syzkaller login: [ 30.929147] BUG: Bad rss-counter state mm:000000006c35d011 type:MM_FILEPAGES val:33 [ 30.930674] BUG: Bad rss-counter state mm:000000006c35d011 type:MM_ANONPAGES val:22 [ 31.046778] ================================================================== [ 31.047938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.049093] Read of size 8 at addr ffff8880168cd6b0 by task sshd/221 [ 31.049689] [ 31.049861] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.050530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.051295] Call Trace: [ 31.051542] [ 31.051768] dump_stack_lvl+0x91/0xf0 [ 31.052156] print_report+0xcc/0x620 [ 31.052528] ? __virt_addr_valid+0x102/0x340 [ 31.052955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053912] kasan_report+0xbe/0xf0 [ 31.054279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054765] vma_interval_tree_remove+0xc75/0xec0 [ 31.055233] vma_prepare+0xc54/0x11a0 [ 31.055611] __split_vma+0x5af/0x950 [ 31.055986] ? __pfx___split_vma+0x10/0x10 [ 31.056402] ? find_held_lock+0x2c/0x110 [ 31.056811] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.057251] ? lock_is_held_type+0x9f/0x120 [ 31.057670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.058140] ? mtree_range_walk+0x632/0x900 [ 31.058564] ? mas_walk+0x5c7/0x7c0 [ 31.058932] do_vmi_munmap+0x1f1/0x2b0 [ 31.059315] mmap_region+0x1f9/0x2660 [ 31.059692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.060108] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.060668] ? __pfx_lock_acquire+0x10/0x10 [ 31.061063] ? __pfx_mmap_region+0x10/0x10 [ 31.061378] ? security_mmap_addr+0x7d/0xa0 [ 31.061699] ? get_unmapped_area+0x1f5/0x3f0 [ 31.062027] do_mmap+0x854/0xf00 [ 31.062280] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.062570] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.062891] ksys_mmap_pgoff+0x3af/0x500 [ 31.063189] do_syscall_64+0x3f/0x90 [ 31.063471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063862] RIP: 0033:0x7f364ef99d82 [ 31.064126] 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 [ 31.065411] RSP: 002b:00007fff8ac1db48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.065956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f364ef99d82 [ 31.066475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f364e3d3000 [ 31.066975] RBP: 00007f364e3d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.067484] R10: 0000000000000812 R11: 0000000000000206 R12: 000056450845c980 [ 31.067990] R13: 00007fff8ac1db60 R14: 00007fff8ac1db90 R15: 00007fff8ac1def0 [ 31.068499] [ 31.068677] [ 31.068800] Allocated by task 214: [ 31.069049] kasan_save_stack+0x22/0x50 [ 31.069358] kasan_set_track+0x25/0x30 [ 31.069638] __kasan_slab_alloc+0x59/0x70 [ 31.069950] kmem_cache_alloc+0x16b/0x370 [ 31.070262] vm_area_dup+0x20/0x160 [ 31.070527] __split_vma+0x170/0x950 [ 31.070807] split_vma+0xc6/0x110 [ 31.071069] mprotect_fixup+0x8d2/0xb30 [ 31.071370] do_mprotect_pkey+0x87e/0xd40 [ 31.071681] __x64_sys_mprotect+0x78/0xc0 [ 31.071999] do_syscall_64+0x3f/0x90 [ 31.072277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072664] [ 31.072789] Freed by task 214: [ 31.073019] kasan_save_stack+0x22/0x50 [ 31.073324] kasan_set_track+0x25/0x30 [ 31.073629] kasan_save_free_info+0x2b/0x50 [ 31.073960] __kasan_slab_free+0x10a/0x190 [ 31.074252] kmem_cache_free+0x10d/0x4d0 [ 31.074537] rcu_core+0x8c8/0x2860 [ 31.074785] __do_softirq+0x1b7/0x7d4 [ 31.075046] [ 31.075167] Last potentially related work creation: [ 31.075488] kasan_save_stack+0x22/0x50 [ 31.075766] __kasan_record_aux_stack+0x8e/0xa0 [ 31.076090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.076464] remove_vma+0x139/0x170 [ 31.076726] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.077065] do_vmi_munmap+0x1f1/0x2b0 [ 31.077349] __vm_munmap+0x138/0x3a0 [ 31.077629] __x64_sys_munmap+0x59/0x80 [ 31.077894] do_syscall_64+0x3f/0x90 [ 31.078185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078571] [ 