syzkaller login: [ 30.875305] BUG: Bad rss-counter state mm:00000000341411d6 type:MM_FILEPAGES val:33 [ 30.876691] BUG: Bad rss-counter state mm:00000000341411d6 type:MM_ANONPAGES val:22 [ 31.039880] ================================================================== [ 31.040998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.042112] Read of size 8 at addr ffff88800e5f05c8 by task sshd/221 [ 31.043203] [ 31.043473] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.044531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.045734] Call Trace: [ 31.046129] [ 31.046482] dump_stack_lvl+0x91/0xf0 [ 31.047068] print_report+0xcc/0x620 [ 31.047558] ? __virt_addr_valid+0x102/0x340 [ 31.048113] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049355] kasan_report+0xbe/0xf0 [ 31.049833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050458] vma_interval_tree_remove+0xc75/0xec0 [ 31.051079] vma_prepare+0xc54/0x11a0 [ 31.051555] __split_vma+0x5af/0x950 [ 31.052035] ? __pfx___split_vma+0x10/0x10 [ 31.052561] ? find_held_lock+0x2c/0x110 [ 31.053082] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.053645] ? lock_is_held_type+0x9f/0x120 [ 31.054193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.054805] ? mtree_range_walk+0x632/0x900 [ 31.055361] ? mas_walk+0x5c7/0x7c0 [ 31.055843] do_vmi_munmap+0x1f1/0x2b0 [ 31.056339] mmap_region+0x1f9/0x2660 [ 31.056817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.057337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.058047] ? __pfx_lock_acquire+0x10/0x10 [ 31.058604] ? __pfx_mmap_region+0x10/0x10 [ 31.059132] ? security_mmap_addr+0x7d/0xa0 [ 31.059673] ? get_unmapped_area+0x1f5/0x3f0 [ 31.060230] do_mmap+0x854/0xf00 [ 31.060675] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.061173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.061748] ksys_mmap_pgoff+0x3af/0x500 [ 31.062266] do_syscall_64+0x3f/0x90 [ 31.062767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063419] RIP: 0033:0x7f6796f15d82 [ 31.063873] 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 [ 31.065993] RSP: 002b:00007ffd10774468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.066921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6796f15d82 [ 31.067765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f679634f000 [ 31.068619] RBP: 00007f679634f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.069475] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561972e4a980 [ 31.070312] R13: 00007ffd10774480 R14: 00007ffd107744b0 R15: 00007ffd10774810 [ 31.071177] [ 31.071469] [ 31.071684] Allocated by task 214: [ 31.072119] kasan_save_stack+0x22/0x50 [ 31.072634] kasan_set_track+0x25/0x30 [ 31.073140] __kasan_slab_alloc+0x59/0x70 [ 31.073672] kmem_cache_alloc+0x16b/0x370 [ 31.074183] vm_area_dup+0x20/0x160 [ 31.074660] __split_vma+0x170/0x950 [ 31.075132] split_vma+0xc6/0x110 [ 31.075569] mprotect_fixup+0x8d2/0xb30 [ 31.076071] do_mprotect_pkey+0x87e/0xd40 [ 31.076600] __x64_sys_mprotect+0x78/0xc0 [ 31.077121] do_syscall_64+0x3f/0x90 [ 31.077617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.078260] [ 31.078473] Freed by task 214: [ 31.078880] kasan_save_stack+0x22/0x50 [ 31.079378] kasan_set_track+0x25/0x30 [ 31.079867] kasan_save_free_info+0x2b/0x50 [ 31.080415] __kasan_slab_free+0x10a/0x190 [ 31.080954] kmem_cache_free+0x10d/0x4d0 [ 31.081466] rcu_core+0x8c8/0x2860 [ 31.081916] __do_softirq+0x1b7/0x7d4 [ 31.082396] [ 31.082622] Last potentially related work creation: [ 31.083215] kasan_save_stack+0x22/0x50 [ 31.083780] __kasan_record_aux_stack+0x8e/0xa0 [ 31.084353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.084999] remove_vma+0x139/0x170 [ 31.085450] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.086006] do_vmi_munmap+0x1f1/0x2b0 [ 31.086490] __vm_munmap+0x138/0x3a0 [ 31.086967] __x64_sys_munmap+0x59/0x80 [ 31.087462] do_syscall_64+0x3f/0x90 [ 31.087937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.088584] [ 31.088798] The buggy address belongs to the object at ffff88800e5f0570 [ 31.088798] which belongs to the cache vm_area_struct of size 168 [ 31.090259] The buggy address is located 88 bytes inside of [ 31.090259] freed 168-byte region [ffff88800e5f0570, ffff88800e5f0618) [ 31.091680] [ 31.091898] The buggy address belongs to the physical page: [ 31.092560] page:000000006feba2ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5f0 [ 31.093637] memcg:ffff88800ef2c301 [ 31.094062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.094707] page_type: 0xffffffff() [ 31.095167] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.096094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef2c301 [ 31.097029] page dumped because: kasan: bad access detected [ 31.097691] [ 31.097908] Memory state around the buggy address: [ 31.098491] ffff88800e5f0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.099384] ffff88800e5f0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.100260] >ffff88800e5f0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.101116] ^ [ 31.101788] ffff88800e5f0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.102670] ffff88800e5f0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.103522] ================================================================== [ 31.104597] Disabling lock debugging due to kernel taint [ 33.190297] BUG: Bad rss-counter state mm:0000000090e27cbc type:MM_FILEPAGES val:33 [ 33.191993] BUG: Bad rss-counter state mm:0000000090e27cbc type:MM_ANONPAGES val:22 [ 33.722672] BUG: Bad rss-counter state mm:000000000026a8e1 type:MM_FILEPAGES val:33 [ 33.724295] BUG: Bad rss-counter state mm:000000000026a8e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24384' (ECDSA) to the list of known hosts. 2023/06/21 04:49:21 fuzzer started 2023/06/21 04:49:22 dialing manager at localhost:36067 2023/06/21 04:49:22 checking machine... 2023/06/21 04:49:22 checking revisions... [ 34.484116] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:49:22 testing simple program... [ 34.526508] cgroup: Unknown subsys name 'net' [ 34.572649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:49:21 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000038 RCX=ffffffff844a5202 RDX=ffff888015a28000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888016919638 RSP=ffff88801b9a7cc0 R8 =0000000000000007 R9 =0000000000000000 R10=00007f615dbacfff R11=0000000000000000 R12=0000000000000007 R13=0000000000000008 R14=00007f615db44000 R15=00007f615dbacfff RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f615d00d900 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=00007f615db61044 CR3=0000000016fc2000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888008e37c28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffffffff8560b640 R13=ffffffff81803bfc R14=ffffffff813782f8 R15=ffff88800db3bd00 RIP=ffffffff8180f173 RFL=00000283 [--S---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 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=00007f0830bfc800 CR3=000000000ee9a000 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=1190dcdedde915b64248e4a93fa7775a XMM02=000000000011a0b8eff9b2d0a8fce9cb XMM03=000000000011a1882c67c8bc2e329bc3 XMM04=4c476eb9e8e35c0100000000000ae988 XMM05=e4cb8bb95a7664b60000000000131808 XMM06=c291bd5c70af25b90000000000131690 XMM07=e042d86d42eb936e0000000000121c50 XMM08=25ba9fa95d5f7279000000000011a188 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000