syzkaller login: [ 36.487811] BUG: Bad rss-counter state mm:000000001469e0f1 type:MM_FILEPAGES val:33 [ 36.489517] BUG: Bad rss-counter state mm:000000001469e0f1 type:MM_ANONPAGES val:22 [ 36.652884] ================================================================== [ 36.653793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.654739] Read of size 8 at addr ffff88801a13a058 by task sshd/220 [ 36.655507] [ 36.655724] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.656727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.657698] Call Trace: [ 36.658016] [ 36.658345] dump_stack_lvl+0x91/0xf0 [ 36.658836] print_report+0xcc/0x620 [ 36.659323] ? __virt_addr_valid+0x102/0x340 [ 36.659873] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.660491] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.661116] kasan_report+0xbe/0xf0 [ 36.661597] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.662233] vma_interval_tree_remove+0xc75/0xec0 [ 36.662839] vma_prepare+0xc54/0x11a0 [ 36.663324] __split_vma+0x5af/0x950 [ 36.663803] ? __pfx___split_vma+0x10/0x10 [ 36.664338] ? find_held_lock+0x2c/0x110 [ 36.664859] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.665420] ? lock_is_held_type+0x9f/0x120 [ 36.665955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.666569] ? mtree_range_walk+0x632/0x900 [ 36.667127] ? mas_walk+0x5c7/0x7c0 [ 36.667600] do_vmi_munmap+0x1f1/0x2b0 [ 36.668090] mmap_region+0x1f9/0x2660 [ 36.668572] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.669084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.669802] ? __pfx_lock_acquire+0x10/0x10 [ 36.670349] ? __pfx_mmap_region+0x10/0x10 [ 36.670879] ? security_mmap_addr+0x7d/0xa0 [ 36.671425] ? get_unmapped_area+0x1f5/0x3f0 [ 36.671975] do_mmap+0x854/0xf00 [ 36.672416] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.672932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.673497] ksys_mmap_pgoff+0x3af/0x500 [ 36.674014] do_syscall_64+0x3f/0x90 [ 36.674502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.675153] RIP: 0033:0x7f54756ddd82 [ 36.675616] 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 [ 36.677826] RSP: 002b:00007ffe89004aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.678747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54756ddd82 [ 36.679607] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5474b17000 [ 36.680487] RBP: 00007f5474b17000 R08: 0000000000000009 R09: 0000000000001000 [ 36.681363] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591e69d0d90 [ 36.682251] R13: 00007ffe89004ac0 R14: 00007ffe89004af0 R15: 00007ffe89004e50 [ 36.683105] [ 36.683399] [ 36.683611] Allocated by task 213: [ 36.684040] kasan_save_stack+0x22/0x50 [ 36.684540] kasan_set_track+0x25/0x30 [ 36.685033] __kasan_slab_alloc+0x59/0x70 [ 36.685557] kmem_cache_alloc+0x16b/0x370 [ 36.686084] vm_area_dup+0x20/0x160 [ 36.686537] __split_vma+0x170/0x950 [ 36.687005] split_vma+0xc6/0x110 [ 36.687445] mprotect_fixup+0x8d2/0xb30 [ 36.687948] do_mprotect_pkey+0x87e/0xd40 [ 36.688474] __x64_sys_mprotect+0x78/0xc0 [ 36.688997] do_syscall_64+0x3f/0x90 [ 36.689465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.690133] [ 36.690352] Freed by task 19: [ 36.690740] kasan_save_stack+0x22/0x50 [ 36.691237] kasan_set_track+0x25/0x30 [ 36.691731] kasan_save_free_info+0x2b/0x50 [ 36.692266] __kasan_slab_free+0x10a/0x190 [ 36.692804] kmem_cache_free+0x10d/0x4d0 [ 36.693313] rcu_core+0x8c8/0x2860 [ 36.693754] __do_softirq+0x1b7/0x7d4 [ 36.694244] [ 36.694457] Last potentially related work creation: [ 36.695042] kasan_save_stack+0x22/0x50 [ 36.695541] __kasan_record_aux_stack+0x8e/0xa0 [ 36.696119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.696756] remove_vma+0x139/0x170 [ 36.697205] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.697762] do_vmi_munmap+0x1f1/0x2b0 [ 36.698255] __vm_munmap+0x138/0x3a0 [ 36.698719] __x64_sys_munmap+0x59/0x80 [ 36.699216] do_syscall_64+0x3f/0x90 [ 36.699719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.700366] [ 36.700588] The buggy address belongs to the object at ffff88801a13a000 [ 36.700588] which belongs to the cache vm_area_struct of size 168 [ 36.702140] The buggy address is located 88 bytes inside of [ 36.702140] freed 168-byte region [ffff88801a13a000, ffff88801a13a0a8) [ 36.703532] [ 36.703749] The buggy address belongs to the physical page: [ 36.704414] page:0000000044718b3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a13a [ 36.705503] memcg:ffff8880167f9a01 [ 36.705930] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.706581] page_type: 0xffffffff() [ 36.707035] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.707953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167f9a01 [ 36.708854] page dumped because: kasan: bad access detected [ 36.709512] [ 36.709729] Memory state around the buggy address: [ 36.710319] ffff88801a139f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.711173] ffff88801a139f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.712025] >ffff88801a13a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.712874] ^ [ 36.713595] ffff88801a13a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.714471] ffff88801a13a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.715317] ================================================================== [ 36.716288] Disabling lock debugging due to kernel taint [ 38.472773] BUG: Bad rss-counter state mm:0000000039d55dbd type:MM_FILEPAGES val:33 [ 38.474433] BUG: Bad rss-counter state mm:0000000039d55dbd type:MM_ANONPAGES val:22 [ 39.042591] BUG: Bad rss-counter state mm:00000000e8d980c3 type:MM_FILEPAGES val:33 [ 39.043841] BUG: Bad rss-counter state mm:00000000e8d980c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57971' (ECDSA) to the list of known hosts. 2023/06/20 06:59:09 fuzzer started 2023/06/20 06:59:10 dialing manager at localhost:44161 2023/06/20 06:59:10 checking machine... 2023/06/20 06:59:10 checking revisions... [ 39.703176] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:59:10 testing simple program... [ 39.761217] cgroup: Unknown subsys name 'net' [ 39.818523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:02 Registers: info registers vcpu 0 RAX=0000000000000040 RBX=0000000000000040 RCX=0000000000000000 RDX=ffff88800fb0b680 RSI=0000000000000040 RDI=0000000000000000 RBP=00005649b6d6ae20 RSP=ffff88801434fd60 R8 =0000000000000007 R9 =0000000000000000 R10=8080808080808080 R11=0000000000000000 R12=ffff8880158ba200 R13=0000000000000000 R14=0000000000000040 R15=ffffffff85d3ce80 RIP=ffffffff814c0384 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 00007f01ea49d900 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=00007f8908d2b650 CR3=000000000f1c0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3abce82387bceb0000000000000ae988 XMM05=05d459f06f402a5e0000000000135250 XMM06=4fda316b135da52b0000000000134040 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffc632c9a88 CR3=000000000ca5c000 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=2039303a39353a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a39353a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000