syzkaller login: [ 31.032382] BUG: Bad rss-counter state mm:00000000d7cfbc9e type:MM_FILEPAGES val:33 [ 31.033728] BUG: Bad rss-counter state mm:00000000d7cfbc9e type:MM_ANONPAGES val:22 [ 31.073720] ================================================================== [ 31.074656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.075695] Read of size 8 at addr ffff88800e0a2140 by task sshd/219 [ 31.076464] [ 31.076683] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.077590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.078550] Call Trace: [ 31.078870] [ 31.079154] dump_stack_lvl+0x91/0xf0 [ 31.079645] print_report+0xcc/0x620 [ 31.080125] ? __virt_addr_valid+0x102/0x340 [ 31.080674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081912] kasan_report+0xbe/0xf0 [ 31.082384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.083002] vma_interval_tree_remove+0xc75/0xec0 [ 31.083605] vma_prepare+0xc54/0x11a0 [ 31.084084] __split_vma+0x5af/0x950 [ 31.084560] ? __pfx___split_vma+0x10/0x10 [ 31.085093] ? find_held_lock+0x2c/0x110 [ 31.085616] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.086188] ? lock_is_held_type+0x9f/0x120 [ 31.086731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.087335] ? mtree_range_walk+0x632/0x900 [ 31.087885] ? mas_walk+0x5c7/0x7c0 [ 31.088361] do_vmi_munmap+0x1f1/0x2b0 [ 31.088869] mmap_region+0x1f9/0x2660 [ 31.089350] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.089859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.090570] ? __pfx_lock_acquire+0x10/0x10 [ 31.091100] ? __pfx_mmap_region+0x10/0x10 [ 31.091634] ? security_mmap_addr+0x7d/0xa0 [ 31.092162] ? get_unmapped_area+0x1f5/0x3f0 [ 31.092712] do_mmap+0x854/0xf00 [ 31.093159] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.093652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.094211] ksys_mmap_pgoff+0x3af/0x500 [ 31.094719] do_syscall_64+0x3f/0x90 [ 31.095195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095847] RIP: 0033:0x7f298db2ed82 [ 31.096302] 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 [ 31.098447] RSP: 002b:00007ffcf1f29d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.099398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f298db2ed82 [ 31.100248] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f298cf68000 [ 31.101228] RBP: 00007f298cf68000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102088] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592904f3b20 [ 31.102949] R13: 00007ffcf1f29d70 R14: 00007ffcf1f29da0 R15: 00007ffcf1f2a100 [ 31.103807] [ 31.104107] [ 31.104321] Allocated by task 212: [ 31.104752] kasan_save_stack+0x22/0x50 [ 31.105276] kasan_set_track+0x25/0x30 [ 31.105767] __kasan_slab_alloc+0x59/0x70 [ 31.106296] kmem_cache_alloc+0x16b/0x370 [ 31.106819] vm_area_dup+0x20/0x160 [ 31.107271] __split_vma+0x170/0x950 [ 31.107741] split_vma+0xc6/0x110 [ 31.108183] mprotect_fixup+0x8d2/0xb30 [ 31.108695] do_mprotect_pkey+0x87e/0xd40 [ 31.109223] __x64_sys_mprotect+0x78/0xc0 [ 31.109743] do_syscall_64+0x3f/0x90 [ 31.110216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.110883] [ 31.111101] Freed by task 212: [ 31.111489] kasan_save_stack+0x22/0x50 [ 31.111989] kasan_set_track+0x25/0x30 [ 31.112481] kasan_save_free_info+0x2b/0x50 [ 31.113036] __kasan_slab_free+0x10a/0x190 [ 31.113568] kmem_cache_free+0x10d/0x4d0 [ 31.114069] rcu_core+0x8c8/0x2860 [ 31.114510] __do_softirq+0x1b7/0x7d4 [ 31.114984] [ 31.115197] Last potentially related work creation: [ 31.115777] kasan_save_stack+0x22/0x50 [ 31.116280] __kasan_record_aux_stack+0x8e/0xa0 [ 31.116870] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.117512] remove_vma+0x139/0x170 [ 31.117984] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.118545] do_vmi_munmap+0x1f1/0x2b0 [ 31.119027] __vm_munmap+0x138/0x3a0 [ 31.119494] __x64_sys_munmap+0x59/0x80 [ 31.119998] do_syscall_64+0x3f/0x90 [ 31.120478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121124] [ 31.121341] Second to last potentially related work creation: [ 31.122034] kasan_save_stack+0x22/0x50 [ 31.122550] __kasan_record_aux_stack+0x8e/0xa0 [ 31.123120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.123764] remove_vma+0x139/0x170 [ 31.124208] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.124764] do_vmi_munmap+0x1f1/0x2b0 [ 31.125252] mmap_region+0x1f9/0x2660 [ 31.125736] do_mmap+0x854/0xf00 [ 31.126165] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.126652] ksys_mmap_pgoff+0x7d/0x500 [ 31.127150] do_syscall_64+0x3f/0x90 [ 31.127627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.128272] [ 31.128492] The buggy address belongs to the object at ffff88800e0a20e8 [ 31.128492] which belongs to the cache vm_area_struct of size 168 [ 31.129985] The buggy address is located 88 bytes inside of [ 31.129985] freed 168-byte region [ffff88800e0a20e8, ffff88800e0a2190) [ 31.131387] [ 31.131603] The buggy address belongs to the physical page: [ 31.132281] page:000000003f394549 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a2 [ 31.133412] memcg:ffff88800d885d01 [ 31.133868] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.134561] page_type: 0xffffffff() [ 31.135037] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b900 dead000000000006 [ 31.136046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d885d01 [ 31.137038] page dumped because: kasan: bad access detected [ 31.137746] [ 31.137969] Memory state around the buggy address: [ 31.138582] ffff88800e0a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.139489] ffff88800e0a2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.140408] >ffff88800e0a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.141332] ^ [ 31.142012] ffff88800e0a2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.142925] ffff88800e0a2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.143834] ================================================================== [ 31.145131] Disabling lock debugging due to kernel taint [ 33.250913] BUG: Bad rss-counter state mm:0000000058aa3e3c type:MM_FILEPAGES val:33 [ 33.252088] BUG: Bad rss-counter state mm:0000000058aa3e3c type:MM_ANONPAGES val:22 [ 33.712561] BUG: Bad rss-counter state mm:000000009600f260 type:MM_FILEPAGES val:33 [ 33.713585] BUG: Bad rss-counter state mm:000000009600f260 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18825' (ECDSA) to the list of known hosts. 2023/06/21 01:38:00 fuzzer started 2023/06/21 01:38:00 dialing manager at localhost:36067 2023/06/21 01:38:00 checking machine... 2023/06/21 01:38:00 checking revisions... [ 34.423521] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:38:00 testing simple program... [ 34.482143] cgroup: Unknown subsys name 'net' [ 34.530681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:00 Registers: info registers vcpu 0 RAX=1ffff11002bc7169 RBX=ffff888015e38b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888015e38b48 RBP=ffff888019e9d798 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13a9 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019e41b40 R14=ffffffff8117fdd9 R15=ffff88800eb76500 RIP=ffffffff818464e2 RFL=00000046 [---Z-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 00007f06b8cb0900 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=00007f06b80ede30 CR3=000000000c94c000 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=819fc9e5d3f351b2c14f5bc23f36f33c XMM02=000000000011a8b8eff9b2d0a8fce9cb XMM03=000000000011a9882c67c8bc2e329bc3 XMM04=4a5bd9f31a4d14da00000000000ae988 XMM05=14d34e4fdd9835140000000000133fe0 XMM06=dfcdbad4f1609c370000000000132e78 XMM07=fb795ef6d65770560000000000121a58 XMM08=2c67c8bc2e329bc3000000000011a928 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888016871b40 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff11002061f2f RSP=ffff88801030f968 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=dffffc0000000000 RIP=ffffffff812d86d9 RFL=00000246 [---Z-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 00007fa5a56b4900 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=00007ffd389a2000 CR3=000000000f074000 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=6720646572637465733a4d41503d706f 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