syzkaller login: [ 33.242434] BUG: Bad rss-counter state mm:0000000039f417b1 type:MM_FILEPAGES val:33 [ 33.243427] BUG: Bad rss-counter state mm:0000000039f417b1 type:MM_ANONPAGES val:22 [ 33.406241] ================================================================== [ 33.407141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.408077] Read of size 8 at addr ffff88800e1956b0 by task sshd/219 [ 33.408862] [ 33.409084] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.410048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.411047] Call Trace: [ 33.411367] [ 33.411652] dump_stack_lvl+0x91/0xf0 [ 33.412147] print_report+0xcc/0x620 [ 33.412631] ? __virt_addr_valid+0x102/0x340 [ 33.413189] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.413835] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.414456] kasan_report+0xbe/0xf0 [ 33.414936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.415567] vma_interval_tree_remove+0xc75/0xec0 [ 33.416168] vma_prepare+0xc54/0x11a0 [ 33.416657] __split_vma+0x5af/0x950 [ 33.417129] ? __pfx___split_vma+0x10/0x10 [ 33.417663] ? find_held_lock+0x2c/0x110 [ 33.418182] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.418745] ? lock_is_held_type+0x9f/0x120 [ 33.419285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.419893] ? mtree_range_walk+0x632/0x900 [ 33.420447] ? mas_walk+0x5c7/0x7c0 [ 33.420919] do_vmi_munmap+0x1f1/0x2b0 [ 33.421409] mmap_region+0x1f9/0x2660 [ 33.421907] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.422417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.423136] ? __pfx_lock_acquire+0x10/0x10 [ 33.423662] ? __pfx_mmap_region+0x10/0x10 [ 33.424190] ? security_mmap_addr+0x7d/0xa0 [ 33.424722] ? get_unmapped_area+0x1f5/0x3f0 [ 33.425272] do_mmap+0x854/0xf00 [ 33.425716] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.426211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.426776] ksys_mmap_pgoff+0x3af/0x500 [ 33.427282] do_syscall_64+0x3f/0x90 [ 33.427758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.428401] RIP: 0033:0x7f0ec8abed82 [ 33.428858] 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 [ 33.430985] RSP: 002b:00007ffe1934a858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.431896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ec8abed82 [ 33.432734] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ec7ef8000 [ 33.433590] RBP: 00007f0ec7ef8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.434440] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adfce7b980 [ 33.435282] R13: 00007ffe1934a870 R14: 00007ffe1934a8a0 R15: 00007ffe1934ac00 [ 33.436135] [ 33.436427] [ 33.436642] Allocated by task 212: [ 33.437067] kasan_save_stack+0x22/0x50 [ 33.437594] kasan_set_track+0x25/0x30 [ 33.438087] __kasan_slab_alloc+0x59/0x70 [ 33.438614] kmem_cache_alloc+0x16b/0x370 [ 33.439130] vm_area_dup+0x20/0x160 [ 33.439586] __split_vma+0x170/0x950 [ 33.440046] split_vma+0xc6/0x110 [ 33.440486] mprotect_fixup+0x8d2/0xb30 [ 33.440985] do_mprotect_pkey+0x87e/0xd40 [ 33.441520] __x64_sys_mprotect+0x78/0xc0 [ 33.442036] do_syscall_64+0x3f/0x90 [ 33.442504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.443143] [ 33.443357] Freed by task 212: [ 33.443751] kasan_save_stack+0x22/0x50 [ 33.444247] kasan_set_track+0x25/0x30 [ 33.444744] kasan_save_free_info+0x2b/0x50 [ 33.445270] __kasan_slab_free+0x10a/0x190 [ 33.445820] kmem_cache_free+0x10d/0x4d0 [ 33.446325] rcu_core+0x8c8/0x2860 [ 33.446774] __do_softirq+0x1b7/0x7d4 [ 33.447247] [ 33.447461] Last potentially related work creation: [ 33.448049] kasan_save_stack+0x22/0x50 [ 33.448553] __kasan_record_aux_stack+0x8e/0xa0 [ 33.449129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.449811] remove_vma+0x139/0x170 [ 33.450260] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.450816] do_vmi_munmap+0x1f1/0x2b0 [ 33.451300] __vm_munmap+0x138/0x3a0 [ 33.451763] __x64_sys_munmap+0x59/0x80 [ 33.452254] do_syscall_64+0x3f/0x90 [ 33.452726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.453363] [ 33.453586] The buggy address belongs to the object at ffff88800e195658 [ 33.453586] which belongs to the cache vm_area_struct of size 168 [ 33.455053] The buggy address is located 88 bytes inside of [ 33.455053] freed 168-byte region [ffff88800e195658, ffff88800e195700) [ 33.456467] [ 33.456681] The buggy address belongs to the physical page: [ 33.457336] page:00000000b207590e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe195 [ 33.458433] memcg:ffff88800e0e9801 [ 33.458856] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.459501] page_type: 0xffffffff() [ 33.459954] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.460874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0e9801 [ 33.461785] page dumped because: kasan: bad access detected [ 33.462453] [ 33.462668] Memory state around the buggy address: [ 33.463246] ffff88800e195580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.464101] ffff88800e195600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.464955] >ffff88800e195680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.465811] ^ [ 33.466390] ffff88800e195700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.467242] ffff88800e195780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.468093] ================================================================== [ 33.469051] Disabling lock debugging due to kernel taint [ 35.689453] BUG: Bad rss-counter state mm:00000000df378587 type:MM_FILEPAGES val:33 [ 35.690459] BUG: Bad rss-counter state mm:00000000df378587 type:MM_ANONPAGES val:22 [ 36.228311] BUG: Bad rss-counter state mm:0000000073674b13 type:MM_FILEPAGES val:33 [ 36.229538] BUG: Bad rss-counter state mm:0000000073674b13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26388' (ECDSA) to the list of known hosts. 2023/06/20 06:03:27 fuzzer started 2023/06/20 06:03:27 dialing manager at localhost:44161 2023/06/20 06:03:27 checking machine... 2023/06/20 06:03:27 checking revisions... [ 36.830758] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:27 testing simple program... [ 36.880070] cgroup: Unknown subsys name 'net' [ 36.925163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:24 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=ffff888008c58000 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=00007f9621548030 CR3=0000000013a34000 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=b7c471978efc09a55041307b6ced8411 XMM02=000000000011e670ec2efd57dc4c00df XMM03=000000000012500035563bda7095f5f0 XMM04=3170814ed249735700000000000ae988 XMM05=dfcdbad4f1609c370000000000134b90 XMM06=657dd51cd437bac100000000001339f8 XMM07=e042d86d42eb936e0000000000125280 XMM08=35563bda7095f5f0000000000011e6d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801063d898 RCX=0000000000000000 RDX=1ffff110020c7b14 RSI=ffffffff81f31855 RDI=ffff88801063d8a0 RBP=00000000000002f0 RSP=ffff888009b4fa30 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=0000000000000000 R12=ffff88800f9b1008 R13=ffff888009b4fc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f3186e RFL=00000216 [----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 00007f0592095900 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=00007ffc0d0d1000 CR3=000000001c9fe000 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