syzkaller login: [ 24.280902] BUG: Bad rss-counter state mm:000000001a7031db type:MM_FILEPAGES val:33 [ 24.282146] BUG: Bad rss-counter state mm:000000001a7031db type:MM_ANONPAGES val:22 [ 24.443299] ================================================================== [ 24.444396] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.445511] Read of size 8 at addr ffff88800eaf0a50 by task sshd/220 [ 24.446465] [ 24.446684] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.447549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.448542] Call Trace: [ 24.448863] [ 24.449148] dump_stack_lvl+0x91/0xf0 [ 24.449636] print_report+0xcc/0x620 [ 24.450128] ? __virt_addr_valid+0x102/0x340 [ 24.450689] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.451315] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.451934] kasan_report+0xbe/0xf0 [ 24.452416] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.453037] vma_interval_tree_remove+0xc75/0xec0 [ 24.453641] vma_prepare+0xc54/0x11a0 [ 24.454143] __split_vma+0x5af/0x950 [ 24.454621] ? __pfx___split_vma+0x10/0x10 [ 24.455153] ? find_held_lock+0x2c/0x110 [ 24.455674] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.456236] ? lock_is_held_type+0x9f/0x120 [ 24.456772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.457384] ? mtree_range_walk+0x632/0x900 [ 24.457937] ? mas_walk+0x5c7/0x7c0 [ 24.458428] do_vmi_munmap+0x1f1/0x2b0 [ 24.458930] mmap_region+0x1f9/0x2660 [ 24.459418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.459929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.460643] ? __pfx_lock_acquire+0x10/0x10 [ 24.461184] ? __pfx_mmap_region+0x10/0x10 [ 24.461720] ? security_mmap_addr+0x7d/0xa0 [ 24.462282] ? get_unmapped_area+0x1f5/0x3f0 [ 24.462835] do_mmap+0x854/0xf00 [ 24.463282] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.463788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.464357] ksys_mmap_pgoff+0x3af/0x500 [ 24.464862] do_syscall_64+0x3f/0x90 [ 24.465341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.466008] RIP: 0033:0x7f7689410d82 [ 24.466476] 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 [ 24.468605] RSP: 002b:00007ffdb9a088b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.469501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7689410d82 [ 24.470355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f768884a000 [ 24.471204] RBP: 00007f768884a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.472051] R10: 0000000000000812 R11: 0000000000000206 R12: 000056061ee07b20 [ 24.472894] R13: 00007ffdb9a088d0 R14: 00007ffdb9a08900 R15: 00007ffdb9a08c60 [ 24.473755] [ 24.474071] [ 24.474287] Allocated by task 213: [ 24.474717] kasan_save_stack+0x22/0x50 [ 24.475222] kasan_set_track+0x25/0x30 [ 24.475721] __kasan_slab_alloc+0x59/0x70 [ 24.476264] kmem_cache_alloc+0x16b/0x370 [ 24.476791] vm_area_dup+0x20/0x160 [ 24.477257] __split_vma+0x170/0x950 [ 24.477724] split_vma+0xc6/0x110 [ 24.478178] mprotect_fixup+0x8d2/0xb30 [ 24.478682] do_mprotect_pkey+0x87e/0xd40 [ 24.479208] __x64_sys_mprotect+0x78/0xc0 [ 24.479732] do_syscall_64+0x3f/0x90 [ 24.480210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.480857] [ 24.481074] Freed by task 213: [ 24.481465] kasan_save_stack+0x22/0x50 [ 24.481975] kasan_set_track+0x25/0x30 [ 24.482490] kasan_save_free_info+0x2b/0x50 [ 24.483028] __kasan_slab_free+0x10a/0x190 [ 24.483563] kmem_cache_free+0x10d/0x4d0 [ 24.484074] rcu_core+0x8c8/0x2860 [ 24.484530] __do_softirq+0x1b7/0x7d4 [ 24.485009] [ 24.485234] Last potentially related work creation: [ 24.485825] kasan_save_stack+0x22/0x50 [ 24.486339] __kasan_record_aux_stack+0x8e/0xa0 [ 24.486911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.487564] remove_vma+0x139/0x170 [ 24.488016] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.488569] do_vmi_munmap+0x1f1/0x2b0 [ 24.489056] __vm_munmap+0x138/0x3a0 [ 24.489528] __x64_sys_munmap+0x59/0x80 [ 24.490039] do_syscall_64+0x3f/0x90 [ 