[ 60.905176] BUG: Bad rss-counter state mm:000000003a7a0f53 type:MM_FILEPAGES val:33 [ 60.906358] BUG: Bad rss-counter state mm:000000003a7a0f53 type:MM_ANONPAGES val:22 [ 61.064799] ================================================================== [ 61.065745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.066680] Read of size 8 at addr ffff888019a11a50 by task sshd/226 [ 61.067441] [ 61.067665] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.068666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.069653] Call Trace: [ 61.069976] [ 61.070263] dump_stack_lvl+0x91/0xf0 [ 61.070763] print_report+0xcc/0x620 [ 61.071244] ? __virt_addr_valid+0x102/0x340 [ 61.071792] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.072401] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.073042] kasan_report+0xbe/0xf0 [ 61.073516] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.074137] vma_interval_tree_remove+0xc75/0xec0 [ 61.074748] vma_prepare+0xc54/0x11a0 [ 61.075224] __split_vma+0x5af/0x950 [ 61.075697] ? __pfx___split_vma+0x10/0x10 [ 61.076223] ? find_held_lock+0x2c/0x110 [ 61.076738] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.077305] ? lock_is_held_type+0x9f/0x120 [ 61.077842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.078436] ? mtree_range_walk+0x632/0x900 [ 61.078984] ? mas_walk+0x5c7/0x7c0 [ 61.079451] do_vmi_munmap+0x1f1/0x2b0 [ 61.079945] mmap_region+0x1f9/0x2660 [ 61.080421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.080948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.081651] ? __pfx_lock_acquire+0x10/0x10 [ 61.082183] ? __pfx_mmap_region+0x10/0x10 [ 61.082704] ? security_mmap_addr+0x7d/0xa0 [ 61.083226] ? get_unmapped_area+0x1f5/0x3f0 [ 61.083763] do_mmap+0x854/0xf00 [ 61.084202] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.084689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.085259] ksys_mmap_pgoff+0x3af/0x500 [ 61.085763] do_syscall_64+0x3f/0x90 [ 61.086240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.086883] RIP: 0033:0x7f244241cd82 [ 61.087330] 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 [ 61.089622] RSP: 002b:00007ffdd33cc178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.090528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f244241cd82 [ 61.091374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2441856000 [ 61.092209] RBP: 00007f2441856000 R08: 0000000000000009 R09: 0000000000001000 [ 61.093072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556484342d90 [ 61.093911] R13: 00007ffdd33cc190 R14: 00007ffdd33cc1c0 R15: 00007ffdd33cc520 [ 61.094750] [ 61.095037] [ 61.095249] Allocated by task 212: [ 61.095677] kasan_save_stack+0x22/0x50 [ 61.096178] kasan_set_track+0x25/0x30 [ 61.096672] __kasan_slab_alloc+0x59/0x70 [ 61.097201] kmem_cache_alloc+0x16b/0x370 [ 61.097716] vm_area_dup+0x20/0x160 [ 61.098168] __split_vma+0x170/0x950 [ 61.098631] split_vma+0xc6/0x110 [ 61.099071] mprotect_fixup+0x8d2/0xb30 [ 61.099573] do_mprotect_pkey+0x87e/0xd40 [ 61.100095] __x64_sys_mprotect+0x78/0xc0 [ 61.100605] do_syscall_64+0x3f/0x90 [ 61.101093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.101723] [ 61.101937] Freed by task 19: [ 61.102312] kasan_save_stack+0x22/0x50 [ 61.102811] kasan_set_track+0x25/0x30 [ 61.103298] kasan_save_free_info+0x2b/0x50 [ 61.103817] __kasan_slab_free+0x10a/0x190 [ 61.104341] kmem_cache_free+0x10d/0x4d0 [ 61.104864] rcu_core+0x8c8/0x2860 [ 61.105310] __do_softirq+0x1b7/0x7d4 [ 61.105783] [ 61.105995] Last potentially related work creation: [ 61.106578] kasan_save_stack+0x22/0x50 [ 61.107079] __kasan_record_aux_stack+0x8e/0xa0 [ 61.107662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.108299] remove_vma+0x139/0x170 [ 61.108752] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.109358] do_vmi_munmap+0x1f1/0x2b0 [ 61.109842] __vm_munmap+0x138/0x3a0 [ 61.110305] __x64_sys_munmap+0x59/0x80 [ 61.110806] do_syscall_64+0x3f/0x90 [ 61.111281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.111912] [ 61.112124] Second to last potentially related work creation: [ 61.112813] kasan_save_stack+0x22/0x50 [ 61.113337] __kasan_record_aux_stack+0x8e/0xa0 [ 61.113906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.114545] remove_vma+0x139/0x170 [ 61.114991] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.115540] do_vmi_munmap+0x1f1/0x2b0 [ 61.116024] mmap_region+0x1f9/0x2660 [ 61.116499] do_mmap+0x854/0xf00 [ 61.116936] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.117421] ksys_mmap_pgoff+0x3af/0x500 [ 61.117916] do_syscall_64+0x3f/0x90 [ 61.118387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.119031] [ 61.119248] The buggy address belongs to the object at ffff888019a119f8 [ 61.119248] which belongs to the cache vm_area_struct of size 168 [ 61.120708] The buggy address is located 88 bytes inside of [ 61.120708] freed 168-byte region [ffff888019a119f8, ffff888019a11aa0) [ 61.122103] [ 61.122316] The buggy address belongs to the physical page: [ 61.122971] page:0000000022cd5034 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a11 [ 61.124048] memcg:ffff88800e6ae501 [ 61.124473] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.125139] page_type: 0xffffffff() [ 61.125587] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a6f80 dead000000000002 [ 61.126502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6ae501 [ 61.127401] page dumped because: kasan: bad access detected [ 61.128059] [ 61.128270] Memory state around the buggy address: [ 61.128852] ffff888019a11900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.129711] ffff888019a11980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.130561] >ffff888019a11a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.131402] ^ [ 61.132104] ffff888019a11a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.132975] ffff888019a11b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.133820] ================================================================== [ 61.134906] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 63.033377] BUG: Bad rss-counter state mm:000000003e4547dc type:MM_FILEPAGES val:33 [ 63.034590] BUG: Bad rss-counter state mm:000000003e4547dc type:MM_ANONPAGES val:22 [ 63.390210] BUG: Bad rss-counter state mm:00000000538ec90b type:MM_FILEPAGES val:33 [ 63.390969] BUG: Bad rss-counter state mm:00000000538ec90b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31190' (ECDSA) to the list of known hosts. 2023/06/20 22:53:05 fuzzer started 2023/06/20 22:53:06 dialing manager at localhost:36067 2023/06/20 22:53:06 checking machine... 2023/06/20 22:53:06 checking revisions... [ 64.118500] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:53:06 testing simple program... [ 64.160289] cgroup: Unknown subsys name 'net' [ 64.217584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f264813a918 CR3=000000000d89c000 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=2035303a33353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff86139622 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff81130ad6 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 00007fbc78595900 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=00007fbc78574020 CR3=000000000e7c2000 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=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