syzkaller login: [ 32.234361] BUG: Bad rss-counter state mm:000000003964e694 type:MM_FILEPAGES val:33 [ 32.235398] BUG: Bad rss-counter state mm:000000003964e694 type:MM_ANONPAGES val:22 [ 32.402757] ================================================================== [ 32.403890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.405106] Read of size 8 at addr ffff888019dfca50 by task sshd/219 [ 32.406020] [ 32.406243] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.407131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.408168] Call Trace: [ 32.408503] [ 32.408796] dump_stack_lvl+0x91/0xf0 [ 32.409316] print_report+0xcc/0x620 [ 32.409820] ? __virt_addr_valid+0x102/0x340 [ 32.410390] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.411033] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.411674] kasan_report+0xbe/0xf0 [ 32.412164] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.412802] vma_interval_tree_remove+0xc75/0xec0 [ 32.413446] vma_prepare+0xc54/0x11a0 [ 32.413942] __split_vma+0x5af/0x950 [ 32.414434] ? __pfx___split_vma+0x10/0x10 [ 32.414973] ? find_held_lock+0x2c/0x110 [ 32.415523] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.416104] ? lock_is_held_type+0x9f/0x120 [ 32.416667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.417306] ? mtree_range_walk+0x632/0x900 [ 32.417882] ? mas_walk+0x5c7/0x7c0 [ 32.418380] do_vmi_munmap+0x1f1/0x2b0 [ 32.418895] mmap_region+0x1f9/0x2660 [ 32.419393] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.419936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.420679] ? __pfx_lock_acquire+0x10/0x10 [ 32.421244] ? __pfx_mmap_region+0x10/0x10 [ 32.421794] ? security_mmap_addr+0x7d/0xa0 [ 32.422329] ? get_unmapped_area+0x1f5/0x3f0 [ 32.422881] do_mmap+0x854/0xf00 [ 32.423330] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.423828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.424403] ksys_mmap_pgoff+0x3af/0x500 [ 32.424913] do_syscall_64+0x3f/0x90 [ 32.425410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.426056] RIP: 0033:0x7fb15bf63d82 [ 32.426517] 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 [ 32.428655] RSP: 002b:00007ffd5f13f9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.429584] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb15bf63d82 [ 32.430425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb15b39d000 [ 32.431287] RBP: 00007fb15b39d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.432127] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c135b4f70 [ 32.432969] R13: 00007ffd5f13fa10 R14: 00007ffd5f13fa40 R15: 00007ffd5f13fda0 [ 32.433843] [ 32.434138] [ 32.434356] Allocated by task 212: [ 32.434782] kasan_save_stack+0x22/0x50 [ 32.435283] kasan_set_track+0x25/0x30 [ 32.435774] __kasan_slab_alloc+0x59/0x70 [ 32.436298] kmem_cache_alloc+0x16b/0x370 [ 32.436816] vm_area_dup+0x20/0x160 [ 32.437276] __split_vma+0x170/0x950 [ 32.437741] split_vma+0xc6/0x110 [ 32.438179] mprotect_fixup+0x8d2/0xb30 [ 32.438680] do_mprotect_pkey+0x87e/0xd40 [ 32.439205] __x64_sys_mprotect+0x78/0xc0 [ 32.439729] do_syscall_64+0x3f/0x90 [ 32.440199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.440836] [ 32.441050] Freed by task 202: [ 32.441464] kasan_save_stack+0x22/0x50 [ 32.441969] kasan_set_track+0x25/0x30 [ 32.442460] kasan_save_free_info+0x2b/0x50 [ 32.442996] __kasan_slab_free+0x10a/0x190 [ 32.443535] kmem_cache_free+0x10d/0x4d0 [ 32.444042] rcu_core+0x8c8/0x2860 [ 32.444499] __do_softirq+0x1b7/0x7d4 [ 32.444976] [ 32.445196] Last potentially related work creation: [ 32.445778] kasan_save_stack+0x22/0x50 [ 32.446278] __kasan_record_aux_stack+0x8e/0xa0 [ 32.446857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.447504] remove_vma+0x139/0x170 [ 32.447959] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.448518] do_vmi_munmap+0x1f1/0x2b0 [ 32.449005] __vm_munmap+0x138/0x3a0 [ 32.449484] __x64_sys_munmap+0x59/0x80 [ 32.449978] do_syscall_64+0x3f/0x90 [ 32.450454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.451097] [ 32.451310] The buggy address belongs to the object at ffff888019dfc9f8 [ 32.451310] which belongs to the cache vm_area_struct of size 168 [ 32.452775] The buggy address is located 88 bytes inside of [ 32.452775] freed 168-byte region [ffff888019dfc9f8, ffff888019dfcaa0) [ 32.454198] [ 32.454417] The buggy address belongs to the physical page: [ 32.455072] page:00000000fa4e7036 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dfc [ 32.456169] memcg:ffff888016271b01 [ 32.456593] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.457323] page_type: 0xffffffff() [ 32.457771] raw: 0100000000000200 ffff88800879fc80 ffffea00003ee200 dead000000000007 [ 32.458706] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016271b01 [ 32.459629] page dumped because: kasan: bad access detected [ 32.460289] [ 32.460503] Memory state around the buggy address: [ 32.461095] ffff888019dfc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.461963] ffff888019dfc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.462863] >ffff888019dfca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.463747] ^ [ 32.464472] ffff888019dfca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.465382] ffff888019dfcb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.466270] ================================================================== [ 32.467348] Disabling lock debugging due to kernel taint [ 34.398055] BUG: Bad rss-counter state mm:000000009ef06667 type:MM_FILEPAGES val:33 [ 34.399381] BUG: Bad rss-counter state mm:000000009ef06667 type:MM_ANONPAGES val:22 [ 34.792718] BUG: Bad rss-counter state mm:000000004815cad1 type:MM_FILEPAGES val:33 [ 34.794005] BUG: Bad rss-counter state mm:000000004815cad1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43245' (ECDSA) to the list of known hosts. 2023/06/19 14:44:47 fuzzer started 2023/06/19 14:44:48 dialing manager at localhost:44161 2023/06/19 14:44:48 checking machine... 2023/06/19 14:44:48 checking revisions... [ 35.520612] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:44:48 testing simple program... [ 35.564401] cgroup: Unknown subsys name 'net' [ 35.615067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:44:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a3b9640 RCX=00000000fffffeb8 RDX=0000000000000006 RSI=ffff88807ffdc000 RDI=ffff888008e87100 RBP=ffff888008e87100 RSP=ffff8880147278e0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000fffffeb8 R15=ffff888008e87100 RIP=ffffffff8183976f RFL=00000286 [--S--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 00007f6f40be3900 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=00007fdfcd8f1650 CR3=0000000013a72000 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=5b7d196d3b43d291b446d83bd33fabe6 XMM02=ec2efd57dc4c00df000000000011d958 XMM03=f57a5e4a4af8737c000000000011da28 XMM04=fa6c35e27cd9342300000000000ae988 XMM05=372871790c45f82b0000000000135378 XMM06=806171799158d9670000000000134168 XMM07=fb795ef6d657705600000000001246d0 XMM08=2c67c8bc2e329bc3000000000011d9c8 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=00007fff7014da08 CR3=0000000019d94000 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=2037343a34343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000