syzkaller login: [ 35.621149] BUG: Bad rss-counter state mm:00000000aee3b74e type:MM_FILEPAGES val:33 [ 35.622241] BUG: Bad rss-counter state mm:00000000aee3b74e type:MM_ANONPAGES val:22 [ 35.790926] ================================================================== [ 35.792002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.793009] Read of size 8 at addr ffff88800c6d6a50 by task sshd/219 [ 35.793809] [ 35.794037] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.794963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.795978] Call Trace: [ 35.796313] [ 35.796616] dump_stack_lvl+0x91/0xf0 [ 35.797130] print_report+0xcc/0x620 [ 35.797637] ? __virt_addr_valid+0x102/0x340 [ 35.798212] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.798880] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.799529] kasan_report+0xbe/0xf0 [ 35.800031] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.800678] vma_interval_tree_remove+0xc75/0xec0 [ 35.801312] vma_prepare+0xc54/0x11a0 [ 35.801821] __split_vma+0x5af/0x950 [ 35.802318] ? __pfx___split_vma+0x10/0x10 [ 35.802894] ? find_held_lock+0x2c/0x110 [ 35.803451] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.804049] ? lock_is_held_type+0x9f/0x120 [ 35.804621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.805259] ? mtree_range_walk+0x632/0x900 [ 35.805843] ? mas_walk+0x5c7/0x7c0 [ 35.806342] do_vmi_munmap+0x1f1/0x2b0 [ 35.806885] mmap_region+0x1f9/0x2660 [ 35.807397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.807945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.808722] ? __pfx_lock_acquire+0x10/0x10 [ 35.809280] ? __pfx_mmap_region+0x10/0x10 [ 35.809842] ? security_mmap_addr+0x7d/0xa0 [ 35.810403] ? get_unmapped_area+0x1f5/0x3f0 [ 35.811000] do_mmap+0x854/0xf00 [ 35.811467] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.811989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.812582] ksys_mmap_pgoff+0x3af/0x500 [ 35.813118] do_syscall_64+0x3f/0x90 [ 35.813635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.814312] RIP: 0033:0x7f317c818d82 [ 35.814808] 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 [ 35.817053] RSP: 002b:00007ffcc8624348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.818016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f317c818d82 [ 35.818925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f317bc52000 [ 35.819826] RBP: 00007f317bc52000 R08: 0000000000000009 R09: 0000000000001000 [ 35.820722] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5f9d85d90 [ 35.821623] R13: 00007ffcc8624360 R14: 00007ffcc8624390 R15: 00007ffcc86246f0 [ 35.822532] [ 35.822855] [ 35.823083] Allocated by task 212: [ 35.823539] kasan_save_stack+0x22/0x50 [ 35.824072] kasan_set_track+0x25/0x30 [ 35.824595] __kasan_slab_alloc+0x59/0x70 [ 35.825153] kmem_cache_alloc+0x16b/0x370 [ 35.825700] vm_area_dup+0x20/0x160 [ 35.826179] __split_vma+0x170/0x950 [ 35.826679] split_vma+0xc6/0x110 [ 35.827149] mprotect_fixup+0x8d2/0xb30 [ 35.827680] do_mprotect_pkey+0x87e/0xd40 [ 35.828228] __x64_sys_mprotect+0x78/0xc0 [ 35.828789] do_syscall_64+0x3f/0x90 [ 35.829289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.829967] [ 35.830197] Freed by task 212: [ 35.830615] kasan_save_stack+0x22/0x50 [ 35.831176] kasan_set_track+0x25/0x30 [ 35.831702] kasan_save_free_info+0x2b/0x50 [ 35.832266] __kasan_slab_free+0x10a/0x190 [ 35.832899] kmem_cache_free+0x10d/0x4d0 [ 35.833441] rcu_core+0x8c8/0x2860 [ 35.833924] __do_softirq+0x1b7/0x7d4 [ 35.834435] [ 35.834672] Last potentially related work creation: [ 35.835292] kasan_save_stack+0x22/0x50 [ 35.835826] __kasan_record_aux_stack+0x8e/0xa0 [ 35.836435] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.837114] remove_vma+0x139/0x170 [ 35.837594] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.838186] do_vmi_munmap+0x1f1/0x2b0 [ 35.838710] __vm_munmap+0x138/0x3a0 [ 35.839210] __x64_sys_munmap+0x59/0x80 [ 35.839733] do_syscall_64+0x3f/0x90 [ 35.840232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.840905] [ 35.841133] The buggy address belongs to the object at ffff88800c6d69f8 [ 35.841133] which belongs to the cache vm_area_struct of size 168 [ 35.842700] The buggy address is located 88 bytes inside of [ 35.842700] freed 168-byte region [ffff88800c6d69f8, ffff88800c6d6aa0) [ 35.844191] [ 35.844422] The buggy address belongs to the physical page: [ 35.845119] page:00000000dae4750e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d6 [ 35.846266] memcg:ffff88800e5f9b01 [ 35.846728] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.847411] page_type: 0xffffffff() [ 35.847888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.848864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f9b01 [ 35.849821] page dumped because: kasan: bad access detected [ 35.850525] [ 35.850776] Memory state around the buggy address: [ 35.851393] ffff88800c6d6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.852302] ffff88800c6d6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.853215] >ffff88800c6d6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.854116] ^ [ 35.854898] ffff88800c6d6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.855847] ffff88800c6d6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.856763] ================================================================== [ 35.857740] Disabling lock debugging due to kernel taint [ 37.905498] BUG: Bad rss-counter state mm:00000000564d563f type:MM_FILEPAGES val:33 [ 37.906454] BUG: Bad rss-counter state mm:00000000564d563f type:MM_ANONPAGES val:22 [ 38.434045] BUG: Bad rss-counter state mm:0000000066cba5dc type:MM_FILEPAGES val:33 [ 38.435152] BUG: Bad rss-counter state mm:0000000066cba5dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21060' (ECDSA) to the list of known hosts. 2023/06/20 07:15:09 fuzzer started 2023/06/20 07:15:09 dialing manager at localhost:44161 2023/06/20 07:15:09 checking machine... 2023/06/20 07:15:09 checking revisions... [ 39.230219] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:15:09 testing simple program... [ 39.274275] cgroup: Unknown subsys name 'net' [ 39.313864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d957750 RCX=0000000000000000 RDX=ffff88800d958000 RSI=ffffffff818a0336 RDI=0000000000000007 RBP=ffff88800d957578 RSP=ffff88800d957478 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=0000000000000001 R12=ffff88800b58a188 R13=0000000000000200 R14=0000000000000000 R15=ffff88800b58a178 RIP=ffffffff814c081b 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 00007f5858464900 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=00007f58578aa3e0 CR3=000000000cbd2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8c845f9129dfb19500000000000ae988 XMM05=f4d41856d5f3d22a00000000001363b0 XMM06=dfcdbad4f1609c370000000000135248 XMM07=fb795ef6d65770560000000000125748 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f7e2d5a5618 CR3=000000000ddd0000 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=2039303a35313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a35313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000