[ 24.895129] BUG: Bad rss-counter state mm:000000006bad4b45 type:MM_FILEPAGES val:33 [ 24.896048] BUG: Bad rss-counter state mm:000000006bad4b45 type:MM_ANONPAGES val:22 [ 25.065896] ================================================================== [ 25.066793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.067705] Read of size 8 at addr ffff88800e1be798 by task sshd/219 [ 25.068578] [ 25.068795] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.069636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.070597] Call Trace: [ 25.070912] [ 25.071191] dump_stack_lvl+0x91/0xf0 [ 25.071663] print_report+0xcc/0x620 [ 25.072153] ? __virt_addr_valid+0x102/0x340 [ 25.072697] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.073306] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.073912] kasan_report+0xbe/0xf0 [ 25.074374] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.074990] vma_interval_tree_remove+0xc75/0xec0 [ 25.075592] vma_prepare+0xc54/0x11a0 [ 25.076063] __split_vma+0x5af/0x950 [ 25.076540] ? __pfx___split_vma+0x10/0x10 [ 25.077058] ? find_held_lock+0x2c/0x110 [ 25.077582] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.078141] ? lock_is_held_type+0x9f/0x120 [ 25.078667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.079262] ? mtree_range_walk+0x632/0x900 [ 25.079802] ? mas_walk+0x5c7/0x7c0 [ 25.080277] do_vmi_munmap+0x1f1/0x2b0 [ 25.080758] mmap_region+0x1f9/0x2660 [ 25.081229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.081733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.082430] ? __pfx_lock_acquire+0x10/0x10 [ 25.082950] ? __pfx_mmap_region+0x10/0x10 [ 25.083471] ? security_mmap_addr+0x7d/0xa0 [ 25.083998] ? get_unmapped_area+0x1f5/0x3f0 [ 25.084548] do_mmap+0x854/0xf00 [ 25.084974] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.085472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.086025] ksys_mmap_pgoff+0x3af/0x500 [ 25.086535] do_syscall_64+0x3f/0x90 [ 25.087013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.087642] RIP: 0033:0x7fd067421d82 [ 25.088099] 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 [ 25.090167] RSP: 002b:00007ffef26daa08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.091051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd067421d82 [ 25.091889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd06685b000 [ 25.092736] RBP: 00007fd06685b000 R08: 0000000000000009 R09: 0000000000001000 [ 25.093574] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bf4beeec0 [ 25.094391] R13: 00007ffef26daa20 R14: 00007ffef26daa50 R15: 00007ffef26dadb0 [ 25.095223] [ 25.095512] [ 25.095721] Allocated by task 208: [ 25.096148] kasan_save_stack+0x22/0x50 [ 25.096642] kasan_set_track+0x25/0x30 [ 25.097115] __kasan_slab_alloc+0x59/0x70 [ 25.097627] kmem_cache_alloc+0x16b/0x370 [ 25.098130] vm_area_dup+0x20/0x160 [ 25.098581] __split_vma+0x170/0x950 [ 25.099037] split_vma+0xc6/0x110 [ 25.099461] mprotect_fixup+0x8d2/0xb30 [ 25.099949] do_mprotect_pkey+0x87e/0xd40 [ 25.100459] __x64_sys_mprotect+0x78/0xc0 [ 25.100967] do_syscall_64+0x3f/0x90 [ 25.101433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.102067] [ 25.102278] Freed by task 13: [ 25.102653] kasan_save_stack+0x22/0x50 [ 25.103136] kasan_set_track+0x25/0x30 [ 25.103618] kasan_save_free_info+0x2b/0x50 [ 25.104153] __kasan_slab_free+0x10a/0x190 [ 25.104665] kmem_cache_free+0x10d/0x4d0 [ 25.105166] rcu_core+0x8c8/0x2860 [ 25.105624] __do_softirq+0x1b7/0x7d4 [ 25.106112] [ 25.106324] Last potentially related work creation: [ 25.106923] kasan_save_stack+0x22/0x50 [ 25.107411] __kasan_record_aux_stack+0x8e/0xa0 [ 25.107976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.108618] remove_vma+0x139/0x170 [ 25.109061] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.109609] do_vmi_munmap+0x1f1/0x2b0 [ 25.110078] __vm_munmap+0x138/0x3a0 [ 25.110544] __x64_sys_munmap+0x59/0x80 [ 25.111033] do_syscall_64+0x3f/0x90 [ 25.111496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.112141] [ 25.112352] Second to last potentially related work creation: [ 25.113016] kasan_save_stack+0x22/0x50 [ 25.113508] __kasan_record_aux_stack+0x8e/0xa0 [ 25.114061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.114683] remove_vma+0x139/0x170 [ 25.115118] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.115675] do_vmi_munmap+0x1f1/0x2b0 [ 25.116171] mmap_region+0x1f9/0x2660 [ 25.116635] do_mmap+0x854/0xf00 [ 25.117037] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.117501] ksys_mmap_pgoff+0x3af/0x500 [ 25.117976] do_syscall_64+0x3f/0x90 [ 25.118424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.119036] [ 25.119243] The buggy address belongs to the object at ffff88800e1be740 [ 25.119243] which belongs to the cache vm_area_struct of size 168 [ 25.120642] The buggy address is located 88 bytes inside of [ 25.120642] freed 168-byte region [ffff88800e1be740, ffff88800e1be7e8) [ 25.121968] [ 25.122174] The buggy address belongs to the physical page: [ 25.122799] page:000000008d08860c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1be [ 25.123814] memcg:ffff88800dffb901 [ 25.124223] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.124838] page_type: 0xffffffff() [ 25.125262] raw: 0100000000000200 ffff88800879fc80 ffffea000038d7c0 dead000000000008 [ 25.126132] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dffb901 [ 25.126977] page dumped because: kasan: bad access detected [ 25.127597] [ 25.127804] Memory state around the buggy address: [ 25.128367] ffff88800e1be680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.129164] ffff88800e1be700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.129964] >ffff88800e1be780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.130765] ^ [ 25.131228] ffff88800e1be800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.132029] ffff88800e1be880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.132853] ================================================================== [ 25.133832] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.809944] BUG: Bad rss-counter state mm:00000000ede3ddf1 type:MM_FILEPAGES val:33 [ 26.810972] BUG: Bad rss-counter state mm:00000000ede3ddf1 type:MM_ANONPAGES val:22 [ 27.258700] BUG: Bad rss-counter state mm:000000009d284467 type:MM_FILEPAGES val:33 [ 27.259747] BUG: Bad rss-counter state mm:000000009d284467 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54891' (ECDSA) to the list of known hosts. 2023/06/20 02:52:58 fuzzer started 2023/06/20 02:52:58 dialing manager at localhost:44161 2023/06/20 02:52:58 checking machine... 2023/06/20 02:52:58 checking revisions... [ 27.991105] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:52:58 testing simple program... [ 28.036690] cgroup: Unknown subsys name 'net' [ 28.076297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019ef7940 RCX=0000000000000001 RDX=1ffff110033def3e RSI=ffffffff8186d572 RDI=ffff888019ef794c RBP=ffff888019ef79f0 RSP=ffff888019ef7858 R8 =0000000000000001 R9 =ffff888019ef78b8 R10=0000000000038001 R11=0000000000024372 R12=ffff888019ef7940 R13=0000000000000000 R14=ffff888014359b40 R15=0000000000092cc0 RIP=ffffffff813ad4f7 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 00007f9d906fc900 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=00007f9d90cb1650 CR3=000000000dc26000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fff8547c5a8 CR3=000000000ec4e000 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=2037353a32353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000