[ 31.314169] BUG: Bad rss-counter state mm:0000000038355d0f type:MM_FILEPAGES val:33 [ 31.315201] BUG: Bad rss-counter state mm:0000000038355d0f type:MM_ANONPAGES val:22 [ 31.477814] ================================================================== [ 31.478936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.480061] Read of size 8 at addr ffff88801bca1968 by task sshd/219 [ 31.481121] [ 31.481382] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.482573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.483724] Call Trace: [ 31.484105] [ 31.484443] dump_stack_lvl+0x91/0xf0 [ 31.485021] print_report+0xcc/0x620 [ 31.485594] ? __virt_addr_valid+0x102/0x340 [ 31.486269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.487013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.487666] kasan_report+0xbe/0xf0 [ 31.488150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.488778] vma_interval_tree_remove+0xc75/0xec0 [ 31.489381] vma_prepare+0xc54/0x11a0 [ 31.489871] __split_vma+0x5af/0x950 [ 31.490362] ? __pfx___split_vma+0x10/0x10 [ 31.490907] ? find_held_lock+0x2c/0x110 [ 31.491435] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.492004] ? lock_is_held_type+0x9f/0x120 [ 31.492551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.493166] ? mtree_range_walk+0x632/0x900 [ 31.493734] ? mas_walk+0x5c7/0x7c0 [ 31.494218] do_vmi_munmap+0x1f1/0x2b0 [ 31.494743] mmap_region+0x1f9/0x2660 [ 31.495242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.495762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.496499] ? __pfx_lock_acquire+0x10/0x10 [ 31.497039] ? __pfx_mmap_region+0x10/0x10 [ 31.497579] ? security_mmap_addr+0x7d/0xa0 [ 31.498107] ? get_unmapped_area+0x1f5/0x3f0 [ 31.498682] do_mmap+0x854/0xf00 [ 31.499123] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.499623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.500200] ksys_mmap_pgoff+0x3af/0x500 [ 31.500713] do_syscall_64+0x3f/0x90 [ 31.501200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.501864] RIP: 0033:0x7fb584305d82 [ 31.502338] 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 [ 31.504473] RSP: 002b:00007fffe1ccc7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.505397] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb584305d82 [ 31.506285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb58373f000 [ 31.507155] RBP: 00007fb58373f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.508010] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b3ae1bb20 [ 31.508873] R13: 00007fffe1ccc7c0 R14: 00007fffe1ccc7f0 R15: 00007fffe1cccb50 [ 31.509758] [ 31.510060] [ 31.510283] Allocated by task 211: [ 31.510717] kasan_save_stack+0x22/0x50 [ 31.511237] kasan_set_track+0x25/0x30 [ 31.511732] __kasan_slab_alloc+0x59/0x70 [ 31.512272] kmem_cache_alloc+0x16b/0x370 [ 31.512801] vm_area_dup+0x20/0x160 [ 31.513262] __split_vma+0x170/0x950 [ 31.513735] split_vma+0xc6/0x110 [ 31.514177] mprotect_fixup+0x8d2/0xb30 [ 31.514710] do_mprotect_pkey+0x87e/0xd40 [ 31.515244] __x64_sys_mprotect+0x78/0xc0 [ 31.515782] do_syscall_64+0x3f/0x90 [ 31.516261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.516910] [ 31.517130] Freed by task 211: [ 31.517519] kasan_save_stack+0x22/0x50 [ 31.518024] kasan_set_track+0x25/0x30 [ 31.518531] kasan_save_free_info+0x2b/0x50 [ 31.519068] __kasan_slab_free+0x10a/0x190 [ 31.519607] kmem_cache_free+0x10d/0x4d0 [ 31.520143] rcu_core+0x8c8/0x2860 [ 31.520611] __do_softirq+0x1b7/0x7d4 [ 31.521098] [ 31.521315] Last potentially related work creation: [ 31.521944] kasan_save_stack+0x22/0x50 [ 31.522469] __kasan_record_aux_stack+0x8e/0xa0 [ 31.523050] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.523696] remove_vma+0x139/0x170 [ 31.524157] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.524714] do_vmi_munmap+0x1f1/0x2b0 [ 31.525197] __vm_munmap+0x138/0x3a0 [ 31.525663] __x64_sys_munmap+0x59/0x80 [ 31.526165] do_syscall_64+0x3f/0x90 [ 31.526654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.527298] [ 31.527515] The buggy address belongs to the object at ffff88801bca1910 [ 31.527515] which belongs to the cache vm_area_struct of size 168 [ 31.529016] The buggy address is located 88 bytes inside of [ 31.529016] freed 168-byte region [ffff88801bca1910, ffff88801bca19b8) [ 31.530434] [ 31.530660] The buggy address belongs to the physical page: [ 31.531332] page:000000007cca2413 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bca1 [ 31.532441] memcg:ffff88801bc82b01 [ 31.532869] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.533543] page_type: 0xffffffff() [ 31.534010] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.534973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc82b01 [ 31.535909] page dumped because: kasan: bad access detected [ 31.536576] [ 31.536798] Memory state around the buggy address: [ 31.537387] ffff88801bca1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.538260] ffff88801bca1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.539118] >ffff88801bca1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.539967] ^ [ 31.540749] ffff88801bca1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.541613] ffff88801bca1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.542478] ================================================================== [ 31.543522] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.609274] BUG: Bad rss-counter state mm:000000001f848cc1 type:MM_FILEPAGES val:33 [ 33.610234] BUG: Bad rss-counter state mm:000000001f848cc1 type:MM_ANONPAGES val:22 [ 34.075692] BUG: Bad rss-counter state mm:0000000012340783 type:MM_FILEPAGES val:33 [ 34.076697] BUG: Bad rss-counter state mm:0000000012340783 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22908' (ECDSA) to the list of known hosts. 2023/06/21 06:29:11 fuzzer started 2023/06/21 06:29:11 dialing manager at localhost:36067 2023/06/21 06:29:11 checking machine... 2023/06/21 06:29:11 checking revisions... [ 34.749459] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:29:11 testing simple program... [ 34.779680] cgroup: Unknown subsys name 'net' [ 34.810817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program [ 44.046562] kmemleak: 68 new suspected memory leaks (see /sys/kernel/debug/kmemleak) VM DIAGNOSIS: 06:29:11 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=00007f3f3b017040 CR3=0000000019844000 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=2030313a39323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f734007fe07 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=00007f734007fe07 RDI=ffffffff85652c60 RBP=00007f734007fe07 RSP=ffff88800be7f650 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800be7f778 R13=0000000000000000 R14=ffff888009083680 R15=0000000000000000 RIP=ffffffff814c845a 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 00007f733f4ed900 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=00007f733f4cc020 CR3=000000000dea2000 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