[ 29.357479] BUG: Bad rss-counter state mm:000000004f22c677 type:MM_FILEPAGES val:33 [ 29.358234] BUG: Bad rss-counter state mm:000000004f22c677 type:MM_ANONPAGES val:22 [ 29.486850] ================================================================== [ 29.487546] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.488273] Read of size 8 at addr ffff88800d464310 by task sshd/219 [ 29.488862] [ 29.489030] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.489695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.490548] Call Trace: [ 29.490794] [ 29.491013] dump_stack_lvl+0x91/0xf0 [ 29.491399] print_report+0xcc/0x620 [ 29.491776] ? __virt_addr_valid+0x102/0x340 [ 29.492198] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.492686] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.493167] kasan_report+0xbe/0xf0 [ 29.493529] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.494005] vma_interval_tree_remove+0xc75/0xec0 [ 29.494465] vma_prepare+0xc54/0x11a0 [ 29.494833] __split_vma+0x5af/0x950 [ 29.495194] ? __pfx___split_vma+0x10/0x10 [ 29.495621] ? find_held_lock+0x2c/0x110 [ 29.496031] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.496464] ? lock_is_held_type+0x9f/0x120 [ 29.496882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.497344] ? mtree_range_walk+0x632/0x900 [ 29.497767] ? mas_walk+0x5c7/0x7c0 [ 29.498132] do_vmi_munmap+0x1f1/0x2b0 [ 29.498509] mmap_region+0x1f9/0x2660 [ 29.498878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.499276] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.499835] ? __pfx_lock_acquire+0x10/0x10 [ 29.500244] ? __pfx_mmap_region+0x10/0x10 [ 29.500650] ? security_mmap_addr+0x7d/0xa0 [ 29.501060] ? get_unmapped_area+0x1f5/0x3f0 [ 29.501480] do_mmap+0x854/0xf00 [ 29.501819] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.502199] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.502630] ksys_mmap_pgoff+0x3af/0x500 [ 29.503020] do_syscall_64+0x3f/0x90 [ 29.503401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.503901] RIP: 0033:0x7ff5ba4ced82 [ 29.504251] 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 [ 29.505887] RSP: 002b:00007ffd49390488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.506585] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5ba4ced82 [ 29.507229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5b9908000 [ 29.507886] RBP: 00007ff5b9908000 R08: 0000000000000009 R09: 0000000000001000 [ 29.508534] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573a0885b20 [ 29.509185] R13: 00007ffd493904a0 R14: 00007ffd493904d0 R15: 00007ffd49390830 [ 29.509839] [ 29.510061] [ 29.510225] Allocated by task 212: [ 29.510552] kasan_save_stack+0x22/0x50 [ 29.510933] kasan_set_track+0x25/0x30 [ 29.511325] __kasan_slab_alloc+0x59/0x70 [ 29.511722] kmem_cache_alloc+0x16b/0x370 [ 29.512115] vm_area_dup+0x20/0x160 [ 29.512465] __split_vma+0x170/0x950 [ 29.512818] split_vma+0xc6/0x110 [ 29.513152] mprotect_fixup+0x8d2/0xb30 [ 29.513535] do_mprotect_pkey+0x87e/0xd40 [ 29.513933] __x64_sys_mprotect+0x78/0xc0 [ 29.514329] do_syscall_64+0x3f/0x90 [ 29.514690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.515178] [ 29.515349] Freed by task 212: [ 29.515647] kasan_save_stack+0x22/0x50 [ 29.516028] kasan_set_track+0x25/0x30 [ 29.516401] kasan_save_free_info+0x2b/0x50 [ 29.516806] __kasan_slab_free+0x10a/0x190 [ 29.517210] kmem_cache_free+0x10d/0x4d0 [ 29.517597] rcu_core+0x8c8/0x2860 [ 29.517934] __do_softirq+0x1b7/0x7d4 [ 29.518295] [ 29.518457] Last potentially related work creation: [ 29.518901] kasan_save_stack+0x22/0x50 [ 29.519286] __kasan_record_aux_stack+0x8e/0xa0 [ 29.519734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.520227] remove_vma+0x139/0x170 [ 29.520571] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.521003] do_vmi_munmap+0x1f1/0x2b0 [ 29.521372] __vm_munmap+0x138/0x3a0 [ 29.521727] __x64_sys_munmap+0x59/0x80 [ 29.522105] do_syscall_64+0x3f/0x90 [ 29.522463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.522946] [ 29.523113] The buggy address belongs to the object at ffff88800d4642b8 [ 29.523113] which belongs to the cache vm_area_struct of size 168 [ 29.524261] The buggy address is located 88 bytes inside of [ 29.524261] freed 168-byte region [ffff88800d4642b8, ffff88800d464360) [ 29.525338] [ 29.525500] The buggy address belongs to the physical page: [ 29.526003] page:00000000801dc3fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd464 [ 29.526831] memcg:ffff88800e0a2901 [ 29.527156] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.527696] page_type: 0xffffffff() [ 29.528038] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.528736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a2901 [ 29.529431] page dumped because: kasan: bad access detected [ 29.529938] [ 29.530100] Memory state around the buggy address: [ 29.530539] ffff88800d464200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.531185] ffff88800d464280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.531855] >ffff88800d464300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.532506] ^ [ 29.532861] ffff88800d464380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.533520] ffff88800d464400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.534172] ================================================================== [ 29.535023] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.933270] BUG: Bad rss-counter state mm:0000000089e99cde type:MM_FILEPAGES val:33 [ 30.934669] BUG: Bad rss-counter state mm:0000000089e99cde type:MM_ANONPAGES val:22 [ 31.333125] BUG: Bad rss-counter state mm:00000000dbc202fa type:MM_FILEPAGES val:33 [ 31.333865] BUG: Bad rss-counter state mm:00000000dbc202fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43792' (ECDSA) to the list of known hosts. 2023/06/19 22:08:16 fuzzer started 2023/06/19 22:08:16 dialing manager at localhost:44161 2023/06/19 22:08:16 checking machine... 2023/06/19 22:08:16 checking revisions... [ 31.991992] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:08:16 testing simple program... [ 32.044266] cgroup: Unknown subsys name 'net' [ 32.085356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000288 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8183a2cc RBP=ffff88806ce361a0 RSP=ffff8880158bfc68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffff88800d415080 R14=0000000000000dc0 R15=0000000000000001 RIP=ffffffff8450b935 RFL=00000046 [---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 00007f87a7bd6900 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=00007fff01c1e000 CR3=000000000dd50000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fbcd08a3c80 CR3=000000000b3e4000 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=818dca9eb881e9b82346fd77752968c0 XMM02=000000000011c720ec2efd57dc4c00df XMM03=000000000012313805faf10976cee13c XMM04=b73dbd99155a974700000000000ae988 XMM05=180311272a80005f0000000000133c60 XMM06=806171799158d96700000000001329e8 XMM07=e042d86d42eb936e00000000001233b8 XMM08=05faf10976cee13c000000000011c780 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000