[ 23.717465] BUG: Bad rss-counter state mm:0000000051eb5b9e type:MM_FILEPAGES val:33 [ 23.718236] BUG: Bad rss-counter state mm:0000000051eb5b9e type:MM_ANONPAGES val:22 [ 23.870145] ================================================================== [ 23.870920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.871695] Read of size 8 at addr ffff88800d5576b0 by task sshd/219 [ 23.872338] [ 23.872519] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.873226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.874035] Call Trace: [ 23.874482] [ 23.874719] dump_stack_lvl+0x91/0xf0 [ 23.875123] print_report+0xcc/0x620 [ 23.875527] ? __virt_addr_valid+0x102/0x340 [ 23.875982] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.876514] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877024] kasan_report+0xbe/0xf0 [ 23.877413] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.877922] vma_interval_tree_remove+0xc75/0xec0 [ 23.878428] vma_prepare+0xc54/0x11a0 [ 23.878827] __split_vma+0x5af/0x950 [ 23.879220] ? __pfx___split_vma+0x10/0x10 [ 23.879677] ? find_held_lock+0x2c/0x110 [ 23.880136] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.880588] ? lock_is_held_type+0x9f/0x120 [ 23.881054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.881571] ? mtree_range_walk+0x632/0x900 [ 23.882024] ? mas_walk+0x5c7/0x7c0 [ 23.882421] do_vmi_munmap+0x1f1/0x2b0 [ 23.882831] mmap_region+0x1f9/0x2660 [ 23.883234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.883658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.884279] ? __pfx_lock_acquire+0x10/0x10 [ 23.884724] ? __pfx_mmap_region+0x10/0x10 [ 23.885162] ? security_mmap_addr+0x7d/0xa0 [ 23.885612] ? get_unmapped_area+0x1f5/0x3f0 [ 23.886077] do_mmap+0x854/0xf00 [ 23.886451] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.886858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.887322] ksys_mmap_pgoff+0x3af/0x500 [ 23.887748] do_syscall_64+0x3f/0x90 [ 23.888157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.888739] RIP: 0033:0x7f60c0139d82 [ 23.889123] 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 [ 23.890914] RSP: 002b:00007ffe89fadc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.891673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60c0139d82 [ 23.892380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60bf573000 [ 23.893085] RBP: 00007f60bf573000 R08: 0000000000000009 R09: 0000000000001000 [ 23.893793] R10: 0000000000000812 R11: 0000000000000206 R12: 000056468218fb20 [ 23.894508] R13: 00007ffe89fadcb0 R14: 00007ffe89fadce0 R15: 00007ffe89fae040 [ 23.895215] [ 23.895458] [ 23.895635] Allocated by task 212: [ 23.895997] kasan_save_stack+0x22/0x50 [ 23.896436] kasan_set_track+0x25/0x30 [ 23.896853] __kasan_slab_alloc+0x59/0x70 [ 23.897279] kmem_cache_alloc+0x16b/0x370 [ 23.897706] vm_area_dup+0x20/0x160 [ 23.898083] __split_vma+0x170/0x950 [ 23.898464] split_vma+0xc6/0x110 [ 23.898823] mprotect_fixup+0x8d2/0xb30 [ 23.899248] do_mprotect_pkey+0x87e/0xd40 [ 23.899680] __x64_sys_mprotect+0x78/0xc0 [ 23.900120] do_syscall_64+0x3f/0x90 [ 23.900514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.901050] [ 23.901230] Freed by task 212: [ 23.901566] kasan_save_stack+0x22/0x50 [ 23.901988] kasan_set_track+0x25/0x30 [ 23.902403] kasan_save_free_info+0x2b/0x50 [ 23.902843] __kasan_slab_free+0x10a/0x190 [ 23.903295] kmem_cache_free+0x10d/0x4d0 [ 23.903720] rcu_core+0x8c8/0x2860 [ 23.904105] __do_softirq+0x1b7/0x7d4 [ 23.904503] [ 23.904688] Last potentially related work creation: [ 23.905181] kasan_save_stack+0x22/0x50 [ 23.905600] __kasan_record_aux_stack+0x8e/0xa0 [ 23.906071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.906600] remove_vma+0x139/0x170 [ 23.906973] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.907436] do_vmi_munmap+0x1f1/0x2b0 [ 23.907849] __vm_munmap+0x138/0x3a0 [ 23.908236] __x64_sys_munmap+0x59/0x80 [ 23.908658] do_syscall_64+0x3f/0x90 [ 23.909058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.909587] [ 23.909767] Second to last