syzkaller login: [ 89.645970] sshd (211) used greatest stack depth: 23992 bytes left [ 89.647165] BUG: Bad rss-counter state mm:0000000076695c24 type:MM_FILEPAGES val:33 [ 89.648666] BUG: Bad rss-counter state mm:0000000076695c24 type:MM_ANONPAGES val:22 [ 89.812285] ================================================================== [ 89.813195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.814155] Read of size 8 at addr ffff88800d594ed8 by task sshd/218 [ 89.814932] [ 89.815231] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 89.816261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.817236] Call Trace: [ 89.817567] [ 89.817855] dump_stack_lvl+0x91/0xf0 [ 89.818349] print_report+0xcc/0x620 [ 89.818857] ? __virt_addr_valid+0x102/0x340 [ 89.819412] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.820024] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.820646] kasan_report+0xbe/0xf0 [ 89.821126] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.821749] vma_interval_tree_remove+0xc75/0xec0 [ 89.822348] vma_prepare+0xc54/0x11a0 [ 89.822830] __split_vma+0x5af/0x950 [ 89.823299] ? __pfx___split_vma+0x10/0x10 [ 89.823829] ? find_held_lock+0x2c/0x110 [ 89.824347] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.824912] ? lock_is_held_type+0x9f/0x120 [ 89.825442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.826042] ? mtree_range_walk+0x632/0x900 [ 89.826602] ? mas_walk+0x5c7/0x7c0 [ 89.827075] do_vmi_munmap+0x1f1/0x2b0 [ 89.827567] mmap_region+0x1f9/0x2660 [ 89.828049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.828553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.829261] ? __pfx_lock_acquire+0x10/0x10 [ 89.829800] ? __pfx_mmap_region+0x10/0x10 [ 89.830325] ? security_mmap_addr+0x7d/0xa0 [ 89.830858] ? get_unmapped_area+0x1f5/0x3f0 [ 89.831405] do_mmap+0x854/0xf00 [ 89.831839] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.832331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.832889] ksys_mmap_pgoff+0x3af/0x500 [ 89.833389] do_syscall_64+0x3f/0x90 [ 89.833861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.834519] RIP: 0033:0x7fb15680bd82 [ 89.834979] 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 [ 89.837088] RSP: 002b:00007ffff6cfddc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.837988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb15680bd82 [ 89.838832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb155c45000 [ 89.839665] RBP: 00007fb155c45000 R08: 0000000000000009 R09: 0000000000001000 [ 89.840505] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd56614d90 [ 89.841342] R13: 00007ffff6cfdde0 R14: 00007ffff6cfde10 R15: 00007ffff6cfe170 [ 89.842187] [ 89.842493] [ 89.842713] Allocated by task 211: [ 89.843138] kasan_save_stack+0x22/0x50 [ 89.843649] kasan_set_track+0x25/0x30 [ 89.844141] __kasan_slab_alloc+0x59/0x70 [ 89.844662] kmem_cache_alloc+0x16b/0x370 [ 89.845172] vm_area_dup+0x20/0x160 [ 89.845625] __split_vma+0x170/0x950 [ 89.846085] split_vma+0xc6/0x110 [ 89.846541] mprotect_fixup+0x8d2/0xb30 [ 89.847037] do_mprotect_pkey+0x87e/0xd40 [ 89.847557] __x64_sys_mprotect+0x78/0xc0 [ 89.848076] do_syscall_64+0x3f/0x90 [ 89.848545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.849179] [ 89.849391] Freed by task 211: [ 89.849782] kasan_save_stack+0x22/0x50 [ 89.850287] kasan_set_track+0x25/0x30 [ 89.850783] kasan_save_free_info+0x2b/0x50 [ 89.851314] __kasan_slab_free+0x10a/0x190 [ 89.851845] kmem_cache_free+0x10d/0x4d0 [ 89.852351] rcu_core+0x8c8/0x2860 [ 89.852795] __do_softirq+0x1b7/0x7d4 [ 89.853268] [ 89.853480] Last potentially related work creation: [ 89.854055] kasan_save_stack+0x22/0x50 [ 89.854575] __kasan_record_aux_stack+0x8e/0xa0 [ 89.855144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.855780] remove_vma+0x139/0x170 [ 89.856231] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.856784] do_vmi_munmap+0x1f1/0x2b0 [ 89.857271] __vm_munmap+0x138/0x3a0 [ 89.857745] __x64_sys_munmap+0x59/0x80 [ 89.858234] do_syscall_64+0x3f/0x90 [ 89.858714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.859347] [ 89.859563] Second to last potentially related work creation: [ 89.860235] kasan_save_stack+0x22/0x50 [ 89.860732] __kasan_record_aux_stack+0x8e/0xa0 [ 89.861305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.861937] remove_vma+0x139/0x170 [ 89.862394] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.862957] do_vmi_munmap+0x1f1/0x2b0 [ 89.863436] mmap_region+0x1f9/0x2660 [ 89.863908] do_mmap+0x854/0xf00 [ 89.864333] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.864821] ksys_mmap_pgoff+0x7d/0x500 [ 89.865311] do_syscall_64+0x3f/0x90 [ 89.865780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.866413] [ 89.866642] The buggy address belongs to the object at ffff88800d594e80 [ 89.866642] which belongs to the cache vm_area_struct of size 168 [ 89.868097] The buggy address is located 88 bytes inside of [ 89.868097] freed 168-byte region [ffff88800d594e80, ffff88800d594f28) [ 89.869497] [ 89.869710] The buggy address belongs to the physical page: [ 89.870360] page:00000000de3f257c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd594 [ 89.871463] memcg:ffff88800eb00001 [ 89.871887] flags: 0x100000000000200(slab|node=0|zone=1) [ 89.872536] page_type: 0xffffffff() [ 89.872984] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 89.873908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb00001 [ 89.874858] page dumped because: kasan: bad access detected [ 89.875525] [ 89.875741] Memory state around the buggy address: [ 89.876327] ffff88800d594d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.877196] ffff88800d594e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 89.878073] >ffff88800d594e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.878941] ^ [ 89.879686] ffff88800d594f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 89.880558] ffff88800d594f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 89.881413] ================================================================== [ 89.882386] Disabling lock debugging due to kernel taint [ 91.804181] BUG: Bad rss-counter state mm:00000000b788b336 type:MM_FILEPAGES val:33 [ 91.804976] BUG: Bad rss-counter state mm:00000000b788b336 type:MM_ANONPAGES val:22 [ 92.249675] BUG: Bad rss-counter state mm:000000008564d60f type:MM_FILEPAGES val:33 [ 92.250892] BUG: Bad rss-counter state mm:000000008564d60f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45946' (ECDSA) to the list of known hosts. 2023/06/19 11:19:23 fuzzer started 2023/06/19 11:19:23 dialing manager at localhost:44161 2023/06/19 11:19:24 checking machine... 2023/06/19 11:19:24 checking revisions... [ 92.904458] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:19:24 testing simple program... [ 92.944267] cgroup: Unknown subsys name 'net' [ 92.992593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:18:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007f0f3bd1d477 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=00007f0f3bd1d477 RBP=00007f0f3bd1d477 RSP=ffff88806ce09a30 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f0f3bd1d000 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880161e51c0 R15=ffff88800cbde410 RIP=ffffffff813a0a6b RFL=00000202 [-------] 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 00007f0f3b82a900 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=00007f0f3bde20b0 CR3=000000000e70e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffd35489fe8 CR3=000000000c6c4000 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=2033323a39313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a39313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000