[ 43.175574] BUG: Bad rss-counter state mm:00000000f1f9f035 type:MM_FILEPAGES val:33 [ 43.176285] BUG: Bad rss-counter state mm:00000000f1f9f035 type:MM_ANONPAGES val:22 [ 43.295140] ================================================================== [ 43.295890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.296647] Read of size 8 at addr ffff88801a2cea50 by task sshd/218 [ 43.297278] [ 43.297451] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.298151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.299036] Call Trace: [ 43.299294] [ 43.299524] dump_stack_lvl+0x91/0xf0 [ 43.299919] print_report+0xcc/0x620 [ 43.300309] ? __virt_addr_valid+0x102/0x340 [ 43.300776] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.301273] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.301774] kasan_report+0xbe/0xf0 [ 43.302154] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.302644] vma_interval_tree_remove+0xc75/0xec0 [ 43.303138] vma_prepare+0xc54/0x11a0 [ 43.303531] __split_vma+0x5af/0x950 [ 43.303918] ? __pfx___split_vma+0x10/0x10 [ 43.304345] ? find_held_lock+0x2c/0x110 [ 43.304791] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.305195] ? lock_is_held_type+0x9f/0x120 [ 43.305495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.305829] ? mtree_range_walk+0x632/0x900 [ 43.306135] ? mas_walk+0x5c7/0x7c0 [ 43.306396] do_vmi_munmap+0x1f1/0x2b0 [ 43.306666] mmap_region+0x1f9/0x2660 [ 43.306938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.307223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.307621] ? __pfx_lock_acquire+0x10/0x10 [ 43.307919] ? __pfx_mmap_region+0x10/0x10 [ 43.308220] ? security_mmap_addr+0x7d/0xa0 [ 43.308514] ? get_unmapped_area+0x1f5/0x3f0 [ 43.308828] do_mmap+0x854/0xf00 [ 43.309071] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.309347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.309658] ksys_mmap_pgoff+0x3af/0x500 [ 43.309938] do_syscall_64+0x3f/0x90 [ 43.310198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.310557] RIP: 0033:0x7fdcb2576d82 [ 43.310812] 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 [ 43.311998] RSP: 002b:00007fff7e163468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.312501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcb2576d82 [ 43.312983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcb19b0000 [ 43.313453] RBP: 00007fdcb19b0000 R08: 0000000000000009 R09: 0000000000001000 [ 43.313923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055765dd87b20 [ 43.314388] R13: 00007fff7e163480 R14: 00007fff7e1634b0 R15: 00007fff7e163810 [ 43.314860] [ 43.315023] [ 43.315144] Allocated by task 205: [ 43.315386] kasan_save_stack+0x22/0x50 [ 43.315661] kasan_set_track+0x25/0x30 [ 43.315936] __kasan_slab_alloc+0x59/0x70 [ 43.316229] kmem_cache_alloc+0x16b/0x370 [ 43.316515] vm_area_dup+0x20/0x160 [ 43.316776] __split_vma+0x170/0x950 [ 43.317034] split_vma+0xc6/0x110 [ 43.317274] mprotect_fixup+0x8d2/0xb30 [ 43.317556] do_mprotect_pkey+0x87e/0xd40 [ 43.317847] __x64_sys_mprotect+0x78/0xc0 [ 43.318137] do_syscall_64+0x3f/0x90 [ 43.318395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.318747] [ 43.318866] Freed by task 202: [ 43.319094] kasan_save_stack+0x22/0x50 [ 43.319371] kasan_set_track+0x25/0x30 [ 43.319641] kasan_save_free_info+0x2b/0x50 [ 43.319934] __kasan_slab_free+0x10a/0x190 [ 43.320230] kmem_cache_free+0x10d/0x4d0 [ 43.320510] rcu_core+0x8c8/0x2860 [ 43.320761] __do_softirq+0x1b7/0x7d4 [ 43.321023] [ 43.321141] Last potentially related work creation: [ 43.321462] kasan_save_stack+0x22/0x50 [ 43.321741] __kasan_record_aux_stack+0x8e/0xa0 [ 43.322060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.322417] remove_vma+0x139/0x170 [ 43.322665] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.322975] do_vmi_munmap+0x1f1/0x2b0 [ 43.323243] __vm_munmap+0x138/0x3a0 [ 43.323498] __x64_sys_munmap+0x59/0x80 [ 43.323774] do_syscall_64+0x3f/0x90 [ 43.324037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.324390] [ 43.324506] The buggy address belongs to the object at ffff88801a2ce9f8 [ 43.324506] which belongs to the cache vm_area_struct of size 168 [ 43.325335] The buggy address is located 88 bytes inside of [ 43.325335] freed 168-byte region [ffff88801a2ce9f8, ffff88801a2ceaa0) [ 43.326122] [ 43.326243] The buggy address belongs to the physical page: [ 43.326608] page:000000002a5358b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2ce [ 43.327205] memcg:ffff888019ce4301 [ 43.327440] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.327798] page_type: 0xffffffff() [ 43.328123] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.329449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ce4301 [ 43.330640] page dumped because: kasan: bad access detected [ 43.331501] [ 43.331780] Memory state around the buggy address: [ 43.332538] ffff88801a2ce900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.333661] ffff88801a2ce980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 43.334793] >ffff88801a2cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.335905] ^ [ 43.336844] ffff88801a2cea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 43.337658] ffff88801a2ceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.338381] ================================================================== [ 43.340671] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.376831] BUG: Bad rss-counter state mm:000000004488b2e3 type:MM_FILEPAGES val:33 [ 45.377988] BUG: Bad rss-counter state mm:000000004488b2e3 type:MM_ANONPAGES val:22 [ 45.760883] BUG: Bad rss-counter state mm:00000000067153e8 type:MM_FILEPAGES val:33 [ 45.761884] BUG: Bad rss-counter state mm:00000000067153e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45469' (ECDSA) to the list of known hosts. 2023/06/19 14:55:45 fuzzer started 2023/06/19 14:55:45 dialing manager at localhost:44161 2023/06/19 14:55:45 checking machine... 2023/06/19 14:55:45 checking revisions... [ 46.564317] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:55:45 testing simple program... [ 46.609087] cgroup: Unknown subsys name 'net' [ 46.648365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:55:25 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=00007ffe923222c8 CR3=000000000f158000 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=2034343a35353a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a35353a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800d897cc8 RCX=0000000000000001 RDX=1ffff1100d9e134f RSI=ffff88800d897c98 RDI=ffff88806cf09a78 RBP=ffff88800d890000 RSP=ffff88806cf099f8 R8 =0000000000000001 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=0000000000018f9b R12=ffff88806cf09ac8 R13=ffff88806cf09ab0 R14=ffff88800d897c98 R15=ffff88806cf09a68 RIP=ffffffff81131cac 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 00007f42bb3b6900 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=00007f82dc1a1650 CR3=000000000c4ec000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b13aa7ccde1a4a8200000000000ae988 XMM05=3a1c9452257cf9400000000000134298 XMM06=bdf2e299e47b49d50000000000132d18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000