[ 30.336980] BUG: Bad rss-counter state mm:00000000f2e25953 type:MM_FILEPAGES val:33 [ 30.338988] BUG: Bad rss-counter state mm:00000000f2e25953 type:MM_ANONPAGES val:22 [ 30.511262] ================================================================== [ 30.512239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.513238] Read of size 8 at addr ffff88800dc545c8 by task sshd/220 [ 30.514115] [ 30.514348] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.515260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.516313] Call Trace: [ 30.516649] [ 30.516948] dump_stack_lvl+0x91/0xf0 [ 30.517472] print_report+0xcc/0x620 [ 30.517987] ? __virt_addr_valid+0x102/0x340 [ 30.518575] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.519238] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.519920] kasan_report+0xbe/0xf0 [ 30.520430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.521082] vma_interval_tree_remove+0xc75/0xec0 [ 30.521707] vma_prepare+0xc54/0x11a0 [ 30.522210] __split_vma+0x5af/0x950 [ 30.522714] ? __pfx___split_vma+0x10/0x10 [ 30.523277] ? find_held_lock+0x2c/0x110 [ 30.523834] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.524433] ? lock_is_held_type+0x9f/0x120 [ 30.525003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.525646] ? mtree_range_walk+0x632/0x900 [ 30.526235] ? mas_walk+0x5c7/0x7c0 [ 30.526739] do_vmi_munmap+0x1f1/0x2b0 [ 30.527257] mmap_region+0x1f9/0x2660 [ 30.527783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.528335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.529098] ? __pfx_lock_acquire+0x10/0x10 [ 30.529665] ? __pfx_mmap_region+0x10/0x10 [ 30.530218] ? security_mmap_addr+0x7d/0xa0 [ 30.530786] ? get_unmapped_area+0x1f5/0x3f0 [ 30.531375] do_mmap+0x854/0xf00 [ 30.531848] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.532375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.532971] ksys_mmap_pgoff+0x3af/0x500 [ 30.533512] do_syscall_64+0x3f/0x90 [ 30.534022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.534706] RIP: 0033:0x7ff8aa8acd82 [ 30.535183] 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 [ 30.537427] RSP: 002b:00007ffd811e8038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.538387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8aa8acd82 [ 30.539280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8a9ce6000 [ 30.540169] RBP: 00007ff8a9ce6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.541068] R10: 0000000000000812 R11: 0000000000000206 R12: 000056524d213b20 [ 30.541966] R13: 00007ffd811e8050 R14: 00007ffd811e8080 R15: 00007ffd811e83e0 [ 30.542871] [ 30.543177] [ 30.543408] Allocated by task 213: [ 30.543865] kasan_save_stack+0x22/0x50 [ 30.544404] kasan_set_track+0x25/0x30 [ 30.544927] __kasan_slab_alloc+0x59/0x70 [ 30.545486] kmem_cache_alloc+0x16b/0x370 [ 30.546034] vm_area_dup+0x20/0x160 [ 30.546518] __split_vma+0x170/0x950 [ 30.547014] split_vma+0xc6/0x110 [ 30.547497] mprotect_fixup+0x8d2/0xb30 [ 30.548036] do_mprotect_pkey+0x87e/0xd40 [ 30.548578] __x64_sys_mprotect+0x78/0xc0 [ 30.549134] do_syscall_64+0x3f/0x90 [ 30.549638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.550324] [ 30.550549] Freed by task 213: [ 30.550964] kasan_save_stack+0x22/0x50 [ 30.551503] kasan_set_track+0x25/0x30 [ 30.552034] kasan_save_free_info+0x2b/0x50 [ 30.552602] __kasan_slab_free+0x10a/0x190 [ 30.553175] kmem_cache_free+0x10d/0x4d0 [ 30.553722] rcu_core+0x8c8/0x2860 [ 30.554196] __do_softirq+0x1b7/0x7d4 [ 30.554704] [ 30.554931] Last potentially related work creation: [ 30.555552] kasan_save_stack+0x22/0x50 [ 30.556078] __kasan_record_aux_stack+0x8e/0xa0 [ 30.556689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.557368] remove_vma+0x139/0x170 [ 30.557853] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.558446] do_vmi_munmap+0x1f1/0x2b0 [ 30.558967] __vm_munmap+0x138/0x3a0 [ 30.559473] __x64_sys_munmap+0x59/0x80 [ 30.560003] do_syscall_64+0x3f/0x90 [ 30.560506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.561183] [ 30.561420] The buggy address belongs to the object at ffff88800dc54570 [ 30.561420] which belongs to the cache vm_area_struct of size 168 [ 30.562964] The buggy address is located 88 bytes inside of [ 30.562964] freed 168-byte region [ffff88800dc54570, ffff88800dc54618) [ 30.564456] [ 30.564684] The buggy address belongs to the physical page: [ 30.565380] page:0000000039a6ba28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc54 [ 30.566525] memcg:ffff88800cd07501 [ 30.566977] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.567683] page_type: 0xffffffff() [ 30.568162] raw: 0100000000000200 ffff8880087a0c80 ffffea0000404b40 0000000000000004 [ 30.569122] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd07501 [ 30.570081] page dumped because: kasan: bad access detected [ 30.570781] [ 30.571010] Memory state around the buggy address: [ 30.571624] ffff88800dc54480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.572517] ffff88800dc54500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.573421] >ffff88800dc54580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.574322] ^ [ 30.575026] ffff88800dc54600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.575942] ffff88800dc54680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.576843] ================================================================== [ 30.577929] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.501929] BUG: Bad rss-counter state mm:00000000401d554e type:MM_FILEPAGES val:33 [ 32.503080] BUG: Bad rss-counter state mm:00000000401d554e type:MM_ANONPAGES val:22 [ 32.945260] BUG: Bad rss-counter state mm:000000005e9bcb1c type:MM_FILEPAGES val:33 [ 32.946411] BUG: Bad rss-counter state mm:000000005e9bcb1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32537' (ECDSA) to the list of known hosts. 2023/06/21 01:25:47 fuzzer started 2023/06/21 01:25:47 dialing manager at localhost:36067 2023/06/21 01:25:47 checking machine... 2023/06/21 01:25:47 checking revisions... [ 33.614830] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:25:47 testing simple program... [ 33.661091] cgroup: Unknown subsys name 'net' [ 33.704277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:25:46 Registers: info registers vcpu 0 RAX=ffff88800dcbf720 RBX=ffff88800dcbfe40 RCX=00000000800d000b RDX=00000000800d000c RSI=ffff88800dcbfe40 RDI=ffff88800844f780 RBP=ffff8880195cfc08 RSP=ffff8880195cfb70 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea0000372fc0 R11=00000000800c000a R12=ffffea0000372fc0 R13=ffff88800dcbf720 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff8180973f RFL=00000242 [---Z---] 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 00007f48ffc9a900 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=00007ffcd7f9e000 CR3=00000000168b6000 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=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=00007f5acc98b7f0 CR3=0000000016aa4000 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=2036343a35323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a35323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000