syzkaller login: [ 30.508005] BUG: Bad rss-counter state mm:00000000f3eed576 type:MM_FILEPAGES val:33 [ 30.509385] BUG: Bad rss-counter state mm:00000000f3eed576 type:MM_ANONPAGES val:22 [ 30.680723] ================================================================== [ 30.681707] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.682729] Read of size 8 at addr ffff88801880d228 by task sshd/221 [ 30.683558] [ 30.683796] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.684821] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.685872] Call Trace: [ 30.686212] [ 30.686556] dump_stack_lvl+0x91/0xf0 [ 30.687081] print_report+0xcc/0x620 [ 30.687597] ? __virt_addr_valid+0x102/0x340 [ 30.688183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.688842] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.689504] kasan_report+0xbe/0xf0 [ 30.690024] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690721] vma_interval_tree_remove+0xc75/0xec0 [ 30.691393] vma_prepare+0xc54/0x11a0 [ 30.691923] __split_vma+0x5af/0x950 [ 30.692450] ? __pfx___split_vma+0x10/0x10 [ 30.693030] ? find_held_lock+0x2c/0x110 [ 30.693606] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.694233] ? lock_is_held_type+0x9f/0x120 [ 30.694850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.695526] ? mtree_range_walk+0x632/0x900 [ 30.696142] ? mas_walk+0x5c7/0x7c0 [ 30.696671] do_vmi_munmap+0x1f1/0x2b0 [ 30.697220] mmap_region+0x1f9/0x2660 [ 30.697754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.698331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.699195] ? __pfx_lock_acquire+0x10/0x10 [ 30.699823] ? __pfx_mmap_region+0x10/0x10 [ 30.700454] ? security_mmap_addr+0x7d/0xa0 [ 30.701076] ? get_unmapped_area+0x1f5/0x3f0 [ 30.701723] do_mmap+0x854/0xf00 [ 30.702242] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.702854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.703517] ksys_mmap_pgoff+0x3af/0x500 [ 30.704112] do_syscall_64+0x3f/0x90 [ 30.704679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705444] RIP: 0033:0x7f1681ac2d82 [ 30.705989] 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 [ 30.708519] RSP: 002b:00007fffa92679c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.709591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1681ac2d82 [ 30.710615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1680efc000 [ 30.711616] RBP: 00007f1680efc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.712622] R10: 0000000000000812 R11: 0000000000000206 R12: 000056270bfebf70 [ 30.713618] R13: 00007fffa92679e0 R14: 00007fffa9267a10 R15: 00007fffa9267d70 [ 30.714661] [ 30.715006] [ 30.715261] Allocated by task 214: [ 30.715773] kasan_save_stack+0x22/0x50 [ 30.716368] kasan_set_track+0x25/0x30 [ 30.716954] __kasan_slab_alloc+0x59/0x70 [ 30.717572] kmem_cache_alloc+0x16b/0x370 [ 30.718191] vm_area_dup+0x20/0x160 [ 30.718750] __split_vma+0x170/0x950 [ 30.719306] split_vma+0xc6/0x110 [ 30.719828] mprotect_fixup+0x8d2/0xb30 [ 30.720412] do_mprotect_pkey+0x87e/0xd40 [ 30.721027] __x64_sys_mprotect+0x78/0xc0 [ 30.721651] do_syscall_64+0x3f/0x90 [ 30.722208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722992] [ 30.723247] Freed by task 214: [ 30.723713] kasan_save_stack+0x22/0x50 [ 30.724302] kasan_set_track+0x25/0x30 [ 30.724895] kasan_save_free_info+0x2b/0x50 [ 30.725573] __kasan_slab_free+0x10a/0x190 [ 30.726236] kmem_cache_free+0x10d/0x4d0 [ 30.726849] rcu_core+0x8c8/0x2860 [ 30.727376] __do_softirq+0x1b7/0x7d4 [ 30.727936] [ 30.728193] Last potentially related work creation: [ 30.728878] kasan_save_stack+0x22/0x50 [ 30.729465] __kasan_record_aux_stack+0x8e/0xa0 [ 30.730134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.730901] remove_vma+0x139/0x170 [ 30.731451] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.732116] do_vmi_munmap+0x1f1/0x2b0 [ 30.732695] __vm_munmap+0x138/0x3a0 [ 30.733249] __x64_sys_munmap+0x59/0x80 [ 30.733831] do_syscall_64+0x3f/0x90 [ 30.734398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735188] [ 30.735440] The buggy address belongs to the object at ffff88801880d1d0 [ 30.735440] which belongs to the cache vm_area_struct of size 168 [ 30.737179] The buggy address is located 88 bytes inside of [ 30.737179] freed 168-byte region [ffff88801880d1d0, ffff88801880d278) [ 30.738850] [ 30.739104] The buggy address belongs to the physical page: [ 30.739880] page:000000007c4247f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1880d [ 30.741172] memcg:ffff88801a033c01 [ 30.741678] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.742438] page_type: 0xffffffff() [ 30.742990] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.744085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a033c01 [ 30.745166] page dumped because: kasan: bad access detected [ 30.745955] [ 30.746210] Memory state around the buggy address: [ 30.746907] ffff88801880d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.747917] ffff88801880d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.748938] >ffff88801880d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.749932] ^ [ 30.750589] ffff88801880d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.751594] ffff88801880d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.752601] ================================================================== [ 30.753873] Disabling lock debugging due to kernel taint [ 32.742224] BUG: Bad rss-counter state mm:00000000c1e72cd1 type:MM_FILEPAGES val:33 [ 32.743250] BUG: Bad rss-counter state mm:00000000c1e72cd1 type:MM_ANONPAGES val:22 [ 33.292164] BUG: Bad rss-counter state mm:00000000caac914c type:MM_FILEPAGES val:33 [ 33.293199] BUG: Bad rss-counter state mm:00000000caac914c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34434' (ECDSA) to the list of known hosts. 2023/06/20 15:13:36 fuzzer started 2023/06/20 15:13:36 dialing manager at localhost:36067 2023/06/20 15:13:36 checking machine... 2023/06/20 15:13:36 checking revisions... [ 34.032806] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:13:36 testing simple program... [ 34.093876] cgroup: Unknown subsys name 'net' [ 34.148789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fca26803040 CR3=000000000f164000 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=6ed5ddda1afd93a7dd47783a836ccd7f XMM02=eff9b2d0a8fce9cb000000000011d3e0 XMM03=2c67c8bc2e329bc3000000000011d508 XMM04=6bdab2be4d23680e00000000000ae988 XMM05=77e8623aff86e53a0000000000132ac8 XMM06=e4cb8bb95a7664b60000000000131960 XMM07=fb795ef6d65770560000000000121b98 XMM08=2c67c8bc2e329bc3000000000011d508 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffaec1c9650 CR3=000000000daa2000 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=2036333a33313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a33313a3531203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000