24.490510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.491165] [ 24.491391] Second to last potentially related work creation: [ 24.492075] kasan_save_stack+0x22/0x50 [ 24.492582] __kasan_record_aux_stack+0x8e/0xa0 [ 24.493154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.493799] remove_vma+0x139/0x170 [ 24.494271] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.494828] do_vmi_munmap+0x1f1/0x2b0 [ 24.495325] mmap_region+0x1f9/0x2660 [ 24.495800] do_mmap+0x854/0xf00 [ 24.496239] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.496729] ksys_mmap_pgoff+0x3af/0x500 [ 24.497233] do_syscall_64+0x3f/0x90 [ 24.497709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.498376] [ 24.498596] The buggy address belongs to the object at ffff88800eaf09f8 [ 24.498596] which belongs to the cache vm_area_struct of size 168 [ 24.500065] The buggy address is located 88 bytes inside of [ 24.500065] freed 168-byte region [ffff88800eaf09f8, ffff88800eaf0aa0) [ 24.501462] [ 24.501677] The buggy address belongs to the physical page: [ 24.502351] page:0000000002b64039 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf0 [ 24.503417] memcg:ffff888013b56a01 [ 24.503843] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.504540] page_type: 0xffffffff() [ 24.504993] raw: 0100000000000200 ffff88800879fc80 ffffea000037f400 dead000000000007 [ 24.505910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b56a01 [ 24.506827] page dumped because: kasan: bad access detected [ 24.507484] [ 24.507705] Memory state around the buggy address: [ 24.508282] ffff88800eaf0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.509136] ffff88800eaf0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.510010] >ffff88800eaf0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.510874] ^ [ 24.511583] ffff88800eaf0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.512447] ffff88800eaf0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.513301] ================================================================== [ 24.514294] Disabling lock debugging due to kernel taint [ 26.381557] BUG: Bad rss-counter state mm:00000000bc00a7d9 type:MM_FILEPAGES val:33 [ 26.382489] BUG: Bad rss-counter state mm:00000000bc00a7d9 type:MM_ANONPAGES val:22 [ 26.854506] BUG: Bad rss-counter state mm:0000000090bba561 type:MM_FILEPAGES val:33 [ 26.855823] BUG: Bad rss-counter state mm:0000000090bba561 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45375' (ECDSA) to the list of known hosts. 2023/06/20 06:11:37 fuzzer started 2023/06/20 06:11:37 dialing manager at localhost:44161 2023/06/20 06:11:37 checking machine... 2023/06/20 06:11:37 checking revisions... [ 27.537860] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:11:38 testing simple program... [ 27.586390] cgroup: Unknown subsys name 'net' [ 27.634977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff27be9508 CR3=0000000005482000 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=00007fba1eee851000005621105d9790 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 info registers vcpu 1 RAX=0000000000000000 RBX=139997807ff5a442 RCX=00007fd0ab75e880 RDX=000000000000003c RSI=0000562db69dfae0 RDI=00007fd0ab75e8c0 RBP=000000000000003c RSP=00007fff094a9218 R8 =000000000000007c R9 =0000000000125880 R10=0000000000000002 R11=000000000052545f R12=0000562db69dfae0 R13=00007fff094a9258 R14=0000562db69e6290 R15=00007fff094a9260 RIP=00007fd0acb750e9 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd0ac24e900 00000000 00000000 GS =0000 0000000000000000 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=00007fc224773650 CR3=0000000014126000 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=ffffffffffffffffffffffffffffffff XMM01=00000000000000003033323d4449505f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=35b2d446deffd26c00000000000ae988 XMM05=c6424921167ab2470000000000136268 XMM06=c0eaf140fb7967320000000000134c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000