[ 25.104783] BUG: Bad rss-counter state mm:000000003525e8b2 type:MM_FILEPAGES val:33 [ 25.106266] BUG: Bad rss-counter state mm:000000003525e8b2 type:MM_ANONPAGES val:22 [ 25.272004] ================================================================== [ 25.273089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.274203] Read of size 8 at addr ffff88800e48f140 by task sshd/219 [ 25.275211] [ 25.275471] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.276382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.277368] Call Trace: [ 25.277692] [ 25.277983] dump_stack_lvl+0x91/0xf0 [ 25.278471] print_report+0xcc/0x620 [ 25.278967] ? __virt_addr_valid+0x102/0x340 [ 25.279524] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.280148] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.280774] kasan_report+0xbe/0xf0 [ 25.281245] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.281872] vma_interval_tree_remove+0xc75/0xec0 [ 25.282480] vma_prepare+0xc54/0x11a0 [ 25.282960] __split_vma+0x5af/0x950 [ 25.283429] ? __pfx___split_vma+0x10/0x10 [ 25.283969] ? find_held_lock+0x2c/0x110 [ 25.284498] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.285089] ? lock_is_held_type+0x9f/0x120 [ 25.285636] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.286240] ? mtree_range_walk+0x632/0x900 [ 25.286799] ? mas_walk+0x5c7/0x7c0 [ 25.287275] do_vmi_munmap+0x1f1/0x2b0 [ 25.287774] mmap_region+0x1f9/0x2660 [ 25.288263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.288788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.289509] ? __pfx_lock_acquire+0x10/0x10 [ 25.290051] ? __pfx_mmap_region+0x10/0x10 [ 25.290586] ? security_mmap_addr+0x7d/0xa0 [ 25.291117] ? get_unmapped_area+0x1f5/0x3f0 [ 25.291676] do_mmap+0x854/0xf00 [ 25.292129] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.292639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.293215] ksys_mmap_pgoff+0x3af/0x500 [ 25.293729] do_syscall_64+0x3f/0x90 [ 25.294205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.294856] RIP: 0033:0x7f2a0ca8cd82 [ 25.295316] 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 [ 25.297479] RSP: 002b:00007fff3e396498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.298395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a0ca8cd82 [ 25.299236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a0bec6000 [ 25.300097] RBP: 00007f2a0bec6000 R08: 0000000000000009 R09: 0000000000001000 [ 25.300973] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4b0f54f60 [ 25.301822] R13: 00007fff3e3964b0 R14: 00007fff3e3964e0 R15: 00007fff3e396840 [ 25.302682] [ 25.302975] [ 25.303190] Allocated by task 212: [ 25.303621] kasan_save_stack+0x22/0x50 [ 25.304126] kasan_set_track+0x25/0x30 [ 25.304644] __kasan_slab_alloc+0x59/0x70 [ 25.305180] kmem_cache_alloc+0x16b/0x370 [ 25.305696] vm_area_dup+0x20/0x160 [ 25.306163] __split_vma+0x170/0x950 [ 25.306644] split_vma+0xc6/0x110 [ 25.307092] mprotect_fixup+0x8d2/0xb30 [ 25.307600] do_mprotect_pkey+0x87e/0xd40 [ 25.308124] __x64_sys_mprotect+0x78/0xc0 [ 25.308664] do_syscall_64+0x3f/0x90 [ 25.309145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.309787] [ 25.310004] Freed by task 210: [ 25.310405] kasan_save_stack+0x22/0x50 [ 25.310909] kasan_set_track+0x25/0x30 [ 25.311403] kasan_save_free_info+0x2b/0x50 [ 25.311935] __kasan_slab_free+0x10a/0x190 [ 25.312468] kmem_cache_free+0x10d/0x4d0 [ 25.313007] rcu_core+0x8c8/0x2860 [ 25.313453] __do_softirq+0x1b7/0x7d4 [ 25.313933] [ 25.314152] Last potentially related work creation: [ 25.314741] kasan_save_stack+0x22/0x50 [ 25.315251] __kasan_record_aux_stack+0x8e/0xa0 [ 25.315829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.316466] remove_vma+0x139/0x170 [ 25.316930] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.317494] do_vmi_munmap+0x1f1/0x2b0 [ 25.317980] __vm_munmap+0x138/0x3a0 [ 25.318450] __x64_sys_munmap+0x59/0x80 [ 25.318953] do_syscall_64+0x3f/0x90 [ 