[ 24.375152] sshd (208) used greatest stack depth: 23992 bytes left [ 24.376060] BUG: Bad rss-counter state mm:00000000c01c34d8 type:MM_FILEPAGES val:33 [ 24.377487] BUG: Bad rss-counter state mm:00000000c01c34d8 type:MM_ANONPAGES val:22 [ 24.524786] ================================================================== [ 24.525673] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.526598] Read of size 8 at addr ffff88800e3523f8 by task sshd/219 [ 24.527463] [ 24.527683] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.528540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.529525] Call Trace: [ 24.529843] [ 24.530123] dump_stack_lvl+0x91/0xf0 [ 24.530610] print_report+0xcc/0x620 [ 24.531092] ? __virt_addr_valid+0x102/0x340 [ 24.531659] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.532272] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.532878] kasan_report+0xbe/0xf0 [ 24.533344] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.533962] vma_interval_tree_remove+0xc75/0xec0 [ 24.534558] vma_prepare+0xc54/0x11a0 [ 24.535039] __split_vma+0x5af/0x950 [ 24.535521] ? __pfx___split_vma+0x10/0x10 [ 24.536051] ? find_held_lock+0x2c/0x110 [ 24.536570] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.537140] ? lock_is_held_type+0x9f/0x120 [ 24.537684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.538287] ? mtree_range_walk+0x632/0x900 [ 24.538839] ? mas_walk+0x5c7/0x7c0 [ 24.539316] do_vmi_munmap+0x1f1/0x2b0 [ 24.539821] mmap_region+0x1f9/0x2660 [ 24.540303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.540813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.541527] ? __pfx_lock_acquire+0x10/0x10 [ 24.542061] ? __pfx_mmap_region+0x10/0x10 [ 24.542586] ? security_mmap_addr+0x7d/0xa0 [ 24.543118] ? get_unmapped_area+0x1f5/0x3f0 [ 24.543689] do_mmap+0x854/0xf00 [ 24.544125] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.544616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.545179] ksys_mmap_pgoff+0x3af/0x500 [ 24.545688] do_syscall_64+0x3f/0x90 [ 24.546162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.546813] RIP: 0033:0x7f529706cd82 [ 24.547267] 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 [ 24.549414] RSP: 002b:00007fffbb446188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.550325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f529706cd82 [ 24.551179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52964a6000 [ 24.552036] RBP: 00007f52964a6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.552890] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561030e92ec0 [ 24.553734] R13: 00007fffbb4461a0 R14: 00007fffbb4461d0 R15: 00007fffbb446530 [ 24.554590] [ 24.554880] [ 24.555098] Allocated by task 208: [ 24.555533] kasan_save_stack+0x22/0x50 [ 24.556032] kasan_set_track+0x25/0x30 [ 24.556525] __kasan_slab_alloc+0x59/0x70 [ 24.557041] kmem_cache_alloc+0x16b/0x370 [ 24.557548] vm_area_dup+0x20/0x160 [ 24.558001] __split_vma+0x170/0x950 [ 24.558468] split_vma+0xc6/0x110 [ 24.558913] mprotect_fixup+0x8d2/0xb30 [ 24.559419] do_mprotect_pkey+0x87e/0xd40 [ 24.559937] __x64_sys_mprotect+0x78/0xc0 [ 24.560456] do_syscall_64+0x3f/0x90 [ 24.560928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.561567] [ 24.561782] Freed by task 208: [ 24.562172] kasan_save_stack+0x22/0x50 [ 24.562674] kasan_set_track+0x25/0x30 [ 24.563171] kasan_save_free_info+0x2b/0x50 [ 24.563725] __kasan_slab_free+0x10a/0x190 [ 24.564256] kmem_cache_free+0x10d/0x4d0 [ 24.564771] rcu_core+0x8c8/0x2860 [ 24.565219] __do_softirq+0x1b7/0x7d4 [ 24.565700] [ 24.565915] Last potentially related work creation: [ 24.566493] kasan_save_stack+0x22/0x50 [ 24.566994] __kasan_record_aux_stack+0x8e/0xa0 [ 24.567569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.568212] remove_vma+0x139/0x170 [ 24.568659] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.569215] do_vmi_munmap+0x1f1/0x2b0 [ 24.569696] __vm_munmap+0x138/0x3a0 [ 24.570166] __x64_sys_munmap+0x59/0x80 [ 24.570670] do_syscall_64+0x3f/0x90 [ 24.571138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.571782] [ 24.571996] The buggy address belongs to the object at ffff88800e3523a0 [ 24.571996] which belongs to the cache vm_area_struct of size 168 [ 24.573452] The buggy address is located 88 bytes inside of [ 24.573452] freed 168-byte region [ffff88800e3523a0, ffff88800e352448) [ 24.574855] [ 24.575070] The buggy address belongs to the physical page: [ 24.575750] page:00000000c5575cce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe352 [ 24.576835] memcg:ffff88800ec93e01 [ 24.577263] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.577908] page_type: 0xffffffff() [ 24.578362] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.579280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec93e01 [ 24.580191] page dumped because: kasan: bad access detected [ 24.580851] [ 24.581068] Memory state around the buggy address: [ 24.581636] ffff88800e352280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.582486] ffff88800e352300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.583361] >ffff88800e352380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.584220] ^ [ 24.585054] ffff88800e352400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.585919] ffff88800e352480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.586777] ================================================================== [ 24.587752] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.352864] BUG: Bad rss-counter state mm:00000000e59c3fb2 type:MM_FILEPAGES val:33 [ 26.353879] BUG: Bad rss-counter state mm:00000000e59c3fb2 type:MM_ANONPAGES val:22 [ 26.781714] BUG: Bad rss-counter state mm:00000000d85b3d39 type:MM_FILEPAGES val:33 [ 26.782698] BUG: Bad rss-counter state mm:00000000d85b3d39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42520' (ECDSA) to the list of known hosts. 2023/06/20 15:26:27 fuzzer started 2023/06/20 15:26:28 dialing manager at localhost:36067 2023/06/20 15:26:28 checking machine... 2023/06/20 15:26:28 checking revisions... [ 27.542039] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:26:28 testing simple program... [ 27.582385] cgroup: Unknown subsys name 'net' [ 27.641245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:26:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f71db8165e0 CR3=0000000009348000 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=9ea2e317b07ee5b6a648150192cf26ed XMM02=ec2efd57dc4c00df000000000011b200 XMM03=08f5cabc99e0982a000000000011b2d0 XMM04=6faeaf52a07e8c0100000000000ae988 XMM05=1fb4ca08cf2abc0100000000001326f8 XMM06=806171799158d9670000000000131178 XMM07=fb795ef6d657705600000000001207e8 XMM08=2c67c8bc2e329bc3000000000011b270 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffffffff856d84a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a4 RBP=1ffff11002b06f85 RSP=ffff888015837c20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff88801a0fc768 R15=ffff88801a0fc720 RIP=ffffffff812e009a 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 00007fe7d4a00900 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=00007fe7d4fb7618 CR3=000000000f986000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000