syzkaller login: [ 45.904424] BUG: Bad rss-counter state mm:00000000d3f3af0c type:MM_FILEPAGES val:33 [ 45.905983] BUG: Bad rss-counter state mm:00000000d3f3af0c type:MM_ANONPAGES val:22 [ 46.071467] ================================================================== [ 46.072589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.073704] Read of size 8 at addr ffff88800c69dc20 by task sshd/220 [ 46.074689] [ 46.074952] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.075830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.076816] Call Trace: [ 46.077136] [ 46.077420] dump_stack_lvl+0x91/0xf0 [ 46.077910] print_report+0xcc/0x620 [ 46.078396] ? __virt_addr_valid+0x102/0x340 [ 46.078956] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.079569] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.080197] kasan_report+0xbe/0xf0 [ 46.080675] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.081309] vma_interval_tree_remove+0xc75/0xec0 [ 46.081908] vma_prepare+0xc54/0x11a0 [ 46.082396] __split_vma+0x5af/0x950 [ 46.082878] ? __pfx___split_vma+0x10/0x10 [ 46.083417] ? find_held_lock+0x2c/0x110 [ 46.083952] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.084560] ? lock_is_held_type+0x9f/0x120 [ 46.085103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.085718] ? mtree_range_walk+0x632/0x900 [ 46.086280] ? mas_walk+0x5c7/0x7c0 [ 46.086758] do_vmi_munmap+0x1f1/0x2b0 [ 46.087271] mmap_region+0x1f9/0x2660 [ 46.087762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.088279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.089008] ? __pfx_lock_acquire+0x10/0x10 [ 46.089547] ? __pfx_mmap_region+0x10/0x10 [ 46.090090] ? security_mmap_addr+0x7d/0xa0 [ 46.090636] ? get_unmapped_area+0x1f5/0x3f0 [ 46.091204] do_mmap+0x854/0xf00 [ 46.091651] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.092175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.092751] ksys_mmap_pgoff+0x3af/0x500 [ 46.093264] do_syscall_64+0x3f/0x90 [ 46.093750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.094417] RIP: 0033:0x7f1bc07cbd82 [ 46.094892] 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 [ 46.097092] RSP: 002b:00007fffab5c20c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.098021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bc07cbd82 [ 46.098887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bbfc05000 [ 46.099775] RBP: 00007f1bbfc05000 R08: 0000000000000009 R09: 0000000000001000 [ 46.100634] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e56eaa6980 [ 46.101511] R13: 00007fffab5c20e0 R14: 00007fffab5c2110 R15: 00007fffab5c2470 [ 46.102385] [ 46.102685] [ 46.102907] Allocated by task 213: [ 46.103351] kasan_save_stack+0x22/0x50 [ 46.103853] kasan_set_track+0x25/0x30 [ 46.104384] __kasan_slab_alloc+0x59/0x70 [ 46.104931] kmem_cache_alloc+0x16b/0x370 [ 46.105468] vm_area_dup+0x20/0x160 [ 46.105935] __split_vma+0x170/0x950 [ 46.106422] split_vma+0xc6/0x110 [ 46.106872] mprotect_fixup+0x8d2/0xb30 [ 46.107382] do_mprotect_pkey+0x87e/0xd40 [ 46.107916] __x64_sys_mprotect+0x78/0xc0 [ 46.108464] do_syscall_64+0x3f/0x90 [ 46.108947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.109617] [ 46.109845] Freed by task 213: [ 46.110256] kasan_save_stack+0x22/0x50 [ 46.110774] kasan_set_track+0x25/0x30 [ 46.111277] kasan_save_free_info+0x2b/0x50 [ 46.111817] __kasan_slab_free+0x10a/0x190 [ 46.112387] kmem_cache_free+0x10d/0x4d0 [ 46.112907] rcu_core+0x8c8/0x2860 [ 46.113363] __do_softirq+0x1b7/0x7d4 [ 46.113855] [ 46.114081] Last potentially related work creation: [ 46.114690] kasan_save_stack+0x22/0x50 [ 46.115208] __kasan_record_aux_stack+0x8e/0xa0 [ 46.115802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.116475] remove_vma+0x139/0x170 [ 46.116947] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.117528] do_vmi_munmap+0x1f1/0x2b0 [ 46.118036] __vm_munmap+0x138/0x3a0 [ 46.118525] __x64_sys_munmap+0x59/0x80 [ 46.119034] do_syscall_64+0x3f/0x90 [ 46.119510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.120171] [ 46.120388] The buggy address belongs to the object at ffff88800c69dbc8 [ 46.120388] which belongs to the cache vm_area_struct of size 168 [ 46.121881] The buggy address is located 88 bytes inside of [ 46.121881] freed 168-byte region [ffff88800c69dbc8, ffff88800c69dc70) [ 46.123307] [ 46.123524] The buggy address belongs to the physical page: [ 46.124210] page:000000006c12b0ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc69d [ 46.125332] memcg:ffff888013f22d01 [ 46.125758] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.126420] page_type: 0xffffffff() [ 46.126879] raw: 0100000000000200 ffff88800879fc80 ffffea000035d600 dead000000000008 [ 46.127842] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f22d01 [ 46.128765] page dumped because: kasan: bad access detected [ 46.129448] [ 46.129674] Memory state around the buggy address: [ 46.130273] ffff88800c69db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.131149] ffff88800c69db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 46.132045] >ffff88800c69dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 46.132925] ^ [ 46.133474] ffff88800c69dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 46.134359] ffff88800c69dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 46.135246] ================================================================== [ 46.136296] Disabling lock debugging due to kernel taint [ 47.924386] BUG: Bad rss-counter state mm:00000000375ee46e type:MM_FILEPAGES val:33 [ 47.925423] BUG: Bad rss-counter state mm:00000000375ee46e type:MM_ANONPAGES val:22 [ 48.390220] BUG: Bad rss-counter state mm:00000000bbf767e9 type:MM_FILEPAGES val:33 [ 48.391418] BUG: Bad rss-counter state mm:00000000bbf767e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15387' (ECDSA) to the list of known hosts. 2023/06/19 20:57:24 fuzzer started 2023/06/19 20:57:24 dialing manager at localhost:44161 2023/06/19 20:57:24 checking machine... 2023/06/19 20:57:24 checking revisions... [ 49.088881] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:24 testing simple program... [ 49.136986] cgroup: Unknown subsys name 'net' [ 49.182611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:08 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=00007f3b4b8659a0 CR3=0000000016a46000 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=2034323a37353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880097bb200 RCX=ffffffff818466bf RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff8452fd53 RBP=ffff88800ff5a390 RSP=ffff8880168ff9d8 R8 =0000000000000000 R9 =ffffed1001feb484 R10=ffff88800ff5a423 R11=00000000000b6996 R12=0000000000000202 R13=ffff88800ff5a3d0 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff8153432b RFL=00000006 [-----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 00007f03e8721900 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=00007f03e86e6008 CR3=000000000eab4000 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