[ 23.975273] BUG: Bad rss-counter state mm:00000000d51dc21e type:MM_FILEPAGES val:33 [ 23.976118] BUG: Bad rss-counter state mm:00000000d51dc21e type:MM_ANONPAGES val:22 [ 24.165068] ================================================================== [ 24.166017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.166923] Read of size 8 at addr ffff88801bc2a880 by task sshd/220 [ 24.167662] [ 24.167898] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.169093] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.170031] Call Trace: [ 24.170339] [ 24.170609] dump_stack_lvl+0x91/0xf0 [ 24.171104] print_report+0xcc/0x620 [ 24.171564] ? __virt_addr_valid+0x102/0x340 [ 24.172104] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.172693] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.173324] kasan_report+0xbe/0xf0 [ 24.173784] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174387] vma_interval_tree_remove+0xc75/0xec0 [ 24.175002] vma_prepare+0xc54/0x11a0 [ 24.175537] __split_vma+0x5af/0x950 [ 24.176064] ? __pfx___split_vma+0x10/0x10 [ 24.176640] ? find_held_lock+0x2c/0x110 [ 24.177238] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.177852] ? lock_is_held_type+0x9f/0x120 [ 24.178453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.179131] ? mtree_range_walk+0x632/0x900 [ 24.179735] ? mas_walk+0x5c7/0x7c0 [ 24.180263] do_vmi_munmap+0x1f1/0x2b0 [ 24.180803] mmap_region+0x1f9/0x2660 [ 24.181355] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.181915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.182703] ? __pfx_lock_acquire+0x10/0x10 [ 24.183300] ? __pfx_mmap_region+0x10/0x10 [ 24.183877] ? security_mmap_addr+0x7d/0xa0 [ 24.184468] ? get_unmapped_area+0x1f5/0x3f0 [ 24.185081] do_mmap+0x854/0xf00 [ 24.185581] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.186139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.186752] ksys_mmap_pgoff+0x3af/0x500 [ 24.187313] do_syscall_64+0x3f/0x90 [ 24.187836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.188563] RIP: 0033:0x7f51bd955d82 [ 24.189077] 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 [ 24.191432] RSP: 002b:00007ffff99078a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.192426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51bd955d82 [ 24.193376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51bcd8f000 [ 24.194300] RBP: 00007f51bcd8f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.195225] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6a53fdf70 [ 24.196147] R13: 00007ffff99078c0 R14: 00007ffff99078f0 R15: 00007ffff9907c50 [ 24.197087] [ 24.197447] [ 24.197687] Allocated by task 210: [ 24.198177] kasan_save_stack+0x22/0x50 [ 24.198714] kasan_set_track+0x25/0x30 [ 24.199254] __kasan_slab_alloc+0x59/0x70 [ 24.199809] kmem_cache_alloc+0x16b/0x370 [ 24.200367] vm_area_dup+0x20/0x160 [ 24.200854] __split_vma+0x170/0x950 [ 24.201389] split_vma+0xc6/0x110 [ 24.201854] mprotect_fixup+0x8d2/0xb30 [ 24.202404] do_mprotect_pkey+0x87e/0xd40 [ 24.202957] __x64_sys_mprotect+0x78/0xc0 [ 24.203526] do_syscall_64+0x3f/0x90 [ 24.204044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.204726] [ 24.204952] Freed by task 210: [ 24.205406] kasan_save_stack+0x22/0x50 [ 24.205941] kasan_set_track+0x25/0x30 [ 24.206480] kasan_save_free_info+0x2b/0x50 [ 24.207057] __kasan_slab_free+0x10a/0x190 [ 24.207617] kmem_cache_free+0x10d/0x4d0 [ 24.208170] rcu_core+0x8c8/0x2860 [ 24.208639] __do_softirq+0x1b7/0x7d4 [ 24.209209] [ 24.209563] Last potentially related work creation: [ 24.210211] kasan_save_stack+0x22/0x50 [ 24.210748] __kasan_record_aux_stack+0x8e/0xa0 [ 24.211375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.212066] remove_vma+0x139/0x170 [ 24.212544] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.213151] do_vmi_munmap+0x1f1/0x2b0 [ 24.213700] __vm_munmap+0x138/0x3a0 [ 24.214213] __x64_sys_munmap+0x59/0x80 [ 24.214746] do_syscall_64+0x3f/0x90 [ 24.215270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.215955] [ 24.216198] The buggy address belongs to the object at ffff88801bc2a828 [ 24.216198] which belongs to the cache vm_area_struct of size 168 [ 24.217787] The buggy address is located 88 bytes inside of [ 24.217787] freed 168-byte region [ffff88801bc2a828, ffff88801bc2a8d0) [ 24.219311] [ 24.219541] The buggy address belongs to the physical page: [ 24.220255] page:000000004a4d25b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2a [ 24.221449] memcg:ffff888019bb4c01 [ 24.221900] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.222609] page_type: 0xffffffff() [ 24.223103] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.224095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bb4c01 [ 24.225072] page dumped because: kasan: bad access detected [ 24.225800] [ 24.226037] Memory state around the buggy address: [ 24.226660] ffff88801bc2a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.227586] ffff88801bc2a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.228510] >ffff88801bc2a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.229442] ^ [ 24.229880] ffff88801bc2a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.230808] ffff88801bc2a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.231736] ================================================================== [ 24.232762] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.073332] BUG: Bad rss-counter state mm:000000005cc52958 type:MM_FILEPAGES val:33 [ 26.074059] BUG: Bad rss-counter state mm:000000005cc52958 type:MM_ANONPAGES val:22 [ 26.524193] BUG: Bad rss-counter state mm:000000000fa78590 type:MM_FILEPAGES val:33 [ 26.525193] BUG: Bad rss-counter state mm:000000000fa78590 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13529' (ECDSA) to the list of known hosts. 2023/06/20 22:35:00 fuzzer started 2023/06/20 22:35:00 dialing manager at localhost:36067 2023/06/20 22:35:00 checking machine... 2023/06/20 22:35:00 checking revisions... [ 27.240243] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:35:01 testing simple program... [ 27.290229] cgroup: Unknown subsys name 'net' [ 27.327784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017df6fa8 RCX=0000000000000000 RDX=ffff888017df71c8 RSI=ffffffff819d245e RDI=ffff888017df71c8 RBP=ffff88800d868000 RSP=ffff888015927d28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000010 R13=ffff88800d868050 R14=ffff888015eed608 R15=1ffff11002b24fa9 RIP=ffffffff819d2491 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 00007f325411a900 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=00007ffd68e9f000 CR3=00000000177f6000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007f5e914a5a60 CR3=000000000dbe0000 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=2030303a35333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a35333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000