syzkaller login: [ 32.639085] BUG: Bad rss-counter state mm:0000000009b5fd25 type:MM_FILEPAGES val:33 [ 32.640377] BUG: Bad rss-counter state mm:0000000009b5fd25 type:MM_ANONPAGES val:22 [ 32.674879] ================================================================== [ 32.675573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.676322] Read of size 8 at addr ffff88800f007a50 by task sshd/221 [ 32.676920] [ 32.677091] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.677766] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.678527] Call Trace: [ 32.678774] [ 32.678995] dump_stack_lvl+0x91/0xf0 [ 32.679377] print_report+0xcc/0x620 [ 32.679756] ? __virt_addr_valid+0x102/0x340 [ 32.680194] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.680678] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.681158] kasan_report+0xbe/0xf0 [ 32.681522] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.681996] vma_interval_tree_remove+0xc75/0xec0 [ 32.682463] vma_prepare+0xc54/0x11a0 [ 32.682836] __split_vma+0x5af/0x950 [ 32.683207] ? __pfx___split_vma+0x10/0x10 [ 32.683608] ? find_held_lock+0x2c/0x110 [ 32.684034] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.684472] ? lock_is_held_type+0x9f/0x120 [ 32.684881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.685250] ? mtree_range_walk+0x632/0x900 [ 32.685553] ? mas_walk+0x5c7/0x7c0 [ 32.685811] do_vmi_munmap+0x1f1/0x2b0 [ 32.686079] mmap_region+0x1f9/0x2660 [ 32.686340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.686623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.687014] ? __pfx_lock_acquire+0x10/0x10 [ 32.687305] ? __pfx_mmap_region+0x10/0x10 [ 32.687597] ? security_mmap_addr+0x7d/0xa0 [ 32.687889] ? get_unmapped_area+0x1f5/0x3f0 [ 32.688198] do_mmap+0x854/0xf00 [ 32.688441] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.688709] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.689016] ksys_mmap_pgoff+0x3af/0x500 [ 32.689290] do_syscall_64+0x3f/0x90 [ 32.689551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.689903] RIP: 0033:0x7f10ff66fd82 [ 32.690158] 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 [ 32.691328] RSP: 002b:00007ffff3ea57a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.691820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10ff66fd82 [ 32.692290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10feaa9000 [ 32.692753] RBP: 00007f10feaa9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.693208] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561fce68ec0 [ 32.693672] R13: 00007ffff3ea57c0 R14: 00007ffff3ea57f0 R15: 00007ffff3ea5b50 [ 32.694138] [ 32.694296] [ 32.694417] Allocated by task 214: [ 32.694651] kasan_save_stack+0x22/0x50 [ 32.694929] kasan_set_track+0x25/0x30 [ 32.695201] __kasan_slab_alloc+0x59/0x70 [ 32.695486] kmem_cache_alloc+0x16b/0x370 [ 32.695766] vm_area_dup+0x20/0x160 [ 32.696027] __split_vma+0x170/0x950 [ 32.696281] split_vma+0xc6/0x110 [ 32.696519] mprotect_fixup+0x8d2/0xb30 [ 32.696794] do_mprotect_pkey+0x87e/0xd40 [ 32.697086] __x64_sys_mprotect+0x78/0xc0 [ 32.697369] do_syscall_64+0x3f/0x90 [ 32.697623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.697966] [ 32.698084] Freed by task 19: [ 32.698291] kasan_save_stack+0x22/0x50 [ 32.698564] kasan_set_track+0x25/0x30 [ 32.698833] kasan_save_free_info+0x2b/0x50 [ 32.699123] __kasan_slab_free+0x10a/0x190 [ 32.699415] kmem_cache_free+0x10d/0x4d0 [ 32.699754] rcu_core+0x8c8/0x2860 [ 32.700070] __do_softirq+0x1b7/0x7d4 [ 32.700428] [ 32.700583] Last potentially related work creation: [ 32.700903] kasan_save_stack+0x22/0x50 [ 32.701177] __kasan_record_aux_stack+0x8e/0xa0 [ 32.701488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.701839] remove_vma+0x139/0x170 [ 32.702086] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.702391] do_vmi_munmap+0x1f1/0x2b0 [ 32.702660] __vm_munmap+0x138/0x3a0 [ 32.702914] __x64_sys_munmap+0x59/0x80 [ 32.703185] do_syscall_64+0x3f/0x90 [ 32.703445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.703796] [ 32.703925] Second to last potentially related work creation: [ 32.704301] kasan_save_stack+0x22/0x50 [ 32.704578] __kasan_record_aux_stack+0x8e/0xa0 [ 32.704890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.705239] remove_vma+0x139/0x170 [ 32.705485] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.705794] do_vmi_munmap+0x1f1/0x2b0 [ 32.706057] mmap_region+0x1f9/0x2660 [ 32.706318] do_mmap+0x854/0xf00 [ 32.706551] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.706817] ksys_mmap_pgoff+0x3af/0x500 [ 32.707092] do_syscall_64+0x3f/0x90 [ 32.707356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.707705] [ 32.707823] The buggy address belongs to the object at ffff88800f0079f8 [ 32.707823] which belongs to the cache vm_area_struct of size 168 [ 32.708623] The buggy address is located 88 bytes inside of [ 32.708623] freed 168-byte region [ffff88800f0079f8, ffff88800f007aa0) [ 32.709380] [ 32.709497] The buggy address belongs to the physical page: [ 32.709852] page:0000000085d227ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf007 [ 32.710440] memcg:ffff88800f785f01 [ 32.710673] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.711060] page_type: 0xffffffff() [ 32.711309] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.711806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f785f01 [ 32.712305] page dumped because: kasan: bad access detected [ 32.712663] [ 32.712779] Memory state around the buggy address: [ 32.713097] ffff88800f007900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.713568] ffff88800f007980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.714040] >ffff88800f007a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.714502] ^ [ 32.714885] ffff88800f007a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.715354] ffff88800f007b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.715818] ================================================================== [ 32.716511] Disabling lock debugging due to kernel taint [ 34.850232] BUG: Bad rss-counter state mm:0000000074001ad4 type:MM_FILEPAGES val:33 [ 34.851398] BUG: Bad rss-counter state mm:0000000074001ad4 type:MM_ANONPAGES val:22 [ 35.248947] BUG: Bad rss-counter state mm:00000000dbb89ed6 type:MM_FILEPAGES val:33 [ 35.250405] BUG: Bad rss-counter state mm:00000000dbb89ed6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20021' (ECDSA) to the list of known hosts. 2023/06/19 11:03:03 fuzzer started 2023/06/19 11:03:03 dialing manager at localhost:44161 2023/06/19 11:03:03 checking machine... 2023/06/19 11:03:03 checking revisions... [ 36.005264] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:03:03 testing simple program... [ 36.058091] cgroup: Unknown subsys name 'net' [ 36.119435] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:01 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=00007f4e2d3148c0 CR3=0000000016b6e000 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=2033303a33303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a33303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed1001fa3d81 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800fd1ebf8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8fe1 RFL=00000286 [--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 00007fb31cbba900 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=00007fb31cb99020 CR3=000000000eba8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000