syzkaller login: [ 32.558139] BUG: Bad rss-counter state mm:000000009cb29bdb type:MM_FILEPAGES val:33 [ 32.559152] BUG: Bad rss-counter state mm:000000009cb29bdb type:MM_ANONPAGES val:22 [ 32.715337] ================================================================== [ 32.716425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.717519] Read of size 8 at addr ffff8880158dd140 by task sshd/220 [ 32.718619] [ 32.718852] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.719718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.720715] Call Trace: [ 32.721033] [ 32.721318] dump_stack_lvl+0x91/0xf0 [ 32.721802] print_report+0xcc/0x620 [ 32.722299] ? __virt_addr_valid+0x102/0x340 [ 32.722851] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.723470] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.724093] kasan_report+0xbe/0xf0 [ 32.724572] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.725200] vma_interval_tree_remove+0xc75/0xec0 [ 32.725798] vma_prepare+0xc54/0x11a0 [ 32.726286] __split_vma+0x5af/0x950 [ 32.726765] ? __pfx___split_vma+0x10/0x10 [ 32.727314] ? find_held_lock+0x2c/0x110 [ 32.727835] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.728403] ? lock_is_held_type+0x9f/0x120 [ 32.728947] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.729580] ? mtree_range_walk+0x632/0x900 [ 32.730147] ? mas_walk+0x5c7/0x7c0 [ 32.730656] do_vmi_munmap+0x1f1/0x2b0 [ 32.731162] mmap_region+0x1f9/0x2660 [ 32.731652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.732172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.732920] ? __pfx_lock_acquire+0x10/0x10 [ 32.733486] ? __pfx_mmap_region+0x10/0x10 [ 32.734040] ? security_mmap_addr+0x7d/0xa0 [ 32.734600] ? get_unmapped_area+0x1f5/0x3f0 [ 32.735173] do_mmap+0x854/0xf00 [ 32.735628] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.736130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.736688] ksys_mmap_pgoff+0x3af/0x500 [ 32.737195] do_syscall_64+0x3f/0x90 [ 32.737670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.738331] RIP: 0033:0x7f1dfdc55d82 [ 32.738791] 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 [ 32.740902] RSP: 002b:00007ffdc66601f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.741819] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dfdc55d82 [ 32.742686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dfd08f000 [ 32.743528] RBP: 00007f1dfd08f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.744367] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efa4634ec0 [ 32.745212] R13: 00007ffdc6660210 R14: 00007ffdc6660240 R15: 00007ffdc66605a0 [ 32.746064] [ 32.746362] [ 32.746579] Allocated by task 213: [ 32.747007] kasan_save_stack+0x22/0x50 [ 32.747519] kasan_set_track+0x25/0x30 [ 32.748022] __kasan_slab_alloc+0x59/0x70 [ 32.748544] kmem_cache_alloc+0x16b/0x370 [ 32.749060] vm_area_dup+0x20/0x160 [ 32.749513] __split_vma+0x170/0x950 [ 32.749981] split_vma+0xc6/0x110 [ 32.750433] mprotect_fixup+0x8d2/0xb30 [ 32.750932] do_mprotect_pkey+0x87e/0xd40 [ 32.751449] __x64_sys_mprotect+0x78/0xc0 [ 32.751967] do_syscall_64+0x3f/0x90 [ 32.752445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.753080] [ 32.753296] Freed by task 213: [ 32.753686] kasan_save_stack+0x22/0x50 [ 32.754194] kasan_set_track+0x25/0x30 [ 32.754699] kasan_save_free_info+0x2b/0x50 [ 32.755230] __kasan_slab_free+0x10a/0x190 [ 32.755767] kmem_cache_free+0x10d/0x4d0 [ 32.756272] rcu_core+0x8c8/0x2860 [ 32.756723] __do_softirq+0x1b7/0x7d4 [ 32.757202] [ 32.757416] Last potentially related work creation: [ 32.758009] kasan_save_stack+0x22/0x50 [ 32.758530] __kasan_record_aux_stack+0x8e/0xa0 [ 32.759179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.759828] remove_vma+0x139/0x170 [ 32.760279] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.760845] do_vmi_munmap+0x1f1/0x2b0 [ 32.761338] __vm_munmap+0x138/0x3a0 [ 32.761802] __x64_sys_munmap+0x59/0x80 [ 32.762310] do_syscall_64+0x3f/0x90 [ 32.762783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.763430] [ 32.763645] The buggy address belongs to the object at ffff8880158dd0e8 [ 32.763645] which belongs to the cache vm_area_struct of size 168 [ 32.765108] The buggy address is located 88 bytes inside of [ 32.765108] freed 168-byte region [ffff8880158dd0e8, ffff8880158dd190) [ 32.766547] [ 32.766765] The buggy address belongs to the physical page: [ 32.767419] page:000000006fc3fb04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158dd [ 32.768509] memcg:ffff8880159f8401 [ 32.768941] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.769590] page_type: 0xffffffff() [ 32.770049] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.770986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159f8401 [ 32.771888] page dumped because: kasan: bad access detected [ 32.772542] [ 32.772762] Memory state around the buggy address: [ 32.773339] ffff8880158dd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.774194] ffff8880158dd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.775055] >ffff8880158dd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.775903] ^ [ 32.776537] ffff8880158dd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.777399] ffff8880158dd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.778257] ================================================================== [ 32.779263] Disabling lock debugging due to kernel taint [ 35.264874] BUG: Bad rss-counter state mm:00000000455f1433 type:MM_FILEPAGES val:33 [ 35.265904] BUG: Bad rss-counter state mm:00000000455f1433 type:MM_ANONPAGES val:22 [ 35.831506] BUG: Bad rss-counter state mm:0000000016635dd4 type:MM_FILEPAGES val:32 [ 35.832672] BUG: Bad rss-counter state mm:0000000016635dd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40662' (ECDSA) to the list of known hosts. 2023/06/19 22:08:32 fuzzer started 2023/06/19 22:08:32 dialing manager at localhost:44161 2023/06/19 22:08:32 checking machine... 2023/06/19 22:08:32 checking revisions... [ 36.502893] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:08:32 testing simple program... [ 36.562447] cgroup: Unknown subsys name 'net' [ 36.602569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:31 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=00007fffa067ba88 CR3=000000001848a000 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=2031333a38303a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=003b67d73d6cb084 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813c8006 RDI=0000000000000006 RBP=ffff88806cf09db8 RSP=ffff88806cf09cf8 R8 =0000000000000006 R9 =003b67d73d6cb084 R10=003b9aca00000000 R11=ffff88806cf09ff8 R12=00000000005549f8 R13=003b9aca00000000 R14=000000000020172c R15=00000f423ffff834 RIP=ffffffff813c8006 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 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=00007f891d7d8650 CR3=000000000cc94000 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=8edc3b60ab7e90bcdd4332edf12a9035 XMM02=000000000011d0f8eff9b2d0a8fce9cb XMM03=000000000011d1c82c67c8bc2e329bc3 XMM04=23cca51003cd30d700000000000ae988 XMM05=19e9129bd510f2350000000000134680 XMM06=7d909101a2a1811200000000001334e8 XMM07=e042d86d42eb936e0000000000124d68 XMM08=48c1932024bd6b78000000000011d1c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000