syzkaller login: [ 40.895357] BUG: Bad rss-counter state mm:000000008b828160 type:MM_FILEPAGES val:33 [ 40.896846] BUG: Bad rss-counter state mm:000000008b828160 type:MM_ANONPAGES val:22 [ 41.036045] ================================================================== [ 41.036978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.037943] Read of size 8 at addr ffff8880158b25c8 by task sshd/221 [ 41.038745] [ 41.038970] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.040005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.041000] Call Trace: [ 41.041332] [ 41.041621] dump_stack_lvl+0x91/0xf0 [ 41.042136] print_report+0xcc/0x620 [ 41.042629] ? __virt_addr_valid+0x102/0x340 [ 41.043192] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.043829] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.044492] kasan_report+0xbe/0xf0 [ 41.044984] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.045628] vma_interval_tree_remove+0xc75/0xec0 [ 41.046251] vma_prepare+0xc54/0x11a0 [ 41.046745] __split_vma+0x5af/0x950 [ 41.047232] ? __pfx___split_vma+0x10/0x10 [ 41.047789] ? find_held_lock+0x2c/0x110 [ 41.048352] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.048938] ? lock_is_held_type+0x9f/0x120 [ 41.049491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.050120] ? mtree_range_walk+0x632/0x900 [ 41.050692] ? mas_walk+0x5c7/0x7c0 [ 41.051186] do_vmi_munmap+0x1f1/0x2b0 [ 41.051708] mmap_region+0x1f9/0x2660 [ 41.052219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.052750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.053477] ? __pfx_lock_acquire+0x10/0x10 [ 41.054031] ? __pfx_mmap_region+0x10/0x10 [ 41.054577] ? security_mmap_addr+0x7d/0xa0 [ 41.055141] ? get_unmapped_area+0x1f5/0x3f0 [ 41.055705] do_mmap+0x854/0xf00 [ 41.056177] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.056693] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.057279] ksys_mmap_pgoff+0x3af/0x500 [ 41.057812] do_syscall_64+0x3f/0x90 [ 41.058310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.058980] RIP: 0033:0x7f843b97ed82 [ 41.059459] 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 [ 41.061680] RSP: 002b:00007ffdb012c848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.062624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f843b97ed82 [ 41.063503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f843adb8000 [ 41.064389] RBP: 00007f843adb8000 R08: 0000000000000009 R09: 0000000000001000 [ 41.065258] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f30f3ef70 [ 41.066134] R13: 00007ffdb012c860 R14: 00007ffdb012c890 R15: 00007ffdb012cbf0 [ 41.067033] [ 41.067337] [ 41.067556] Allocated by task 214: [ 41.068014] kasan_save_stack+0x22/0x50 [ 41.068536] kasan_set_track+0x25/0x30 [ 41.069052] __kasan_slab_alloc+0x59/0x70 [ 41.069593] kmem_cache_alloc+0x16b/0x370 [ 41.070132] vm_area_dup+0x20/0x160 [ 41.070610] __split_vma+0x170/0x950 [ 41.071091] split_vma+0xc6/0x110 [ 41.071546] mprotect_fixup+0x8d2/0xb30 [ 41.072068] do_mprotect_pkey+0x87e/0xd40 [ 41.072619] __x64_sys_mprotect+0x78/0xc0 [ 41.073154] do_syscall_64+0x3f/0x90 [ 41.073645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.074312] [ 41.074531] Freed by task 214: [ 41.074940] kasan_save_stack+0x22/0x50 [ 41.075455] kasan_set_track+0x25/0x30 [ 41.075973] kasan_save_free_info+0x2b/0x50 [ 41.076508] __kasan_slab_free+0x10a/0x190 [ 41.077053] kmem_cache_free+0x10d/0x4d0 [ 41.077562] rcu_core+0x8c8/0x2860 [ 41.078010] __do_softirq+0x1b7/0x7d4 [ 41.078487] [ 41.078700] Last potentially related work creation: [ 41.079284] kasan_save_stack+0x22/0x50 [ 41.079785] __kasan_record_aux_stack+0x8e/0xa0 [ 41.080369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.081010] remove_vma+0x139/0x170 [ 41.081458] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.082019] do_vmi_munmap+0x1f1/0x2b0 [ 41.082504] __vm_munmap+0x138/0x3a0 [ 41.082976] __x64_sys_munmap+0x59/0x80 [ 41.083467] do_syscall_64+0x3f/0x90 [ 41.083957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.084591] [ 41.084805] The buggy address belongs to the object at ffff8880158b2570 [ 41.084805] which belongs to the cache vm_area_struct of size 168 [ 41.086280] The buggy address is located 88 bytes inside of [ 41.086280] freed 168-byte region [ffff8880158b2570, ffff8880158b2618) [ 41.087672] [ 41.087892] The buggy address belongs to the physical page: [ 41.088556] page:00000000e4840065 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158b2 [ 41.089655] memcg:ffff88800c63fe01 [ 41.090075] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.090726] page_type: 0xffffffff() [ 41.091182] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.092124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c63fe01 [ 41.093040] page dumped because: kasan: bad access detected [ 41.093704] [ 41.093929] Memory state around the buggy address: [ 41.094509] ffff8880158b2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.095366] ffff8880158b2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 41.096220] >ffff8880158b2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.097072] ^ [ 41.097734] ffff8880158b2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.098588] ffff8880158b2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.099435] ================================================================== [ 41.100573] Disabling lock debugging due to kernel taint [ 43.904562] BUG: Bad rss-counter state mm:000000005b45a95a type:MM_FILEPAGES val:33 [ 43.905512] BUG: Bad rss-counter state mm:000000005b45a95a type:MM_ANONPAGES val:22 [ 44.413305] BUG: Bad rss-counter state mm:00000000151ea667 type:MM_FILEPAGES val:33 [ 44.414471] BUG: Bad rss-counter state mm:00000000151ea667 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14423' (ECDSA) to the list of known hosts. 2023/06/19 14:02:22 fuzzer started 2023/06/19 14:02:22 dialing manager at localhost:44161 2023/06/19 14:02:22 checking machine... 2023/06/19 14:02:22 checking revisions... [ 45.126636] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:02:22 testing simple program... [ 45.167612] cgroup: Unknown subsys name 'net' [ 45.221357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff35 RSI=ffffffff813782a8 RDI=ffff888008d7fa18 RBP=ffff888008d7f9e8 RSP=ffff888008d7f948 R8 =0000000000000001 R9 =ffff888008d7f990 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7fa18 R13=0000000000000000 R14=ffff888008d70000 R15=ffff8880097685c0 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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=00007f593bd4b650 CR3=000000000fb4a000 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=2031323a32303a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016cb3680 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800da674c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff888016c43f80 RIP=ffffffff81374466 RFL=00000293 [--S-A-C] 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 00007f30c397d900 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=00007f30c2e9c040 CR3=000000000cc16000 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=54de15d34026c482754b8ecb217dcbc6 XMM02=eff9b2d0a8fce9cb000000000011b988 XMM03=2c67c8bc2e329bc3000000000011bab0 XMM04=c5c027ee51f9942600000000000ae988 XMM05=99c2a55d6a3998000000000000133dc8 XMM06=c291bd5c70af25b90000000000132bb8 XMM07=fb795ef6d657705600000000001231d0 XMM08=2c67c8bc2e329bc3000000000011bab0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000