syzkaller login: [ 35.518453] BUG: Bad rss-counter state mm:0000000012737977 type:MM_FILEPAGES val:33 [ 35.519469] BUG: Bad rss-counter state mm:0000000012737977 type:MM_ANONPAGES val:22 [ 35.556477] ================================================================== [ 35.557814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.558952] Read of size 8 at addr ffff888008daa798 by task sshd/222 [ 35.559893] [ 35.560152] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.561203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.562416] Call Trace: [ 35.562808] [ 35.563145] dump_stack_lvl+0x91/0xf0 [ 35.563744] print_report+0xcc/0x620 [ 35.564324] ? __virt_addr_valid+0x102/0x340 [ 35.565125] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.565890] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.566645] kasan_report+0xbe/0xf0 [ 35.567216] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.567970] vma_interval_tree_remove+0xc75/0xec0 [ 35.568693] vma_prepare+0xc54/0x11a0 [ 35.569270] __split_vma+0x5af/0x950 [ 35.569860] ? __pfx___split_vma+0x10/0x10 [ 35.570496] ? find_held_lock+0x2c/0x110 [ 35.571130] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.571815] ? lock_is_held_type+0x9f/0x120 [ 35.572465] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.573136] ? mtree_range_walk+0x632/0x900 [ 35.573787] ? mas_walk+0x5c7/0x7c0 [ 35.574334] do_vmi_munmap+0x1f1/0x2b0 [ 35.574866] mmap_region+0x1f9/0x2660 [ 35.575325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.575806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.576480] ? __pfx_lock_acquire+0x10/0x10 [ 35.576977] ? __pfx_mmap_region+0x10/0x10 [ 35.577478] ? security_mmap_addr+0x7d/0xa0 [ 35.577995] ? get_unmapped_area+0x1f5/0x3f0 [ 35.578515] do_mmap+0x854/0xf00 [ 35.578947] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.579435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.579989] ksys_mmap_pgoff+0x3af/0x500 [ 35.580485] do_syscall_64+0x3f/0x90 [ 35.580946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.581580] RIP: 0033:0x7f56e0021d82 [ 35.582038] 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 [ 35.584102] RSP: 002b:00007ffdc4e03fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.584980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56e0021d82 [ 35.585813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56df45b000 [ 35.586637] RBP: 00007f56df45b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.587454] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad36a73ec0 [ 35.588276] R13: 00007ffdc4e04000 R14: 00007ffdc4e04030 R15: 00007ffdc4e04390 [ 35.589107] [ 35.589388] [ 35.589597] Allocated by task 215: [ 35.590033] kasan_save_stack+0x22/0x50 [ 35.590522] kasan_set_track+0x25/0x30 [ 35.591000] __kasan_slab_alloc+0x59/0x70 [ 35.591513] kmem_cache_alloc+0x16b/0x370 [ 35.592021] vm_area_dup+0x20/0x160 [ 35.592462] __split_vma+0x170/0x950 [ 35.592912] split_vma+0xc6/0x110 [ 35.593339] mprotect_fixup+0x8d2/0xb30 [ 35.593855] do_mprotect_pkey+0x87e/0xd40 [ 35.594365] __x64_sys_mprotect+0x78/0xc0 [ 35.594880] do_syscall_64+0x3f/0x90 [ 35.595348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.595971] [ 35.596181] Freed by task 215: [ 35.596562] kasan_save_stack+0x22/0x50 [ 35.597082] kasan_set_track+0x25/0x30 [ 35.597618] kasan_save_free_info+0x2b/0x50 [ 35.598165] __kasan_slab_free+0x10a/0x190 [ 35.598695] kmem_cache_free+0x10d/0x4d0 [ 35.599183] rcu_core+0x8c8/0x2860 [ 35.599614] __do_softirq+0x1b7/0x7d4 [ 35.600079] [ 35.600287] Last potentially related work creation: [ 35.600846] kasan_save_stack+0x22/0x50 [ 35.601334] __kasan_record_aux_stack+0x8e/0xa0 [ 35.601903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.602528] remove_vma+0x139/0x170 [ 35.602968] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.603503] do_vmi_munmap+0x1f1/0x2b0 [ 35.603973] __vm_munmap+0x138/0x3a0 [ 35.604430] __x64_sys_munmap+0x59/0x80 [ 35.604912] do_syscall_64+0x3f/0x90 [ 35.605372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.606010] [ 35.606218] The buggy address belongs to the object at ffff888008daa740 [ 35.606218] which belongs to the cache vm_area_struct of size 168 [ 35.607652] The buggy address is located 88 bytes inside of [ 35.607652] freed 168-byte region [ffff888008daa740, ffff888008daa7e8) [ 35.609029] [ 35.609245] The buggy address belongs to the physical page: [ 35.609894] page:0000000053b07209 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8daa [ 35.610938] memcg:ffff888013f1f401 [ 35.611390] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.612098] page_type: 0xffffffff() [ 35.612539] raw: 0100000000000200 ffff88800879fc80 ffffea00003d1cc0 dead000000000006 [ 35.613431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f1f401 [ 35.614331] page dumped because: kasan: bad access detected [ 35.614958] [ 35.615165] Memory state around the buggy address: [ 35.615726] ffff888008daa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.616553] ffff888008daa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.617374] >ffff888008daa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.618198] ^ [ 35.618676] ffff888008daa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.619509] ffff888008daa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.620327] ================================================================== [ 35.621445] Disabling lock debugging due to kernel taint [ 38.218605] BUG: Bad rss-counter state mm:0000000050360fc5 type:MM_FILEPAGES val:33 [ 38.219897] BUG: Bad rss-counter state mm:0000000050360fc5 type:MM_ANONPAGES val:22 [ 38.672207] BUG: Bad rss-counter state mm:0000000027c4eecf type:MM_FILEPAGES val:33 [ 38.673503] BUG: Bad rss-counter state mm:0000000027c4eecf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43055' (ECDSA) to the list of known hosts. 2023/06/20 00:39:53 fuzzer started 2023/06/20 00:39:53 dialing manager at localhost:44161 2023/06/20 00:39:53 checking machine... 2023/06/20 00:39:53 checking revisions... [ 39.228759] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:39:53 testing simple program... [ 39.279402] cgroup: Unknown subsys name 'net' [ 39.340375] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:46 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffffffff0ba7794 RSI=ffffea000057dd00 RDI=ffffffff85d3bca0 RBP=ffffea000057dd40 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea000057dd70 R11=0000000000015f75 R12=0000000000000000 R13=ffffea000057dd00 R14=0000000000015f74 R15=ffff88807ffdc500 RIP=ffffffff817895c4 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 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=00007f63e4f4f0b0 CR3=0000000016c32000 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=2033353a39333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a39333a3030203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007ff02f179f40 CR3=000000000f184000 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=6df61d25584e4fa2f04fd79979353c2d XMM02=0000000000120038eff9b2d0a8fce9cb XMM03=00000000001201082c67c8bc2e329bc3 XMM04=ac465f0908e0336900000000000ae988 XMM05=8487447cabd3b8e60000000000134750 XMM06=00c3ffa147b8d8570000000000134148 XMM07=e042d86d42eb936e0000000000124988 XMM08=58b43a7ea20f5d650000000000120108 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000