syzkaller login: [ 73.358563] BUG: Bad rss-counter state mm:00000000a40c7bce type:MM_FILEPAGES val:33 [ 73.360133] BUG: Bad rss-counter state mm:00000000a40c7bce type:MM_ANONPAGES val:22 [ 73.499031] ================================================================== [ 73.500080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.501191] Read of size 8 at addr ffff888016bcbb38 by task sshd/227 [ 73.502084] [ 73.502293] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 73.503102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.504028] Call Trace: [ 73.504336] [ 73.504605] dump_stack_lvl+0x91/0xf0 [ 73.505084] print_report+0xcc/0x620 [ 73.505562] ? __virt_addr_valid+0x102/0x340 [ 73.506118] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.506738] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.507349] kasan_report+0xbe/0xf0 [ 73.507821] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.508441] vma_interval_tree_remove+0xc75/0xec0 [ 73.509047] vma_prepare+0xc54/0x11a0 [ 73.509528] __split_vma+0x5af/0x950 [ 73.509991] ? __pfx___split_vma+0x10/0x10 [ 73.510513] ? find_held_lock+0x2c/0x110 [ 73.511036] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.511594] ? lock_is_held_type+0x9f/0x120 [ 73.512128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.512742] ? mtree_range_walk+0x632/0x900 [ 73.513314] ? mas_walk+0x5c7/0x7c0 [ 73.513793] do_vmi_munmap+0x1f1/0x2b0 [ 73.514291] mmap_region+0x1f9/0x2660 [ 73.514772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.515272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.515992] ? __pfx_lock_acquire+0x10/0x10 [ 73.516536] ? __pfx_mmap_region+0x10/0x10 [ 73.517077] ? security_mmap_addr+0x7d/0xa0 [ 73.517606] ? get_unmapped_area+0x1f5/0x3f0 [ 73.518159] do_mmap+0x854/0xf00 [ 73.518606] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.519099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.519657] ksys_mmap_pgoff+0x3af/0x500 [ 73.520167] do_syscall_64+0x3f/0x90 [ 73.520647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.521292] RIP: 0033:0x7f14afda1d82 [ 73.521750] 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 [ 73.523878] RSP: 002b:00007fffc281b078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.524787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14afda1d82 [ 73.525645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14af1db000 [ 73.526494] RBP: 00007f14af1db000 R08: 0000000000000009 R09: 0000000000001000 [ 73.527349] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a26978f70 [ 73.528201] R13: 00007fffc281b090 R14: 00007fffc281b0c0 R15: 00007fffc281b420 [ 73.529058] [ 73.529353] [ 73.529573] Allocated by task 220: [ 73.530006] kasan_save_stack+0x22/0x50 [ 73.530515] kasan_set_track+0x25/0x30 [ 73.531006] __kasan_slab_alloc+0x59/0x70 [ 73.531536] kmem_cache_alloc+0x16b/0x370 [ 73.532046] vm_area_dup+0x20/0x160 [ 73.532498] __split_vma+0x170/0x950 [ 73.532992] split_vma+0xc6/0x110 [ 73.533438] mprotect_fixup+0x8d2/0xb30 [ 73.533935] do_mprotect_pkey+0x87e/0xd40 [ 73.534457] __x64_sys_mprotect+0x78/0xc0 [ 73.534985] do_syscall_64+0x3f/0x90 [ 73.535455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.536092] [ 73.536313] Freed by task 220: [ 73.536706] kasan_save_stack+0x22/0x50 [ 73.537222] kasan_set_track+0x25/0x30 [ 73.537709] kasan_save_free_info+0x2b/0x50 [ 73.538240] __kasan_slab_free+0x10a/0x190 [ 73.538777] kmem_cache_free+0x10d/0x4d0 [ 73.539282] rcu_core+0x8c8/0x2860 [ 73.539720] __do_softirq+0x1b7/0x7d4 [ 73.540197] [ 73.540417] Last potentially related work creation: [ 73.541041] kasan_save_stack+0x22/0x50 [ 73.541543] __kasan_record_aux_stack+0x8e/0xa0 [ 73.542112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.542758] remove_vma+0x139/0x170 [ 73.543308] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.543871] do_vmi_munmap+0x1f1/0x2b0 [ 73.544364] __vm_munmap+0x138/0x3a0 [ 73.544837] __x64_sys_munmap+0x59/0x80 [ 73.545341] do_syscall_64+0x3f/0x90 [ 73.545811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.546450] [ 73.546669] The buggy address belongs to the object at ffff888016bcbae0 [ 73.546669] which belongs to the cache vm_area_struct of size 168 [ 73.548152] The buggy address is located 88 bytes inside of [ 73.548152] freed 168-byte region [ffff888016bcbae0, ffff888016bcbb88) [ 73.549570] [ 73.549786] The buggy address belongs to the physical page: [ 73.550451] page:00000000e9d9879f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16bcb [ 73.551547] memcg:ffff88800f13d501 [ 73.551977] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.552624] page_type: 0xffffffff() [ 73.553076] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 73.553998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f13d501 [ 73.554902] page dumped because: kasan: bad access detected [ 73.555566] [ 73.555782] Memory state around the buggy address: [ 73.556355] ffff888016bcba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.557218] ffff888016bcba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 73.558080] >ffff888016bcbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.558934] ^ [ 73.559534] ffff888016bcbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 73.560384] ffff888016bcbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 73.561242] ================================================================== [ 73.562157] Disabling lock debugging due to kernel taint [ 75.607537] BUG: Bad rss-counter state mm:000000002471f781 type:MM_FILEPAGES val:33 [ 75.609160] BUG: Bad rss-counter state mm:000000002471f781 type:MM_ANONPAGES val:22 [ 76.139937] BUG: Bad rss-counter state mm:00000000bec27399 type:MM_FILEPAGES val:33 [ 76.141024] BUG: Bad rss-counter state mm:00000000bec27399 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10408' (ECDSA) to the list of known hosts. 2023/06/19 12:31:15 fuzzer started 2023/06/19 12:31:15 dialing manager at localhost:44161 2023/06/19 12:31:15 checking machine... 2023/06/19 12:31:15 checking revisions... [ 76.847243] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:31:15 testing simple program... [ 76.898003] cgroup: Unknown subsys name 'net' [ 76.941875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff6c954b48 CR3=0000000005482000 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=00007ff0fb7945100000558687445790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002db8ec5 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000000 RSI=000000000000000e RDI=ffff888016dc7628 RBP=dffffc0000000000 RSP=ffff888016dc7590 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000e R13=0000000000000000 R14=ffff888016dc7620 R15=1ffff11002db8f1d RIP=ffffffff813ad5ca 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 00007fdf9f0a5700 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=00007ffa42e8e840 CR3=0000000010222000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3833325b646873732034313a3133 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303731 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000