syzkaller login: [ 35.857605] BUG: Bad rss-counter state mm:00000000497601f0 type:MM_FILEPAGES val:33 [ 35.858808] BUG: Bad rss-counter state mm:00000000497601f0 type:MM_ANONPAGES val:22 [ 36.000468] ================================================================== [ 36.001380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.002426] Read of size 8 at addr ffff88800e184968 by task sshd/221 [ 36.003198] [ 36.003418] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.004289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.005543] Call Trace: [ 36.005943] [ 36.006317] dump_stack_lvl+0x91/0xf0 [ 36.006910] print_report+0xcc/0x620 [ 36.007518] ? __virt_addr_valid+0x102/0x340 [ 36.008217] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.009003] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.009742] kasan_report+0xbe/0xf0 [ 36.010351] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.011129] vma_interval_tree_remove+0xc75/0xec0 [ 36.011855] vma_prepare+0xc54/0x11a0 [ 36.012479] __split_vma+0x5af/0x950 [ 36.013087] ? __pfx___split_vma+0x10/0x10 [ 36.013748] ? find_held_lock+0x2c/0x110 [ 36.014419] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.015130] ? lock_is_held_type+0x9f/0x120 [ 36.015775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.016538] ? mtree_range_walk+0x632/0x900 [ 36.016882] ? mas_walk+0x5c7/0x7c0 [ 36.017195] do_vmi_munmap+0x1f1/0x2b0 [ 36.017507] mmap_region+0x1f9/0x2660 [ 36.017830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.018197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.018677] ? __pfx_lock_acquire+0x10/0x10 [ 36.019046] ? __pfx_mmap_region+0x10/0x10 [ 36.019396] ? security_mmap_addr+0x7d/0xa0 [ 36.019754] ? get_unmapped_area+0x1f5/0x3f0 [ 36.020135] do_mmap+0x854/0xf00 [ 36.020431] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.020771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.021151] ksys_mmap_pgoff+0x3af/0x500 [ 36.021495] do_syscall_64+0x3f/0x90 [ 36.021813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.022264] RIP: 0033:0x7f1ea7a43d82 [ 36.022573] 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 [ 36.024064] RSP: 002b:00007ffd3fbead88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.024679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ea7a43d82 [ 36.025268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ea6e7d000 [ 36.025851] RBP: 00007f1ea6e7d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.026442] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8e95f5ec0 [ 36.027030] R13: 00007ffd3fbeada0 R14: 00007ffd3fbeadd0 R15: 00007ffd3fbeb130 [ 36.027616] [ 36.027812] [ 36.027966] Allocated by task 214: [ 36.028277] kasan_save_stack+0x22/0x50 [ 36.028616] kasan_set_track+0x25/0x30 [ 36.028951] __kasan_slab_alloc+0x59/0x70 [ 36.029306] kmem_cache_alloc+0x16b/0x370 [ 36.029655] vm_area_dup+0x20/0x160 [ 36.029981] __split_vma+0x170/0x950 [ 36.030309] split_vma+0xc6/0x110 [ 36.030603] mprotect_fixup+0x8d2/0xb30 [ 36.030954] do_mprotect_pkey+0x87e/0xd40 [ 36.031311] __x64_sys_mprotect+0x78/0xc0 [ 36.031659] do_syscall_64+0x3f/0x90 [ 36.031991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.032430] [ 36.032571] Freed by task 214: [ 36.032848] kasan_save_stack+0x22/0x50 [ 36.033200] kasan_set_track+0x25/0x30 [ 36.033531] kasan_save_free_info+0x2b/0x50 [ 36.033891] __kasan_slab_free+0x10a/0x190 [ 36.034267] kmem_cache_free+0x10d/0x4d0 [ 36.034621] rcu_core+0x8c8/0x2860 [ 36.034925] __do_softirq+0x1b7/0x7d4 [ 36.035260] [ 36.035407] Last potentially related work creation: [ 36.035807] kasan_save_stack+0x22/0x50 [ 36.036169] __kasan_record_aux_stack+0x8e/0xa0 [ 36.036565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.037009] remove_vma+0x139/0x170 [ 36.037312] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.037698] do_vmi_munmap+0x1f1/0x2b0 [ 36.038047] __vm_munmap+0x138/0x3a0 [ 36.038364] __x64_sys_munmap+0x59/0x80 [ 36.038705] do_syscall_64+0x3f/0x90 [ 36.039038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.039483] [ 36.039633] The buggy address belongs to the object at ffff88800e184910 [ 36.039633] which belongs to the cache vm_area_struct of size 168 [ 36.040651] The buggy address is located 88 bytes inside of [ 36.040651] freed 168-byte region [ffff88800e184910, ffff88800e1849b8) [ 36.041602] [ 36.041747] The buggy address belongs to the physical page: [ 36.042213] page:0000000044c6543b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe184 [ 36.042962] memcg:ffff88800da70c01 [ 36.043255] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.043725] page_type: 0xffffffff() [ 36.044044] raw: 0100000000000200 ffff88800879fc80 ffffea0000384100 dead000000000007 [ 36.044660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da70c01 [ 36.045276] page dumped because: kasan: bad access detected [ 36.045730] [ 36.045881] Memory state around the buggy address: [ 36.046297] ffff88800e184800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.046878] ffff88800e184880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.047466] >ffff88800e184900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.048067] ^ [ 36.048594] ffff88800e184980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.049176] ffff88800e184a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.049759] ================================================================== [ 36.050508] Disabling lock debugging due to kernel taint [ 37.780521] BUG: Bad rss-counter state mm:00000000c2e978b0 type:MM_FILEPAGES val:33 [ 37.781535] BUG: Bad rss-counter state mm:00000000c2e978b0 type:MM_ANONPAGES val:22 [ 38.262662] BUG: Bad rss-counter state mm:00000000e2fff86f type:MM_FILEPAGES val:33 [ 38.264204] BUG: Bad rss-counter state mm:00000000e2fff86f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34434' (ECDSA) to the list of known hosts. 2023/06/19 16:11:40 fuzzer started 2023/06/19 16:11:41 dialing manager at localhost:44161 2023/06/19 16:11:41 checking machine... 2023/06/19 16:11:41 checking revisions... [ 39.019598] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:11:41 testing simple program... [ 39.070761] cgroup: Unknown subsys name 'net' [ 39.109190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:11:35 Registers: info registers vcpu 0 RAX=ffffea000059cec0 RBX=ffff88801673ba00 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff888017d77d00 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000001 R12=ffffffff81845c80 R13=ffffea0000336c00 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff8180ee01 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 00007fa607e93900 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=00007fa60844b0b0 CR3=000000000da54000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f114fee6570 CR3=000000000cb6a000 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=371edc82cd036487134b45480439d980 XMM02=000000000011f8d8eff9b2d0a8fce9cb XMM03=000000000011f9a82c67c8bc2e329bc3 XMM04=06134ad69749769200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c28 XMM06=c291bd5c70af25b90000000000133ab0 XMM07=e042d86d42eb936e0000000000124290 XMM08=b54cf527d4c2d60a000000000011f9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000