syzkaller login: [ 31.267471] BUG: Bad rss-counter state mm:00000000e86cd701 type:MM_FILEPAGES val:33 [ 31.269539] BUG: Bad rss-counter state mm:00000000e86cd701 type:MM_ANONPAGES val:22 [ 31.453746] ================================================================== [ 31.454653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.455737] Read of size 8 at addr ffff88800e5534e0 by task sshd/220 [ 31.456630] [ 31.456917] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.458031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.459294] Call Trace: [ 31.459701] [ 31.460073] dump_stack_lvl+0x91/0xf0 [ 31.460711] print_report+0xcc/0x620 [ 31.461340] ? __virt_addr_valid+0x102/0x340 [ 31.462037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.462660] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463278] kasan_report+0xbe/0xf0 [ 31.463764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.464382] vma_interval_tree_remove+0xc75/0xec0 [ 31.465007] vma_prepare+0xc54/0x11a0 [ 31.465490] __split_vma+0x5af/0x950 [ 31.465976] ? __pfx___split_vma+0x10/0x10 [ 31.466512] ? find_held_lock+0x2c/0x110 [ 31.467047] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.467620] ? lock_is_held_type+0x9f/0x120 [ 31.468170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.468823] ? mtree_range_walk+0x632/0x900 [ 31.469391] ? mas_walk+0x5c7/0x7c0 [ 31.469879] do_vmi_munmap+0x1f1/0x2b0 [ 31.470376] mmap_region+0x1f9/0x2660 [ 31.470866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.471390] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.472105] ? __pfx_lock_acquire+0x10/0x10 [ 31.472667] ? __pfx_mmap_region+0x10/0x10 [ 31.473207] ? security_mmap_addr+0x7d/0xa0 [ 31.473750] ? get_unmapped_area+0x1f5/0x3f0 [ 31.474329] do_mmap+0x854/0xf00 [ 31.474772] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.475268] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.475838] ksys_mmap_pgoff+0x3af/0x500 [ 31.476346] do_syscall_64+0x3f/0x90 [ 31.476833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.477488] RIP: 0033:0x7fe6c521ed82 [ 31.477961] 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 [ 31.480117] RSP: 002b:00007ffe3a094c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.481059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6c521ed82 [ 31.481929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6c4658000 [ 31.482802] RBP: 00007fe6c4658000 R08: 0000000000000009 R09: 0000000000001000 [ 31.483664] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566dbe6fec0 [ 31.484540] R13: 00007ffe3a094cb0 R14: 00007ffe3a094ce0 R15: 00007ffe3a095040 [ 31.485410] [ 31.485708] [ 31.485923] Allocated by task 213: [ 31.486358] kasan_save_stack+0x22/0x50 [ 31.486874] kasan_set_track+0x25/0x30 [ 31.487386] __kasan_slab_alloc+0x59/0x70 [ 31.487930] kmem_cache_alloc+0x16b/0x370 [ 31.488463] vm_area_dup+0x20/0x160 [ 31.488925] __split_vma+0x170/0x950 [ 31.489399] split_vma+0xc6/0x110 [ 31.489844] mprotect_fixup+0x8d2/0xb30 [ 31.490364] do_mprotect_pkey+0x87e/0xd40 [ 31.490891] __x64_sys_mprotect+0x78/0xc0 [ 31.491411] do_syscall_64+0x3f/0x90 [ 31.491887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.492557] [ 31.492777] Freed by task 213: [ 31.493168] kasan_save_stack+0x22/0x50 [ 31.493679] kasan_set_track+0x25/0x30 [ 31.494174] kasan_save_free_info+0x2b/0x50 [ 31.494713] __kasan_slab_free+0x10a/0x190 [ 31.495260] kmem_cache_free+0x10d/0x4d0 [ 31.495774] rcu_core+0x8c8/0x2860 [ 31.496224] __do_softirq+0x1b7/0x7d4 [ 31.496715] [ 31.496930] Last potentially related work creation: [ 31.497530] kasan_save_stack+0x22/0x50 [ 31.498033] __kasan_record_aux_stack+0x8e/0xa0 [ 31.498604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.499250] remove_vma+0x139/0x170 [ 31.499705] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.500273] do_vmi_munmap+0x1f1/0x2b0 [ 31.500780] __vm_munmap+0x138/0x3a0 [ 31.501257] __x64_sys_munmap+0x59/0x80 [ 31.501768] do_syscall_64+0x3f/0x90 [ 31.502242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.502894] [ 31.503110] Second to last potentially related work creation: [ 31.503801] kasan_save_stack+0x22/0x50 [ 31.504300] __kasan_record_aux_stack+0x8e/0xa0 [ 31.504887] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.505537] remove_vma+0x139/0x170 [ 31.505987] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.506559] do_vmi_munmap+0x1f1/0x2b0 [ 31.507052] __vm_munmap+0x138/0x3a0 [ 31.507522] __x64_sys_munmap+0x59/0x80 [ 31.508017] do_syscall_64+0x3f/0x90 [ 31.508509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.509159] [ 31.509373] The buggy address belongs to the object at ffff88800e553488 [ 31.509373] which belongs to the cache vm_area_struct of size 168 [ 31.510852] The buggy address is located 88 bytes inside of [ 31.510852] freed 168-byte region [ffff88800e553488, ffff88800e553530) [ 31.512274] [ 31.512502] The buggy address belongs to the physical page: [ 31.513173] page:000000006d3e3ace refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe553 [ 31.514259] memcg:ffff88800e748d01 [ 31.514685] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.515348] page_type: 0xffffffff() [ 31.515796] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b740 dead000000000002 [ 31.516725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e748d01 [ 31.517646] page dumped because: kasan: bad access detected [ 31.518316] [ 31.518536] Memory state around the buggy address: [ 31.519115] ffff88800e553380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.519977] ffff88800e553400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.520859] >ffff88800e553480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.521727] ^ [ 31.522486] ffff88800e553500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.523344] ffff88800e553580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.524197] ================================================================== [ 31.525252] Disabling lock debugging due to kernel taint [ 33.590169] BUG: Bad rss-counter state mm:00000000b4da72c4 type:MM_FILEPAGES val:33 [ 33.591371] BUG: Bad rss-counter state mm:00000000b4da72c4 type:MM_ANONPAGES val:22 [ 34.048812] BUG: Bad rss-counter state mm:000000009801381f type:MM_FILEPAGES val:33 [ 34.050004] BUG: Bad rss-counter state mm:000000009801381f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58081' (ECDSA) to the list of known hosts. 2023/06/20 12:51:02 fuzzer started 2023/06/20 12:51:02 dialing manager at localhost:36067 2023/06/20 12:51:02 checking machine... 2023/06/20 12:51:02 checking revisions... [ 34.682293] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:51:02 testing simple program... [ 34.732854] cgroup: Unknown subsys name 'net' [ 34.772818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:01 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88800c53f3b0 RDX=1ffff110018a7e6d RSI=ffffffff813ad720 RDI=ffff88800c53f3d8 RBP=ffff88800c53f3a8 RSP=ffff88800c53f308 R8 =0000000000000001 R9 =ffff88800c53f350 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800c53f3d8 R13=0000000000000000 R14=ffff88800f4ad1c0 R15=ffff88800d517720 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007ff5acb2f900 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=00007ffc933eb000 CR3=000000000fb7a000 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=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=00007f3e1c0dca90 CR3=00000000145d4000 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=c5d8981e2c3a399c114b67a83305dad1 XMM02=000000000011b208eff9b2d0a8fce9cb XMM03=000000000011b2d82c67c8bc2e329bc3 XMM04=beb5d32e99e1332400000000000ae988 XMM05=19e9129bd510f2350000000000133640 XMM06=bc57407957f1692700000000001324a8 XMM07=e042d86d42eb936e00000000001229d8 XMM08=4be822c6c5ad8ed5000000000011b2d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000