syzkaller login: [ 30.546721] BUG: Bad rss-counter state mm:00000000f301c4cd type:MM_FILEPAGES val:33 [ 30.548376] BUG: Bad rss-counter state mm:00000000f301c4cd type:MM_ANONPAGES val:22 [ 30.713032] ================================================================== [ 30.713967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.714900] Read of size 8 at addr ffff88801589a5c8 by task sshd/219 [ 30.715778] [ 30.715999] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.716864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.717846] Call Trace: [ 30.718164] [ 30.718448] dump_stack_lvl+0x91/0xf0 [ 30.718953] print_report+0xcc/0x620 [ 30.719438] ? __virt_addr_valid+0x102/0x340 [ 30.719993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.720608] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.721237] kasan_report+0xbe/0xf0 [ 30.721717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722332] vma_interval_tree_remove+0xc75/0xec0 [ 30.722935] vma_prepare+0xc54/0x11a0 [ 30.723412] __split_vma+0x5af/0x950 [ 30.723882] ? __pfx___split_vma+0x10/0x10 [ 30.724435] ? find_held_lock+0x2c/0x110 [ 30.724960] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.725520] ? lock_is_held_type+0x9f/0x120 [ 30.726066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.726669] ? mtree_range_walk+0x632/0x900 [ 30.727224] ? mas_walk+0x5c7/0x7c0 [ 30.727699] do_vmi_munmap+0x1f1/0x2b0 [ 30.728208] mmap_region+0x1f9/0x2660 [ 30.728695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.729208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.729919] ? __pfx_lock_acquire+0x10/0x10 [ 30.730453] ? __pfx_mmap_region+0x10/0x10 [ 30.730987] ? security_mmap_addr+0x7d/0xa0 [ 30.731509] ? get_unmapped_area+0x1f5/0x3f0 [ 30.732060] do_mmap+0x854/0xf00 [ 30.732526] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.733023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.733581] ksys_mmap_pgoff+0x3af/0x500 [ 30.734093] do_syscall_64+0x3f/0x90 [ 30.734571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735214] RIP: 0033:0x7f59eac36d82 [ 30.735670] 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 [ 30.737821] RSP: 002b:00007ffc18b92508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.738722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59eac36d82 [ 30.739562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59ea070000 [ 30.740427] RBP: 00007f59ea070000 R08: 0000000000000009 R09: 0000000000001000 [ 30.741283] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb81d79ec0 [ 30.742134] R13: 00007ffc18b92520 R14: 00007ffc18b92550 R15: 00007ffc18b928b0 [ 30.742989] [ 30.743282] [ 30.743499] Allocated by task 212: [ 30.743938] kasan_save_stack+0x22/0x50 [ 30.744457] kasan_set_track+0x25/0x30 [ 30.744959] __kasan_slab_alloc+0x59/0x70 [ 30.745484] kmem_cache_alloc+0x16b/0x370 [ 30.746010] vm_area_dup+0x20/0x160 [ 30.746475] __split_vma+0x170/0x950 [ 30.746952] split_vma+0xc6/0x110 [ 30.747399] mprotect_fixup+0x8d2/0xb30 [ 30.747900] do_mprotect_pkey+0x87e/0xd40 [ 30.748430] __x64_sys_mprotect+0x78/0xc0 [ 30.748961] do_syscall_64+0x3f/0x90 [ 30.749445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750093] [ 30.750310] Freed by task 19: [ 30.750692] kasan_save_stack+0x22/0x50 [ 30.751193] kasan_set_track+0x25/0x30 [ 30.751697] kasan_save_free_info+0x2b/0x50 [ 30.752249] __kasan_slab_free+0x10a/0x190 [ 30.752784] kmem_cache_free+0x10d/0x4d0 [ 30.753290] rcu_core+0x8c8/0x2860 [ 30.753742] __do_softirq+0x1b7/0x7d4 [ 30.754221] [ 30.754439] Last potentially related work creation: [ 30.755029] kasan_save_stack+0x22/0x50 [ 30.755529] __kasan_record_aux_stack+0x8e/0xa0 [ 30.756107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.756751] remove_vma+0x139/0x170 [ 30.757199] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.757759] do_vmi_munmap+0x1f1/0x2b0 [ 30.758249] __vm_munmap+0x138/0x3a0 [ 30.758721] __x64_sys_munmap+0x59/0x80 [ 30.759216] do_syscall_64+0x3f/0x90 [ 30.759691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760350] [ 30.760567] The buggy address belongs to the object at ffff88801589a570 [ 30.760567] which belongs to the cache vm_area_struct of size 168 [ 30.762034] The buggy address is located 88 bytes inside of [ 30.762034] freed 168-byte region [ffff88801589a570, ffff88801589a618) [ 30.763432] [ 30.763654] The buggy address belongs to the physical page: [ 30.764323] page:00000000b543c676 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1589a [ 30.765428] memcg:ffff8880192ef401 [ 30.765868] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.766507] page_type: 0xffffffff() [ 30.766959] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.767893] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880192ef401 [ 30.768816] page dumped because: kasan: bad access detected [ 30.769475] [ 30.769693] Memory state around the buggy address: [ 30.770275] ffff88801589a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.771138] ffff88801589a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.771998] >ffff88801589a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772859] ^ [ 30.773528] ffff88801589a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.774392] ffff88801589a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.775248] ================================================================== [ 30.776321] Disabling lock debugging due to kernel taint [ 32.600941] BUG: Bad rss-counter state mm:00000000138978fb type:MM_FILEPAGES val:33 [ 32.602102] BUG: Bad rss-counter state mm:00000000138978fb type:MM_ANONPAGES val:22 [ 32.896209] BUG: Bad rss-counter state mm:00000000cb257bfb type:MM_FILEPAGES val:33 [ 32.896949] BUG: Bad rss-counter state mm:00000000cb257bfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11000' (ECDSA) to the list of known hosts. 2023/06/20 12:57:13 fuzzer started 2023/06/20 12:57:13 dialing manager at localhost:36067 2023/06/20 12:57:13 checking machine... 2023/06/20 12:57:13 checking revisions... [ 33.495042] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:57:13 testing simple program... [ 33.531391] cgroup: Unknown subsys name 'net' [ 33.608337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:57:13 Registers: info registers vcpu 0 RAX=ffffffff8614e68f RBX=0000000000000001 RCX=ffffffff8614e68a RDX=0000000000000000 RSI=1ffffffff0c29cd1 RDI=ffffffff85e0c568 RBP=ffff8880158773a8 RSP=ffff8880158772e0 R8 =ffffffff8614e67e R9 =ffff888015877390 R10=0000000000038001 R11=00000000000246e9 R12=ffff8880158773b0 R13=ffff888015877398 R14=ffff888015877391 R15=ffff888015877350 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe373fc3900 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=00007fe373440e80 CR3=00000000141d6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8ece0568adcea91b00000000000ae988 XMM05=304962a5f1f128b000000000001346b8 XMM06=806171799158d96700000000001334a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fb6b6bd9261 RBX=00007fb6b6bd9260 RCX=0000000000000001 RDX=000000007ffffff9 RSI=00007fb6b6bd9260 RDI=00007ffca56d6527 RBP=00007ffca56d62a0 RSP=00007ffca56d5d50 R8 =0000000000000000 R9 =0000000000000006 R10=00007ffca56d6267 R11=0000000000000000 R12=00007ffca56d62b0 R13=00007fb6b6bd9258 R14=00007ffca56d63f0 R15=00007fb6b6c08560 RIP=00007fb6b6ab2409 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb6b6654900 00000000 00000000 GS =0000 0000000000000000 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=00007ffca56d3000 CR3=00000000180e8000 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=00000000000000ffffffffffff00ff00 XMM02=0000000000000000ffffffffff000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000