syzkaller login: [ 29.012964] BUG: Bad rss-counter state mm:00000000acc9ccd9 type:MM_FILEPAGES val:33 [ 29.014216] BUG: Bad rss-counter state mm:00000000acc9ccd9 type:MM_ANONPAGES val:22 [ 29.062459] ================================================================== [ 29.063674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.064825] Read of size 8 at addr ffff88800c6d3a50 by task sshd/221 [ 29.065724] [ 29.065970] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.066873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.067903] Call Trace: [ 29.068247] [ 29.068551] dump_stack_lvl+0x91/0xf0 [ 29.069070] print_report+0xcc/0x620 [ 29.069622] ? __virt_addr_valid+0x102/0x340 [ 29.070223] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.070874] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.071521] kasan_report+0xbe/0xf0 [ 29.072022] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.072673] vma_interval_tree_remove+0xc75/0xec0 [ 29.073316] vma_prepare+0xc54/0x11a0 [ 29.073826] __split_vma+0x5af/0x950 [ 29.074324] ? __pfx___split_vma+0x10/0x10 [ 29.074879] ? find_held_lock+0x2c/0x110 [ 29.075429] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.076022] ? lock_is_held_type+0x9f/0x120 [ 29.076590] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.077252] ? mtree_range_walk+0x632/0x900 [ 29.077839] ? mas_walk+0x5c7/0x7c0 [ 29.078342] do_vmi_munmap+0x1f1/0x2b0 [ 29.078866] mmap_region+0x1f9/0x2660 [ 29.079373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.079918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.080674] ? __pfx_lock_acquire+0x10/0x10 [ 29.081246] ? __pfx_mmap_region+0x10/0x10 [ 29.081806] ? security_mmap_addr+0x7d/0xa0 [ 29.082367] ? get_unmapped_area+0x1f5/0x3f0 [ 29.082950] do_mmap+0x854/0xf00 [ 29.083412] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.083937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.084528] ksys_mmap_pgoff+0x3af/0x500 [ 29.085063] do_syscall_64+0x3f/0x90 [ 29.085582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.086267] RIP: 0033:0x7fd260876d82 [ 29.086747] 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 [ 29.089023] RSP: 002b:00007ffead480168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.089998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd260876d82 [ 29.090897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd25fcb0000 [ 29.091790] RBP: 00007fd25fcb0000 R08: 0000000000000009 R09: 0000000000001000 [ 29.092682] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e03731f70 [ 29.093590] R13: 00007ffead480180 R14: 00007ffead4801b0 R15: 00007ffead480510 [ 29.094507] [ 29.094820] [ 29.095055] Allocated by task 212: [ 29.095511] kasan_save_stack+0x22/0x50 [ 29.096041] kasan_set_track+0x25/0x30 [ 29.096566] __kasan_slab_alloc+0x59/0x70 [ 29.097119] kmem_cache_alloc+0x16b/0x370 [ 29.097680] vm_area_dup+0x20/0x160 [ 29.098173] __split_vma+0x170/0x950 [ 29.098684] split_vma+0xc6/0x110 [ 29.099168] mprotect_fixup+0x8d2/0xb30 [ 29.099721] do_mprotect_pkey+0x87e/0xd40 [ 29.100290] __x64_sys_mprotect+0x78/0xc0 [ 29.100863] do_syscall_64+0x3f/0x90 [ 29.101400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.102104] [ 29.102338] Freed by task 13: [ 29.102758] kasan_save_stack+0x22/0x50 [ 29.103307] kasan_set_track+0x25/0x30 [ 29.103847] kasan_save_free_info+0x2b/0x50 [ 29.104429] __kasan_slab_free+0x10a/0x190 [ 29.105020] kmem_cache_free+0x10d/0x4d0 [ 29.105585] rcu_core+0x8c8/0x2860 [ 29.106076] __do_softirq+0x1b7/0x7d4 [ 29.106597] [ 29.106835] Last potentially related work creation: [ 29.107588] kasan_save_stack+0x22/0x50 [ 29.108141] __kasan_record_aux_stack+0x8e/0xa0 [ 29.108765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.109484] remove_vma+0x139/0x170 [ 29.109980] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.110592] do_vmi_munmap+0x1f1/0x2b0 [ 29.111122] __vm_munmap+0x138/0x3a0 [ 29.111634] __x64_sys_munmap+0x59/0x80 [ 29.112179] do_syscall_64+0x3f/0x90 [ 29.112703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.113411] [ 29.113645] The buggy address belongs to the object at ffff88800c6d39f8 [ 29.113645] which belongs to the cache vm_area_struct of size 168 [ 29.115261] The buggy address is located 88 bytes inside of [ 29.115261] freed 168-byte region [ffff88800c6d39f8, ffff88800c6d3aa0) [ 29.116796] [ 29.117032] The buggy address belongs to the physical page: [ 29.117759] page:00000000c9a4ef21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d3 [ 29.118951] memcg:ffff88800e777001 [ 29.119419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.120186] page_type: 0xffffffff() [ 29.120674] raw: 0100000000000200 ffff8880087a0c80 ffffea00003649c0 dead000000000003 [ 29.121700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e777001 [ 29.122687] page dumped because: kasan: bad access detected [ 29.123413] [ 29.123645] Memory state around the buggy address: [ 29.124279] ffff88800c6d3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.125226] ffff88800c6d3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.126169] >ffff88800c6d3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.127097] ^ [ 29.127863] ffff88800c6d3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 29.128798] ffff88800c6d3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.129752] ================================================================== [ 29.130980] Disabling lock debugging due to kernel taint [ 30.974041] BUG: Bad rss-counter state mm:000000008934a09b type:MM_FILEPAGES val:33 [ 30.974723] BUG: Bad rss-counter state mm:000000008934a09b type:MM_ANONPAGES val:22 [ 31.427109] BUG: Bad rss-counter state mm:0000000020aa6222 type:MM_FILEPAGES val:33 [ 31.428104] BUG: Bad rss-counter state mm:0000000020aa6222 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58429' (ECDSA) to the list of known hosts. 2023/06/20 13:34:56 fuzzer started 2023/06/20 13:34:56 dialing manager at localhost:36067 2023/06/20 13:34:56 checking machine... 2023/06/20 13:34:56 checking revisions... [ 32.156548] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:34:56 testing simple program... [ 32.208430] cgroup: Unknown subsys name 'net' [ 32.261116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800df43a00 RCX=ffffffff81846775 RDX=1ffff11001be8740 RSI=ffffffff81845e00 RDI=ffff88800df43a08 RBP=ffff88806ce09e58 RSP=ffff88806ce09de0 R8 =0000000000000001 R9 =ffffed1001be8742 R10=ffff88800df43a13 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea0000391c00 R14=ffffffff813782f8 R15=ffff88800e470678 RIP=ffffffff81370a75 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 00007f974a68d900 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=00007ffd427de000 CR3=000000000f2ee000 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=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 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=00007fa109916ea0 CR3=000000000e38a000 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=2036353a34333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000