[ 23.954148] BUG: Bad rss-counter state mm:000000003c38edc1 type:MM_FILEPAGES val:33 [ 23.955392] BUG: Bad rss-counter state mm:000000003c38edc1 type:MM_ANONPAGES val:22 [ 24.097675] ================================================================== [ 24.098585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.099532] Read of size 8 at addr ffff8880169c74e0 by task sshd/218 [ 24.100322] [ 24.100687] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.101553] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.102524] Call Trace: [ 24.102887] [ 24.103173] dump_stack_lvl+0x91/0xf0 [ 24.103667] print_report+0xcc/0x620 [ 24.104150] ? __virt_addr_valid+0x102/0x340 [ 24.104708] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.105324] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.105942] kasan_report+0xbe/0xf0 [ 24.106420] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.107067] vma_interval_tree_remove+0xc75/0xec0 [ 24.107662] vma_prepare+0xc54/0x11a0 [ 24.108137] __split_vma+0x5af/0x950 [ 24.108604] ? __pfx___split_vma+0x10/0x10 [ 24.109134] ? find_held_lock+0x2c/0x110 [ 24.109651] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.110216] ? lock_is_held_type+0x9f/0x120 [ 24.110752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.111368] ? mtree_range_walk+0x632/0x900 [ 24.111921] ? mas_walk+0x5c7/0x7c0 [ 24.112392] do_vmi_munmap+0x1f1/0x2b0 [ 24.112890] mmap_region+0x1f9/0x2660 [ 24.113377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.113889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.114597] ? __pfx_lock_acquire+0x10/0x10 [ 24.115149] ? __pfx_mmap_region+0x10/0x10 [ 24.115674] ? security_mmap_addr+0x7d/0xa0 [ 24.116215] ? get_unmapped_area+0x1f5/0x3f0 [ 24.116765] do_mmap+0x854/0xf00 [ 24.117200] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.117698] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.118256] ksys_mmap_pgoff+0x3af/0x500 [ 24.118761] do_syscall_64+0x3f/0x90 [ 24.119249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.119890] RIP: 0033:0x7f8eb89d0d82 [ 24.120342] 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 [ 24.122443] RSP: 002b:00007ffe71650188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.123349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8eb89d0d82 [ 24.124186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8eb7e0a000 [ 24.125026] RBP: 00007f8eb7e0a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.125869] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563999451ec0 [ 24.126719] R13: 00007ffe716501a0 R14: 00007ffe716501d0 R15: 00007ffe71650530 [ 24.127584] [ 24.127877] [ 24.128092] Allocated by task 211: [ 24.128518] kasan_save_stack+0x22/0x50 [ 24.129019] kasan_set_track+0x25/0x30 [ 24.129516] __kasan_slab_alloc+0x59/0x70 [ 24.130042] kmem_cache_alloc+0x16b/0x370 [ 24.130563] vm_area_dup+0x20/0x160 [ 24.131035] __split_vma+0x170/0x950 [ 24.131501] split_vma+0xc6/0x110 [ 24.131943] mprotect_fixup+0x8d2/0xb30 [ 24.132447] do_mprotect_pkey+0x87e/0xd40 [ 24.132970] __x64_sys_mprotect+0x78/0xc0 [ 24.133490] do_syscall_64+0x3f/0x90 [ 24.133961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.134597] [ 24.134811] Freed by task 211: [ 24.135216] kasan_save_stack+0x22/0x50 [ 24.135712] kasan_set_track+0x25/0x30 [ 24.136202] kasan_save_free_info+0x2b/0x50 [ 24.136731] __kasan_slab_free+0x10a/0x190 [ 24.137266] kmem_cache_free+0x10d/0x4d0 [ 24.137770] rcu_core+0x8c8/0x2860 [ 24.138214] __do_softirq+0x1b7/0x7d4 [ 24.138688] [ 24.138907] Last potentially related work creation: [ 24.139488] kasan_save_stack+0x22/0x50 [ 24.139985] __kasan_record_aux_stack+0x8e/0xa0 [ 24.140563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.141261] remove_vma+0x139/0x170 [ 24.141708] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.142260] do_vmi_munmap+0x1f1/0x2b0 [ 24.142741] __vm_munmap+0x138/0x3a0 [ 24.143222] __x64_sys_munmap+0x59/0x80 [ 24.143714] do_syscall_64+0x3f/0x90 [ 24.144189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.144831] [ 24.145048] The buggy address belongs to the object at ffff8880169c7488 [ 24.145048] which belongs to the cache vm_area_struct of size 168 [ 24.146506] The buggy address is located 88 bytes inside of [ 24.146506] freed 168-byte region [ffff8880169c7488, ffff8880169c7530) [ 24.147901] [ 24.148117] The buggy address belongs to the physical page: [ 24.148764] page:0000000049246161 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169c7 [ 24.149840] memcg:ffff8880103f5e01 [ 24.150266] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.150915] page_type: 0xffffffff() [ 24.151367] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0100 dead000000000004 [ 24.152283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880103f5e01 [ 24.153178] page dumped because: kasan: bad access detected [ 24.153835] [ 24.154056] Memory state around the buggy address: [ 24.154631] ffff8880169c7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.155507] ffff8880169c7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.156366] >ffff8880169c7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.157210] ^ [ 24.157961] ffff8880169c7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.158816] ffff8880169c7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.159673] ================================================================== [ 24.160661] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.093848] BUG: Bad rss-counter state mm:0000000085ef8926 type:MM_FILEPAGES val:33 [ 26.095093] BUG: Bad rss-counter state mm:0000000085ef8926 type:MM_ANONPAGES val:22 [ 26.638551] BUG: Bad rss-counter state mm:0000000035e115e1 type:MM_FILEPAGES val:33 [ 26.639744] BUG: Bad rss-counter state mm:0000000035e115e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50653' (ECDSA) to the list of known hosts. 2023/06/21 01:50:53 fuzzer started 2023/06/21 01:50:53 dialing manager at localhost:36067 2023/06/21 01:50:53 checking machine... 2023/06/21 01:50:53 checking revisions... [ 27.300257] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:50:53 testing simple program... [ 27.350984] cgroup: Unknown subsys name 'net' [ 27.400264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003407f83 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801a03fc00 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007fd9a3eb4900 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=00007ffcf7c7d000 CR3=00000000101de000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007f9d00e2a490 CR3=000000000ccae000 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=30353a3130203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323332 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000