[ 23.913344] BUG: Bad rss-counter state mm:00000000d6858f27 type:MM_FILEPAGES val:33 [ 23.914545] BUG: Bad rss-counter state mm:00000000d6858f27 type:MM_ANONPAGES val:22 [ 23.975858] ================================================================== [ 23.976747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.977654] Read of size 8 at addr ffff88800e9a3a50 by task sshd/219 [ 23.978401] [ 23.978614] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.979597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.980545] Call Trace: [ 23.980855] [ 23.981137] dump_stack_lvl+0x91/0xf0 [ 23.981631] print_report+0xcc/0x620 [ 23.982106] ? __virt_addr_valid+0x102/0x340 [ 23.982644] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.983245] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.983855] kasan_report+0xbe/0xf0 [ 23.984326] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.984928] vma_interval_tree_remove+0xc75/0xec0 [ 23.985515] vma_prepare+0xc54/0x11a0 [ 23.985982] __split_vma+0x5af/0x950 [ 23.986443] ? __pfx___split_vma+0x10/0x10 [ 23.986962] ? find_held_lock+0x2c/0x110 [ 23.987469] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.988045] ? lock_is_held_type+0x9f/0x120 [ 23.988575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.989170] ? mtree_range_walk+0x632/0x900 [ 23.989715] ? mas_walk+0x5c7/0x7c0 [ 23.990183] do_vmi_munmap+0x1f1/0x2b0 [ 23.990666] mmap_region+0x1f9/0x2660 [ 23.991136] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.991658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.992355] ? __pfx_lock_acquire+0x10/0x10 [ 23.992880] ? __pfx_mmap_region+0x10/0x10 [ 23.993400] ? security_mmap_addr+0x7d/0xa0 [ 23.993920] ? get_unmapped_area+0x1f5/0x3f0 [ 23.994459] do_mmap+0x854/0xf00 [ 23.994888] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.995371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.995929] ksys_mmap_pgoff+0x3af/0x500 [ 23.996428] do_syscall_64+0x3f/0x90 [ 23.996898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.997531] RIP: 0033:0x7fdf39dd2d82 [ 23.997981] 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 [ 24.000087] RSP: 002b:00007ffc96c40538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.000972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf39dd2d82 [ 24.001808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf3920c000 [ 24.002640] RBP: 00007fdf3920c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.003461] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e50faeec0 [ 24.004301] R13: 00007ffc96c40550 R14: 00007ffc96c40580 R15: 00007ffc96c408e0 [ 24.005139] [ 24.005424] [ 24.005636] Allocated by task 212: [ 24.006060] kasan_save_stack+0x22/0x50 [ 24.006557] kasan_set_track+0x25/0x30 [ 24.007045] __kasan_slab_alloc+0x59/0x70 [ 24.007569] kmem_cache_alloc+0x16b/0x370 [ 24.008074] vm_area_dup+0x20/0x160 [ 24.008517] __split_vma+0x170/0x950 [ 24.008971] split_vma+0xc6/0x110 [ 24.009408] mprotect_fixup+0x8d2/0xb30 [ 24.009898] do_mprotect_pkey+0x87e/0xd40 [ 24.010411] __x64_sys_mprotect+0x78/0xc0 [ 24.010922] do_syscall_64+0x3f/0x90 [ 24.011389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.012028] [ 24.012241] Freed by task 212: [ 24.012623] kasan_save_stack+0x22/0x50 [ 24.013115] kasan_set_track+0x25/0x30 [ 24.013601] kasan_save_free_info+0x2b/0x50 [ 24.014120] __kasan_slab_free+0x10a/0x190 [ 24.014645] kmem_cache_free+0x10d/0x4d0 [ 24.015139] rcu_core+0x8c8/0x2860 [ 24.015586] __do_softirq+0x1b7/0x7d4 [ 24.016054] [ 24.016265] Last potentially related work creation: [ 24.016836] kasan_save_stack+0x22/0x50 [ 24.017334] __kasan_record_aux_stack+0x8e/0xa0 [ 24.017891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.018529] remove_vma+0x139/0x170 [ 24.018968] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.019519] do_vmi_munmap+0x1f1/0x2b0 [ 24.020003] __vm_munmap+0x138/0x3a0 [ 24.020464] __x64_sys_munmap+0x59/0x80 [ 24.020948] do_syscall_64+0x3f/0x90 [ 24.021415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.022044] [ 24.022258] Second to last potentially related work creation: [ 24.022929] kasan_save_stack+0x22/0x50 [ 24.023427] __kasan_record_aux_stack+0x8e/0xa0 [ 24.023991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.024623] remove_vma+0x139/0x170 [ 24.025070] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.025612] do_vmi_munmap+0x1f1/0x2b0 [ 24.026086] mmap_region+0x1f9/0x2660 [ 24.026552] do_mmap+0x854/0xf00 [ 24.026993] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.027477] ksys_mmap_pgoff+0x3af/0x500 [ 24.027987] do_syscall_64+0x3f/0x90 [ 24.028451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029081] [ 24.029293] The buggy address belongs to the object at ffff88800e9a39f8 [ 24.029293] which belongs to the cache vm_area_struct of size 168 [ 24.030735] The buggy address is located 88 bytes inside of [ 24.030735] freed 168-byte region [ffff88800e9a39f8, ffff88800e9a3aa0) [ 24.032121] [ 24.032332] The buggy address belongs to the physical page: [ 24.032974] page:00000000c0ff14ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9a3 [ 24.034038] memcg:ffff88800da11b01 [ 24.034460] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.035096] page_type: 0xffffffff() [ 24.035550] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7180 0000000000000004 [ 24.036507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da11b01 [ 24.037437] page dumped because: kasan: bad access detected [ 24.038108] [ 24.038326] Memory state around the buggy address: [ 24.038915] ffff88800e9a3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.039796] ffff88800e9a3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.040673] >ffff88800e9a3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.041542] ^ [ 24.042268] ffff88800e9a3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.043133] ffff88800e9a3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.044014] ================================================================== [ 24.045032] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.991402] BUG: Bad rss-counter state mm:0000000017de8db7 type:MM_FILEPAGES val:33 [ 25.992460] BUG: Bad rss-counter state mm:0000000017de8db7 type:MM_ANONPAGES val:22 [ 26.449121] BUG: Bad rss-counter state mm:000000006f6b2fe0 type:MM_FILEPAGES val:33 [ 26.450325] BUG: Bad rss-counter state mm:000000006f6b2fe0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49167' (ECDSA) to the list of known hosts. 2023/06/20 21:37:04 fuzzer started 2023/06/20 21:37:04 dialing manager at localhost:36067 2023/06/20 21:37:04 checking machine... 2023/06/20 21:37:04 checking revisions... [ 27.110852] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:37:04 testing simple program... [ 27.147925] cgroup: Unknown subsys name 'net' [ 27.193732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:37:04 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=0000000000000001 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=00007ffc15194938 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=00007f91b559c510000055edb4482790 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=ffff88800edf08b8 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff11001dbe117 RSI=ffffffff87b89f80 RDI=ffff88800e2dc078 RBP=ffff88800c9b1b18 RSP=ffff8880169e7cf8 R8 =0000000000000001 R9 =ffffed1002d3cf97 R10=0000000000000003 R11=00000000000b6d7d R12=ffff88800e2dc068 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d25c5 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5c7e6e4700 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=00007f56e8bcea00 CR3=000000000eaac000 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=2033303a37333a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a37333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000