq+0x1b7/0x7d4 [ 31.123720] [ 31.123933] Last potentially related work creation: [ 31.124519] kasan_save_stack+0x22/0x50 [ 31.125024] __kasan_record_aux_stack+0x8e/0xa0 [ 31.125594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.126235] remove_vma+0x139/0x170 [ 31.126685] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.127240] do_vmi_munmap+0x1f1/0x2b0 [ 31.127807] __vm_munmap+0x138/0x3a0 [ 31.128273] __x64_sys_munmap+0x59/0x80 [ 31.128765] do_syscall_64+0x3f/0x90 [ 31.129233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129871] [ 31.130088] The buggy address belongs to the object at ffff888018e14000 [ 31.130088] which belongs to the cache vm_area_struct of size 168 [ 31.131545] The buggy address is located 88 bytes inside of [ 31.131545] freed 168-byte region [ffff888018e14000, ffff888018e140a8) [ 31.132953] [ 31.133171] The buggy address belongs to the physical page: [ 31.133843] page:00000000e0c28d78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e14 [ 31.134943] memcg:ffff888019faec01 [ 31.135370] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.136033] page_type: 0xffffffff() [ 31.136489] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.137419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019faec01 [ 31.138334] page dumped because: kasan: bad access detected [ 31.138991] [ 31.139204] Memory state around the buggy address: [ 31.139798] ffff888018e13f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.140650] ffff888018e13f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.141512] >ffff888018e14000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.142396] ^ [ 31.143152] ffff888018e14080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.144067] ffff888018e14100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.144967] ================================================================== [ 31.146300] Disabling lock debugging due to kernel taint [ 33.236552] BUG: Bad rss-counter state mm:000000008b445928 type:MM_FILEPAGES val:33 [ 33.237707] BUG: Bad rss-counter state mm:000000008b445928 type:MM_ANONPAGES val:22 [ 33.636974] BUG: Bad rss-counter state mm:000000002e04fab7 type:MM_FILEPAGES val:33 [ 33.638053] BUG: Bad rss-counter state mm:000000002e04fab7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19335' (ECDSA) to the list of known hosts. 2023/06/19 21:08:27 fuzzer started 2023/06/19 21:08:27 dialing manager at localhost:44161 2023/06/19 21:08:27 checking machine... 2023/06/19 21:08:27 checking revisions... [ 34.340607] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:08:27 testing simple program... [ 34.381603] cgroup: Unknown subsys name 'net' [ 34.426634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:26 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=00007faa7ea87f70 CR3=000000000de3c000 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=2036323a38303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880173451c0 RSI=00000000000000e5 RDI=ffff888015e2a000 RBP=ffff88800e907c48 RSP=ffff88800e907c38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=00000000fffff000 R13=ffff888008c78000 R14=ffff88800e907ca0 R15=ffff888015e2a000 RIP=ffffffff8386ad5b RFL=00000293 [--S-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 00007f649fc5b900 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=00007ffd56757000 CR3=00000000095d4000 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