syzkaller login: [ 33.708720] BUG: Bad rss-counter state mm:0000000031e91796 type:MM_FILEPAGES val:33 [ 33.710079] BUG: Bad rss-counter state mm:0000000031e91796 type:MM_ANONPAGES val:22 [ 33.752827] ================================================================== [ 33.753910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.755048] Read of size 8 at addr ffff88800e613058 by task sshd/221 [ 33.755867] [ 33.756102] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.757032] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.758091] Call Trace: [ 33.758447] [ 33.758769] dump_stack_lvl+0x91/0xf0 [ 33.759317] print_report+0xcc/0x620 [ 33.759864] ? __virt_addr_valid+0x102/0x340 [ 33.760467] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.761135] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.761795] kasan_report+0xbe/0xf0 [ 33.762308] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.762975] vma_interval_tree_remove+0xc75/0xec0 [ 33.763643] vma_prepare+0xc54/0x11a0 [ 33.764166] __split_vma+0x5af/0x950 [ 33.764684] ? __pfx___split_vma+0x10/0x10 [ 33.765259] ? find_held_lock+0x2c/0x110 [ 33.765821] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.766435] ? lock_is_held_type+0x9f/0x120 [ 33.767040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.767702] ? mtree_range_walk+0x632/0x900 [ 33.768300] ? mas_walk+0x5c7/0x7c0 [ 33.768815] do_vmi_munmap+0x1f1/0x2b0 [ 33.769353] mmap_region+0x1f9/0x2660 [ 33.769875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.770432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.771218] ? __pfx_lock_acquire+0x10/0x10 [ 33.771798] ? __pfx_mmap_region+0x10/0x10 [ 33.772371] ? security_mmap_addr+0x7d/0xa0 [ 33.772953] ? get_unmapped_area+0x1f5/0x3f0 [ 33.773553] do_mmap+0x854/0xf00 [ 33.774027] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.774567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.775193] ksys_mmap_pgoff+0x3af/0x500 [ 33.775747] do_syscall_64+0x3f/0x90 [ 33.776267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.776967] RIP: 0033:0x7fef76662d82 [ 33.777463] 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 [ 33.779783] RSP: 002b:00007ffc5af58c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.780766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef76662d82 [ 33.781690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef75a9c000 [ 33.782613] RBP: 00007fef75a9c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.783555] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8a31a0ec0 [ 33.784474] R13: 00007ffc5af58c20 R14: 00007ffc5af58c50 R15: 00007ffc5af58fb0 [ 33.785414] [ 33.785733] [ 33.785962] Allocated by task 214: [ 33.786435] kasan_save_stack+0x22/0x50 [ 33.786980] kasan_set_track+0x25/0x30 [ 33.787520] __kasan_slab_alloc+0x59/0x70 [ 33.788083] kmem_cache_alloc+0x16b/0x370 [ 33.788633] vm_area_dup+0x20/0x160 [ 33.789117] __split_vma+0x170/0x950 [ 33.789617] split_vma+0xc6/0x110 [ 33.790087] mprotect_fixup+0x8d2/0xb30 [ 33.790621] do_mprotect_pkey+0x87e/0xd40 [ 33.791192] __x64_sys_mprotect+0x78/0xc0 [ 33.791758] do_syscall_64+0x3f/0x90 [ 33.792268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.792958] [ 33.793188] Freed by task 214: [ 33.793606] kasan_save_stack+0x22/0x50 [ 33.794144] kasan_set_track+0x25/0x30 [ 33.794676] kasan_save_free_info+0x2b/0x50 [ 33.795280] __kasan_slab_free+0x10a/0x190 [ 33.795858] kmem_cache_free+0x10d/0x4d0 [ 33.796408] rcu_core+0x8c8/0x2860 [ 33.796885] __do_softirq+0x1b7/0x7d4 [ 33.797406] [ 33.797640] Last potentially related work creation: [ 33.798277] kasan_save_stack+0x22/0x50 [ 33.798820] __kasan_record_aux_stack+0x8e/0xa0 [ 33.799461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.800154] remove_vma+0x139/0x170 [ 33.800641] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.801248] do_vmi_munmap+0x1f1/0x2b0 [ 33.801780] __vm_munmap+0x138/0x3a0 [ 33.802296] __x64_sys_munmap+0x59/0x80 [ 33.802836] do_syscall_64+0x3f/0x90 [ 33.803373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.804072] [ 33.804307] Second to last potentially related work creation: [ 33.805054] kasan_save_stack+0x22/0x50 [ 33.805605] __kasan_record_aux_stack+0x8e/0xa0 [ 33.806235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.806940] remove_vma+0x139/0x170 [ 33.807449] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.808059] do_vmi_munmap+0x1f1/0x2b0 [ 33.808595] mmap_region+0x1f9/0x2660 [ 33.809116] do_mmap+0x854/0xf00 [ 33.809588] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.810123] ksys_mmap_pgoff+0x3af/0x500 [ 33.810674] do_syscall_64+0x3f/0x90 [ 33.811195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.811899] [ 33.812135] The buggy address belongs to the object at ffff88800e613000 [ 33.812135] which belongs to the cache vm_area_struct of size 168 [ 33.813734] The buggy address is located 88 bytes inside of [ 33.813734] freed 168-byte region [ffff88800e613000, ffff88800e6130a8) [ 33.815287] [ 33.815526] The buggy address belongs to the physical page: [ 33.816244] page:00000000e05db6ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe613 [ 33.817432] memcg:ffff88800d3cf501 [ 33.817898] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.818654] page_type: 0xffffffff() [ 33.819151] raw: 0100000000000200 ffff88800879fc80 ffffea000050fbc0 dead000000000009 [ 33.820153] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3cf501 [ 33.821147] page dumped because: kasan: bad access detected [ 33.821871] [ 33.822105] Memory state around the buggy address: [ 33.822735] ffff88800e612f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.823689] ffff88800e612f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.824617] >ffff88800e613000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.825546] ^ [ 33.826333] ffff88800e613080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.827279] ffff88800e613100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.828206] ================================================================== [ 33.829329] Disabling lock debugging due to kernel taint [ 35.799461] BUG: Bad rss-counter state mm:00000000d37e5918 type:MM_FILEPAGES val:33 [ 35.800627] BUG: Bad rss-counter state mm:00000000d37e5918 type:MM_ANONPAGES val:22 [ 36.281386] BUG: Bad rss-counter state mm:0000000020050f34 type:MM_FILEPAGES val:33 [ 36.282594] BUG: Bad rss-counter state mm:0000000020050f34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50555' (ECDSA) to the list of known hosts. 2023/06/20 06:39:34 fuzzer started 2023/06/20 06:39:34 dialing manager at localhost:44161 2023/06/20 06:39:34 checking machine... 2023/06/20 06:39:34 checking revisions... [ 36.890253] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:39:34 testing simple program... [ 36.935733] cgroup: Unknown subsys name 'net' [ 36.973802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:39:31 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=1ffff1100d9c139f RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806ce09cc8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8180eef9 RFL=00000016 [----AP-] 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 00007f895e1a8900 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=00007fff64387000 CR3=000000000e4ac000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5c4a5a9b80 CR3=00000000102e6000 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=2033333a39333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000