syzkaller login: [ 30.779146] BUG: Bad rss-counter state mm:00000000de2e4172 type:MM_FILEPAGES val:33 [ 30.780567] BUG: Bad rss-counter state mm:00000000de2e4172 type:MM_ANONPAGES val:22 [ 30.952047] ================================================================== [ 30.952991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.953954] Read of size 8 at addr ffff88800e52b228 by task sshd/222 [ 30.954739] [ 30.955072] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.955951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.956935] Call Trace: [ 30.957288] [ 30.957576] dump_stack_lvl+0x91/0xf0 [ 30.958074] print_report+0xcc/0x620 [ 30.958561] ? __virt_addr_valid+0x102/0x340 [ 30.959142] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.959768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.960399] kasan_report+0xbe/0xf0 [ 30.960871] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961499] vma_interval_tree_remove+0xc75/0xec0 [ 30.962113] vma_prepare+0xc54/0x11a0 [ 30.962598] __split_vma+0x5af/0x950 [ 30.963092] ? __pfx___split_vma+0x10/0x10 [ 30.963631] ? find_held_lock+0x2c/0x110 [ 30.964162] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.964735] ? lock_is_held_type+0x9f/0x120 [ 30.965274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.965891] ? mtree_range_walk+0x632/0x900 [ 30.966445] ? mas_walk+0x5c7/0x7c0 [ 30.966924] do_vmi_munmap+0x1f1/0x2b0 [ 30.967418] mmap_region+0x1f9/0x2660 [ 30.967899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.968443] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.969177] ? __pfx_lock_acquire+0x10/0x10 [ 30.969711] ? __pfx_mmap_region+0x10/0x10 [ 30.970239] ? security_mmap_addr+0x7d/0xa0 [ 30.970771] ? get_unmapped_area+0x1f5/0x3f0 [ 30.971335] do_mmap+0x854/0xf00 [ 30.971775] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.972273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.972837] ksys_mmap_pgoff+0x3af/0x500 [ 30.973351] do_syscall_64+0x3f/0x90 [ 30.973859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974579] RIP: 0033:0x7f0fa511fd82 [ 30.975098] 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 [ 30.977437] RSP: 002b:00007ffdfdcd82c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.978476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0fa511fd82 [ 30.979472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0fa4559000 [ 30.980446] RBP: 00007f0fa4559000 R08: 0000000000000009 R09: 0000000000001000 [ 30.981426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e7126e3f60 [ 30.982396] R13: 00007ffdfdcd82e0 R14: 00007ffdfdcd8310 R15: 00007ffdfdcd8670 [ 30.983397] [ 30.983729] [ 30.983977] Allocated by task 215: [ 30.984469] kasan_save_stack+0x22/0x50 [ 30.985052] kasan_set_track+0x25/0x30 [ 30.985625] __kasan_slab_alloc+0x59/0x70 [ 30.986227] kmem_cache_alloc+0x16b/0x370 [ 30.986812] vm_area_dup+0x20/0x160 [ 30.987361] __split_vma+0x170/0x950 [ 30.987896] split_vma+0xc6/0x110 [ 30.988398] mprotect_fixup+0x8d2/0xb30 [ 30.988979] do_mprotect_pkey+0x87e/0xd40 [ 30.989575] __x64_sys_mprotect+0x78/0xc0 [ 30.990167] do_syscall_64+0x3f/0x90 [ 30.990721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991471] [ 30.991715] Freed by task 19: [ 30.992157] kasan_save_stack+0x22/0x50 [ 30.992741] kasan_set_track+0x25/0x30 [ 30.993299] kasan_save_free_info+0x2b/0x50 [ 30.993909] __kasan_slab_free+0x10a/0x190 [ 30.994527] kmem_cache_free+0x10d/0x4d0 [ 30.995122] rcu_core+0x8c8/0x2860 [ 30.995630] __do_softirq+0x1b7/0x7d4 [ 30.996175] [ 30.996417] Last potentially related work creation: [ 30.997083] kasan_save_stack+0x22/0x50 [ 30.997659] __kasan_record_aux_stack+0x8e/0xa0 [ 30.998314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.999069] remove_vma+0x139/0x170 [ 30.999579] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.000217] do_vmi_munmap+0x1f1/0x2b0 [ 31.000770] __vm_munmap+0x138/0x3a0 [ 31.001305] __x64_sys_munmap+0x59/0x80 [ 31.001879] do_syscall_64+0x3f/0x90 [ 31.002424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003169] [ 31.003413] The buggy address belongs to the object at ffff88800e52b1d0 [ 31.003413] which belongs to the cache vm_area_struct of size 168 [ 31.005099] The buggy address is located 88 bytes inside of [ 31.005099] freed 168-byte region [ffff88800e52b1d0, ffff88800e52b278) [ 31.006682] [ 31.006940] The buggy address belongs to the physical page: [ 31.007686] page:00000000409d243b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe52b [ 31.008904] memcg:ffff8880099c3d01 [ 31.009386] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.010120] page_type: 0xffffffff() [ 31.010629] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.011675] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099c3d01 [ 31.012711] page dumped because: kasan: bad access detected [ 31.013473] [ 31.013712] Memory state around the buggy address: [ 31.014338] ffff88800e52b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.015275] ffff88800e52b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.016251] >ffff88800e52b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.017179] ^ [ 31.017785] ffff88800e52b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.018719] ffff88800e52b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.019646] ================================================================== [ 31.020701] Disabling lock debugging due to kernel taint [ 32.989861] BUG: Bad rss-counter state mm:00000000448bb94a type:MM_FILEPAGES val:33 [ 32.990880] BUG: Bad rss-counter state mm:00000000448bb94a type:MM_ANONPAGES val:22 [ 33.453426] BUG: Bad rss-counter state mm:00000000df14f091 type:MM_FILEPAGES val:33 [ 33.454449] BUG: Bad rss-counter state mm:00000000df14f091 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60582' (ECDSA) to the list of known hosts. 2023/06/21 05:20:25 fuzzer started 2023/06/21 05:20:26 dialing manager at localhost:36067 2023/06/21 05:20:26 checking machine... 2023/06/21 05:20:26 checking revisions... [ 34.187679] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:20:26 testing simple program... [ 34.229936] cgroup: Unknown subsys name 'net' [ 34.285319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:20:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce2c240 RCX=ffffffff812d86ea RDX=ffff88806ce2c2b0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88806ce2c2b0 RSP=ffff88806ce09fa8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806ce2c2b8 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813fb626 RFL=00000082 [--S----] 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=00007fbbeb3daae0 CR3=000000000cf02000 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=2035323a30323a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30323a3530203132 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb6056d701c CR3=000000000e882000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000