[ 25.390185] BUG: Bad rss-counter state mm:000000008f41d673 type:MM_FILEPAGES val:33 [ 25.390923] BUG: Bad rss-counter state mm:000000008f41d673 type:MM_ANONPAGES val:22 [ 25.497539] ================================================================== [ 25.498344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.499213] Read of size 8 at addr ffff88801342b6b0 by task sshd/219 [ 25.499897] [ 25.500118] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.500887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.501843] Call Trace: [ 25.502019] [ 25.502217] dump_stack_lvl+0x91/0xf0 [ 25.502564] print_report+0xcc/0x620 [ 25.502906] ? __virt_addr_valid+0x102/0x340 [ 25.503285] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.503735] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.504102] kasan_report+0xbe/0xf0 [ 25.504365] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.504845] vma_interval_tree_remove+0xc75/0xec0 [ 25.505233] vma_prepare+0xc54/0x11a0 [ 25.505510] __split_vma+0x5af/0x950 [ 25.505859] ? __pfx___split_vma+0x10/0x10 [ 25.506210] ? find_held_lock+0x2c/0x110 [ 25.506608] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.506966] ? lock_is_held_type+0x9f/0x120 [ 25.507377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.507818] ? mtree_range_walk+0x632/0x900 [ 25.508139] ? mas_walk+0x5c7/0x7c0 [ 25.508470] do_vmi_munmap+0x1f1/0x2b0 [ 25.508768] mmap_region+0x1f9/0x2660 [ 25.509091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.509405] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.509889] ? __pfx_lock_acquire+0x10/0x10 [ 25.510217] ? __pfx_mmap_region+0x10/0x10 [ 25.510514] ? security_mmap_addr+0x7d/0xa0 [ 25.510915] ? get_unmapped_area+0x1f5/0x3f0 [ 25.511270] do_mmap+0x854/0xf00 [ 25.511515] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.511829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.512180] ksys_mmap_pgoff+0x3af/0x500 [ 25.512460] do_syscall_64+0x3f/0x90 [ 25.512778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.513152] RIP: 0033:0x7f0b1f755d82 [ 25.513479] 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 [ 25.514949] RSP: 002b:00007ffd4045d5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.515636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b1f755d82 [ 25.516247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b1eb8f000 [ 25.516809] RBP: 00007f0b1eb8f000 R08: 0000000000000009 R09: 0000000000001000 [ 25.517380] R10: 0000000000000812 R11: 0000000000000206 R12: 000056073b049ec0 [ 25.518014] R13: 00007ffd4045d5d0 R14: 00007ffd4045d600 R15: 00007ffd4045d960 [ 25.518597] [ 25.518796] [ 25.518913] Allocated by task 211: [ 25.519166] kasan_save_stack+0x22/0x50 [ 25.519513] kasan_set_track+0x25/0x30 [ 25.519817] __kasan_slab_alloc+0x59/0x70 [ 25.520207] kmem_cache_alloc+0x16b/0x370 [ 25.520501] vm_area_dup+0x20/0x160 [ 25.520810] __split_vma+0x170/0x950 [ 25.521111] split_vma+0xc6/0x110 [ 25.521467] mprotect_fixup+0x8d2/0xb30 [ 25.521812] do_mprotect_pkey+0x87e/0xd40 [ 25.522185] __x64_sys_mprotect+0x78/0xc0 [ 25.522505] do_syscall_64+0x3f/0x90 [ 25.522865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.523297] [ 25.523465] Freed by task 19: [ 25.523708] kasan_save_stack+0x22/0x50 [ 25.524013] kasan_set_track+0x25/0x30 [ 25.524282] kasan_save_free_info+0x2b/0x50 [ 25.524665] __kasan_slab_free+0x10a/0x190 [ 25.525039] kmem_cache_free+0x10d/0x4d0 [ 25.525334] rcu_core+0x8c8/0x2860 [ 25.525610] __do_softirq+0x1b7/0x7d4 [ 25.526001] [ 25.526138] Last potentially related work creation: [ 25.526558] kasan_save_stack+0x22/0x50 [ 25.526891] __kasan_record_aux_stack+0x8e/0xa0 [ 25.527332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.527776] remove_vma+0x139/0x170 [ 25.528111] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.528479] do_vmi_munmap+0x1f1/0x2b0 [ 25.528829] __vm_munmap+0x138/0x3a0 [ 25.529119] __x64_sys_munmap+0x59/0x80 [ 25.529493] do_syscall_64+0x3f/0x90 [ 25.529791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.530240] [ 25.530365] The buggy address belongs to the object at ffff88801342b658 [ 25.530365] which belongs to the cache vm_area_struct of size 168 [ 25.531410] The buggy address is located 88 bytes inside of [ 25.531410] freed 168-byte region [ffff88801342b658, ffff88801342b700) [ 25.532409] [ 25.532536] The buggy address belongs to the physical page: [ 25.533005] page:0000000013874245 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1342b [ 25.533650] memcg:ffff88800cd6de01 [ 25.533998] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.534459] page_type: 0xffffffff() [ 25.534706] raw: 0100000000000200 ffff88800879fc80 ffffea00005addc0 dead000000000008 [ 25.535347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd6de01 [ 25.535955] page dumped because: kasan: bad access detected [ 25.536396] [ 25.536517] Memory state around the buggy address: [ 25.536865] ffff88801342b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.537376] ffff88801342b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 25.537884] >ffff88801342b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.538399] ^ [ 25.538754] ffff88801342b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.539287] ffff88801342b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.539797] ================================================================== [ 25.540365] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.352040] BUG: Bad rss-counter state mm:00000000bf4f9a88 type:MM_FILEPAGES val:33 [ 28.353024] BUG: Bad rss-counter state mm:00000000bf4f9a88 type:MM_ANONPAGES val:22 [ 28.944098] BUG: Bad rss-counter state mm:00000000dbed5748 type:MM_FILEPAGES val:33 [ 28.945131] BUG: Bad rss-counter state mm:00000000dbed5748 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21424' (ECDSA) to the list of known hosts. 2023/06/20 06:26:48 fuzzer started 2023/06/20 06:26:48 dialing manager at localhost:44161 2023/06/20 06:26:48 checking machine... 2023/06/20 06:26:48 checking revisions... [ 29.580925] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:26:48 testing simple program... [ 29.617495] cgroup: Unknown subsys name 'net' [ 29.755585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:46 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=0000000000000001 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=0000562b3fbb8218 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=00007ff3dc56b510000055649f689790 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=ffffffff84531da7 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09f78 RDI=ffff88806cf09f78 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d1680 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f80 R15=ffff88806cf09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f49e0ccd700 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=00007f709b670650 CR3=0000000018790000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732038343a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383333 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000