syzkaller login: [ 41.778943] BUG: Bad rss-counter state mm:00000000431f996d type:MM_FILEPAGES val:33 [ 41.780811] BUG: Bad rss-counter state mm:00000000431f996d type:MM_ANONPAGES val:22 [ 41.951378] ================================================================== [ 41.952285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.953264] Read of size 8 at addr ffff8880167dad08 by task sshd/227 [ 41.954191] [ 41.954408] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.955284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.956277] Call Trace: [ 41.956596] [ 41.956893] dump_stack_lvl+0x91/0xf0 [ 41.957374] print_report+0xcc/0x620 [ 41.957871] ? __virt_addr_valid+0x102/0x340 [ 41.958440] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.959081] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.959715] kasan_report+0xbe/0xf0 [ 41.960191] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.960828] vma_interval_tree_remove+0xc75/0xec0 [ 41.961430] vma_prepare+0xc54/0x11a0 [ 41.961934] __split_vma+0x5af/0x950 [ 41.962437] ? __pfx___split_vma+0x10/0x10 [ 41.962988] ? find_held_lock+0x2c/0x110 [ 41.963505] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.964085] ? lock_is_held_type+0x9f/0x120 [ 41.964626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.965251] ? mtree_range_walk+0x632/0x900 [ 41.965826] ? mas_walk+0x5c7/0x7c0 [ 41.966312] do_vmi_munmap+0x1f1/0x2b0 [ 41.966833] mmap_region+0x1f9/0x2660 [ 41.967324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.967854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.968556] ? __pfx_lock_acquire+0x10/0x10 [ 41.969092] ? __pfx_mmap_region+0x10/0x10 [ 41.969623] ? security_mmap_addr+0x7d/0xa0 [ 41.970191] ? get_unmapped_area+0x1f5/0x3f0 [ 41.970759] do_mmap+0x854/0xf00 [ 41.971205] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.971720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.972284] ksys_mmap_pgoff+0x3af/0x500 [ 41.972805] do_syscall_64+0x3f/0x90 [ 41.973280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.973960] RIP: 0033:0x7f0e75ac3d82 [ 41.974431] 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 [ 41.976575] RSP: 002b:00007ffe64eb70b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.977523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e75ac3d82 [ 41.978409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e74efd000 [ 41.979273] RBP: 00007f0e74efd000 R08: 0000000000000009 R09: 0000000000001000 [ 41.980147] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbd5b1fb20 [ 41.981010] R13: 00007ffe64eb70d0 R14: 00007ffe64eb7100 R15: 00007ffe64eb7460 [ 41.981907] [ 41.982239] [ 41.982450] Allocated by task 220: [ 41.982896] kasan_save_stack+0x22/0x50 [ 41.983416] kasan_set_track+0x25/0x30 [ 41.983919] __kasan_slab_alloc+0x59/0x70 [ 41.984442] kmem_cache_alloc+0x16b/0x370 [ 41.984977] vm_area_dup+0x20/0x160 [ 41.985436] __split_vma+0x170/0x950 [ 41.985925] split_vma+0xc6/0x110 [ 41.986376] mprotect_fixup+0x8d2/0xb30 [ 41.986895] do_mprotect_pkey+0x87e/0xd40 [ 41.987412] __x64_sys_mprotect+0x78/0xc0 [ 41.987945] do_syscall_64+0x3f/0x90 [ 41.988414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.989062] [ 41.989274] Freed by task 220: [ 41.989699] kasan_save_stack+0x22/0x50 [ 41.990234] kasan_set_track+0x25/0x30 [ 41.990748] kasan_save_free_info+0x2b/0x50 [ 41.991276] __kasan_slab_free+0x10a/0x190 [ 41.991825] kmem_cache_free+0x10d/0x4d0 [ 41.992335] rcu_core+0x8c8/0x2860 [ 41.992795] __do_softirq+0x1b7/0x7d4 [ 41.993265] [ 41.993477] Last potentially related work creation: [ 41.994096] kasan_save_stack+0x22/0x50 [ 41.994604] __kasan_record_aux_stack+0x8e/0xa0 [ 41.995194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.995848] remove_vma+0x139/0x170 [ 41.996295] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.996872] do_vmi_munmap+0x1f1/0x2b0 [ 41.997358] __vm_munmap+0x138/0x3a0 [ 41.997865] __x64_sys_munmap+0x59/0x80 [ 41.998390] do_syscall_64+0x3f/0x90 [ 41.998883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.999516] [ 41.999744] The buggy address belongs to the object at ffff8880167dacb0 [ 41.999744] which belongs to the cache vm_area_struct of size 168 [ 42.001227] The buggy address is located 88 bytes inside of [ 42.001227] freed 168-byte region [ffff8880167dacb0, ffff8880167dad58) [ 42.002676] [ 42.002894] The buggy address belongs to the physical page: [ 42.003540] page:000000000f05b8e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167da [ 42.004666] memcg:ffff888018e7ef01 [ 42.005097] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.005761] page_type: 0xffffffff() [ 42.006229] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.007155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e7ef01 [ 42.008074] page dumped because: kasan: bad access detected [ 42.008745] [ 42.008959] Memory state around the buggy address: [ 42.009539] ffff8880167dac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.010441] ffff8880167dac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.011309] >ffff8880167dad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.012178] ^ [ 42.012629] ffff8880167dad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.013494] ffff8880167dae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.014404] ================================================================== [ 42.015674] Disabling lock debugging due to kernel taint [ 44.031650] BUG: Bad rss-counter state mm:00000000d30f27c5 type:MM_FILEPAGES val:33 [ 44.032650] BUG: Bad rss-counter state mm:00000000d30f27c5 type:MM_ANONPAGES val:22 [ 44.504645] BUG: Bad rss-counter state mm:000000005667d271 type:MM_FILEPAGES val:33 [ 44.506081] BUG: Bad rss-counter state mm:000000005667d271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38125' (ECDSA) to the list of known hosts. 2023/06/20 02:43:09 fuzzer started 2023/06/20 02:43:09 dialing manager at localhost:44161 2023/06/20 02:43:09 checking machine... 2023/06/20 02:43:09 checking revisions... [ 45.239536] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:43:09 testing simple program... [ 45.279888] cgroup: Unknown subsys name 'net' [ 45.336925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:06 Registers: info registers vcpu 0 RAX=ffff888016ff7aa0 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016ff7a01 RSI=ffff888016ff7a10 RDI=ffff888016ff7a10 RBP=ffff888016ff76f0 RSP=ffff888016ff7620 R8 =0000000000000001 R9 =ffff888016ff76d8 R10=0000000000038001 R11=0000000000020dae R12=ffff888016ff76f8 R13=ffff888016ff76e0 R14=ffff888016ff7a10 R15=ffff888016ff7698 RIP=ffffffff8112fbf3 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 00007fea1c11f900 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=00007fea1c0fe020 CR3=00000000166d8000 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=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 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=00007f03a9958860 CR3=000000000963a000 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=a911d7b3fadef4b0224bb968891eb8ca XMM02=000000000011d248eff9b2d0a8fce9cb XMM03=000000000011d3182c67c8bc2e329bc3 XMM04=a286620f6506515e00000000000ae988 XMM05=0b73446673e2cfb30000000000134650 XMM06=e8008b1642ea3e600000000000133380 XMM07=e042d86d42eb936e0000000000123f50 XMM08=6a3bd701f3968193000000000011d318 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000