25.319428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.320068] [ 25.320290] Second to last potentially related work creation: [ 25.320993] kasan_save_stack+0x22/0x50 [ 25.321507] __kasan_record_aux_stack+0x8e/0xa0 [ 25.322088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.322724] remove_vma+0x139/0x170 [ 25.323181] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.323743] do_vmi_munmap+0x1f1/0x2b0 [ 25.324238] mmap_region+0x1f9/0x2660 [ 25.324737] do_mmap+0x854/0xf00 [ 25.325178] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.325672] ksys_mmap_pgoff+0x3af/0x500 [ 25.326176] do_syscall_64+0x3f/0x90 [ 25.326648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.327298] [ 25.327512] The buggy address belongs to the object at ffff88800e48f0e8 [ 25.327512] which belongs to the cache vm_area_struct of size 168 [ 25.329002] The buggy address is located 88 bytes inside of [ 25.329002] freed 168-byte region [ffff88800e48f0e8, ffff88800e48f190) [ 25.330413] [ 25.330633] The buggy address belongs to the physical page: [ 25.331299] page:00000000c5212767 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe48f [ 25.332387] memcg:ffff88800e886501 [ 25.332837] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.333534] page_type: 0xffffffff() [ 25.333989] raw: 0100000000000200 ffff88800879fc80 ffffea0000374e40 dead000000000007 [ 25.334910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e886501 [ 25.335813] page dumped because: kasan: bad access detected [ 25.336484] [ 25.336705] Memory state around the buggy address: [ 25.337281] ffff88800e48f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.338136] ffff88800e48f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 25.338991] >ffff88800e48f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.339836] ^ [ 25.340481] ffff88800e48f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 25.341364] ffff88800e48f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.342226] ================================================================== [ 25.343219] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.072911] BUG: Bad rss-counter state mm:000000008555b4a0 type:MM_FILEPAGES val:33 [ 27.073714] BUG: Bad rss-counter state mm:000000008555b4a0 type:MM_ANONPAGES val:22 [ 27.529450] BUG: Bad rss-counter state mm:0000000016103b34 type:MM_FILEPAGES val:33 [ 27.530720] BUG: Bad rss-counter state mm:0000000016103b34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15876' (ECDSA) to the list of known hosts. 2023/06/19 22:07:34 fuzzer started 2023/06/19 22:07:34 dialing manager at localhost:44161 2023/06/19 22:07:34 checking machine... 2023/06/19 22:07:34 checking revisions... [ 28.258031] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:07:34 testing simple program... [ 28.303472] cgroup: Unknown subsys name 'net' [ 28.341425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000009 RDX=0000000000000003 RSI=0000000000000010 RDI=ffff888019233980 RBP=0000000000000010 RSP=ffff888016ee7e18 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000009 R14=ffff888019233980 R15=00000000ffffff9f RIP=ffffffff81ef5694 RFL=00000293 [--S-A-C] 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 00007fd8818f0900 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=00007fd881ea80b0 CR3=000000000c5f6000 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=2033333a37303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a37303a3232203931 XMM08=3d656e696c646d632022656369767265 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=00007fd50b968520 CR3=000000000d868000 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=0a850a0537703fbf284ba7dc1725eca7 XMM02=2c67c8bc2e329bc3000000000011fc08 XMM03=fb795ef6d657705600000000001238b0 XMM04=9305e4e6f6f26f2800000000000ae988 XMM05=dfcdbad4f1609c370000000000134438 XMM06=ac6700d849cf2c210000000000133610 XMM07=e042d86d42eb936e0000000000123b30 XMM08=fd66801b8539e514000000000011fc68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000