syzkaller login: [ 31.553929] BUG: Bad rss-counter state mm:0000000001655040 type:MM_FILEPAGES val:33 [ 31.555034] BUG: Bad rss-counter state mm:0000000001655040 type:MM_ANONPAGES val:22 [ 31.600271] ================================================================== [ 31.601374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.602408] Read of size 8 at addr ffff888019e0fdf0 by task sshd/219 [ 31.603252] [ 31.603483] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.604424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.605506] Call Trace: [ 31.605878] [ 31.606178] dump_stack_lvl+0x91/0xf0 [ 31.606711] print_report+0xcc/0x620 [ 31.607249] ? __virt_addr_valid+0x102/0x340 [ 31.607854] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.608536] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.609224] kasan_report+0xbe/0xf0 [ 31.609723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.610410] vma_interval_tree_remove+0xc75/0xec0 [ 31.611060] vma_prepare+0xc54/0x11a0 [ 31.611581] __split_vma+0x5af/0x950 [ 31.612099] ? __pfx___split_vma+0x10/0x10 [ 31.612650] ? find_held_lock+0x2c/0x110 [ 31.613208] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.613793] ? lock_is_held_type+0x9f/0x120 [ 31.614358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.614984] ? mtree_range_walk+0x632/0x900 [ 31.615541] ? mas_walk+0x5c7/0x7c0 [ 31.616032] do_vmi_munmap+0x1f1/0x2b0 [ 31.616532] mmap_region+0x1f9/0x2660 [ 31.617040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.617553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.618310] ? __pfx_lock_acquire+0x10/0x10 [ 31.618858] ? __pfx_mmap_region+0x10/0x10 [ 31.619411] ? security_mmap_addr+0x7d/0xa0 [ 31.619975] ? get_unmapped_area+0x1f5/0x3f0 [ 31.620549] do_mmap+0x854/0xf00 [ 31.621011] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.621517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.622123] ksys_mmap_pgoff+0x3af/0x500 [ 31.622640] do_syscall_64+0x3f/0x90 [ 31.623146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.623814] RIP: 0033:0x7fb32b161d82 [ 31.624285] 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 [ 31.626492] RSP: 002b:00007fff07b55cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.627442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb32b161d82 [ 31.628331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb32a59b000 [ 31.629244] RBP: 00007fb32a59b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.630173] R10: 0000000000000812 R11: 0000000000000206 R12: 000055617b7a1ec0 [ 31.631092] R13: 00007fff07b55cf0 R14: 00007fff07b55d20 R15: 00007fff07b56080 [ 31.632017] [ 31.632328] [ 31.632580] Allocated by task 212: [ 31.633057] kasan_save_stack+0x22/0x50 [ 31.633588] kasan_set_track+0x25/0x30 [ 31.634137] __kasan_slab_alloc+0x59/0x70 [ 31.634685] kmem_cache_alloc+0x16b/0x370 [ 31.635236] vm_area_dup+0x20/0x160 [ 31.635711] __split_vma+0x170/0x950 [ 31.636208] split_vma+0xc6/0x110 [ 31.636678] mprotect_fixup+0x8d2/0xb30 [ 31.637216] do_mprotect_pkey+0x87e/0xd40 [ 31.637774] __x64_sys_mprotect+0x78/0xc0 [ 31.638336] do_syscall_64+0x3f/0x90 [ 31.638845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.639520] [ 31.639738] Freed by task 212: [ 31.640164] kasan_save_stack+0x22/0x50 [ 31.640710] kasan_set_track+0x25/0x30 [ 31.641235] kasan_save_free_info+0x2b/0x50 [ 31.641803] __kasan_slab_free+0x10a/0x190 [ 31.642366] kmem_cache_free+0x10d/0x4d0 [ 31.642910] rcu_core+0x8c8/0x2860 [ 31.643374] __do_softirq+0x1b7/0x7d4 [ 31.643884] [ 31.644107] Last potentially related work creation: [ 31.644733] kasan_save_stack+0x22/0x50 [ 31.645267] __kasan_record_aux_stack+0x8e/0xa0 [ 31.645877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.646551] remove_vma+0x139/0x170 [ 31.647034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.647613] do_vmi_munmap+0x1f1/0x2b0 [ 31.648130] __vm_munmap+0x138/0x3a0 [ 31.648631] __x64_sys_munmap+0x59/0x80 [ 31.649168] do_syscall_64+0x3f/0x90 [ 31.649667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.650365] [ 31.650592] The buggy address belongs to the object at ffff888019e0fd98 [ 31.650592] which belongs to the cache vm_area_struct of size 168 [ 31.652141] The buggy address is located 88 bytes inside of [ 31.652141] freed 168-byte region [ffff888019e0fd98, ffff888019e0fe40) [ 31.653647] [ 31.653899] The buggy address belongs to the physical page: [ 31.654591] page:000000000a7689f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e0f [ 31.655741] memcg:ffff888016574901 [ 31.656198] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.656910] page_type: 0xffffffff() [ 31.657380] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.658359] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016574901 [ 31.659324] page dumped because: kasan: bad access detected [ 31.660023] [ 31.660247] Memory state around the buggy address: [ 31.660880] ffff888019e0fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.661802] ffff888019e0fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.662707] >ffff888019e0fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.663594] ^ [ 31.664456] ffff888019e0fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.665389] ffff888019e0fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.666305] ================================================================== [ 31.667734] Disabling lock debugging due to kernel taint [ 33.503399] BUG: Bad rss-counter state mm:0000000046c5aa01 type:MM_FILEPAGES val:33 [ 33.504222] BUG: Bad rss-counter state mm:0000000046c5aa01 type:MM_ANONPAGES val:22 [ 33.951295] BUG: Bad rss-counter state mm:0000000004e2256a type:MM_FILEPAGES val:33 [ 33.952281] BUG: Bad rss-counter state mm:0000000004e2256a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19184' (ECDSA) to the list of known hosts. 2023/06/21 05:29:46 fuzzer started 2023/06/21 05:29:46 dialing manager at localhost:36067 2023/06/21 05:29:47 checking machine... 2023/06/21 05:29:47 checking revisions... [ 34.679893] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:29:47 testing simple program... [ 34.719177] cgroup: Unknown subsys name 'net' [ 34.768449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11002ce5f1c RDX=dffffc0000000000 RSI=ffffffff8180ce89 RDI=ffff88801672f888 RBP=ffff88801672f8e0 RSP=ffff88801672f818 R8 =ffffffff86138eb4 R9 =ffff88801672f8c8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801672f8e8 R13=ffff88801672f8d0 R14=ffff88801672f8c9 R15=ffff88801672f888 RIP=ffffffff81130706 RFL=00000246 [---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 00007fe1dfc46900 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=00007fe1e01fe0b0 CR3=000000000d67c000 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=2036343a39323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a39323a3530203132 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=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=00007f47d65b87b0 CR3=000000000d950000 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=efb7ee06e6e0e0aa474f07ff29d1d4a4 XMM02=000000000011c568eff9b2d0a8fce9cb XMM03=000000000011c6382c67c8bc2e329bc3 XMM04=95b1b6f206a0308400000000000ae988 XMM05=dfcdbad4f1609c3700000000001331c8 XMM06=806171799158d9670000000000133050 XMM07=e042d86d42eb936e0000000000123560 XMM08=a3df424f3eb62a5a000000000011c638 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000