potentially related work creation: [ 23.910338] kasan_save_stack+0x22/0x50 [ 23.910760] __kasan_record_aux_stack+0x8e/0xa0 [ 23.911234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.911774] remove_vma+0x139/0x170 [ 23.912158] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.912625] do_vmi_munmap+0x1f1/0x2b0 [ 23.913033] mmap_region+0x1f9/0x2660 [ 23.913434] do_mmap+0x854/0xf00 [ 23.913793] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.914190] ksys_mmap_pgoff+0x3af/0x500 [ 23.914603] do_syscall_64+0x3f/0x90 [ 23.914991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.915524] [ 23.915768] The buggy address belongs to the object at ffff88800d557658 [ 23.915768] which belongs to the cache vm_area_struct of size 168 [ 23.916979] The buggy address is located 88 bytes inside of [ 23.916979] freed 168-byte region [ffff88800d557658, ffff88800d557700) [ 23.918148] [ 23.918328] The buggy address belongs to the physical page: [ 23.918871] page:00000000a5cae473 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd557 [ 23.919782] memcg:ffff88800e03ff01 [ 23.920149] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.920692] page_type: 0xffffffff() [ 23.921067] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ce00 dead000000000004 [ 23.921850] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e03ff01 [ 23.922607] page dumped because: kasan: bad access detected [ 23.923161] [ 23.923342] Memory state around the buggy address: [ 23.923826] ffff88800d557580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.924906] ffff88800d557600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.925929] >ffff88800d557680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.926933] ^ [ 23.927631] ffff88800d557700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 23.928715] ffff88800d557780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 23.929722] ================================================================== [ 23.931171] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.074634] BUG: Bad rss-counter state mm:0000000063721b4a type:MM_FILEPAGES val:33 [ 26.075806] BUG: Bad rss-counter state mm:0000000063721b4a type:MM_ANONPAGES val:22 [ 26.497709] BUG: Bad rss-counter state mm:00000000e7f2214b type:MM_FILEPAGES val:33 [ 26.498762] BUG: Bad rss-counter state mm:00000000e7f2214b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35846' (ECDSA) to the list of known hosts. 2023/06/21 04:41:15 fuzzer started 2023/06/21 04:41:16 dialing manager at localhost:36067 2023/06/21 04:41:16 checking machine... 2023/06/21 04:41:16 checking revisions... [ 27.217387] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:41:16 testing simple program... [ 27.264492] cgroup: Unknown subsys name 'net' [ 27.307036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:41:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d7a9c4 RCX=ffffffff810001cd RDX=0000000000000001 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff85d7a9c4 RSP=ffff88806ce099e0 R8 =ffffffff86073d08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d7a9c8 R13=ffffffff85d7a9c4 R14=ffffffff85d7a9c4 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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 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=00007ffccd842688 CR3=0000000009888000 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=2035313a31343a3430203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a323030363520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000056376a1ca000 RCX=0000000000000000 RDX=ffff888015a6b680 RSI=ffffffff8175cfc1 RDI=0000000000000007 RBP=0000000000000043 RSP=ffff88801673fcf8 R8 =0000000000000007 R9 =0000000000000043 R10=0000000000000043 R11=0000000000000000 R12=0000000016e4d067 R13=ffff88801bd9aa80 R14=ffff88801673fdf0 R15=0000000000000000 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb5c4146900 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=000056376a1ca000 CR3=000000001bcb4000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000