[ 23.616631] BUG: Bad rss-counter state mm:0000000095220100 type:MM_FILEPAGES val:33 [ 23.617398] BUG: Bad rss-counter state mm:0000000095220100 type:MM_ANONPAGES val:22 [ 23.735253] ================================================================== [ 23.735973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.736725] Read of size 8 at addr ffff88800e379b38 by task sshd/220 [ 23.737322] [ 23.737489] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.738149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.738991] Call Trace: [ 23.739275] [ 23.739500] dump_stack_lvl+0x91/0xf0 [ 23.739879] print_report+0xcc/0x620 [ 23.740256] ? __virt_addr_valid+0x102/0x340 [ 23.740711] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.741182] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.741642] kasan_report+0xbe/0xf0 [ 23.741979] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.742415] vma_interval_tree_remove+0xc75/0xec0 [ 23.742837] vma_prepare+0xc54/0x11a0 [ 23.743172] __split_vma+0x5af/0x950 [ 23.743504] ? __pfx___split_vma+0x10/0x10 [ 23.743884] ? find_held_lock+0x2c/0x110 [ 23.744251] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.744658] ? lock_is_held_type+0x9f/0x120 [ 23.745043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.745474] ? mtree_range_walk+0x632/0x900 [ 23.745864] ? mas_walk+0x5c7/0x7c0 [ 23.746203] do_vmi_munmap+0x1f1/0x2b0 [ 23.746556] mmap_region+0x1f9/0x2660 [ 23.746893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.747256] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.747784] ? __pfx_lock_acquire+0x10/0x10 [ 23.748161] ? __pfx_mmap_region+0x10/0x10 [ 23.748538] ? security_mmap_addr+0x7d/0xa0 [ 23.748920] ? get_unmapped_area+0x1f5/0x3f0 [ 23.749314] do_mmap+0x854/0xf00 [ 23.749632] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.749979] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.750374] ksys_mmap_pgoff+0x3af/0x500 [ 23.750727] do_syscall_64+0x3f/0x90 [ 23.751070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.751529] RIP: 0033:0x7f168a7cbd82 [ 23.751856] 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 [ 23.753402] RSP: 002b:00007ffeca12f278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.754044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f168a7cbd82 [ 23.754649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1689c05000 [ 23.755250] RBP: 00007f1689c05000 R08: 0000000000000009 R09: 0000000000001000 [ 23.755857] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a8cfffec0 [ 23.756464] R13: 00007ffeca12f290 R14: 00007ffeca12f2c0 R15: 00007ffeca12f620 [ 23.757081] [ 23.757290] [ 23.757440] Allocated by task 213: [ 23.757744] kasan_save_stack+0x22/0x50 [ 23.758102] kasan_set_track+0x25/0x30 [ 23.758485] __kasan_slab_alloc+0x59/0x70 [ 23.758857] kmem_cache_alloc+0x16b/0x370 [ 23.759228] vm_area_dup+0x20/0x160 [ 23.759556] __split_vma+0x170/0x950 [ 23.759885] split_vma+0xc6/0x110 [ 23.760193] mprotect_fixup+0x8d2/0xb30 [ 23.760560] do_mprotect_pkey+0x87e/0xd40 [ 23.760930] __x64_sys_mprotect+0x78/0xc0 [ 23.761299] do_syscall_64+0x3f/0x90 [ 23.761641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.762094] [ 23.762247] Freed by task 213: [ 23.762530] kasan_save_stack+0x22/0x50 [ 23.762879] kasan_set_track+0x25/0x30 [ 23.763232] kasan_save_free_info+0x2b/0x50 [ 23.763611] __kasan_slab_free+0x10a/0x190 [ 23.763992] kmem_cache_free+0x10d/0x4d0 [ 23.764352] rcu_core+0x8c8/0x2860 [ 23.764673] __do_softirq+0x1b7/0x7d4 [ 23.765016] [ 23.765168] Last potentially related work creation: [ 23.765584] kasan_save_stack+0x22/0x50 [ 23.765942] __kasan_record_aux_stack+0x8e/0xa0 [ 23.766349] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.766811] remove_vma+0x139/0x170 [ 23.767131] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.767530] do_vmi_munmap+0x1f1/0x2b0 [ 23.767875] __vm_munmap+0x138/0x3a0 [ 23.768208] __x64_sys_munmap+0x59/0x80 [ 23.768564] do_syscall_64+0x3f/0x90 [ 23.768906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.769365] [ 23.769525] The buggy address belongs to the object at ffff88800e379ae0 [ 23.769525] which belongs to the cache vm_area_struct of size 168 [ 23.770578] The buggy address is located 88 bytes inside of [ 23.770578] freed 168-byte region [ffff88800e379ae0, ffff88800e379b88) [ 23.771585] [ 23.771738] The buggy address belongs to the physical page: [ 23.772210] page:00000000e2cf1a4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe379 [ 23.772994] memcg:ffff88800dd6bb01 [ 23.773299] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.773799] page_type: 0xffffffff() [ 23.774118] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b9c0 dead000000000007 [ 23.774775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6bb01 [ 23.775421] page dumped because: kasan: bad access detected [ 23.775895] [ 23.776048] Memory state around the buggy address: [ 23.776461] ffff88800e379a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.777075] ffff88800e379a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.777685] >ffff88800e379b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.778296] ^ [ 23.778730] ffff88800e379b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 23.779343] ffff88800e379c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.779955] ================================================================== [ 23.780677] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.600024] BUG: Bad rss-counter state mm:00000000206e8902 type:MM_FILEPAGES val:33 [ 25.600702] BUG: Bad rss-counter state mm:00000000206e8902 type:MM_ANONPAGES val:22 [ 25.966491] BUG: Bad rss-counter state mm:00000000c59c1b36 type:MM_FILEPAGES val:32 [ 25.967556] BUG: Bad rss-counter state mm:00000000c59c1b36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1504' (ECDSA) to the list of known hosts. 2023/06/20 15:34:09 fuzzer started 2023/06/20 15:34:10 dialing manager at localhost:36067 2023/06/20 15:34:10 checking machine... 2023/06/20 15:34:10 checking revisions... [ 26.589338] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:34:10 testing simple program... [ 26.641859] cgroup: Unknown subsys name 'net' [ 26.726475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d9fa10 RCX=0000000000000005 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888008d9f9b8 RBP=ffff888008d90000 RSP=ffff888008d9f920 R8 =0000000000000006 R9 =0000000000000000 R10=ffff888008d9f978 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d9f9a0 R14=ffff888008d90000 R15=ffff888008d9f978 RIP=ffffffff84513445 RFL=00000206 [-----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 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=00007ffe126d0000 CR3=0000000015e28000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800eb4bf40 RCX=0000000000000000 RDX=ffff888019719b40 RSI=ffffffff81141c44 RDI=0000000000000005 RBP=800000001b31b067 RSP=ffff888016d27b60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=1ffff11002da4f6d R13=800000001b31b065 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff814c089b RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc32fc23900 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=00007fc32fbe8008 CR3=0000000015e28000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000