syzkaller login: [ 28.785649] BUG: Bad rss-counter state mm:000000008faed70a type:MM_FILEPAGES val:33 [ 28.786845] BUG: Bad rss-counter state mm:000000008faed70a type:MM_ANONPAGES val:22 [ 29.014567] ================================================================== [ 29.015709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.017047] Read of size 8 at addr ffff88800e016968 by task sshd/220 [ 29.017885] [ 29.018123] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.019084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.020127] Call Trace: [ 29.020468] [ 29.020788] dump_stack_lvl+0x91/0xf0 [ 29.021316] print_report+0xcc/0x620 [ 29.021843] ? __virt_addr_valid+0x102/0x340 [ 29.022444] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.023120] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.023794] kasan_report+0xbe/0xf0 [ 29.024315] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.025019] vma_interval_tree_remove+0xc75/0xec0 [ 29.025673] vma_prepare+0xc54/0x11a0 [ 29.026205] __split_vma+0x5af/0x950 [ 29.026712] ? __pfx___split_vma+0x10/0x10 [ 29.027274] ? find_held_lock+0x2c/0x110 [ 29.027844] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.028477] ? lock_is_held_type+0x9f/0x120 [ 29.029077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.029731] ? mtree_range_walk+0x632/0x900 [ 29.030328] ? mas_walk+0x5c7/0x7c0 [ 29.030839] do_vmi_munmap+0x1f1/0x2b0 [ 29.031370] mmap_region+0x1f9/0x2660 [ 29.031892] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.032452] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.033240] ? __pfx_lock_acquire+0x10/0x10 [ 29.033847] ? __pfx_mmap_region+0x10/0x10 [ 29.034437] ? security_mmap_addr+0x7d/0xa0 [ 29.035031] ? get_unmapped_area+0x1f5/0x3f0 [ 29.035641] do_mmap+0x854/0xf00 [ 29.036125] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.036687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.037326] ksys_mmap_pgoff+0x3af/0x500 [ 29.037937] do_syscall_64+0x3f/0x90 [ 29.038509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.039277] RIP: 0033:0x7f917e40bd82 [ 29.039823] 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 [ 29.042350] RSP: 002b:00007ffcb5569bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.043421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f917e40bd82 [ 29.044402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f917d845000 [ 29.045413] RBP: 00007f917d845000 R08: 0000000000000009 R09: 0000000000001000 [ 29.046407] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616ca457b20 [ 29.047387] R13: 00007ffcb5569bf0 R14: 00007ffcb5569c20 R15: 00007ffcb5569f80 [ 29.048385] [ 29.048729] [ 29.048981] Allocated by task 212: [ 29.049478] kasan_save_stack+0x22/0x50 [ 29.050060] kasan_set_track+0x25/0x30 [ 29.050632] __kasan_slab_alloc+0x59/0x70 [ 29.051241] kmem_cache_alloc+0x16b/0x370 [ 29.051842] vm_area_dup+0x20/0x160 [ 29.052377] __split_vma+0x170/0x950 [ 29.052931] split_vma+0xc6/0x110 [ 29.053441] mprotect_fixup+0x8d2/0xb30 [ 29.054019] do_mprotect_pkey+0x87e/0xd40 [ 29.054624] __x64_sys_mprotect+0x78/0xc0 [ 29.055231] do_syscall_64+0x3f/0x90 [ 29.055776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.056520] [ 29.056790] Freed by task 13: [ 29.057291] kasan_save_stack+0x22/0x50 [ 29.057885] kasan_set_track+0x25/0x30 [ 29.058458] kasan_save_free_info+0x2b/0x50 [ 29.059077] __kasan_slab_free+0x10a/0x190 [ 29.059697] kmem_cache_free+0x10d/0x4d0 [ 29.060282] rcu_core+0x8c8/0x2860 [ 29.060810] __do_softirq+0x1b7/0x7d4 [ 29.061356] [ 29.061605] Last potentially related work creation: [ 29.062284] kasan_save_stack+0x22/0x50 [ 29.062838] __kasan_record_aux_stack+0x8e/0xa0 [ 29.063472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.064167] remove_vma+0x139/0x170 [ 29.064661] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.065293] do_vmi_munmap+0x1f1/0x2b0 [ 29.065856] __vm_munmap+0x138/0x3a0 [ 29.066407] __x64_sys_munmap+0x59/0x80 [ 29.066987] do_syscall_64+0x3f/0x90 [ 29.067535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.068276] [ 29.068522] Second