syzkaller login: [ 29.261825] BUG: Bad rss-counter state mm:000000001d4a5473 type:MM_FILEPAGES val:33 [ 29.263225] BUG: Bad rss-counter state mm:000000001d4a5473 type:MM_ANONPAGES val:22 [ 29.396641] ================================================================== [ 29.397684] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.398690] Read of size 8 at addr ffff88800e8e1798 by task sshd/219 [ 29.399544] [ 29.399883] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.400696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.401628] Call Trace: [ 29.401947] [ 29.402218] dump_stack_lvl+0x91/0xf0 [ 29.402683] print_report+0xcc/0x620 [ 29.403144] ? __virt_addr_valid+0x102/0x340 [ 29.403674] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.404257] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.404970] kasan_report+0xbe/0xf0 [ 29.405451] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.406155] vma_interval_tree_remove+0xc75/0xec0 [ 29.406767] vma_prepare+0xc54/0x11a0 [ 29.407255] __split_vma+0x5af/0x950 [ 29.407767] ? __pfx___split_vma+0x10/0x10 [ 29.408302] ? find_held_lock+0x2c/0x110 [ 29.408833] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.409404] ? lock_is_held_type+0x9f/0x120 [ 29.409965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.410581] ? mtree_range_walk+0x632/0x900 [ 29.411132] ? mas_walk+0x5c7/0x7c0 [ 29.411608] do_vmi_munmap+0x1f1/0x2b0 [ 29.412101] mmap_region+0x1f9/0x2660 [ 29.412596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.413108] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.413846] ? __pfx_lock_acquire+0x10/0x10 [ 29.414399] ? __pfx_mmap_region+0x10/0x10 [ 29.414927] ? security_mmap_addr+0x7d/0xa0 [ 29.415457] ? get_unmapped_area+0x1f5/0x3f0 [ 29.416005] do_mmap+0x854/0xf00 [ 29.416443] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.416935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.417496] ksys_mmap_pgoff+0x3af/0x500 [ 29.418029] do_syscall_64+0x3f/0x90 [ 29.418516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.419164] RIP: 0033:0x7f723921cd82 [ 29.419623] 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 [ 29.421752] RSP: 002b:00007fff15f35458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.422650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f723921cd82 [ 29.423489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7238656000 [ 29.424330] RBP: 00007f7238656000 R08: 0000000000000009 R09: 0000000000001000 [ 29.425172] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562957352f70 [ 29.426026] R13: 00007fff15f35470 R14: 00007fff15f354a0 R15: 00007fff15f35800 [ 29.426874] [ 29.427168] [ 29.427385] Allocated by task 211: [ 29.427809] kasan_save_stack+0x22/0x50 [ 29.428311] kasan_set_track+0x25/0x30 [ 29.428807] __kasan_slab_alloc+0x59/0x70 [ 29.429329] kmem_cache_alloc+0x16b/0x370 [ 29.429866] vm_area_dup+0x20/0x160 [ 29.430322] __split_vma+0x170/0x950 [ 29.430785] split_vma+0xc6/0x110 [ 29.431223] mprotect_fixup+0x8d2/0xb30 [ 29.431729] do_mprotect_pkey+0x87e/0xd40 [ 29.432246] __x64_sys_mprotect+0x78/0xc0 [ 29.432767] do_syscall_64+0x3f/0x90 [ 29.433238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.433889] [ 29.434105] Freed by task 211: [ 29.434502] kasan_save_stack+0x22/0x50 [ 29.435002] kasan_set_track+0x25/0x30 [ 29.435495] kasan_save_free_info+0x2b/0x50 [ 29.436032] __kasan_slab_free+0x10a/0x190 [ 29.436564] kmem_cache_free+0x10d/0x4d0 [ 29.437152] rcu_core+0x8c8/0x2860 [ 29.437630] __do_softirq+0x1b7/0x7d4 [ 29.438116] [ 29.438334] Last potentially related work creation: [ 29.438929] kasan_save_stack+0x22/0x50 [ 29.439448] __kasan_record_aux_stack+0x8e/0xa0 [ 29.440025] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.440684] remove_vma+0x139/0x170 [ 29.441151] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.441738] do_vmi_munmap+0x1f1/0x2b0 [ 29.442229] __vm_munmap+0x138/0x3a0 [ 29.442694] __x64_sys_munmap+0x59/0x80 [ 29.443203] do_syscall_64+0x3f/0x90 [ 29.443684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.444322] [ 29.444539] The buggy address belongs to the object at ffff88800e8e1740 [ 29.444539] which belongs to the cache vm_area_struct of size 168 [ 29.446058] The buggy address is located 88 bytes inside of [ 29.446058] freed 168-byte region [ffff88800e8e1740, ffff88800e8e17e8) [ 29.447500] [ 29.447715] The buggy address belongs to the physical page: [ 29.448378] page:00000000c5b9e826 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8e1 [ 29.449465] memcg:ffff88800ecadb01 [ 29.449909] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.450619] page_type: 0xffffffff() [ 29.451069] raw: 0100000000000200 ffff88800879fc80 ffffea0000338800 dead000000000005 [ 29.452002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecadb01 [ 29.452923] page dumped because: kasan: bad access detected [ 29.453593] [ 29.453814] Memory state around the buggy address: [ 29.454399] ffff88800e8e1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.455290] ffff88800e8e1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.456168] >ffff88800e8e1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.457031] ^ [ 29.457531] ffff88800e8e1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.458431] ffff88800e8e1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.459292] ================================================================== [ 29.460424] Disabling lock debugging due to kernel taint [ 31.444924] BUG: Bad rss-counter state mm:000000004e812d31 type:MM_FILEPAGES val:33 [ 31.446102] BUG: Bad rss-counter state mm:000000004e812d31 type:MM_ANONPAGES val:22 [ 31.906409] BUG: Bad rss-counter state mm:00000000a8af131b type:MM_FILEPAGES val:33 [ 31.907439] BUG: Bad rss-counter state mm:00000000a8af131b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45512' (ECDSA) to the list of known hosts. 2023/06/19 14:33:06 fuzzer started 2023/06/19 14:33:06 dialing manager at localhost:44161 2023/06/19 14:33:06 checking machine... 2023/06/19 14:33:06 checking revisions... [ 32.543126] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:33:06 testing simple program... [ 32.583270] cgroup: Unknown subsys name 'net' [ 32.630245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8609fb04 RDX=1ffff1100d9c1356 RSI=1ffff1100d9c1355 RDI=1ffff1100d9c1355 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff8609fb08 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09ff8 R15=ffff88806ce09a50 RIP=ffffffff811310d4 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 00007effa10bc900 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=00007effa1673618 CR3=00000000168be000 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=ffff888008c58400 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=00007feb96aae000 CR3=000000000d5f6000 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=f2b6d57a823a0a934149c7f15c19ff0e XMM02=000000000011d950eff9b2d0a8fce9cb XMM03=000000000011da202c67c8bc2e329bc3 XMM04=21f9cdb578a7c03400000000000ae988 XMM05=1a52811f18ba98940000000000135070 XMM06=806171799158d9670000000000134110 XMM07=e042d86d42eb936e0000000000124250 XMM08=aa9231535234a747000000000011da20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000