31.078696] Second to last potentially related work creation: [ 31.079080] kasan_save_stack+0x22/0x50 [ 31.079370] __kasan_record_aux_stack+0x8e/0xa0 [ 31.079703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.080090] remove_vma+0x139/0x170 [ 31.080357] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080685] do_vmi_munmap+0x1f1/0x2b0 [ 31.080973] mmap_region+0x1f9/0x2660 [ 31.081256] do_mmap+0x854/0xf00 [ 31.081509] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081788] ksys_mmap_pgoff+0x3af/0x500 [ 31.082071] do_syscall_64+0x3f/0x90 [ 31.082352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082730] [ 31.082859] The buggy address belongs to the object at ffff8880168cd658 [ 31.082859] which belongs to the cache vm_area_struct of size 168 [ 31.083729] The buggy address is located 88 bytes inside of [ 31.083729] freed 168-byte region [ffff8880168cd658, ffff8880168cd700) [ 31.084565] [ 31.084694] The buggy address belongs to the physical page: [ 31.085095] page:0000000019b4938b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168cd [ 31.085748] memcg:ffff888018e85b01 [ 31.086003] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.086395] page_type: 0xffffffff() [ 31.086661] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.087211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e85b01 [ 31.087754] page dumped because: kasan: bad access detected [ 31.088142] [ 31.088264] Memory state around the buggy address: [ 31.088607] ffff8880168cd580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.089107] ffff8880168cd600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.089612] >ffff8880168cd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.090119] ^ [ 31.090459] ffff8880168cd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.090974] ffff8880168cd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.091488] ================================================================== [ 31.092175] Disabling lock debugging due to kernel taint [ 33.134856] BUG: Bad rss-counter state mm:00000000ec73e182 type:MM_FILEPAGES val:33 [ 33.135843] BUG: Bad rss-counter state mm:00000000ec73e182 type:MM_ANONPAGES val:22 [ 33.689799] BUG: Bad rss-counter state mm:000000001f5bae0c type:MM_FILEPAGES val:33 [ 33.690957] BUG: Bad rss-counter state mm:000000001f5bae0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18611' (ECDSA) to the list of known hosts. 2023/06/19 21:35:58 fuzzer started 2023/06/19 21:35:58 dialing manager at localhost:44161 2023/06/19 21:35:58 checking machine... 2023/06/19 21:35:58 checking revisions... [ 34.352553] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:35:58 testing simple program... [ 34.396404] cgroup: Unknown subsys name 'net' [ 34.440687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:35:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=000000000202000a RDX=0000000000000010 RSI=0000559ebe7d0d80 RDI=00007ffc628f2e70 RBP=00007ffc628f32b0 RSP=00007ffc628f2cf0 R8 =0000559ebe7d0d50 R9 =0000000000000000 R10=0000000000000000 R11=00007fd4951963c0 R12=0000559ebe7d0d50 R13=0000000000000000 R14=0000559ebe7e53d0 R15=00007ffc628f2e70 RIP=00007fd49510c24a RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd494c30900 00000000 00000000 GS =0000 0000000000000000 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=00007fd4951e7618 CR3=000000000c7c8000 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=563412feff00545000000000000080fe 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=00007f5baa6dc210 CR3=000000000d89e000 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=34d6be4a24a312910d4b27191e86b61d XMM02=000000000011d4e8eff9b2d0a8fce9cb XMM03=000000000011d5b82c67c8bc2e329bc3 XMM04=23b36262cabdc3a000000000000ae988 XMM05=e4cb8bb95a7664b60000000000135560 XMM06=c1ec29a9aca2cad900000000001343c8 XMM07=e042d86d42eb936e00000000001249a0 XMM08=551b8e4f581cb6f3000000000011d5b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000