[ 23.764169] BUG: Bad rss-counter state mm:000000008338040a type:MM_FILEPAGES val:33 [ 23.765196] BUG: Bad rss-counter state mm:000000008338040a type:MM_ANONPAGES val:22 [ 23.922187] ================================================================== [ 23.923097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.924041] Read of size 8 at addr ffff888009403310 by task sshd/221 [ 23.924818] [ 23.925041] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.926049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.927028] Call Trace: [ 23.927352] [ 23.927642] dump_stack_lvl+0x91/0xf0 [ 23.928153] print_report+0xcc/0x620 [ 23.928653] ? __virt_addr_valid+0x102/0x340 [ 23.929251] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.929882] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.930518] kasan_report+0xbe/0xf0 [ 23.930998] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.931630] vma_interval_tree_remove+0xc75/0xec0 [ 23.932235] vma_prepare+0xc54/0x11a0 [ 23.932726] __split_vma+0x5af/0x950 [ 23.933197] ? __pfx___split_vma+0x10/0x10 [ 23.933732] ? find_held_lock+0x2c/0x110 [ 23.934254] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.934818] ? lock_is_held_type+0x9f/0x120 [ 23.935362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.935973] ? mtree_range_walk+0x632/0x900 [ 23.936528] ? mas_walk+0x5c7/0x7c0 [ 23.937027] do_vmi_munmap+0x1f1/0x2b0 [ 23.937519] mmap_region+0x1f9/0x2660 [ 23.938003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.938517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.939238] ? __pfx_lock_acquire+0x10/0x10 [ 23.939778] ? __pfx_mmap_region+0x10/0x10 [ 23.940307] ? security_mmap_addr+0x7d/0xa0 [ 23.940847] ? get_unmapped_area+0x1f5/0x3f0 [ 23.941408] do_mmap+0x854/0xf00 [ 23.941848] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.942341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.942900] ksys_mmap_pgoff+0x3af/0x500 [ 23.943409] do_syscall_64+0x3f/0x90 [ 23.943900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.944587] RIP: 0033:0x7ff699a69d82 [ 23.945080] 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 [ 23.947231] RSP: 002b:00007ffdf5e34e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.948148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff699a69d82 [ 23.949017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff698ea3000 [ 23.949861] RBP: 00007ff698ea3000 R08: 0000000000000009 R09: 0000000000001000 [ 23.950710] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f90912f980 [ 23.951554] R13: 00007ffdf5e34e50 R14: 00007ffdf5e34e80 R15: 00007ffdf5e351e0 [ 23.952403] [ 23.952722] [ 23.952951] Allocated by task 214: [ 23.953385] kasan_save_stack+0x22/0x50 [ 23.953894] kasan_set_track+0x25/0x30 [ 23.954387] __kasan_slab_alloc+0x59/0x70 [ 23.954915] kmem_cache_alloc+0x16b/0x370 [ 23.955439] vm_area_dup+0x20/0x160 [ 23.955911] __split_vma+0x170/0x950 [ 23.956390] split_vma+0xc6/0x110 [ 23.956837] mprotect_fixup+0x8d2/0xb30 [ 23.957343] do_mprotect_pkey+0x87e/0xd40 [ 23.957864] __x64_sys_mprotect+0x78/0xc0 [ 23.958381] do_syscall_64+0x3f/0x90 [ 23.958860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959502] [ 23.959725] Freed by task 214: [ 23.960123] kasan_save_stack+0x22/0x50 [ 23.960629] kasan_set_track+0x25/0x30 [ 23.961127] kasan_save_free_info+0x2b/0x50 [ 23.961657] __kasan_slab_free+0x10a/0x190 [ 23.962189] kmem_cache_free+0x10d/0x4d0 [ 23.962700] rcu_core+0x8c8/0x2860 [ 23.963146] __do_softirq+0x1b7/0x7d4 [ 23.963624] [ 23.963839] Last potentially related work creation: [ 23.964424] kasan_save_stack+0x22/0x50 [ 23.964950] __kasan_record_aux_stack+0x8e/0xa0 [ 23.965525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.966170] remove_vma+0x139/0x170 [ 23.966624] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.967254] do_vmi_munmap+0x1f1/0x2b0 [ 23.967749] __vm_munmap+0x138/0x3a0 [ 23.968214] __x64_sys_munmap+0x59/0x80 [ 23.968732] do_syscall_64+0x3f/0x90 [ 23.969220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.969865] [ 23.970082] The buggy address belongs to the object at ffff8880094032b8 [ 23.970082] which belongs to the cache vm_area_struct of size 168 [ 23.971535] The buggy address is located 88 bytes inside of [ 23.971535] freed 168-byte region [ffff8880094032b8, ffff888009403360) [ 23.972955] [ 23.973173] The buggy address belongs to the physical page: [ 23.973831] page:0000000062ca24e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9403 [ 23.974904] memcg:ffff88800d397801 [ 23.975329] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.975972] page_type: 0xffffffff() [ 23.976423] raw: 0100000000000200 ffff8880087a0c80 ffffea000035e0c0 dead000000000002 [ 23.977360] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d397801 [ 23.978267] page dumped because: kasan: bad access detected [ 23.978932] [ 23.979148] Memory state around the buggy address: [ 23.979734] ffff888009403200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.980591] ffff888009403280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.981455] >ffff888009403300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.982333] ^ [ 23.982815] ffff888009403380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.983684] ffff888009403400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.984590] ================================================================== [ 23.985699] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.739083] BUG: Bad rss-counter state mm:00000000f57da43d type:MM_FILEPAGES val:33 [ 25.740200] BUG: Bad rss-counter state mm:00000000f57da43d type:MM_ANONPAGES val:22 [ 26.158250] BUG: Bad rss-counter state mm:0000000050227809 type:MM_FILEPAGES val:33 [ 26.159047] BUG: Bad rss-counter state mm:0000000050227809 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31807' (ECDSA) to the list of known hosts. 2023/06/20 17:02:47 fuzzer started 2023/06/20 17:02:47 dialing manager at localhost:36067 2023/06/20 17:02:47 checking machine... 2023/06/20 17:02:47 checking revisions... [ 26.932029] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:02:47 testing simple program... [ 26.981180] cgroup: Unknown subsys name 'net' [ 27.023121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810711 RSP=ffff888016f77d38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=0000000000000001 R14=ffffffff81ef10be R15=ffff888016145bd8 RIP=ffffffff815342e3 RFL=00000047 [---Z-PC] 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 00007fc74b407900 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=00007fc74b9bf0b0 CR3=000000001c680000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=ffff888008c04400 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=00007ffcbd74b7e8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f5388156510000055c79cf87790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000