to last potentially related work creation: [ 29.069317] kasan_save_stack+0x22/0x50 [ 29.069895] __kasan_record_aux_stack+0x8e/0xa0 [ 29.070556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.071301] remove_vma+0x139/0x170 [ 29.071818] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.072456] do_vmi_munmap+0x1f1/0x2b0 [ 29.073027] mmap_region+0x1f9/0x2660 [ 29.073573] do_mmap+0x854/0xf00 [ 29.074072] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.074636] ksys_mmap_pgoff+0x3af/0x500 [ 29.075214] do_syscall_64+0x3f/0x90 [ 29.075760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.076501] [ 29.076766] The buggy address belongs to the object at ffff88800e016910 [ 29.076766] which belongs to the cache vm_area_struct of size 168 [ 29.078473] The buggy address is located 88 bytes inside of [ 29.078473] freed 168-byte region [ffff88800e016910, ffff88800e0169b8) [ 29.080106] [ 29.080354] The buggy address belongs to the physical page: [ 29.081128] page:000000007ba9df9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe016 [ 29.082279] memcg:ffff88800ed41301 [ 29.082722] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.083457] page_type: 0xffffffff() [ 29.083938] raw: 0100000000000200 ffff88800879fc80 ffffea0000365cc0 dead000000000007 [ 29.084923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed41301 [ 29.085827] page dumped because: kasan: bad access detected [ 29.086502] [ 29.086719] Memory state around the buggy address: [ 29.087304] ffff88800e016800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.088164] ffff88800e016880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.089046] >ffff88800e016900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.089915] ^ [ 29.090723] ffff88800e016980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.091602] ffff88800e016a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.092464] ================================================================== [ 29.093768] Disabling lock debugging due to kernel taint [ 30.985038] BUG: Bad rss-counter state mm:000000001b4982a7 type:MM_FILEPAGES val:33 [ 30.985694] BUG: Bad rss-counter state mm:000000001b4982a7 type:MM_ANONPAGES val:22 [ 31.380629] BUG: Bad rss-counter state mm:00000000bde9463e type:MM_FILEPAGES val:33 [ 31.381676] BUG: Bad rss-counter state mm:00000000bde9463e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47150' (ECDSA) to the list of known hosts. 2023/06/19 19:33:02 fuzzer started 2023/06/19 19:33:02 dialing manager at localhost:44161 2023/06/19 19:33:02 checking machine... 2023/06/19 19:33:02 checking revisions... [ 31.957467] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:02 testing simple program... [ 31.997152] cgroup: Unknown subsys name 'net' [ 32.040868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:02 Registers: info registers vcpu 0 RAX=1ffff11001182558 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015dd51c0 RSI=ffffffff818ea23d RDI=ffff888008c129a8 RBP=000000000000000c RSP=ffff88801641fdf8 R8 =0000000000000004 R9 =000000000000000c R10=0000000000000040 R11=0000000000000000 R12=000000000000000c R13=ffff888008c129a0 R14=dffffc0000000000 R15=000000000000005a RIP=ffffffff818ea275 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f566bfff700 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=00007f87084e7270 CR3=000000000e68c000 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=2032303a33333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100301aa08 RBX=dffffc0000000000 RCX=1ffff1100302812c RDX=ffffffff816e61c0 RSI=ffff8880193372c8 RDI=ffff888018140958 RBP=ffff88800dea44c8 RSP=ffff888016abf948 R8 =ffff88800dea44d0 R9 =000000000000000a R10=000000000000000a R11=0000000000000000 R12=ffff888018140950 R13=ffffed1003266e59 R14=ffff8880180d5040 R15=ffff8880193372c8 RIP=ffffffff844cb3f7 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8056d39900 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=00007f8056d18020 CR3=000000000ed24000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000