syzkaller login: [ 42.437973] BUG: Bad rss-counter state mm:000000003006b7a9 type:MM_FILEPAGES val:33 [ 42.439240] BUG: Bad rss-counter state mm:000000003006b7a9 type:MM_ANONPAGES val:22 [ 42.476700] ================================================================== [ 42.477695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.478659] Read of size 8 at addr ffff88800fe2e228 by task sshd/221 [ 42.479552] [ 42.479773] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.480650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.481616] Call Trace: [ 42.481940] [ 42.482226] dump_stack_lvl+0x91/0xf0 [ 42.482720] print_report+0xcc/0x620 [ 42.483228] ? __virt_addr_valid+0x102/0x340 [ 42.483788] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.484413] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.485033] kasan_report+0xbe/0xf0 [ 42.485514] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.486134] vma_interval_tree_remove+0xc75/0xec0 [ 42.486731] vma_prepare+0xc54/0x11a0 [ 42.487224] __split_vma+0x5af/0x950 [ 42.487705] ? __pfx___split_vma+0x10/0x10 [ 42.488233] ? find_held_lock+0x2c/0x110 [ 42.488761] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.489340] ? lock_is_held_type+0x9f/0x120 [ 42.489880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.490490] ? mtree_range_walk+0x632/0x900 [ 42.491063] ? mas_walk+0x5c7/0x7c0 [ 42.491542] do_vmi_munmap+0x1f1/0x2b0 [ 42.492034] mmap_region+0x1f9/0x2660 [ 42.492526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.493042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.493770] ? __pfx_lock_acquire+0x10/0x10 [ 42.494315] ? __pfx_mmap_region+0x10/0x10 [ 42.494851] ? security_mmap_addr+0x7d/0xa0 [ 42.495410] ? get_unmapped_area+0x1f5/0x3f0 [ 42.495963] do_mmap+0x854/0xf00 [ 42.496413] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.496918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.497486] ksys_mmap_pgoff+0x3af/0x500 [ 42.497995] do_syscall_64+0x3f/0x90 [ 42.498478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.499141] RIP: 0033:0x7f48ee04fd82 [ 42.499602] 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 [ 42.501732] RSP: 002b:00007fff95cceb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.502643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48ee04fd82 [ 42.503498] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48ed489000 [ 42.504342] RBP: 00007f48ed489000 R08: 0000000000000009 R09: 0000000000001000 [ 42.505197] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7ba12af70 [ 42.506060] R13: 00007fff95cceb70 R14: 00007fff95cceba0 R15: 00007fff95ccef00 [ 42.506919] [ 42.507224] [ 42.507444] Allocated by task 214: [ 42.507884] kasan_save_stack+0x22/0x50 [ 42.508406] kasan_set_track+0x25/0x30 [ 42.508906] __kasan_slab_alloc+0x59/0x70 [ 42.509436] kmem_cache_alloc+0x16b/0x370 [ 42.509956] vm_area_dup+0x20/0x160 [ 42.510418] __split_vma+0x170/0x950 [ 42.510891] split_vma+0xc6/0x110 [ 42.511359] mprotect_fixup+0x8d2/0xb30 [ 42.511862] do_mprotect_pkey+0x87e/0xd40 [ 42.512389] __x64_sys_mprotect+0x78/0xc0 [ 42.512910] do_syscall_64+0x3f/0x90 [ 42.513391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.514034] [ 42.514262] Freed by task 214: [ 42.514653] kasan_save_stack+0x22/0x50 [ 42.515164] kasan_set_track+0x25/0x30 [ 42.515658] kasan_save_free_info+0x2b/0x50 [ 42.516206] __kasan_slab_free+0x10a/0x190 [ 42.516763] kmem_cache_free+0x10d/0x4d0 [ 42.517283] rcu_core+0x8c8/0x2860 [ 42.517738] __do_softirq+0x1b7/0x7d4 [ 42.518218] [ 42.518441] Last potentially related work creation: [ 42.519046] kasan_save_stack+0x22/0x50 [ 42.519569] __kasan_record_aux_stack+0x8e/0xa0 [ 42.520151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.520800] remove_vma+0x139/0x170 [ 42.521258] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.521821] do_vmi_munmap+0x1f1/0x2b0 [ 42.522314] __vm_munmap+0x138/0x3a0 [ 42.522788] __x64_sys_munmap+0x59/0x80 [ 42.523295] do_syscall_64+0x3f/0x90 [ 42.523770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.524413] [ 42.524630] The buggy address belongs to the object at ffff88800fe2e1d0 [ 42.524630] which belongs to the cache vm_area_struct of size 168 [ 42.526102] The buggy address is located 88 bytes inside of [ 42.526102] freed 168-byte region [ffff88800fe2e1d0, ffff88800fe2e278) [ 42.527513] [ 42.527727] The buggy address belongs to the physical page: [ 42.528390] page:000000003989a2fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe2e [ 42.529471] memcg:ffff88800da8e601 [ 42.529900] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.530545] page_type: 0xffffffff() [ 42.530999] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.531934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da8e601 [ 42.532854] page dumped because: kasan: bad access detected [ 42.533520] [ 42.533737] Memory state around the buggy address: [ 42.534319] ffff88800fe2e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.535176] ffff88800fe2e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 42.536031] >ffff88800fe2e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 42.536894] ^ [ 42.537460] ffff88800fe2e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.538317] ffff88800fe2e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.539181] ================================================================== [ 42.540233] Disabling lock debugging due to kernel taint [ 44.454135] BUG: Bad rss-counter state mm:00000000b8b7f6a8 type:MM_FILEPAGES val:33 [ 44.455215] BUG: Bad rss-counter state mm:00000000b8b7f6a8 type:MM_ANONPAGES val:22 [ 44.930139] BUG: Bad rss-counter state mm:000000006978bde6 type:MM_FILEPAGES val:33 [ 44.931211] BUG: Bad rss-counter state mm:000000006978bde6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59018' (ECDSA) to the list of known hosts. 2023/06/19 11:17:45 fuzzer started 2023/06/19 11:17:45 dialing manager at localhost:44161 2023/06/19 11:17:45 checking machine... 2023/06/19 11:17:45 checking revisions... [ 45.630673] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:17:45 testing simple program... [ 45.683514] cgroup: Unknown subsys name 'net' [ 45.742026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff8661f000 RCX=ffffffff81007b82 RDX=ffffffff8542a6c0 RSI=ffffffff8661f000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88806ce099d0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b5420 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800cc0be80 RIP=ffffffff814c03b8 RFL=00000286 [--S--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 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=00005652d6da7fe0 CR3=0000000016738000 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=2034343a37313a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a37313a3131203931 XMM08=3d656e696c646d632022656369767265 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=00007efd40d87e20 CR3=000000000c430000 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=c965ea8bb8b39cae1240607e6cadc33e XMM02=000000000011d0a8eff9b2d0a8fce9cb XMM03=000000000011d1782c67c8bc2e329bc3 XMM04=fed8d605b0b0a94600000000000ae988 XMM05=e4cb8bb95a7664b60000000000134180 XMM06=47ccfd19eb763acb0000000000132fe8 XMM07=e042d86d42eb936e0000000000124910 XMM08=76c345ed1864a5a3000000000011d178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000