syzkaller login: [ 38.704437] BUG: Bad rss-counter state mm:00000000cd9b54be type:MM_FILEPAGES val:33 [ 38.706538] BUG: Bad rss-counter state mm:00000000cd9b54be type:MM_ANONPAGES val:22 [ 38.889207] ================================================================== [ 38.890126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.891094] Read of size 8 at addr ffff88800ee206b0 by task sshd/219 [ 38.891860] [ 38.892074] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.893079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.894098] Call Trace: [ 38.894436] <TASK> [ 38.894720] dump_stack_lvl+0x91/0xf0 [ 38.895221] print_report+0xcc/0x620 [ 38.895703] ? __virt_addr_valid+0x102/0x340 [ 38.896268] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896895] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897525] kasan_report+0xbe/0xf0 [ 38.898004] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898650] vma_interval_tree_remove+0xc75/0xec0 [ 38.899250] vma_prepare+0xc54/0x11a0 [ 38.899729] __split_vma+0x5af/0x950 [ 38.900200] ? __pfx___split_vma+0x10/0x10 [ 38.900728] ? find_held_lock+0x2c/0x110 [ 38.901254] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.901819] ? lock_is_held_type+0x9f/0x120 [ 38.902377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.902988] ? mtree_range_walk+0x632/0x900 [ 38.903545] ? mas_walk+0x5c7/0x7c0 [ 38.904021] do_vmi_munmap+0x1f1/0x2b0 [ 38.904518] mmap_region+0x1f9/0x2660 [ 38.905001] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.905517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.906237] ? __pfx_lock_acquire+0x10/0x10 [ 38.906778] ? __pfx_mmap_region+0x10/0x10 [ 38.907311] ? security_mmap_addr+0x7d/0xa0 [ 38.907844] ? get_unmapped_area+0x1f5/0x3f0 [ 38.908398] do_mmap+0x854/0xf00 [ 38.908832] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.909321] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.909881] ksys_mmap_pgoff+0x3af/0x500 [ 38.910410] do_syscall_64+0x3f/0x90 [ 38.910896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911550] RIP: 0033:0x7fd148cbfd82 [ 38.912006] 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 [ 38.914157] RSP: 002b:00007fff0f9c2348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.915091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd148cbfd82 [ 38.915940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1480f9000 [ 38.916784] RBP: 00007fd1480f9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.917638] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563ae348d90 [ 38.918491] R13: 00007fff0f9c2360 R14: 00007fff0f9c2390 R15: 00007fff0f9c26f0 [ 38.919351] </TASK> [ 38.919647] [ 38.919866] Allocated by task 212: [ 38.920295] kasan_save_stack+0x22/0x50 [ 38.920805] kasan_set_track+0x25/0x30 [ 38.921313] __kasan_slab_alloc+0x59/0x70 [ 38.921845] kmem_cache_alloc+0x16b/0x370 [ 38.922379] vm_area_dup+0x20/0x160 [ 38.922835] __split_vma+0x170/0x950 [ 38.923303] split_vma+0xc6/0x110 [ 38.923740] mprotect_fixup+0x8d2/0xb30 [ 38.924236] do_mprotect_pkey+0x87e/0xd40 [ 38.924753] __x64_sys_mprotect+0x78/0xc0 [ 38.925269] do_syscall_64+0x3f/0x90 [ 38.925752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926400] [ 38.926619] Freed by task 212: [ 38.927012] kasan_save_stack+0x22/0x50 [ 38.927515] kasan_set_track+0x25/0x30 [ 38.928003] kasan_save_free_info+0x2b/0x50 [ 38.928534] __kasan_slab_free+0x10a/0x190 [ 38.929069] kmem_cache_free+0x10d/0x4d0 [ 38.929574] rcu_core+0x8c8/0x2860 [ 38.930016] __do_softirq+0x1b7/0x7d4 [ 38.930502] [ 38.930722] Last potentially related work creation: [ 38.931304] kasan_save_stack+0x22/0x50 [ 38.931799] __kasan_record_aux_stack+0x8e/0xa0 [ 38.932365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.933000] remove_vma+0x139/0x170 [ 38.933499] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.934053] do_vmi_munmap+0x1f1/0x2b0 [ 38.934553] __vm_munmap+0x138/0x3a0 [ 38.935024] __x64_sys_munmap+0x59/0x80 [ 38.935523] do_syscall_64+0x3f/0x90 [ 38.936104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936728] [ 38.936939] Second to last potentially related work creation: [ 38.937609] kasan_save_stack+0x22/0x50 [ 38.938103] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.939298] remove_vma+0x139/0x170 [ 38.939745] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.940287] do_vmi_munmap+0x1f1/0x2b0 [ 38.940765] mmap_region+0x1f9/0x2660 [ 38.941231] do_mmap+0x854/0xf00 [ 38.941652] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.942131] ksys_mmap_pgoff+0x7d/0x500 [ 38.942628] do_syscall_64+0x3f/0x90 [ 38.943099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943729] [ 38.943941] The buggy address belongs to the object at ffff88800ee20658 [ 38.943941] which belongs to the cache vm_area_struct of size 168 [ 38.945380] The buggy address is located 88 bytes inside of [ 38.945380] freed 168-byte region [ffff88800ee20658, ffff88800ee20700) [ 38.946768] [ 38.946976] The buggy address belongs to the physical page: [ 38.947613] page:000000001b628390 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee20 [ 38.948655] memcg:ffff88800ee1d201 [ 38.949063] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.949682] page_type: 0xffffffff() [ 38.950118] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c7200 dead000000000004 [ 38.951007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1d201 [ 38.951879] page dumped because: kasan: bad access detected [ 38.952517] [ 38.952727] Memory state around the buggy address: [ 38.953285] ffff88800ee20580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.954104] ffff88800ee20600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.954947] >ffff88800ee20680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.955773] ^ [ 38.956334] ffff88800ee20700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.957164] ffff88800ee20780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.957989] ================================================================== [ 38.958885] Disabling lock debugging due to kernel taint [ 41.305383] BUG: Bad rss-counter state mm:0000000001911aab type:MM_FILEPAGES val:33 [ 41.306568] BUG: Bad rss-counter state mm:0000000001911aab type:MM_ANONPAGES val:22 [ 41.691382] BUG: Bad rss-counter state mm:000000002a79cb70 type:MM_FILEPAGES val:33 [ 41.692720] BUG: Bad rss-counter state mm:000000002a79cb70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39655' (ECDSA) to the list of known hosts. 2023/06/20 12:04:26 fuzzer started 2023/06/20 12:04:26 dialing manager at localhost:36067 2023/06/20 12:04:26 checking machine... 2023/06/20 12:04:26 checking revisions... [ 42.386311] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:04:26 testing simple program... [ 42.442386] cgroup: Unknown subsys name 'net' [ 42.499979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:26 Registers: info registers vcpu 0 RAX=1ffffffff0c96405 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b202e RBP=ffff8880103bf860 RSP=ffff8880103bf798 R8 =ffffffff864b2030 R9 =ffff8880103bf848 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880103bf868 R13=ffff8880103bf850 R14=ffff8880103bff58 R15=ffff8880103bf808 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f7584dd2900 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=00007f7585387650 CR3=000000000e4c6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ffc02613e48 CR3=0000000005482000 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=00007f70d2697510000055c8c30c4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000