syzkaller login: [ 44.412666] BUG: Bad rss-counter state mm:000000007a6c7935 type:MM_FILEPAGES val:33 [ 44.413916] BUG: Bad rss-counter state mm:000000007a6c7935 type:MM_ANONPAGES val:22 [ 44.452555] ================================================================== [ 44.453765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.455018] Read of size 8 at addr ffff888019c226b0 by task sshd/218 [ 44.455952] [ 44.456214] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.457268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.458487] Call Trace: [ 44.458877] [ 44.459218] dump_stack_lvl+0x91/0xf0 [ 44.459805] print_report+0xcc/0x620 [ 44.460377] ? __virt_addr_valid+0x102/0x340 [ 44.461026] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.461758] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.462522] kasan_report+0xbe/0xf0 [ 44.463087] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.463824] vma_interval_tree_remove+0xc75/0xec0 [ 44.464549] vma_prepare+0xc54/0x11a0 [ 44.465135] __split_vma+0x5af/0x950 [ 44.465698] ? __pfx___split_vma+0x10/0x10 [ 44.466326] ? find_held_lock+0x2c/0x110 [ 44.466964] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.467545] ? lock_is_held_type+0x9f/0x120 [ 44.468049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.468646] ? mtree_range_walk+0x632/0x900 [ 44.469161] ? mas_walk+0x5c7/0x7c0 [ 44.469615] do_vmi_munmap+0x1f1/0x2b0 [ 44.470079] mmap_region+0x1f9/0x2660 [ 44.470549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.471032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.471698] ? __pfx_lock_acquire+0x10/0x10 [ 44.472195] ? __pfx_mmap_region+0x10/0x10 [ 44.472695] ? security_mmap_addr+0x7d/0xa0 [ 44.473189] ? get_unmapped_area+0x1f5/0x3f0 [ 44.473714] do_mmap+0x854/0xf00 [ 44.474127] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.474599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.475131] ksys_mmap_pgoff+0x3af/0x500 [ 44.475617] do_syscall_64+0x3f/0x90 [ 44.476072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.476680] RIP: 0033:0x7f73ba66ed82 [ 44.477113] 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 [ 44.479210] RSP: 002b:00007ffd655e8468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.480115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73ba66ed82 [ 44.480961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73b9aa8000 [ 44.481806] RBP: 00007f73b9aa8000 R08: 0000000000000009 R09: 0000000000001000 [ 44.482677] R10: 0000000000000812 R11: 0000000000000206 R12: 000056503d758ec0 [ 44.483521] R13: 00007ffd655e8480 R14: 00007ffd655e84b0 R15: 00007ffd655e8810 [ 44.484380] [ 44.484668] [ 44.484879] Allocated by task 211: [ 44.485300] kasan_save_stack+0x22/0x50 [ 44.485804] kasan_set_track+0x25/0x30 [ 44.486283] __kasan_slab_alloc+0x59/0x70 [ 44.486807] kmem_cache_alloc+0x16b/0x370 [ 44.487328] vm_area_dup+0x20/0x160 [ 44.487783] __split_vma+0x170/0x950 [ 44.488239] split_vma+0xc6/0x110 [ 44.488667] mprotect_fixup+0x8d2/0xb30 [ 44.489167] do_mprotect_pkey+0x87e/0xd40 [ 44.489683] __x64_sys_mprotect+0x78/0xc0 [ 44.490195] do_syscall_64+0x3f/0x90 [ 44.490679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.491306] [ 44.491515] Freed by task 19: [ 44.491901] kasan_save_stack+0x22/0x50 [ 44.492401] kasan_set_track+0x25/0x30 [ 44.492879] kasan_save_free_info+0x2b/0x50 [ 44.493413] __kasan_slab_free+0x10a/0x190 [ 44.493943] kmem_cache_free+0x10d/0x4d0 [ 44.494442] rcu_core+0x8c8/0x2860 [ 44.494877] __do_softirq+0x1b7/0x7d4 [ 44.495355] [ 44.495572] Last potentially related work creation: [ 44.496151] kasan_save_stack+0x22/0x50 [ 44.496651] __kasan_record_aux_stack+0x8e/0xa0 [ 44.497209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.497839] remove_vma+0x139/0x170 [ 44.498291] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.498852] do_vmi_munmap+0x1f1/0x2b0 [ 44.499339] __vm_munmap+0x138/0x3a0 [ 44.499805] __x64_sys_munmap+0x59/0x80 [ 44.500294] do_syscall_64+0x3f/0x90 [ 44.500758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.501397] [ 44.501612] The buggy address belongs to the object at ffff888019c22658 [ 44.501612] which belongs to the cache vm_area_struct of size 168 [ 44.503070] The buggy address is located 88 bytes inside of [ 44.503070] freed 168-byte region [ffff888019c22658, ffff888019c22700) [ 44.504467] [ 44.504685] The buggy address belongs to the physical page: [ 44.505343] page:000000006572f879 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c22 [ 44.506427] memcg:ffff88801834dc01 [ 44.506847] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.507491] page_type: 0xffffffff() [ 44.507934] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.508851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801834dc01 [ 44.509756] page dumped because: kasan: bad access detected [ 44.510415] [ 44.510629] Memory state around the buggy address: [ 44.511206] ffff888019c22580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.512065] ffff888019c22600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.512911] >ffff888019c22680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.513750] ^ [ 44.514328] ffff888019c22700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.515177] ffff888019c22780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.516027] ================================================================== [ 44.517096] Disabling lock debugging due to kernel taint [ 46.558851] BUG: Bad rss-counter state mm:000000000bea261b type:MM_FILEPAGES val:33 [ 46.559717] BUG: Bad rss-counter state mm:000000000bea261b type:MM_ANONPAGES val:22 [ 47.066962] BUG: Bad rss-counter state mm:000000003f788ce2 type:MM_FILEPAGES val:33 [ 47.068137] BUG: Bad rss-counter state mm:000000003f788ce2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14486' (ECDSA) to the list of known hosts. 2023/06/19 21:34:09 fuzzer started 2023/06/19 21:34:09 dialing manager at localhost:44161 2023/06/19 21:34:09 checking machine... 2023/06/19 21:34:09 checking revisions... [ 47.816439] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:34:10 testing simple program... [ 47.864592] cgroup: Unknown subsys name 'net' [ 47.920401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:33:48 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff888019ddd8d0 RCX=ffffffff81370c98 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce3a2c0 RBP=0000000000000200 RSP=ffff888008d7fcc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81370d04 RFL=00000086 [--S--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 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=00007fbeb3433360 CR3=000000000f37a000 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=573f2ac5fb75f39d4b40fad484536a75 XMM02=000000000011c6a0eff9b2d0a8fce9cb XMM03=000000000011c7702c67c8bc2e329bc3 XMM04=1e142485f5342ed100000000000ae988 XMM05=0c8e256bdf48263300000000001345a0 XMM06=3dd6eb54ef8d13ac0000000000132fd0 XMM07=fb795ef6d65770560000000000123598 XMM08=2c67c8bc2e329bc3000000000011c710 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000002 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888016809f34 RBP=ffff888016809b40 RSP=ffff888016257d00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=0000000000000000 R11=0000000000000001 R12=ffff888016809b40 R13=ffff88800da36a00 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff813744bd 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 00007f7ec5972900 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=00007fffde6e0000 CR3=000000000d136000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000