syzkaller login: [ 33.275196] BUG: Bad rss-counter state mm:00000000eb692b03 type:MM_FILEPAGES val:33 [ 33.276803] BUG: Bad rss-counter state mm:00000000eb692b03 type:MM_ANONPAGES val:22 [ 33.431036] ================================================================== [ 33.431913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.432833] Read of size 8 at addr ffff88800e1f2c20 by task sshd/219 [ 33.433791] [ 33.434014] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.434945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.436026] Call Trace: [ 33.436369] [ 33.436668] dump_stack_lvl+0x91/0xf0 [ 33.437198] print_report+0xcc/0x620 [ 33.437750] ? __virt_addr_valid+0x102/0x340 [ 33.438322] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.438960] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.439602] kasan_report+0xbe/0xf0 [ 33.440094] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.440754] vma_interval_tree_remove+0xc75/0xec0 [ 33.441404] vma_prepare+0xc54/0x11a0 [ 33.441923] __split_vma+0x5af/0x950 [ 33.442428] ? __pfx___split_vma+0x10/0x10 [ 33.442984] ? find_held_lock+0x2c/0x110 [ 33.443518] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.444131] ? lock_is_held_type+0x9f/0x120 [ 33.444698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.445350] ? mtree_range_walk+0x632/0x900 [ 33.445971] ? mas_walk+0x5c7/0x7c0 [ 33.446475] do_vmi_munmap+0x1f1/0x2b0 [ 33.447005] mmap_region+0x1f9/0x2660 [ 33.447533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.448087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.448852] ? __pfx_lock_acquire+0x10/0x10 [ 33.449414] ? __pfx_mmap_region+0x10/0x10 [ 33.449983] ? security_mmap_addr+0x7d/0xa0 [ 33.450536] ? get_unmapped_area+0x1f5/0x3f0 [ 33.451122] do_mmap+0x854/0xf00 [ 33.451598] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.452133] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.452739] ksys_mmap_pgoff+0x3af/0x500 [ 33.453279] do_syscall_64+0x3f/0x90 [ 33.453796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.454472] RIP: 0033:0x7f1b5d99bd82 [ 33.454958] 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 [ 33.457207] RSP: 002b:00007ffcf6392b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.458181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b5d99bd82 [ 33.459090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b5cdd5000 [ 33.459992] RBP: 00007f1b5cdd5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.460890] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564078d90b20 [ 33.461803] R13: 00007ffcf6392bb0 R14: 00007ffcf6392be0 R15: 00007ffcf6392f40 [ 33.462710] [ 33.463019] [ 33.463248] Allocated by task 212: [ 33.463697] kasan_save_stack+0x22/0x50 [ 33.464235] kasan_set_track+0x25/0x30 [ 33.464763] __kasan_slab_alloc+0x59/0x70 [ 33.465324] kmem_cache_alloc+0x16b/0x370 [ 33.465878] vm_area_dup+0x20/0x160 [ 33.466355] __split_vma+0x170/0x950 [ 33.466850] split_vma+0xc6/0x110 [ 33.467315] mprotect_fixup+0x8d2/0xb30 [ 33.467857] do_mprotect_pkey+0x87e/0xd40 [ 33.468413] __x64_sys_mprotect+0x78/0xc0 [ 33.468966] do_syscall_64+0x3f/0x90 [ 33.469471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.470170] [ 33.470401] Freed by task 13: [ 33.470811] kasan_save_stack+0x22/0x50 [ 33.471345] kasan_set_track+0x25/0x30 [ 33.471874] kasan_save_free_info+0x2b/0x50 [ 33.472442] __kasan_slab_free+0x10a/0x190 [ 33.473014] kmem_cache_free+0x10d/0x4d0 [ 33.473646] rcu_core+0x8c8/0x2860 [ 33.474122] __do_softirq+0x1b7/0x7d4 [ 33.474628] [ 33.474858] Last potentially related work creation: [ 33.475472] kasan_save_stack+0x22/0x50 [ 33.476011] __kasan_record_aux_stack+0x8e/0xa0 [ 33.476620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.477310] remove_vma+0x139/0x170 [ 33.477808] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.478405] do_vmi_munmap+0x1f1/0x2b0 [ 33.478926] __vm_munmap+0x138/0x3a0 [ 33.479431] __x64_sys_munmap+0x59/0x80 [ 33.479963] do_syscall_64+0x3f/0x90 [ 33.480466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.481144] [ 33.481377] The buggy address belongs to the object at ffff88800e1f2bc8 [ 33.481377] which belongs to the cache vm_area_struct of size 168 [ 33.482947] The buggy address is located 88 bytes inside of [ 33.482947] freed 168-byte region [ffff88800e1f2bc8, ffff88800e1f2c70) [ 33.484440] [ 33.484673] The buggy address belongs to the physical page: [ 33.485382] page:0000000059bf0538 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f2 [ 33.486533] memcg:ffff88800d581501 [ 33.486989] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.487681] page_type: 0xffffffff() [ 33.488163] raw: 0100000000000200 ffff88800879fc80 ffffea0000390d00 dead000000000006 [ 33.489135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d581501 [ 33.490122] page dumped because: kasan: bad access detected [ 33.490824] [ 33.491053] Memory state around the buggy address: [ 33.491669] ffff88800e1f2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.492577] ffff88800e1f2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.493487] >ffff88800e1f2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.494402] ^ [ 33.494966] ffff88800e1f2c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.495864] ffff88800e1f2d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.496764] ================================================================== [ 33.497925] Disabling lock debugging due to kernel taint [ 35.565147] BUG: Bad rss-counter state mm:000000008d47d976 type:MM_FILEPAGES val:33 [ 35.566525] BUG: Bad rss-counter state mm:000000008d47d976 type:MM_ANONPAGES val:22 [ 35.989897] BUG: Bad rss-counter state mm:0000000048a307d6 type:MM_FILEPAGES val:33 [ 35.990749] BUG: Bad rss-counter state mm:0000000048a307d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42691' (ECDSA) to the list of known hosts. 2023/06/19 15:59:21 fuzzer started 2023/06/19 15:59:21 dialing manager at localhost:44161 2023/06/19 15:59:21 checking machine... 2023/06/19 15:59:21 checking revisions... [ 36.736117] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:59:22 testing simple program... [ 36.788271] cgroup: Unknown subsys name 'net' [ 36.825370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000051 RCX=ffffffff818a7c95 RDX=ffff888018d0d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800fd2fac8 RSP=ffff88800fd2fa80 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800d56b301 R11=0000000000000001 R12=ffff88800fd2fb20 R13=ffff88800d56b301 R14=ffffed1001fa5f6b R15=ffffed1001fa5f6e RIP=ffffffff814c01fc 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 00007fbf65459900 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=00007fbf65a0e650 CR3=000000000f26a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8618eba4 RBX=ffffffff85e36e64 RCX=ffffffff81c5f454 RDX=0000000000000000 RSI=ffffffff8618eb74 RDI=ffffffff85e36e44 RBP=ffffffff85e36e68 RSP=ffff88806cf099e0 R8 =ffffffff8618eb74 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000002f69c R12=ffffffff85e36e64 R13=ffffffff85e36e44 R14=0000000000000008 R15=dffffc0000000000 RIP=ffffffff8112fcb3 RFL=00000212 [----A--] 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 00007f172193b700 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=00007f5818b53500 CR3=0000000006a4c000 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=2031323a39353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000