syzkaller login: [ 30.637487] BUG: Bad rss-counter state mm:00000000938fda75 type:MM_FILEPAGES val:33 [ 30.639442] BUG: Bad rss-counter state mm:00000000938fda75 type:MM_ANONPAGES val:22 [ 30.800469] ================================================================== [ 30.801373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.802298] Read of size 8 at addr ffff88801640f5c8 by task sshd/221 [ 30.803176] [ 30.803407] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.804281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.805327] Call Trace: [ 30.805641] [ 30.805923] dump_stack_lvl+0x91/0xf0 [ 30.806416] print_report+0xcc/0x620 [ 30.806901] ? __virt_addr_valid+0x102/0x340 [ 30.807462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808697] kasan_report+0xbe/0xf0 [ 30.809176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809794] vma_interval_tree_remove+0xc75/0xec0 [ 30.810393] vma_prepare+0xc54/0x11a0 [ 30.810863] __split_vma+0x5af/0x950 [ 30.811343] ? __pfx___split_vma+0x10/0x10 [ 30.811869] ? find_held_lock+0x2c/0x110 [ 30.812399] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.812960] ? lock_is_held_type+0x9f/0x120 [ 30.813496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.814098] ? mtree_range_walk+0x632/0x900 [ 30.814652] ? mas_walk+0x5c7/0x7c0 [ 30.815127] do_vmi_munmap+0x1f1/0x2b0 [ 30.815641] mmap_region+0x1f9/0x2660 [ 30.816127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.816637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.817345] ? __pfx_lock_acquire+0x10/0x10 [ 30.817872] ? __pfx_mmap_region+0x10/0x10 [ 30.818404] ? security_mmap_addr+0x7d/0xa0 [ 30.818926] ? get_unmapped_area+0x1f5/0x3f0 [ 30.819479] do_mmap+0x854/0xf00 [ 30.819916] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.820405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.820962] ksys_mmap_pgoff+0x3af/0x500 [ 30.821472] do_syscall_64+0x3f/0x90 [ 30.821944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822586] RIP: 0033:0x7f5b15d22d82 [ 30.823035] 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 [ 30.825153] RSP: 002b:00007ffc87c8d2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.826051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b15d22d82 [ 30.826891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b1515c000 [ 30.827746] RBP: 00007f5b1515c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.828586] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dcf2307b20 [ 30.829418] R13: 00007ffc87c8d2d0 R14: 00007ffc87c8d300 R15: 00007ffc87c8d660 [ 30.830288] [ 30.830573] [ 30.830786] Allocated by task 214: [ 30.831215] kasan_save_stack+0x22/0x50 [ 30.831742] kasan_set_track+0x25/0x30 [ 30.832239] __kasan_slab_alloc+0x59/0x70 [ 30.832759] kmem_cache_alloc+0x16b/0x370 [ 30.833283] vm_area_dup+0x20/0x160 [ 30.833746] __split_vma+0x170/0x950 [ 30.834208] split_vma+0xc6/0x110 [ 30.834643] mprotect_fixup+0x8d2/0xb30 [ 30.835139] do_mprotect_pkey+0x87e/0xd40 [ 30.835660] __x64_sys_mprotect+0x78/0xc0 [ 30.836181] do_syscall_64+0x3f/0x90 [ 30.836657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.837303] [ 30.837517] Freed by task 214: [ 30.837907] kasan_save_stack+0x22/0x50 [ 30.838411] kasan_set_track+0x25/0x30 [ 30.838909] kasan_save_free_info+0x2b/0x50 [ 30.839454] __kasan_slab_free+0x10a/0x190 [ 30.839981] kmem_cache_free+0x10d/0x4d0 [ 30.840486] rcu_core+0x8c8/0x2860 [ 30.840932] __do_softirq+0x1b7/0x7d4 [ 30.841413] [ 30.841626] Last potentially related work creation: [ 30.842209] kasan_save_stack+0x22/0x50 [ 30.842706] __kasan_record_aux_stack+0x8e/0xa0 [ 30.843272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.843913] remove_vma+0x139/0x170 [ 30.844369] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.844914] do_vmi_munmap+0x1f1/0x2b0 [ 30.845395] __vm_munmap+0x138/0x3a0 [ 30.845856] __x64_sys_munmap+0x59/0x80 [ 30.846347] do_syscall_64+0x3f/0x90 [ 30.846812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847464] [ 30.847684] The buggy address belongs to the object at ffff88801640f570 [ 30.847684] which belongs to the cache vm_area_struct of size 168 [ 30.849148] The buggy address is located 88 bytes inside of [ 30.849148] freed 168-byte region [ffff88801640f570, ffff88801640f618) [ 30.850548] [ 30.850762] The buggy address belongs to the physical page: [ 30.851423] page:00000000bf8a62d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1640f [ 30.852514] memcg:ffff888016015c01 [ 30.852940] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.853583] page_type: 0xffffffff() [ 30.854029] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.854935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016015c01 [ 30.855850] page dumped because: kasan: bad access detected [ 30.856505] [ 30.856717] Memory state around the buggy address: [ 30.857295] ffff88801640f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.858134] ffff88801640f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.858986] >ffff88801640f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.859834] ^ [ 30.860505] ffff88801640f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.861358] ffff88801640f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.862201] ================================================================== [ 30.863168] Disabling lock debugging due to kernel taint [ 32.919006] BUG: Bad rss-counter state mm:00000000688d25a1 type:MM_FILEPAGES val:33 [ 32.920645] BUG: Bad rss-counter state mm:00000000688d25a1 type:MM_ANONPAGES val:22 [ 33.448573] BUG: Bad rss-counter state mm:000000009e48ac2f type:MM_FILEPAGES val:33 [ 33.449911] BUG: Bad rss-counter state mm:000000009e48ac2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59940' (ECDSA) to the list of known hosts. 2023/06/20 20:53:18 fuzzer started 2023/06/20 20:53:18 dialing manager at localhost:36067 2023/06/20 20:53:18 checking machine... 2023/06/20 20:53:18 checking revisions... [ 34.079135] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:53:19 testing simple program... [ 34.131727] cgroup: Unknown subsys name 'net' [ 34.196164] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:18 Registers: info registers vcpu 0 RAX=ffff888016f50001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016f4ff01 RSI=ffff888016f4ff48 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff888016f48000 R14=ffff888016f4ff48 R15=ffff88806ce09a98 RIP=ffffffff811304d1 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 00007f6f066ae900 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=00007ffe485e0000 CR3=000000000edda000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 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=00007f2ae88727e0 CR3=000000001a082000 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=2038313a33353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a33353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000