[ 32.263636] BUG: Bad rss-counter state mm:0000000021227503 type:MM_FILEPAGES val:33 [ 32.264964] BUG: Bad rss-counter state mm:0000000021227503 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.428730] ================================================================== [ 32.429654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.430593] Read of size 8 at addr ffff88800c62bd08 by task sshd/219 [ 32.431371] [ 32.431592] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.432543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.433512] Call Trace: [ 32.433836] [ 32.434135] dump_stack_lvl+0x91/0xf0 [ 32.434635] print_report+0xcc/0x620 [ 32.435118] ? __virt_addr_valid+0x102/0x340 [ 32.435668] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.436285] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.436900] kasan_report+0xbe/0xf0 [ 32.437377] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.438004] vma_interval_tree_remove+0xc75/0xec0 [ 32.438613] vma_prepare+0xc54/0x11a0 [ 32.439102] __split_vma+0x5af/0x950 [ 32.439572] ? __pfx___split_vma+0x10/0x10 [ 32.440102] ? find_held_lock+0x2c/0x110 [ 32.440619] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.441186] ? lock_is_held_type+0x9f/0x120 [ 32.441725] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.442339] ? mtree_range_walk+0x632/0x900 [ 32.442909] ? mas_walk+0x5c7/0x7c0 [ 32.443385] do_vmi_munmap+0x1f1/0x2b0 [ 32.443880] mmap_region+0x1f9/0x2660 [ 32.444359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.444868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.445584] ? __pfx_lock_acquire+0x10/0x10 [ 32.446108] ? __pfx_mmap_region+0x10/0x10 [ 32.446644] ? security_mmap_addr+0x7d/0xa0 [ 32.447185] ? get_unmapped_area+0x1f5/0x3f0 [ 32.447739] do_mmap+0x854/0xf00 [ 32.448178] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.448677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.449241] ksys_mmap_pgoff+0x3af/0x500 [ 32.449752] do_syscall_64+0x3f/0x90 [ 32.450235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.450903] RIP: 0033:0x7f563d34dd82 [ 32.451360] 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 [ 32.453498] RSP: 002b:00007ffe78ac30e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.454408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f563d34dd82 [ 32.455269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f563c787000 [ 32.456118] RBP: 00007f563c787000 R08: 0000000000000009 R09: 0000000000001000 [ 32.456964] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c284507b20 [ 32.457811] R13: 00007ffe78ac3100 R14: 00007ffe78ac3130 R15: 00007ffe78ac3490 [ 32.458684] [ 32.458976] [ 32.459189] Allocated by task 212: [ 32.459621] kasan_save_stack+0x22/0x50 [ 32.460131] kasan_set_track+0x25/0x30 [ 32.460621] __kasan_slab_alloc+0x59/0x70 [ 32.461144] kmem_cache_alloc+0x16b/0x370 [ 32.461658] vm_area_dup+0x20/0x160 [ 32.462119] __split_vma+0x170/0x950 [ 32.462598] split_vma+0xc6/0x110 [ 32.463041] mprotect_fixup+0x8d2/0xb30 [ 32.463541] do_mprotect_pkey+0x87e/0xd40 [ 32.464065] __x64_sys_mprotect+0x78/0xc0 [ 32.464580] do_syscall_64+0x3f/0x90 [ 32.465058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.465703] [ 32.465919] Freed by task 212: [ 32.466315] kasan_save_stack+0x22/0x50 [ 32.466822] kasan_set_track+0x25/0x30 [ 32.467317] kasan_save_free_info+0x2b/0x50 [ 32.467852] __kasan_slab_free+0x10a/0x190 [ 32.468386] kmem_cache_free+0x10d/0x4d0 [ 32.468892] rcu_core+0x8c8/0x2860 [ 32.469336] __do_softirq+0x1b7/0x7d4 [ 32.469806] [ 32.470020] Last potentially related work creation: [ 32.470627] kasan_save_stack+0x22/0x50 [ 32.471135] __kasan_record_aux_stack+0x8e/0xa0 [ 32.471707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.472355] remove_vma+0x139/0x170 [ 32.472807] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.473361] do_vmi_munmap+0x1f1/0x2b0 [ 32.473843] __vm_munmap+0x138/0x3a0 [ 32.474309] __x64_sys_munmap+0x59/0x80 [ 32.474818] do_syscall_64+0x3f/0x90 [ 32.475293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.475934] [ 32.476148] The buggy address belongs to the object at ffff88800c62bcb0 [ 32.476148] which belongs to the cache vm_area_struct of size 168 [ 32.477615] The buggy address is located 88 bytes inside of [ 32.477615] freed 168-byte region [ffff88800c62bcb0, ffff88800c62bd58) [ 32.479040] [ 32.479259] The buggy address belongs to the physical page: [ 32.479923] page:000000008ab36d1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc62b [ 32.481004] memcg:ffff88801a048201 [ 32.481433] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.482079] page_type: 0xffffffff() [ 32.482528] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.483466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a048201 [ 32.484368] page dumped because: kasan: bad access detected [ 32.485035] [ 32.485252] Memory state around the buggy address: [ 32.485837] ffff88800c62bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.486705] ffff88800c62bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.487565] >ffff88800c62bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.488421] ^ [ 32.488859] ffff88800c62bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.489732] ffff88800c62be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.490597] ================================================================== [ 32.491565] Disabling lock debugging due to kernel taint [ 34.787905] BUG: Bad rss-counter state mm:000000003233b515 type:MM_FILEPAGES val:33 [ 34.789114] BUG: Bad rss-counter state mm:000000003233b515 type:MM_ANONPAGES val:22 [ 35.161659] BUG: Bad rss-counter state mm:00000000b105f0ab type:MM_FILEPAGES val:33 [ 35.162657] BUG: Bad rss-counter state mm:00000000b105f0ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64941' (ECDSA) to the list of known hosts. 2023/06/20 04:12:50 fuzzer started 2023/06/20 04:12:51 dialing manager at localhost:44161 2023/06/20 04:12:51 checking machine... 2023/06/20 04:12:51 checking revisions... [ 35.912394] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:12:51 testing simple program... [ 35.952917] cgroup: Unknown subsys name 'net' [ 36.000475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000ffffffff RDI=00007fbe8c35620b RBP=0000000000000000 RSP=00007ffdd8bb8470 R8 =0000000000008000 R9 =0000000000000000 R10=0000000000000001 R11=000055ff4c87d338 R12=000055ff4c858350 R13=000055ff4c858350 R14=0000000000000000 R15=000055ff4c878680 RIP=00007fbe8cebe0b5 RFL=00000246 [---Z-P-] 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 00007fbe8c398900 00000000 00000000 GS =0000 0000000000000000 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=00007fbe8c9500b0 CR3=00000000146ae000 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=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 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=00007fa0c959ff70 CR3=0000000013aa4000 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=a4daaf4017375ebbe24f03825aeba618 XMM02=ec2efd57dc4c00df000000000011d678 XMM03=6b30619f1e095d19000000000011d748 XMM04=a04b5e2a13a0658c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133d30 XMM06=806171799158d9670000000000133bb8 XMM07=e042d86d42eb936e0000000000124788 XMM08=6b30619f1e095d19000000000011d748 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000