syzkaller login: [ 38.843759] BUG: Bad rss-counter state mm:000000007cb896a1 type:MM_FILEPAGES val:33 [ 38.845032] BUG: Bad rss-counter state mm:000000007cb896a1 type:MM_ANONPAGES val:22 [ 39.019996] ================================================================== [ 39.021137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.022325] Read of size 8 at addr ffff888018378df0 by task sshd/220 [ 39.023364] [ 39.023588] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.024442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.025423] Call Trace: [ 39.025746] [ 39.026031] dump_stack_lvl+0x91/0xf0 [ 39.026530] print_report+0xcc/0x620 [ 39.027020] ? __virt_addr_valid+0x102/0x340 [ 39.027571] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.028188] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.028807] kasan_report+0xbe/0xf0 [ 39.029286] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.029908] vma_interval_tree_remove+0xc75/0xec0 [ 39.030517] vma_prepare+0xc54/0x11a0 [ 39.031021] __split_vma+0x5af/0x950 [ 39.031496] ? __pfx___split_vma+0x10/0x10 [ 39.032033] ? find_held_lock+0x2c/0x110 [ 39.032563] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.033134] ? lock_is_held_type+0x9f/0x120 [ 39.033684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.034286] ? mtree_range_walk+0x632/0x900 [ 39.034862] ? mas_walk+0x5c7/0x7c0 [ 39.035341] do_vmi_munmap+0x1f1/0x2b0 [ 39.035840] mmap_region+0x1f9/0x2660 [ 39.036326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.036839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.037554] ? __pfx_lock_acquire+0x10/0x10 [ 39.038088] ? __pfx_mmap_region+0x10/0x10 [ 39.038619] ? security_mmap_addr+0x7d/0xa0 [ 39.039177] ? get_unmapped_area+0x1f5/0x3f0 [ 39.039727] do_mmap+0x854/0xf00 [ 39.040168] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.040665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.041228] ksys_mmap_pgoff+0x3af/0x500 [ 39.041738] do_syscall_64+0x3f/0x90 [ 39.042219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.042873] RIP: 0033:0x7f3797552d82 [ 39.043332] 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 [ 39.045447] RSP: 002b:00007ffd2fb00628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.046350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3797552d82 [ 39.047216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f379698c000 [ 39.048057] RBP: 00007f379698c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.048898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1c93f5f70 [ 39.049738] R13: 00007ffd2fb00640 R14: 00007ffd2fb00670 R15: 00007ffd2fb009d0 [ 39.050592] [ 39.050906] [ 39.051122] Allocated by task 213: [ 39.051550] kasan_save_stack+0x22/0x50 [ 39.052051] kasan_set_track+0x25/0x30 [ 39.052545] __kasan_slab_alloc+0x59/0x70 [ 39.053066] kmem_cache_alloc+0x16b/0x370 [ 39.053577] vm_area_dup+0x20/0x160 [ 39.054034] __split_vma+0x170/0x950 [ 39.054501] split_vma+0xc6/0x110 [ 39.054942] mprotect_fixup+0x8d2/0xb30 [ 39.055448] do_mprotect_pkey+0x87e/0xd40 [ 39.055971] __x64_sys_mprotect+0x78/0xc0 [ 39.056493] do_syscall_64+0x3f/0x90 [ 39.056968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.057614] [ 39.057830] Freed by task 213: [ 39.058217] kasan_save_stack+0x22/0x50 [ 39.058733] kasan_set_track+0x25/0x30 [ 39.059230] kasan_save_free_info+0x2b/0x50 [ 39.059768] __kasan_slab_free+0x10a/0x190 [ 39.060301] kmem_cache_free+0x10d/0x4d0 [ 39.060811] rcu_core+0x8c8/0x2860 [ 39.061255] __do_softirq+0x1b7/0x7d4 [ 39.061740] [ 39.061957] Last potentially related work creation: [ 39.062542] kasan_save_stack+0x22/0x50 [ 39.063052] __kasan_record_aux_stack+0x8e/0xa0 [ 39.063686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.064334] remove_vma+0x139/0x170 [ 39.064783] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.065338] do_vmi_munmap+0x1f1/0x2b0 [ 39.065825] __vm_munmap+0x138/0x3a0 [ 39.066290] __x64_sys_munmap+0x59/0x80 [ 39.066882] do_syscall_64+0x3f/0x90 [ 39.067400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.068064] [ 39.068284] The buggy address belongs to the object at ffff888018378d98 [ 39.068284] which belongs to the cache vm_area_struct of size 168 [ 39.069788] The buggy address is located 88 bytes inside of [ 39.069788] freed 168-byte region [ffff888018378d98, ffff888018378e40) [ 39.071257] [ 39.071481] The buggy address belongs to the physical page: [ 39.072168] page:00000000898e2024 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18378 [ 39.073281] memcg:ffff888019f0b301 [ 39.073727] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.074386] page_type: 0xffffffff() [ 39.074870] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.075821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f0b301 [ 39.076782] page dumped because: kasan: bad access detected [ 39.077460] [ 39.077691] Memory state around the buggy address: [ 39.078277] ffff888018378c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.079180] ffff888018378d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.080065] >ffff888018378d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.080969] ^ [ 39.081816] ffff888018378e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.082766] ffff888018378e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.083641] ================================================================== [ 39.084599] Disabling lock debugging due to kernel taint [ 41.455008] BUG: Bad rss-counter state mm:00000000c3b9201c type:MM_FILEPAGES val:33 [ 41.456023] BUG: Bad rss-counter state mm:00000000c3b9201c type:MM_ANONPAGES val:22 [ 41.941740] BUG: Bad rss-counter state mm:00000000ebf6715a type:MM_FILEPAGES val:33 [ 41.942934] BUG: Bad rss-counter state mm:00000000ebf6715a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40310' (ECDSA) to the list of known hosts. 2023/06/20 20:57:17 fuzzer started 2023/06/20 20:57:18 dialing manager at localhost:36067 2023/06/20 20:57:18 checking machine... 2023/06/20 20:57:18 checking revisions... [ 42.620062] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:57:18 testing simple program... [ 42.669424] cgroup: Unknown subsys name 'net' [ 42.709600] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:17 Registers: info registers vcpu 0 RAX=ffff888016438000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806312 RDI=ffff88806ce3de20 RBP=ffff88806ce3de20 RSP=ffff88800cc07a20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88800e8eed10 R12=ffff88800844f780 R13=ffffea00003a3b80 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d8654 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 00007fe768dc0900 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=00007ffcde534000 CR3=000000000d7ce000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9273347770 CR3=00000000094dc000 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=2037313a37353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a37353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000