[ 23.934237] BUG: Bad rss-counter state mm:00000000955e580b type:MM_FILEPAGES val:33 [ 23.935046] BUG: Bad rss-counter state mm:00000000955e580b type:MM_ANONPAGES val:22 [ 24.091192] ================================================================== [ 24.092381] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.093785] Read of size 8 at addr ffff88800e083c20 by task sshd/220 [ 24.094708] [ 24.094968] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.096012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.097129] Call Trace: [ 24.097461] [ 24.097753] dump_stack_lvl+0x91/0xf0 [ 24.098247] print_report+0xcc/0x620 [ 24.098737] ? __virt_addr_valid+0x102/0x340 [ 24.099286] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.099916] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100530] kasan_report+0xbe/0xf0 [ 24.101029] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101649] vma_interval_tree_remove+0xc75/0xec0 [ 24.102254] vma_prepare+0xc54/0x11a0 [ 24.102734] __split_vma+0x5af/0x950 [ 24.103214] ? __pfx___split_vma+0x10/0x10 [ 24.103749] ? find_held_lock+0x2c/0x110 [ 24.104279] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.104873] ? lock_is_held_type+0x9f/0x120 [ 24.105412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.106027] ? mtree_range_walk+0x632/0x900 [ 24.106581] ? mas_walk+0x5c7/0x7c0 [ 24.107063] do_vmi_munmap+0x1f1/0x2b0 [ 24.107564] mmap_region+0x1f9/0x2660 [ 24.108047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.108553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.109281] ? __pfx_lock_acquire+0x10/0x10 [ 24.109817] ? __pfx_mmap_region+0x10/0x10 [ 24.110365] ? security_mmap_addr+0x7d/0xa0 [ 24.110915] ? get_unmapped_area+0x1f5/0x3f0 [ 24.111481] do_mmap+0x854/0xf00 [ 24.111947] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.112453] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.113036] ksys_mmap_pgoff+0x3af/0x500 [ 24.113549] do_syscall_64+0x3f/0x90 [ 24.114038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114701] RIP: 0033:0x7fda18205d82 [ 24.115168] 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 [ 24.117329] RSP: 002b:00007ffcf7e3dd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.118244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda18205d82 [ 24.119102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda1763f000 [ 24.119951] RBP: 00007fda1763f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.120817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3ffb02ec0 [ 24.121672] R13: 00007ffcf7e3dd50 R14: 00007ffcf7e3dd80 R15: 00007ffcf7e3e0e0 [ 24.122533] [ 24.122828] [ 24.123046] Allocated by task 212: [ 24.123476] kasan_save_stack+0x22/0x50 [ 24.123982] kasan_set_track+0x25/0x30 [ 24.124483] __kasan_slab_alloc+0x59/0x70 [ 24.125016] kmem_cache_alloc+0x16b/0x370 [ 24.125535] vm_area_dup+0x20/0x160 [ 24.125996] __split_vma+0x170/0x950 [ 24.126465] split_vma+0xc6/0x110 [ 24.126903] mprotect_fixup+0x8d2/0xb30 [ 24.127406] do_mprotect_pkey+0x87e/0xd40 [ 24.127936] __x64_sys_mprotect+0x78/0xc0 [ 24.128463] do_syscall_64+0x3f/0x90 [ 24.128956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.129605] [ 24.129820] Freed by task 212: [ 24.130215] kasan_save_stack+0x22/0x50 [ 24.130719] kasan_set_track+0x25/0x30 [ 24.131218] kasan_save_free_info+0x2b/0x50 [ 24.131746] __kasan_slab_free+0x10a/0x190 [ 24.132283] kmem_cache_free+0x10d/0x4d0 [ 24.132794] rcu_core+0x8c8/0x2860 [ 24.133243] __do_softirq+0x1b7/0x7d4 [ 24.133719] [ 24.133940] Last potentially related work creation: [ 24.134581] kasan_save_stack+0x22/0x50 [ 24.135093] __kasan_record_aux_stack+0x8e/0xa0 [ 24.135668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.136308] remove_vma+0x139/0x170 [ 24.136779] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.137344] do_vmi_munmap+0x1f1/0x2b0 [ 24.137833] __vm_munmap+0x138/0x3a0 [ 24.138300] __x64_sys_munmap+0x59/0x80 [ 24.138801] do_syscall_64+0x3f/0x90 [ 24.139275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.139924] [ 24.140140] The buggy address belongs to the object at ffff88800e083bc8 [ 24.140140] which belongs to the cache vm_area_struct of size 168 [ 24.141627] The buggy address is located 88 bytes inside of [ 24.141627] freed 168-byte region [ffff88800e083bc8, ffff88800e083c70) [ 24.143037] [ 24.143253] The buggy address belongs to the physical page: [ 24.143911] page:0000000063032a20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe083 [ 24.145015] memcg:ffff88800dce5d01 [ 24.145442] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.146089] page_type: 0xffffffff() [ 24.146535] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387bc0 dead000000000002 [ 24.147462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dce5d01 [ 24.148370] page dumped because: kasan: bad access detected [ 24.149041] [ 24.149258] Memory state around the buggy address: [ 24.149842] ffff88800e083b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.150708] ffff88800e083b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.151568] >ffff88800e083c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.152424] ^ [ 24.152982] ffff88800e083c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.153838] ffff88800e083d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.154694] ================================================================== [ 24.155634] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.845705] BUG: Bad rss-counter state mm:00000000912f44ad type:MM_FILEPAGES val:33 [ 26.846702] BUG: Bad rss-counter state mm:00000000912f44ad type:MM_ANONPAGES val:22 [ 27.323831] BUG: Bad rss-counter state mm:00000000de75b42a type:MM_FILEPAGES val:33 [ 27.325161] BUG: Bad rss-counter state mm:00000000de75b42a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6516' (ECDSA) to the list of known hosts. 2023/06/20 17:11:15 fuzzer started 2023/06/20 17:11:15 dialing manager at localhost:36067 2023/06/20 17:11:15 checking machine... 2023/06/20 17:11:15 checking revisions... [ 28.081374] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:11:15 testing simple program... [ 28.137153] cgroup: Unknown subsys name 'net' [ 28.212423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:14 Registers: info registers vcpu 0 RAX=0000000000000041 RBX=0000000000000440 RCX=000055f6cf8d0010 RDX=0000000000020180 RSI=000055f6cf919000 RDI=00007fb56cc2ab80 RBP=00007fb56cc2ab80 RSP=00007ffda56440c0 R8 =000055f6cf919790 R9 =00007ffda563d508 R10=000055f6cf9152c0 R11=0000000000000246 R12=000055f6cf919000 R13=000055f6cf919440 R14=00007ffda5644520 R15=00007ffda56442d0 RIP=00007fb56caf2abd RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb56c678900 00000000 00000000 GS =0000 0000000000000000 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=00007ffda563e000 CR3=000000000ddee000 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=00007f292caff1a0 CR3=000000000f246000 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=2034313a31313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31313a3731203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000