[ 25.919410] BUG: Bad rss-counter state mm:00000000bcb02abe type:MM_FILEPAGES val:33 [ 25.920594] BUG: Bad rss-counter state mm:00000000bcb02abe type:MM_ANONPAGES val:22 [ 26.081865] ================================================================== [ 26.082805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.083766] Read of size 8 at addr ffff888009a77880 by task sshd/220 [ 26.084577] [ 26.084861] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.085748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.086747] Call Trace: [ 26.087082] [ 26.087375] dump_stack_lvl+0x91/0xf0 [ 26.087908] print_report+0xcc/0x620 [ 26.088404] ? __virt_addr_valid+0x102/0x340 [ 26.088966] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.089603] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.090236] kasan_report+0xbe/0xf0 [ 26.090718] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.091352] vma_interval_tree_remove+0xc75/0xec0 [ 26.091980] vma_prepare+0xc54/0x11a0 [ 26.092476] __split_vma+0x5af/0x950 [ 26.092960] ? __pfx___split_vma+0x10/0x10 [ 26.093512] ? find_held_lock+0x2c/0x110 [ 26.094045] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.094622] ? lock_is_held_type+0x9f/0x120 [ 26.095177] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.095800] ? mtree_range_walk+0x632/0x900 [ 26.096376] ? mas_walk+0x5c7/0x7c0 [ 26.096865] do_vmi_munmap+0x1f1/0x2b0 [ 26.097376] mmap_region+0x1f9/0x2660 [ 26.097875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.098405] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.099136] ? __pfx_lock_acquire+0x10/0x10 [ 26.099688] ? __pfx_mmap_region+0x10/0x10 [ 26.100249] ? security_mmap_addr+0x7d/0xa0 [ 26.100795] ? get_unmapped_area+0x1f5/0x3f0 [ 26.101360] do_mmap+0x854/0xf00 [ 26.101810] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.102322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.102903] ksys_mmap_pgoff+0x3af/0x500 [ 26.103434] do_syscall_64+0x3f/0x90 [ 26.103936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.104606] RIP: 0033:0x7f8d478b2d82 [ 26.105082] 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 [ 26.107280] RSP: 002b:00007fff24bd11f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.108225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d478b2d82 [ 26.109101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d46cec000 [ 26.109979] RBP: 00007f8d46cec000 R08: 0000000000000009 R09: 0000000000001000 [ 26.110849] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ae04ccd90 [ 26.111730] R13: 00007fff24bd1210 R14: 00007fff24bd1240 R15: 00007fff24bd15a0 [ 26.112634] [ 26.112935] [ 26.113158] Allocated by task 213: [ 26.113597] kasan_save_stack+0x22/0x50 [ 26.114111] kasan_set_track+0x25/0x30 [ 26.114615] __kasan_slab_alloc+0x59/0x70 [ 26.115158] kmem_cache_alloc+0x16b/0x370 [ 26.115694] vm_area_dup+0x20/0x160 [ 26.116173] __split_vma+0x170/0x950 [ 26.116655] split_vma+0xc6/0x110 [ 26.117112] mprotect_fixup+0x8d2/0xb30 [ 26.117636] do_mprotect_pkey+0x87e/0xd40 [ 26.118174] __x64_sys_mprotect+0x78/0xc0 [ 26.118713] do_syscall_64+0x3f/0x90 [ 26.119203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.119890] [ 26.120118] Freed by task 213: [ 26.120517] kasan_save_stack+0x22/0x50 [ 26.121038] kasan_set_track+0x25/0x30 [ 26.121548] kasan_save_free_info+0x2b/0x50 [ 26.122108] __kasan_slab_free+0x10a/0x190 [ 26.122655] kmem_cache_free+0x10d/0x4d0 [ 26.123186] rcu_core+0x8c8/0x2860 [ 26.123641] __do_softirq+0x1b7/0x7d4 [ 26.124143] [ 26.124355] Last potentially related work creation: [ 26.124934] kasan_save_stack+0x22/0x50 [ 26.125437] __kasan_record_aux_stack+0x8e/0xa0 [ 26.126009] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.126647] remove_vma+0x139/0x170 [ 26.127101] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.127698] do_vmi_munmap+0x1f1/0x2b0 [ 26.128197] __vm_munmap+0x138/0x3a0 [ 26.128674] __x64_sys_munmap+0x59/0x80 [ 26.129174] do_syscall_64+0x3f/0x90 [ 26.129650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.130286] [ 26.130500] Second to last potentially related work creation: [ 26.131190] kasan_save_stack+0x22/0x50 [ 26.131692] __kasan_record_aux_stack+0x8e/0xa0 [ 26.132278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.132920] remove_vma+0x139/0x170 [ 26.133374] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.133932] do_vmi_munmap+0x1f1/0x2b0 [ 26.134423] mmap_region+0x1f9/0x2660 [ 26.134901] do_mmap+0x854/0xf00 [ 26.135332] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.135834] ksys_mmap_pgoff+0x3af/0x500 [ 26.136338] do_syscall_64+0x3f/0x90 [ 26.136814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.137448] [ 26.137663] The buggy address belongs to the object at ffff888009a77828 [ 26.137663] which belongs to the cache vm_area_struct of size 168 [ 26.139124] The buggy address is located 88 bytes inside of [ 26.139124] freed 168-byte region [ffff888009a77828, ffff888009a778d0) [ 26.140531] [ 26.140746] The buggy address belongs to the physical page: [ 26.141410] page:00000000e1ff2179 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a77 [ 26.142484] memcg:ffff88800c748301 [ 26.142908] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.143558] page_type: 0xffffffff() [ 26.144037] raw: 0100000000000200 ffff88800879fc80 ffffea00003adf40 dead000000000002 [ 26.144952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c748301 [ 26.145854] page dumped because: kasan: bad access detected [ 26.146517] [ 26.146741] Memory state around the buggy address: [ 26.147323] ffff888009a77780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 26.148179] ffff888009a77800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 26.149032] >ffff888009a77880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 26.149884] ^ [ 26.150294] ffff888009a77900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.151152] ffff888009a77980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 26.152013] ================================================================== [ 26.153100] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.060644] BUG: Bad rss-counter state mm:00000000449351d9 type:MM_FILEPAGES val:33 [ 28.061859] BUG: Bad rss-counter state mm:00000000449351d9 type:MM_ANONPAGES val:22 [ 28.507159] BUG: Bad rss-counter state mm:000000001d7b0d60 type:MM_FILEPAGES val:33 [ 28.509219] BUG: Bad rss-counter state mm:000000001d7b0d60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4721' (ECDSA) to the list of known hosts. 2023/06/19 11:23:32 fuzzer started 2023/06/19 11:23:33 dialing manager at localhost:44161 2023/06/19 11:23:33 checking machine... 2023/06/19 11:23:33 checking revisions... [ 29.246679] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:33 testing simple program... [ 29.287723] cgroup: Unknown subsys name 'net' [ 29.332184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880166ef290 RCX=0000000000000001 RDX=1ffff11002cdde54 RSI=ffff8880166ef860 RDI=ffff8880166ef2a0 RBP=ffff8880166ef860 RSP=ffff8880166ef1e8 R8 =0000000000000001 R9 =ffff8880166ef2d0 R10=0000000000038001 R11=0000000000091b52 R12=0000000000000008 R13=ffff8880166e8000 R14=ffff8880166ef860 R15=ffff8880166ef290 RIP=ffffffff8113046e 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 00007f0b7e827900 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=00007ffc1106c000 CR3=000000000c5e8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f16eae4c200 CR3=000000000f158000 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=2032333a33323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a33323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000