syzkaller login: [ 31.386601] BUG: Bad rss-counter state mm:00000000263443b2 type:MM_FILEPAGES val:33 [ 31.388042] BUG: Bad rss-counter state mm:00000000263443b2 type:MM_ANONPAGES val:22 [ 31.554432] ================================================================== [ 31.555348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.556288] Read of size 8 at addr ffff8880166cf4e0 by task sshd/219 [ 31.557058] [ 31.557280] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.558222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.559191] Call Trace: [ 31.559546] <TASK> [ 31.559834] dump_stack_lvl+0x91/0xf0 [ 31.560328] print_report+0xcc/0x620 [ 31.560816] ? __virt_addr_valid+0x102/0x340 [ 31.561397] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562758] kasan_report+0xbe/0xf0 [ 31.563254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.563917] vma_interval_tree_remove+0xc75/0xec0 [ 31.564542] vma_prepare+0xc54/0x11a0 [ 31.565037] __split_vma+0x5af/0x950 [ 31.565529] ? __pfx___split_vma+0x10/0x10 [ 31.566084] ? find_held_lock+0x2c/0x110 [ 31.566623] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.567207] ? lock_is_held_type+0x9f/0x120 [ 31.567819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.568452] ? mtree_range_walk+0x632/0x900 [ 31.569023] ? mas_walk+0x5c7/0x7c0 [ 31.569521] do_vmi_munmap+0x1f1/0x2b0 [ 31.570033] mmap_region+0x1f9/0x2660 [ 31.570533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.571063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.571810] ? __pfx_lock_acquire+0x10/0x10 [ 31.572363] ? __pfx_mmap_region+0x10/0x10 [ 31.572916] ? security_mmap_addr+0x7d/0xa0 [ 31.573469] ? get_unmapped_area+0x1f5/0x3f0 [ 31.574040] do_mmap+0x854/0xf00 [ 31.574502] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.575019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.575617] ksys_mmap_pgoff+0x3af/0x500 [ 31.576141] do_syscall_64+0x3f/0x90 [ 31.576647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.577318] RIP: 0033:0x7fc40ef1dd82 [ 31.577799] 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 [ 31.580197] RSP: 002b:00007fffa96267d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.581171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc40ef1dd82 [ 31.582076] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc40e357000 [ 31.583092] RBP: 00007fc40e357000 R08: 0000000000000009 R09: 0000000000001000 [ 31.583989] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dee7633ec0 [ 31.584875] R13: 00007fffa96267f0 R14: 00007fffa9626820 R15: 00007fffa9626b80 [ 31.585762] </TASK> [ 31.586065] [ 31.586290] Allocated by task 212: [ 31.586733] kasan_save_stack+0x22/0x50 [ 31.587257] kasan_set_track+0x25/0x30 [ 31.587793] __kasan_slab_alloc+0x59/0x70 [ 31.588341] kmem_cache_alloc+0x16b/0x370 [ 31.588876] vm_area_dup+0x20/0x160 [ 31.589348] __split_vma+0x170/0x950 [ 31.589837] split_vma+0xc6/0x110 [ 31.590297] mprotect_fixup+0x8d2/0xb30 [ 31.590816] do_mprotect_pkey+0x87e/0xd40 [ 31.591370] __x64_sys_mprotect+0x78/0xc0 [ 31.591908] do_syscall_64+0x3f/0x90 [ 31.592403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593080] [ 31.593307] Freed by task 19: [ 31.593709] kasan_save_stack+0x22/0x50 [ 31.594233] kasan_set_track+0x25/0x30 [ 31.594749] kasan_save_free_info+0x2b/0x50 [ 31.595304] __kasan_slab_free+0x10a/0x190 [ 31.595867] kmem_cache_free+0x10d/0x4d0 [ 31.596391] rcu_core+0x8c8/0x2860 [ 31.596852] __do_softirq+0x1b7/0x7d4 [ 31.597345] [ 31.597569] Last potentially related work creation: [ 31.598186] kasan_save_stack+0x22/0x50 [ 31.598714] __kasan_record_aux_stack+0x8e/0xa0 [ 31.599328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.600006] remove_vma+0x139/0x170 [ 31.600479] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.601056] do_vmi_munmap+0x1f1/0x2b0 [ 31.601566] __vm_munmap+0x138/0x3a0 [ 31.602052] __x64_sys_munmap+0x59/0x80 [ 31.602571] do_syscall_64+0x3f/0x90 [ 31.603069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603745] [ 31.603967] The buggy address belongs to the object at ffff8880166cf488 [ 31.603967] which belongs to the cache vm_area_struct of size 168 [ 31.605491] The buggy address is located 88 bytes inside of [ 31.605491] freed 168-byte region [ffff8880166cf488, ffff8880166cf530) [ 31.606941] [ 31.607164] The buggy address belongs to the physical page: [ 31.607869] page:00000000bca5795c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166cf [ 31.609007] memcg:ffff8880197ea401 [ 31.609451] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.610119] page_type: 0xffffffff() [ 31.610592] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.611550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197ea401 [ 31.612495] page dumped because: kasan: bad access detected [ 31.613180] [ 31.613406] Memory state around the buggy address: [ 31.614015] ffff8880166cf380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.614910] ffff8880166cf400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.615804] >ffff8880166cf480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.616685] ^ [ 31.617464] ffff8880166cf500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.618355] ffff8880166cf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.619245] ================================================================== [ 31.620397] Disabling lock debugging due to kernel taint [ 33.598809] BUG: Bad rss-counter state mm:00000000056002df type:MM_FILEPAGES val:33 [ 33.600118] BUG: Bad rss-counter state mm:00000000056002df type:MM_ANONPAGES val:22 [ 34.128491] BUG: Bad rss-counter state mm:00000000137ce7b4 type:MM_FILEPAGES val:33 [ 34.129510] BUG: Bad rss-counter state mm:00000000137ce7b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36675' (ECDSA) to the list of known hosts. 2023/06/21 08:48:03 fuzzer started 2023/06/21 08:48:04 dialing manager at localhost:36067 2023/06/21 08:48:04 checking machine... 2023/06/21 08:48:04 checking revisions... [ 34.929820] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:48:04 testing simple program... [ 34.984230] cgroup: Unknown subsys name 'net' [ 35.022437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:48:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8199bef0 RDX=ffff88800c58b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f02b070 RSP=ffff88800db9f938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888009a1e800 R13=0000000000000001 R14=0000000000000000 R15=ffff888009a1e940 RIP=ffffffff814c0864 RFL=00000046 [---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 00007f95acade900 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=00007f95ad093650 CR3=000000000ebf2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000607f92e0b7e8 RBX=ffff888019102468 RCX=0000000000000000 RDX=ffffffff81803bb0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888008e68180 RSP=ffff88806cf09e20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880087b8500 R13=ffffea0000644080 R14=ffffffff813782f8 R15=ffff888008e68180 RIP=ffffffff81803bf3 RFL=00000202 [-------] 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 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=00007efeb0e372e0 CR3=000000000fe4e000 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=2033303a38343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a38343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000