syzkaller login: [ 33.343216] BUG: Bad rss-counter state mm:000000004c529fdb type:MM_FILEPAGES val:33 [ 33.345066] BUG: Bad rss-counter state mm:000000004c529fdb type:MM_ANONPAGES val:22 [ 33.529202] ================================================================== [ 33.530102] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.531184] Read of size 8 at addr ffff88800cea6df0 by task sshd/221 [ 33.531945] [ 33.532159] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.533009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.534007] Call Trace: [ 33.534325] [ 33.534611] dump_stack_lvl+0x91/0xf0 [ 33.535128] print_report+0xcc/0x620 [ 33.535603] ? __virt_addr_valid+0x102/0x340 [ 33.536152] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.536762] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.537370] kasan_report+0xbe/0xf0 [ 33.537839] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.538455] vma_interval_tree_remove+0xc75/0xec0 [ 33.539063] vma_prepare+0xc54/0x11a0 [ 33.539539] __split_vma+0x5af/0x950 [ 33.540005] ? __pfx___split_vma+0x10/0x10 [ 33.540532] ? find_held_lock+0x2c/0x110 [ 33.541057] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.541627] ? lock_is_held_type+0x9f/0x120 [ 33.542157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.542759] ? mtree_range_walk+0x632/0x900 [ 33.543320] ? mas_walk+0x5c7/0x7c0 [ 33.543788] do_vmi_munmap+0x1f1/0x2b0 [ 33.544275] mmap_region+0x1f9/0x2660 [ 33.544762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.545269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.545978] ? __pfx_lock_acquire+0x10/0x10 [ 33.546505] ? __pfx_mmap_region+0x10/0x10 [ 33.547033] ? security_mmap_addr+0x7d/0xa0 [ 33.547592] ? get_unmapped_area+0x1f5/0x3f0 [ 33.548136] do_mmap+0x854/0xf00 [ 33.548574] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.549065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.549633] ksys_mmap_pgoff+0x3af/0x500 [ 33.550135] do_syscall_64+0x3f/0x90 [ 33.550605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.551254] RIP: 0033:0x7f6c882f8d82 [ 33.551704] 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 [ 33.553808] RSP: 002b:00007fff54559ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.554702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c882f8d82 [ 33.555564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c87732000 [ 33.556420] RBP: 00007f6c87732000 R08: 0000000000000009 R09: 0000000000001000 [ 33.557254] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654b8948ec0 [ 33.558092] R13: 00007fff54559af0 R14: 00007fff54559b20 R15: 00007fff54559e80 [ 33.558934] [ 33.559244] [ 33.559460] Allocated by task 214: [ 33.559880] kasan_save_stack+0x22/0x50 [ 33.560382] kasan_set_track+0x25/0x30 [ 33.560877] __kasan_slab_alloc+0x59/0x70 [ 33.561407] kmem_cache_alloc+0x16b/0x370 [ 33.561924] vm_area_dup+0x20/0x160 [ 33.562389] __split_vma+0x170/0x950 [ 33.562862] split_vma+0xc6/0x110 [ 33.563315] mprotect_fixup+0x8d2/0xb30 [ 33.563817] do_mprotect_pkey+0x87e/0xd40 [ 33.564335] __x64_sys_mprotect+0x78/0xc0 [ 33.564851] do_syscall_64+0x3f/0x90 [ 33.565330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.565969] [ 33.566183] Freed by task 204: [ 33.566581] kasan_save_stack+0x22/0x50 [ 33.567088] kasan_set_track+0x25/0x30 [ 33.567590] kasan_save_free_info+0x2b/0x50 [ 33.568119] __kasan_slab_free+0x10a/0x190 [ 33.568657] kmem_cache_free+0x10d/0x4d0 [ 33.569164] rcu_core+0x8c8/0x2860 [ 33.569609] __do_softirq+0x1b7/0x7d4 [ 33.570088] [ 33.570303] Last potentially related work creation: [ 33.570890] kasan_save_stack+0x22/0x50 [ 33.571409] __kasan_record_aux_stack+0x8e/0xa0 [ 33.571994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.572637] remove_vma+0x139/0x170 [ 33.573093] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.573667] do_vmi_munmap+0x1f1/0x2b0 [ 33.574155] __vm_munmap+0x138/0x3a0 [ 33.574637] __x64_sys_munmap+0x59/0x80 [ 33.575142] do_syscall_64+0x3f/0x90 [ 33.575617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.576275] [ 33.576492] The buggy address belongs to the object at ffff88800cea6d98 [ 33.576492] which belongs to the cache vm_area_struct of size 168 [ 33.577972] The buggy address is located 88 bytes inside of [ 33.577972] freed 168-byte region [ffff88800cea6d98, ffff88800cea6e40) [ 33.579393] [ 33.579608] The buggy address belongs to the physical page: [ 33.580276] page:000000000f20e1a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcea6 [ 33.581363] memcg:ffff88800ca17701 [ 33.581784] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.582435] page_type: 0xffffffff() [ 33.582886] raw: 0100000000000200 ffff88800879fc80 ffffea0000343540 dead000000000002 [ 33.583843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca17701 [ 33.584751] page dumped because: kasan: bad access detected [ 33.585416] [ 33.585631] Memory state around the buggy address: [ 33.586222] ffff88800cea6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.587087] ffff88800cea6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.587945] >ffff88800cea6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.588804] ^ [ 33.589620] ffff88800cea6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.590491] ffff88800cea6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.591363] ================================================================== [ 33.592359] Disabling lock debugging due to kernel taint [ 35.628086] BUG: Bad rss-counter state mm:00000000d5de6c45 type:MM_FILEPAGES val:33 [ 35.629330] BUG: Bad rss-counter state mm:00000000d5de6c45 type:MM_ANONPAGES val:22 [ 36.028171] BUG: Bad rss-counter state mm:00000000bf2ceda4 type:MM_FILEPAGES val:33 [ 36.029090] BUG: Bad rss-counter state mm:00000000bf2ceda4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48910' (ECDSA) to the list of known hosts. 2023/06/19 21:58:32 fuzzer started 2023/06/19 21:58:32 dialing manager at localhost:44161 2023/06/19 21:58:32 checking machine... 2023/06/19 21:58:32 checking revisions... [ 36.751567] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:58:32 testing simple program... [ 36.804458] cgroup: Unknown subsys name 'net' [ 36.850976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:58:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000006 RCX=0000000000000000 RDX=ffff888016393680 RSI=ffffffff81f4dd00 RDI=0000000000000005 RBP=ffff888015db7c20 RSP=ffff888015db7a38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000006 R11=00000000000b6996 R12=ffff8880090d5808 R13=ffff888015db7c24 R14=ffff8880090d5808 R15=dffffc0000000000 RIP=ffffffff814c081b 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 00007f54f7f6d900 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=00007f54f8524618 CR3=00000000168e6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f5a43973bf0 CR3=000000000d826000 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=6336c706f2d9dfa70f4554b2b0a116b3 XMM02=000000000011d048eff9b2d0a8fce9cb XMM03=000000000011d1182c67c8bc2e329bc3 XMM04=d61acc9f12b9cf3500000000000ae988 XMM05=45fcd2cc860da3ff0000000000134eb0 XMM06=c291bd5c70af25b90000000000133f50 XMM07=e042d86d42eb936e00000000001247d8 XMM08=ad09870c9bfa2e92000000000011d118 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000