syzkaller login: [ 41.605594] BUG: Bad rss-counter state mm:00000000241d3aee type:MM_FILEPAGES val:33 [ 41.606254] BUG: Bad rss-counter state mm:00000000241d3aee type:MM_ANONPAGES val:22 [ 41.699483] ================================================================== [ 41.700450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.701460] Read of size 8 at addr ffff88801809f4e0 by task sshd/226 [ 41.702275] [ 41.702514] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.703502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.704544] Call Trace: [ 41.704897] [ 41.705205] dump_stack_lvl+0x91/0xf0 [ 41.705733] print_report+0xcc/0x620 [ 41.706251] ? __virt_addr_valid+0x102/0x340 [ 41.706869] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.707534] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.708187] kasan_report+0xbe/0xf0 [ 41.708697] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.709375] vma_interval_tree_remove+0xc75/0xec0 [ 41.710037] vma_prepare+0xc54/0x11a0 [ 41.710564] __split_vma+0x5af/0x950 [ 41.711073] ? __pfx___split_vma+0x10/0x10 [ 41.711654] ? find_held_lock+0x2c/0x110 [ 41.712216] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.712834] ? lock_is_held_type+0x9f/0x120 [ 41.713415] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.714075] ? mtree_range_walk+0x632/0x900 [ 41.714691] ? mas_walk+0x5c7/0x7c0 [ 41.715206] do_vmi_munmap+0x1f1/0x2b0 [ 41.715740] mmap_region+0x1f9/0x2660 [ 41.716259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.716826] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.717602] ? __pfx_lock_acquire+0x10/0x10 [ 41.718179] ? __pfx_mmap_region+0x10/0x10 [ 41.718771] ? security_mmap_addr+0x7d/0xa0 [ 41.719349] ? get_unmapped_area+0x1f5/0x3f0 [ 41.719946] do_mmap+0x854/0xf00 [ 41.720424] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.720962] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.721572] ksys_mmap_pgoff+0x3af/0x500 [ 41.722122] do_syscall_64+0x3f/0x90 [ 41.722646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.723351] RIP: 0033:0x7f22c70bfd82 [ 41.723848] 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 [ 41.726180] RSP: 002b:00007fff8e4eb398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.727190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22c70bfd82 [ 41.728113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22c64f9000 [ 41.729041] RBP: 00007f22c64f9000 R08: 0000000000000009 R09: 0000000000001000 [ 41.729961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c361f53ec0 [ 41.730896] R13: 00007fff8e4eb3b0 R14: 00007fff8e4eb3e0 R15: 00007fff8e4eb740 [ 41.731831] [ 41.732151] [ 41.732386] Allocated by task 219: [ 41.732852] kasan_save_stack+0x22/0x50 [ 41.733407] kasan_set_track+0x25/0x30 [ 41.733950] __kasan_slab_alloc+0x59/0x70 [ 41.734544] kmem_cache_alloc+0x16b/0x370 [ 41.735108] vm_area_dup+0x20/0x160 [ 41.735604] __split_vma+0x170/0x950 [ 41.736115] split_vma+0xc6/0x110 [ 41.736598] mprotect_fixup+0x8d2/0xb30 [ 41.737147] do_mprotect_pkey+0x87e/0xd40 [ 41.737713] __x64_sys_mprotect+0x78/0xc0 [ 41.738283] do_syscall_64+0x3f/0x90 [ 41.738806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.739504] [ 41.739739] Freed by task 13: [ 41.740158] kasan_save_stack+0x22/0x50 [ 41.740710] kasan_set_track+0x25/0x30 [ 41.741249] kasan_save_free_info+0x2b/0x50 [ 41.741856] __kasan_slab_free+0x10a/0x190 [ 41.742446] kmem_cache_free+0x10d/0x4d0 [ 41.743031] rcu_core+0x8c8/0x2860 [ 41.743528] __do_softirq+0x1b7/0x7d4 [ 41.744054] [ 41.744295] Last potentially related work creation: [ 41.744945] kasan_save_stack+0x22/0x50 [ 41.745505] __kasan_record_aux_stack+0x8e/0xa0 [ 41.746144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.746854] remove_vma+0x139/0x170 [ 41.747355] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.747975] do_vmi_munmap+0x1f1/0x2b0 [ 41.748515] __vm_munmap+0x138/0x3a0 [ 41.749033] __x64_sys_munmap+0x59/0x80 [ 41.749585] do_syscall_64+0x3f/0x90 [ 41.750107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.750824] [ 41.751065] The buggy address belongs to the object at ffff88801809f488 [ 41.751065] which belongs to the cache vm_area_struct of size 168 [ 41.752687] The buggy address is located 88 bytes inside of [ 41.752687] freed 168-byte region [ffff88801809f488, ffff88801809f530) [ 41.754240] [ 41.754493] The buggy address belongs to the physical page: [ 41.755236] page:000000004eaa9779 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1809f [ 41.756457] memcg:ffff8880146bdd01 [ 41.756939] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.757668] page_type: 0xffffffff() [ 41.758172] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.759215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146bdd01 [ 41.760253] page dumped because: kasan: bad access detected [ 41.760993] [ 41.761239] Memory state around the buggy address: [ 41.761891] ffff88801809f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.762867] ffff88801809f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 41.763824] >ffff88801809f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.764784] ^ [ 41.765623] ffff88801809f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.766598] ffff88801809f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.767570] ================================================================== [ 41.768744] Disabling lock debugging due to kernel taint [ 43.558945] BUG: Bad rss-counter state mm:00000000b2532a67 type:MM_FILEPAGES val:33 [ 43.560217] BUG: Bad rss-counter state mm:00000000b2532a67 type:MM_ANONPAGES val:22 [ 44.044395] BUG: Bad rss-counter state mm:000000007f0884f8 type:MM_FILEPAGES val:33 [ 44.045608] BUG: Bad rss-counter state mm:000000007f0884f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56486' (ECDSA) to the list of known hosts. 2023/06/19 11:40:11 fuzzer started 2023/06/19 11:40:12 dialing manager at localhost:44161 2023/06/19 11:40:12 checking machine... 2023/06/19 11:40:12 checking revisions... [ 44.783875] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:40:12 testing simple program... [ 44.828903] cgroup: Unknown subsys name 'net' [ 44.881889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880097aaf00 RCX=ffffffff8186429b RDX=ffff888019d1b680 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000000005a RSP=ffff888016bb7d60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f67200341b0 R14=1ffff11002d76fb2 R15=ffff888016bb7ec8 RIP=ffffffff814c07e0 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 00007f672a3ac700 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=00007fd40dcbaa50 CR3=000000000f6cc000 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=2031313a30343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a30343a3131203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f85d0d950b0 CR3=000000001b9f4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000