syzkaller login: [ 30.893108] sshd (214) used greatest stack depth: 24120 bytes left [ 30.895057] BUG: Bad rss-counter state mm:00000000c3e8341a type:MM_FILEPAGES val:33 [ 30.896852] BUG: Bad rss-counter state mm:00000000c3e8341a type:MM_ANONPAGES val:22 [ 31.042251] ================================================================== [ 31.043319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.044294] Read of size 8 at addr ffff88800e1e6a50 by task sshd/221 [ 31.045203] [ 31.045425] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.046334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.047375] Call Trace: [ 31.047713] [ 31.048003] dump_stack_lvl+0x91/0xf0 [ 31.048520] print_report+0xcc/0x620 [ 31.049019] ? __virt_addr_valid+0x102/0x340 [ 31.049594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050236] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050899] kasan_report+0xbe/0xf0 [ 31.051396] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052047] vma_interval_tree_remove+0xc75/0xec0 [ 31.052675] vma_prepare+0xc54/0x11a0 [ 31.053190] __split_vma+0x5af/0x950 [ 31.053682] ? __pfx___split_vma+0x10/0x10 [ 31.054241] ? find_held_lock+0x2c/0x110 [ 31.054799] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.055391] ? lock_is_held_type+0x9f/0x120 [ 31.055940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.056562] ? mtree_range_walk+0x632/0x900 [ 31.057141] ? mas_walk+0x5c7/0x7c0 [ 31.057634] do_vmi_munmap+0x1f1/0x2b0 [ 31.058150] mmap_region+0x1f9/0x2660 [ 31.058671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.059218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.059967] ? __pfx_lock_acquire+0x10/0x10 [ 31.060517] ? __pfx_mmap_region+0x10/0x10 [ 31.061064] ? security_mmap_addr+0x7d/0xa0 [ 31.061625] ? get_unmapped_area+0x1f5/0x3f0 [ 31.062196] do_mmap+0x854/0xf00 [ 31.062686] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.063214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.063796] ksys_mmap_pgoff+0x3af/0x500 [ 31.064326] do_syscall_64+0x3f/0x90 [ 31.064819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065500] RIP: 0033:0x7f6649e90d82 [ 31.065986] 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 [ 31.068212] RSP: 002b:00007ffc592780b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.069149] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6649e90d82 [ 31.070024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66492ca000 [ 31.070926] RBP: 00007f66492ca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.071809] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe50ae2ec0 [ 31.072672] R13: 00007ffc592780d0 R14: 00007ffc59278100 R15: 00007ffc59278460 [ 31.073564] [ 31.073861] [ 31.074086] Allocated by task 214: [ 31.074554] kasan_save_stack+0x22/0x50 [ 31.075086] kasan_set_track+0x25/0x30 [ 31.075592] __kasan_slab_alloc+0x59/0x70 [ 31.076129] kmem_cache_alloc+0x16b/0x370 [ 31.076672] vm_area_dup+0x20/0x160 [ 31.077139] __split_vma+0x170/0x950 [ 31.077625] split_vma+0xc6/0x110 [ 31.078090] mprotect_fixup+0x8d2/0xb30 [ 31.078608] do_mprotect_pkey+0x87e/0xd40 [ 31.079161] __x64_sys_mprotect+0x78/0xc0 [ 31.079700] do_syscall_64+0x3f/0x90 [ 31.080203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080885] [ 31.081110] Freed by task 214: [ 31.081513] kasan_save_stack+0x22/0x50 [ 31.082039] kasan_set_track+0x25/0x30 [ 31.082566] kasan_save_free_info+0x2b/0x50 [ 31.083113] __kasan_slab_free+0x10a/0x190 [ 31.083672] kmem_cache_free+0x10d/0x4d0 [ 31.084207] rcu_core+0x8c8/0x2860 [ 31.084675] __do_softirq+0x1b7/0x7d4 [ 31.085179] [ 31.085399] Last potentially related work creation: [ 31.086017] kasan_save_stack+0x22/0x50 [ 31.086554] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.087821] remove_vma+0x139/0x170 [ 31.088287] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.088873] do_vmi_munmap+0x1f1/0x2b0 [ 31.089391] __vm_munmap+0x138/0x3a0 [ 31.089886] __x64_sys_munmap+0x59/0x80 [ 31.090417] do_syscall_64+0x3f/0x90 [ 31.090918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091594] [ 31.091809] The buggy address belongs to the object at ffff88800e1e69f8 [ 31.091809] which belongs to the cache vm_area_struct of size 168 [ 31.093343] The buggy address is located 88 bytes inside of [ 31.093343] freed 168-byte region [ffff88800e1e69f8, ffff88800e1e6aa0) [ 31.094839] [ 31.095057] The buggy address belongs to the physical page: [ 31.095746] page:000000002737745b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1e6 [ 31.096869] memcg:ffff88800cb42c01 [ 31.097307] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.097993] page_type: 0xffffffff() [ 31.098473] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.099438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb42c01 [ 31.100397] page dumped because: kasan: bad access detected [ 31.101082] [ 31.101301] Memory state around the buggy address: [ 31.101909] ffff88800e1e6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.102791] ffff88800e1e6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.103679] >ffff88800e1e6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104575] ^ [ 31.105296] ffff88800e1e6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.106177] ffff88800e1e6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.107035] ================================================================== [ 31.108017] Disabling lock debugging due to kernel taint [ 33.097354] BUG: Bad rss-counter state mm:00000000cc2e6da0 type:MM_FILEPAGES val:33 [ 33.098375] BUG: Bad rss-counter state mm:00000000cc2e6da0 type:MM_ANONPAGES val:22 [ 33.561760] BUG: Bad rss-counter state mm:00000000441039f2 type:MM_FILEPAGES val:33 [ 33.563506] BUG: Bad rss-counter state mm:00000000441039f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21946' (ECDSA) to the list of known hosts. 2023/06/20 23:13:13 fuzzer started 2023/06/20 23:13:13 dialing manager at localhost:36067 2023/06/20 23:13:13 checking machine... 2023/06/20 23:13:13 checking revisions... [ 34.302167] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:13:13 testing simple program... [ 34.355351] cgroup: Unknown subsys name 'net' [ 34.399041] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=ffff888019807c01 RSI=ffff888019807c60 RDI=ffff888019807c60 RBP=ffff88806ce09ac8 RSP=ffff88806ce099f8 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff888019807c60 R15=ffff88806ce09a70 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 00007f9ddbbae900 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=00007ffe61e41000 CR3=0000000016fb6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000004000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffffffff81288ac0 RDI=0000000000000007 RBP=dffffc0000000000 RSP=ffff888008e07e78 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84513785 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=00007f8e566b5750 CR3=000000000ca58000 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=2033313a33313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33313a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000