[ 60.177766] BUG: Bad rss-counter state mm:0000000029f3b3ff type:MM_FILEPAGES val:33 [ 60.178950] BUG: Bad rss-counter state mm:0000000029f3b3ff type:MM_ANONPAGES val:22 [ 60.378670] ================================================================== [ 60.379799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.380820] Read of size 8 at addr ffff88800ee1ded8 by task sshd/222 [ 60.381773] [ 60.382000] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.382872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.383884] Call Trace: [ 60.384204] [ 60.384493] dump_stack_lvl+0x91/0xf0 [ 60.384984] print_report+0xcc/0x620 [ 60.385475] ? __virt_addr_valid+0x102/0x340 [ 60.386034] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.386649] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.387286] kasan_report+0xbe/0xf0 [ 60.387818] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.388450] vma_interval_tree_remove+0xc75/0xec0 [ 60.389054] vma_prepare+0xc54/0x11a0 [ 60.389545] __split_vma+0x5af/0x950 [ 60.390022] ? __pfx___split_vma+0x10/0x10 [ 60.390544] ? find_held_lock+0x2c/0x110 [ 60.391067] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.391636] ? lock_is_held_type+0x9f/0x120 [ 60.392172] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.392781] ? mtree_range_walk+0x632/0x900 [ 60.393330] ? mas_walk+0x5c7/0x7c0 [ 60.393801] do_vmi_munmap+0x1f1/0x2b0 [ 60.394294] mmap_region+0x1f9/0x2660 [ 60.394773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.395281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.396014] ? __pfx_lock_acquire+0x10/0x10 [ 60.396568] ? __pfx_mmap_region+0x10/0x10 [ 60.397100] ? security_mmap_addr+0x7d/0xa0 [ 60.397625] ? get_unmapped_area+0x1f5/0x3f0 [ 60.398171] do_mmap+0x854/0xf00 [ 60.398614] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.399116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.399692] ksys_mmap_pgoff+0x3af/0x500 [ 60.400196] do_syscall_64+0x3f/0x90 [ 60.400677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.401316] RIP: 0033:0x7fcdd2fc8d82 [ 60.401776] 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 [ 60.403896] RSP: 002b:00007ffc5d771058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.404798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdd2fc8d82 [ 60.405637] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdd2402000 [ 60.406469] RBP: 00007fcdd2402000 R08: 0000000000000009 R09: 0000000000001000 [ 60.407308] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcf9c97ec0 [ 60.408157] R13: 00007ffc5d771070 R14: 00007ffc5d7710a0 R15: 00007ffc5d771400 [ 60.409012] [ 60.409303] [ 60.409518] Allocated by task 212: [ 60.409942] kasan_save_stack+0x22/0x50 [ 60.410444] kasan_set_track+0x25/0x30 [ 60.410938] __kasan_slab_alloc+0x59/0x70 [ 60.411479] kmem_cache_alloc+0x16b/0x370 [ 60.411996] vm_area_dup+0x20/0x160 [ 60.412448] __split_vma+0x170/0x950 [ 60.412920] split_vma+0xc6/0x110 [ 60.413360] mprotect_fixup+0x8d2/0xb30 [ 60.413872] do_mprotect_pkey+0x87e/0xd40 [ 60.414390] __x64_sys_mprotect+0x78/0xc0 [ 60.414913] do_syscall_64+0x3f/0x90 [ 60.415387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.416038] [ 60.416260] Freed by task 212: [ 60.416652] kasan_save_stack+0x22/0x50 [ 60.417153] kasan_set_track+0x25/0x30 [ 60.417648] kasan_save_free_info+0x2b/0x50 [ 60.418176] __kasan_slab_free+0x10a/0x190 [ 60.418704] kmem_cache_free+0x10d/0x4d0 [ 60.419208] rcu_core+0x8c8/0x2860 [ 60.419657] __do_softirq+0x1b7/0x7d4 [ 60.420131] [ 60.420347] Last potentially related work creation: [ 60.420940] kasan_save_stack+0x22/0x50 [ 60.421439] __kasan_record_aux_stack+0x8e/0xa0 [ 60.422010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.422759] remove_vma+0x139/0x170 [ 60.423211] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.423777] do_vmi_munmap+0x1f1/0x2b0 [ 60.424259] __vm_munmap+0x138/0x3a0 [ 60.424728] __x64_sys_munmap+0x59/0x80 [ 60.425226] do_syscall_64+0x3f/0x90 [ 60.425695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.426329] [ 60.426552] Second to last potentially related work creation: [ 60.427229] kasan_save_stack+0x22/0x50 [ 60.427736] __kasan_record_aux_stack+0x8e/0xa0 [ 60.428305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.428953] remove_vma+0x139/0x170 [ 60.429405] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.429971] do_vmi_munmap+0x1f1/0x2b0 [ 60.430453] mmap_region+0x1f9/0x2660 [ 60.430932] do_mmap+0x854/0xf00 [ 60.431364] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.431878] ksys_mmap_pgoff+0x3af/0x500 [ 60.432382] do_syscall_64+0x3f/0x90 [ 60.432856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.433505] [ 60.433718] The buggy address belongs to the object at ffff88800ee1de80 [ 60.433718] which belongs to the cache vm_area_struct of size 168 [ 60.435227] The buggy address is located 88 bytes inside of [ 60.435227] freed 168-byte region [ffff88800ee1de80, ffff88800ee1df28) [ 60.436643] [ 60.436865] The buggy address belongs to the physical page: [ 60.437523] page:00000000ea3117c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee1d [ 60.438608] memcg:ffff88800e685601 [ 60.439037] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.439744] page_type: 0xffffffff() [ 60.440200] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 60.441129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e685601 [ 60.442044] page dumped because: kasan: bad access detected [ 60.442705] [ 60.442920] Memory state around the buggy address: [ 60.443515] ffff88800ee1dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.444366] ffff88800ee1de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.445223] >ffff88800ee1de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.446082] ^ [ 60.446811] ffff88800ee1df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.447676] ffff88800ee1df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.448531] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 60.450269] Disabling lock debugging due to kernel taint [ 62.419756] BUG: Bad rss-counter state mm:0000000027c39c78 type:MM_FILEPAGES val:33 [ 62.420669] BUG: Bad rss-counter state mm:0000000027c39c78 type:MM_ANONPAGES val:22 [ 63.094111] BUG: Bad rss-counter state mm:00000000fa5d4e64 type:MM_FILEPAGES val:33 [ 63.095286] BUG: Bad rss-counter state mm:00000000fa5d4e64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65410' (ECDSA) to the list of known hosts. 2023/06/20 01:28:10 fuzzer started 2023/06/20 01:28:10 dialing manager at localhost:44161 2023/06/20 01:28:10 checking machine... 2023/06/20 01:28:10 checking revisions... [ 63.736966] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:28:10 testing simple program... [ 63.792197] cgroup: Unknown subsys name 'net' [ 63.891253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:04 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810591 RBP=ffff888008d7fd38 RSP=ffff888008d7fd18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff8880087b0500 R13=ffffea000066df80 R14=ffffffff813782a8 R15=ffff888019b7e398 RIP=ffffffff81809966 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 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=00007fd3f30e4000 CR3=0000000016cf4000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880191f73d8 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880191f73c8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e47 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 00007f0ee4c26700 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=00007ff5569c2650 CR3=000000000cc0e000 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=2030313a38323a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a38323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000