syzkaller login: [ 31.396766] BUG: Bad rss-counter state mm:00000000f5d07eae type:MM_FILEPAGES val:33 [ 31.397966] BUG: Bad rss-counter state mm:00000000f5d07eae type:MM_ANONPAGES val:22 [ 31.432773] ================================================================== [ 31.433917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.435089] Read of size 8 at addr ffff88801a1734e0 by task sshd/221 [ 31.435989] [ 31.436224] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.437149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.438220] Call Trace: [ 31.438564] [ 31.438877] dump_stack_lvl+0x91/0xf0 [ 31.439411] print_report+0xcc/0x620 [ 31.439951] ? __virt_addr_valid+0x102/0x340 [ 31.440557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.441231] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.441918] kasan_report+0xbe/0xf0 [ 31.442443] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.443106] vma_interval_tree_remove+0xc75/0xec0 [ 31.443690] vma_prepare+0xc54/0x11a0 [ 31.444188] __split_vma+0x5af/0x950 [ 31.444643] ? __pfx___split_vma+0x10/0x10 [ 31.445159] ? find_held_lock+0x2c/0x110 [ 31.445659] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.446215] ? lock_is_held_type+0x9f/0x120 [ 31.446733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.447331] ? mtree_range_walk+0x632/0x900 [ 31.447881] ? mas_walk+0x5c7/0x7c0 [ 31.448351] do_vmi_munmap+0x1f1/0x2b0 [ 31.448833] mmap_region+0x1f9/0x2660 [ 31.449303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.449796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.450483] ? __pfx_lock_acquire+0x10/0x10 [ 31.451007] ? __pfx_mmap_region+0x10/0x10 [ 31.451537] ? security_mmap_addr+0x7d/0xa0 [ 31.452073] ? get_unmapped_area+0x1f5/0x3f0 [ 31.452613] do_mmap+0x854/0xf00 [ 31.453043] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.453536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.454081] ksys_mmap_pgoff+0x3af/0x500 [ 31.454584] do_syscall_64+0x3f/0x90 [ 31.455043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.455674] RIP: 0033:0x7fe8e41f7d82 [ 31.456141] 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 [ 31.458203] RSP: 002b:00007ffcd7b19b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.459055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8e41f7d82 [ 31.459861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8e3631000 [ 31.460749] RBP: 00007fe8e3631000 R08: 0000000000000009 R09: 0000000000001000 [ 31.461987] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625f44aa980 [ 31.462989] R13: 00007ffcd7b19b50 R14: 00007ffcd7b19b80 R15: 00007ffcd7b19ee0 [ 31.464036] [ 31.464380] [ 31.464631] Allocated by task 213: [ 31.465135] kasan_save_stack+0x22/0x50 [ 31.465733] kasan_set_track+0x25/0x30 [ 31.466315] __kasan_slab_alloc+0x59/0x70 [ 31.466928] kmem_cache_alloc+0x16b/0x370 [ 31.467535] vm_area_dup+0x20/0x160 [ 31.468102] __split_vma+0x170/0x950 [ 31.468649] split_vma+0xc6/0x110 [ 31.469163] mprotect_fixup+0x8d2/0xb30 [ 31.469752] do_mprotect_pkey+0x87e/0xd40 [ 31.470349] __x64_sys_mprotect+0x78/0xc0 [ 31.470923] do_syscall_64+0x3f/0x90 [ 31.471466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472187] [ 31.472433] Freed by task 202: [ 31.472877] kasan_save_stack+0x22/0x50 [ 31.473438] kasan_set_track+0x25/0x30 [ 31.473987] kasan_save_free_info+0x2b/0x50 [ 31.474586] __kasan_slab_free+0x10a/0x190 [ 31.475185] kmem_cache_free+0x10d/0x4d0 [ 31.475750] rcu_core+0x8c8/0x2860 [ 31.476282] __do_softirq+0x1b7/0x7d4 [ 31.476839] [ 31.477086] Last potentially related work creation: [ 31.477729] kasan_save_stack+0x22/0x50 [ 31.478230] __kasan_record_aux_stack+0x8e/0xa0 [ 31.478803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.479455] remove_vma+0x139/0x170 [ 31.479919] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.480479] do_vmi_munmap+0x1f1/0x2b0 [ 31.480971] __vm_munmap+0x138/0x3a0 [ 31.481442] __x64_sys_munmap+0x59/0x80 [ 31.481932] do_syscall_64+0x3f/0x90 [ 31.482402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.483053] [ 31.483273] The buggy address belongs to the object at ffff88801a173488 [ 31.483273] which belongs to the cache vm_area_struct of size 168 [ 31.484772] The buggy address is located 88 bytes inside of [ 31.484772] freed 168-byte region [ffff88801a173488, ffff88801a173530) [ 31.486193] [ 31.486434] The buggy address belongs to the physical page: [ 31.487148] page:00000000ae811f4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a173 [ 31.488226] memcg:ffff88800da77f01 [ 31.488633] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.489353] page_type: 0xffffffff() [ 31.489780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.490658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da77f01 [ 31.491526] page dumped because: kasan: bad access detected [ 31.492164] [ 31.492377] Memory state around the buggy address: [ 31.492933] ffff88801a173380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.493749] ffff88801a173400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.494567] >ffff88801a173480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.495377] ^ [ 31.496099] ffff88801a173500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.496915] ffff88801a173580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.497728] ================================================================== [ 31.498701] Disabling lock debugging due to kernel taint [ 33.556168] BUG: Bad rss-counter state mm:00000000b642915d type:MM_FILEPAGES val:33 [ 33.557373] BUG: Bad rss-counter state mm:00000000b642915d type:MM_ANONPAGES val:22 [ 34.163461] BUG: Bad rss-counter state mm:00000000949c6865 type:MM_FILEPAGES val:33 [ 34.164564] BUG: Bad rss-counter state mm:00000000949c6865 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41133' (ECDSA) to the list of known hosts. 2023/06/21 10:49:12 fuzzer started 2023/06/21 10:49:13 dialing manager at localhost:36067 2023/06/21 10:49:13 checking machine... 2023/06/21 10:49:13 checking revisions... [ 34.828368] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:49:13 testing simple program... [ 34.879017] cgroup: Unknown subsys name 'net' [ 34.942140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:12 Registers: info registers vcpu 0 RAX=ffffffff83650bf8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff83650bf8 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ad19 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880159d0000 R15=ffff88800ea06d90 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007f6b7a580900 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=00007f6b7ab380b0 CR3=000000000ec30000 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=ffffffff861386f3 RBX=0000000000000001 RCX=ffffffff861386ee RDX=0000000000000000 RSI=1ffffffff0c270de RDI=ffffffff85dfdb08 RBP=ffff88801589f570 RSP=ffff88801589f4a8 R8 =ffffffff861386ee R9 =ffff88801589f558 R10=0000000000038001 R11=0000000000020c51 R12=ffff88801589f578 R13=ffff88801589f560 R14=ffff88801589f559 R15=ffff88801589f518 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 00007f3902dce900 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=00007f3902201280 CR3=000000000c9b6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e8c3e1a11ac2879100000000000ae988 XMM05=69c08ddae1c725990000000000131be8 XMM06=c291bd5c70af25b900000000001309d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000