[ 24.769936] BUG: Bad rss-counter state mm:00000000e330ffa5 type:MM_FILEPAGES val:33 [ 24.771350] BUG: Bad rss-counter state mm:00000000e330ffa5 type:MM_ANONPAGES val:22 [ 24.910270] ================================================================== [ 24.911351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.912564] Read of size 8 at addr ffff88800989e5c8 by task sshd/219 [ 24.913495] [ 24.913755] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.914765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.915912] Call Trace: [ 24.916326] [ 24.916657] dump_stack_lvl+0x91/0xf0 [ 24.917157] print_report+0xcc/0x620 [ 24.917634] ? __virt_addr_valid+0x102/0x340 [ 24.918189] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.918813] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.919440] kasan_report+0xbe/0xf0 [ 24.919916] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.920544] vma_interval_tree_remove+0xc75/0xec0 [ 24.921165] vma_prepare+0xc54/0x11a0 [ 24.921651] __split_vma+0x5af/0x950 [ 24.922137] ? __pfx___split_vma+0x10/0x10 [ 24.922669] ? find_held_lock+0x2c/0x110 [ 24.923195] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.923769] ? lock_is_held_type+0x9f/0x120 [ 24.924327] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.924954] ? mtree_range_walk+0x632/0x900 [ 24.925499] ? mas_walk+0x5c7/0x7c0 [ 24.925974] do_vmi_munmap+0x1f1/0x2b0 [ 24.926480] mmap_region+0x1f9/0x2660 [ 24.926959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.927472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.928220] ? __pfx_lock_acquire+0x10/0x10 [ 24.928756] ? __pfx_mmap_region+0x10/0x10 [ 24.929282] ? security_mmap_addr+0x7d/0xa0 [ 24.929818] ? get_unmapped_area+0x1f5/0x3f0 [ 24.930373] do_mmap+0x854/0xf00 [ 24.930825] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.931319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.931886] ksys_mmap_pgoff+0x3af/0x500 [ 24.932413] do_syscall_64+0x3f/0x90 [ 24.932895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.933559] RIP: 0033:0x7f31b9a89d82 [ 24.934024] 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 [ 24.936199] RSP: 002b:00007ffc31e24758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.937121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31b9a89d82 [ 24.937976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31b8ec3000 [ 24.938816] RBP: 00007f31b8ec3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.939669] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f783945f60 [ 24.940541] R13: 00007ffc31e24770 R14: 00007ffc31e247a0 R15: 00007ffc31e24b00 [ 24.941403] [ 24.941703] [ 24.941922] Allocated by task 212: [ 24.942351] kasan_save_stack+0x22/0x50 [ 24.942863] kasan_set_track+0x25/0x30 [ 24.943365] __kasan_slab_alloc+0x59/0x70 [ 24.943903] kmem_cache_alloc+0x16b/0x370 [ 24.944421] vm_area_dup+0x20/0x160 [ 24.944886] __split_vma+0x170/0x950 [ 24.945358] split_vma+0xc6/0x110 [ 24.945806] mprotect_fixup+0x8d2/0xb30 [ 24.946309] do_mprotect_pkey+0x87e/0xd40 [ 24.946828] __x64_sys_mprotect+0x78/0xc0 [ 24.947345] do_syscall_64+0x3f/0x90 [ 24.947824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.948497] [ 24.948711] Freed by task 212: [ 24.949107] kasan_save_stack+0x22/0x50 [ 24.949612] kasan_set_track+0x25/0x30 [ 24.950110] kasan_save_free_info+0x2b/0x50 [ 24.950647] __kasan_slab_free+0x10a/0x190 [ 24.951179] kmem_cache_free+0x10d/0x4d0 [ 24.951698] rcu_core+0x8c8/0x2860 [ 24.952151] __do_softirq+0x1b7/0x7d4 [ 24.952633] [ 24.952848] Last potentially related work creation: [ 24.953492] kasan_save_stack+0x22/0x50 [ 24.954006] __kasan_record_aux_stack+0x8e/0xa0 [ 24.954572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.955215] remove_vma+0x139/0x170 [ 24.955666] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.956240] do_vmi_munmap+0x1f1/0x2b0 [ 24.956735] __vm_munmap+0x138/0x3a0 [ 24.957216] __x64_sys_munmap+0x59/0x80 [ 24.957711] do_syscall_64+0x3f/0x90 [ 24.958193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.958840] [ 24.959055] Second to last potentially related work creation: [ 24.959733] kasan_save_stack+0x22/0x50 [ 24.960263] __kasan_record_aux_stack+0x8e/0xa0 [ 24.960836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.961484] remove_vma+0x139/0x170 [ 24.961937] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.962492] do_vmi_munmap+0x1f1/0x2b0 [ 24.962985] mmap_region+0x1f9/0x2660 [ 24.963460] do_mmap+0x854/0xf00 [ 24.963891] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.964396] ksys_mmap_pgoff+0x3af/0x500 [ 24.964897] do_syscall_64+0x3f/0x90 [ 24.965373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.966015] [ 24.966228] The buggy address belongs to the object at ffff88800989e570 [ 24.966228] which belongs to the cache vm_area_struct of size 168 [ 24.967715] The buggy address is located 88 bytes inside of [ 24.967715] freed 168-byte region [ffff88800989e570, ffff88800989e618) [ 24.969140] [ 24.969355] The buggy address belongs to the physical page: [ 24.970013] page:00000000547efc7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x989e [ 24.971117] memcg:ffff88800e976501 [ 24.971550] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.972256] page_type: 0xffffffff() [ 24.972715] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0cc0 dead000000000007 [ 24.973641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e976501 [ 24.974550] page dumped because: kasan: bad access detected [ 24.975214] [ 24.975431] Memory state around the buggy address: [ 24.976026] ffff88800989e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.976899] ffff88800989e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.977751] >ffff88800989e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.978602] ^ [ 24.979286] ffff88800989e600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.980161] ffff88800989e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.981013] ================================================================== [ 24.981944] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.383179] BUG: Bad rss-counter state mm:0000000002b943b3 type:MM_FILEPAGES val:33 [ 27.384364] BUG: Bad rss-counter state mm:0000000002b943b3 type:MM_ANONPAGES val:22 [ 27.716097] BUG: Bad rss-counter state mm:0000000023c46a56 type:MM_FILEPAGES val:33 [ 27.716859] BUG: Bad rss-counter state mm:0000000023c46a56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15996' (ECDSA) to the list of known hosts. 2023/06/20 04:29:56 fuzzer started 2023/06/20 04:29:56 dialing manager at localhost:44161 2023/06/20 04:29:56 checking machine... 2023/06/20 04:29:56 checking revisions... [ 28.501663] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:29:56 testing simple program... [ 28.594429] cgroup: Unknown subsys name 'net' [ 28.659486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002843ed7 RSP=ffff88801421f698 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800ec7ee58 R13=ffffffff81846723 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff781527900 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=00007ff781ade618 CR3=000000000e4dc000 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=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 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=0000000000000001 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=00007f83cb1d06b0 CR3=0000000014096000 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=fc801ea11d06a9a8d34b4e9c95391ae3 XMM02=000000000011cd20eff9b2d0a8fce9cb XMM03=000000000011cdf02c67c8bc2e329bc3 XMM04=fdec49e0213d86e100000000000ae988 XMM05=dfcdbad4f1609c370000000000134b10 XMM06=50b5f6920e24699e0000000000133ce8 XMM07=e042d86d42eb936e0000000000123ef0 XMM08=cafcecc11e8cd30a000000000011cdf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000