syzkaller login: [ 31.298681] BUG: Bad rss-counter state mm:00000000eeb3b809 type:MM_FILEPAGES val:33 [ 31.300048] BUG: Bad rss-counter state mm:00000000eeb3b809 type:MM_ANONPAGES val:22 [ 31.452645] ================================================================== [ 31.453566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.454505] Read of size 8 at addr ffff8880164ded08 by task sshd/220 [ 31.455303] [ 31.455620] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.456492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.457495] Call Trace: [ 31.457814] <TASK> [ 31.458105] dump_stack_lvl+0x91/0xf0 [ 31.458608] print_report+0xcc/0x620 [ 31.459133] ? __virt_addr_valid+0x102/0x340 [ 31.459688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460312] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460968] kasan_report+0xbe/0xf0 [ 31.461456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.462087] vma_interval_tree_remove+0xc75/0xec0 [ 31.462689] vma_prepare+0xc54/0x11a0 [ 31.463204] __split_vma+0x5af/0x950 [ 31.463678] ? __pfx___split_vma+0x10/0x10 [ 31.464218] ? find_held_lock+0x2c/0x110 [ 31.464761] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.465324] ? lock_is_held_type+0x9f/0x120 [ 31.465871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.466479] ? mtree_range_walk+0x632/0x900 [ 31.467069] ? mas_walk+0x5c7/0x7c0 [ 31.467555] do_vmi_munmap+0x1f1/0x2b0 [ 31.468044] mmap_region+0x1f9/0x2660 [ 31.468532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.469064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.469785] ? __pfx_lock_acquire+0x10/0x10 [ 31.470329] ? __pfx_mmap_region+0x10/0x10 [ 31.470872] ? security_mmap_addr+0x7d/0xa0 [ 31.471431] ? get_unmapped_area+0x1f5/0x3f0 [ 31.471987] do_mmap+0x854/0xf00 [ 31.472424] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.472938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.473496] ksys_mmap_pgoff+0x3af/0x500 [ 31.474012] do_syscall_64+0x3f/0x90 [ 31.474496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.475182] RIP: 0033:0x7fb29f910d82 [ 31.475637] 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 [ 31.477784] RSP: 002b:00007ffcd3d1f7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.478690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb29f910d82 [ 31.479570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb29ed4a000 [ 31.480422] RBP: 00007fb29ed4a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.481283] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9185b9ec0 [ 31.482132] R13: 00007ffcd3d1f7d0 R14: 00007ffcd3d1f800 R15: 00007ffcd3d1fb60 [ 31.483032] </TASK> [ 31.483329] [ 31.483545] Allocated by task 213: [ 31.483973] kasan_save_stack+0x22/0x50 [ 31.484485] kasan_set_track+0x25/0x30 [ 31.484993] __kasan_slab_alloc+0x59/0x70 [ 31.485511] kmem_cache_alloc+0x16b/0x370 [ 31.486024] vm_area_dup+0x20/0x160 [ 31.486481] __split_vma+0x170/0x950 [ 31.486984] split_vma+0xc6/0x110 [ 31.487424] mprotect_fixup+0x8d2/0xb30 [ 31.487925] do_mprotect_pkey+0x87e/0xd40 [ 31.488447] __x64_sys_mprotect+0x78/0xc0 [ 31.488986] do_syscall_64+0x3f/0x90 [ 31.489466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.490109] [ 31.490323] Freed by task 213: [ 31.490722] kasan_save_stack+0x22/0x50 [ 31.491262] kasan_set_track+0x25/0x30 [ 31.491774] kasan_save_free_info+0x2b/0x50 [ 31.492306] __kasan_slab_free+0x10a/0x190 [ 31.492863] kmem_cache_free+0x10d/0x4d0 [ 31.493379] rcu_core+0x8c8/0x2860 [ 31.493827] __do_softirq+0x1b7/0x7d4 [ 31.494304] [ 31.494520] Last potentially related work creation: [ 31.495143] kasan_save_stack+0x22/0x50 [ 31.495653] __kasan_record_aux_stack+0x8e/0xa0 [ 31.496236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.496904] remove_vma+0x139/0x170 [ 31.497363] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.497915] do_vmi_munmap+0x1f1/0x2b0 [ 31.498405] __vm_munmap+0x138/0x3a0 [ 31.498900] __x64_sys_munmap+0x59/0x80 [ 31.499418] do_syscall_64+0x3f/0x90 [ 31.499903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.500540] [ 31.500765] The buggy address belongs to the object at ffff8880164decb0 [ 31.500765] which belongs to the cache vm_area_struct of size 168 [ 31.502233] The buggy address is located 88 bytes inside of [ 31.502233] freed 168-byte region [ffff8880164decb0, ffff8880164ded58) [ 31.503674] [ 31.503891] The buggy address belongs to the physical page: [ 31.504548] page:000000000d539c82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164de [ 31.505657] memcg:ffff88800dd48d01 [ 31.506086] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.506793] page_type: 0xffffffff() [ 31.507286] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7d80 dead000000000007 [ 31.508220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd48d01 [ 31.509155] page dumped because: kasan: bad access detected [ 31.509840] [ 31.510061] Memory state around the buggy address: [ 31.510647] ffff8880164dec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.511540] ffff8880164dec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.512415] >ffff8880164ded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.513303] ^ [ 31.513742] ffff8880164ded80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.514597] ffff8880164dee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.515492] ================================================================== [ 31.516494] Disabling lock debugging due to kernel taint [ 33.842738] BUG: Bad rss-counter state mm:0000000030de4e47 type:MM_FILEPAGES val:33 [ 33.843724] BUG: Bad rss-counter state mm:0000000030de4e47 type:MM_ANONPAGES val:22 [ 34.303916] BUG: Bad rss-counter state mm:00000000b54fddd0 type:MM_FILEPAGES val:33 [ 34.305641] BUG: Bad rss-counter state mm:00000000b54fddd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39959' (ECDSA) to the list of known hosts. 2023/06/21 04:43:40 fuzzer started 2023/06/21 04:43:41 dialing manager at localhost:36067 2023/06/21 04:43:41 checking machine... 2023/06/21 04:43:41 checking revisions... [ 35.080634] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:43:41 testing simple program... [ 35.132825] cgroup: Unknown subsys name 'net' [ 35.180848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:43:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007f3fa3b642fd RSP=ffff8880147ff208 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f3fa3b642fd R13=0000000000000000 R14=ffff88800f02d1c0 R15=0000000000092cc0 RIP=ffffffff84511dd4 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 00007f3fa329a900 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=00007ff28fff4650 CR3=0000000009618000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9f5a7d19042aebeb00000000000ae988 XMM05=6902a9375d1c7c970000000000132008 XMM06=4fda316b135da52b0000000000130df8 XMM07=fb795ef6d65770560000000000121148 XMM08=4f5453444600273d67736d000d0a0920 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=0000000000000001 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=00007ffcc29e2e38 CR3=000000000c6d0000 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=2030343a33343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33343a3430203132 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000