syzkaller login: [ 36.245476] BUG: Bad rss-counter state mm:0000000067de7ea8 type:MM_FILEPAGES val:33 [ 36.246477] BUG: Bad rss-counter state mm:0000000067de7ea8 type:MM_ANONPAGES val:22 [ 36.415491] ================================================================== [ 36.416605] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.417786] Read of size 8 at addr ffff88800d9424e0 by task sshd/220 [ 36.418875] [ 36.419106] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.420031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.421101] Call Trace: [ 36.421438] [ 36.421742] dump_stack_lvl+0x91/0xf0 [ 36.422266] print_report+0xcc/0x620 [ 36.422780] ? __virt_addr_valid+0x102/0x340 [ 36.423369] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.424027] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.424694] kasan_report+0xbe/0xf0 [ 36.425216] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.425901] vma_interval_tree_remove+0xc75/0xec0 [ 36.426567] vma_prepare+0xc54/0x11a0 [ 36.427097] __split_vma+0x5af/0x950 [ 36.427616] ? __pfx___split_vma+0x10/0x10 [ 36.428197] ? find_held_lock+0x2c/0x110 [ 36.428797] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.429412] ? lock_is_held_type+0x9f/0x120 [ 36.430002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.430745] ? mtree_range_walk+0x632/0x900 [ 36.431357] ? mas_walk+0x5c7/0x7c0 [ 36.431878] do_vmi_munmap+0x1f1/0x2b0 [ 36.432432] mmap_region+0x1f9/0x2660 [ 36.432969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.433537] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.434318] ? __pfx_lock_acquire+0x10/0x10 [ 36.434903] ? __pfx_mmap_region+0x10/0x10 [ 36.435491] ? security_mmap_addr+0x7d/0xa0 [ 36.436074] ? get_unmapped_area+0x1f5/0x3f0 [ 36.436682] do_mmap+0x854/0xf00 [ 36.437168] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.437710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.438327] ksys_mmap_pgoff+0x3af/0x500 [ 36.438884] do_syscall_64+0x3f/0x90 [ 36.439411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.440123] RIP: 0033:0x7f6527c58d82 [ 36.440641] 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 [ 36.442990] RSP: 002b:00007ffe9eb3a958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.443995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6527c58d82 [ 36.445140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6527092000 [ 36.446275] RBP: 00007f6527092000 R08: 0000000000000009 R09: 0000000000001000 [ 36.447364] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555de7be8b20 [ 36.448502] R13: 00007ffe9eb3a970 R14: 00007ffe9eb3a9a0 R15: 00007ffe9eb3ad00 [ 36.449624] [ 36.449988] [ 36.450261] Allocated by task 213: [ 36.450830] kasan_save_stack+0x22/0x50 [ 36.451508] kasan_set_track+0x25/0x30 [ 36.452168] __kasan_slab_alloc+0x59/0x70 [ 36.452855] kmem_cache_alloc+0x16b/0x370 [ 36.453522] vm_area_dup+0x20/0x160 [ 36.454103] __split_vma+0x170/0x950 [ 36.454712] split_vma+0xc6/0x110 [ 36.455266] mprotect_fixup+0x8d2/0xb30 [ 36.455921] do_mprotect_pkey+0x87e/0xd40 [ 36.456603] __x64_sys_mprotect+0x78/0xc0 [ 36.457288] do_syscall_64+0x3f/0x90 [ 36.457905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.458742] [ 36.459019] Freed by task 203: [ 36.459615] kasan_save_stack+0x22/0x50 [ 36.460214] kasan_set_track+0x25/0x30 [ 36.460749] kasan_save_free_info+0x2b/0x50 [ 36.461313] __kasan_slab_free+0x10a/0x190 [ 36.461881] kmem_cache_free+0x10d/0x4d0 [ 36.462424] rcu_core+0x8c8/0x2860 [ 36.462893] __do_softirq+0x1b7/0x7d4 [ 36.463400] [ 36.463630] Last potentially related work creation: [ 36.464249] kasan_save_stack+0x22/0x50 [ 36.464779] __kasan_record_aux_stack+0x8e/0xa0 [ 36.465390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.466093] remove_vma+0x139/0x170 [ 36.466568] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.467164] do_vmi_munmap+0x1f1/0x2b0 [ 36.467673] __vm_munmap+0x138/0x3a0 [ 36.468165] __x64_sys_munmap+0x59/0x80 [ 36.468716] do_syscall_64+0x3f/0x90 [ 36.469217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.469903] [ 36.470134] The buggy address belongs to the object at ffff88800d942488 [ 36.470134] which belongs to the cache vm_area_struct of size 168 [ 36.471709] The buggy address is located 88 bytes inside of [ 36.471709] freed 168-byte region [ffff88800d942488, ffff88800d942530) [ 36.473206] [ 36.473434] The buggy address belongs to the physical page: [ 36.474146] page:000000009bf6b30d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd942 [ 36.475297] memcg:ffff88800e2a7201 [ 36.475748] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.476442] page_type: 0xffffffff() [ 36.476918] raw: 0100000000000200 ffff88800879fc80 ffffea000037ea80 dead000000000006 [ 36.477902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2a7201 [ 36.478860] page dumped because: kasan: bad access detected [ 36.479586] [ 36.479811] Memory state around the buggy address: [ 36.480448] ffff88800d942380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.481366] ffff88800d942400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.482286] >ffff88800d942480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.483190] ^ [ 36.483996] ffff88800d942500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.484920] ffff88800d942580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.485832] ================================================================== [ 36.486970] Disabling lock debugging due to kernel taint [ 38.805562] BUG: Bad rss-counter state mm:00000000e516f003 type:MM_FILEPAGES val:33 [ 38.806280] BUG: Bad rss-counter state mm:00000000e516f003 type:MM_ANONPAGES val:22 [ 39.281947] BUG: Bad rss-counter state mm:00000000e163261e type:MM_FILEPAGES val:33 [ 39.282994] BUG: Bad rss-counter state mm:00000000e163261e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64078' (ECDSA) to the list of known hosts. 2023/06/19 18:39:01 fuzzer started 2023/06/19 18:39:01 dialing manager at localhost:44161 2023/06/19 18:39:02 checking machine... 2023/06/19 18:39:02 checking revisions... [ 39.949430] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:39:02 testing simple program... [ 39.992040] cgroup: Unknown subsys name 'net' [ 40.028532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=ffff888016dd9b40 RSI=ffffffff814c83e7 RDI=ffffffff856529e0 RBP=00007f1893552477 RSP=ffff888015a9f920 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f1893552477 R13=0000000000000000 R14=ffff888016dd9b40 R15=ffff88800e90f000 RIP=ffffffff8135bcff 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 00007f189305f900 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=00007f1893616618 CR3=000000000cb0c000 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=0000000000000030 RBX=0000000000000001 RCX=ffffffff8612043e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016de7368 RSP=ffff888016de72a0 R8 =ffffffff86120442 R9 =ffff888016de7350 R10=0000000000038001 R11=000000000001d00c R12=ffff888016de7370 R13=ffff888016de7358 R14=ffff888016de7698 R15=ffff888016de7310 RIP=ffffffff81130bba 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8f9446a900 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=00007f8f938b1d50 CR3=000000000ce04000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b672b5790562159100000000000ae988 XMM05=296edc360ba8557a0000000000134668 XMM06=0724df58bf7bb7cd0000000000133408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000