syzkaller login: [ 34.251967] BUG: Bad rss-counter state mm:000000006fe2f015 type:MM_FILEPAGES val:33 [ 34.253207] BUG: Bad rss-counter state mm:000000006fe2f015 type:MM_ANONPAGES val:22 [ 34.408308] ================================================================== [ 34.409413] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.410547] Read of size 8 at addr ffff88800eccc968 by task sshd/220 [ 34.411656] [ 34.411886] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.412752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.413751] Call Trace: [ 34.414082] [ 34.414373] dump_stack_lvl+0x91/0xf0 [ 34.414891] print_report+0xcc/0x620 [ 34.415383] ? __virt_addr_valid+0x102/0x340 [ 34.415942] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.416560] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.417191] kasan_report+0xbe/0xf0 [ 34.417659] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.418298] vma_interval_tree_remove+0xc75/0xec0 [ 34.418912] vma_prepare+0xc54/0x11a0 [ 34.419389] __split_vma+0x5af/0x950 [ 34.419869] ? __pfx___split_vma+0x10/0x10 [ 34.420397] ? find_held_lock+0x2c/0x110 [ 34.420924] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.421491] ? lock_is_held_type+0x9f/0x120 [ 34.422032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.422653] ? mtree_range_walk+0x632/0x900 [ 34.423207] ? mas_walk+0x5c7/0x7c0 [ 34.423678] do_vmi_munmap+0x1f1/0x2b0 [ 34.424166] mmap_region+0x1f9/0x2660 [ 34.424652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.425160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.425874] ? __pfx_lock_acquire+0x10/0x10 [ 34.426405] ? __pfx_mmap_region+0x10/0x10 [ 34.426948] ? security_mmap_addr+0x7d/0xa0 [ 34.427483] ? get_unmapped_area+0x1f5/0x3f0 [ 34.428037] do_mmap+0x854/0xf00 [ 34.428482] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.428992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.429550] ksys_mmap_pgoff+0x3af/0x500 [ 34.430051] do_syscall_64+0x3f/0x90 [ 34.430526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.431193] RIP: 0033:0x7fc8dd5c6d82 [ 34.431661] 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 [ 34.433805] RSP: 002b:00007ffe7f4e34c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.434735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8dd5c6d82 [ 34.435587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8dca00000 [ 34.436446] RBP: 00007fc8dca00000 R08: 0000000000000009 R09: 0000000000001000 [ 34.437287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562873c11ec0 [ 34.438136] R13: 00007ffe7f4e34e0 R14: 00007ffe7f4e3510 R15: 00007ffe7f4e3870 [ 34.439003] [ 34.439298] [ 34.439514] Allocated by task 213: [ 34.439943] kasan_save_stack+0x22/0x50 [ 34.440452] kasan_set_track+0x25/0x30 [ 34.440943] __kasan_slab_alloc+0x59/0x70 [ 34.441466] kmem_cache_alloc+0x16b/0x370 [ 34.441987] vm_area_dup+0x20/0x160 [ 34.442442] __split_vma+0x170/0x950 [ 34.442932] split_vma+0xc6/0x110 [ 34.443376] mprotect_fixup+0x8d2/0xb30 [ 34.443878] do_mprotect_pkey+0x87e/0xd40 [ 34.444399] __x64_sys_mprotect+0x78/0xc0 [ 34.444917] do_syscall_64+0x3f/0x90 [ 34.445388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.446028] [ 34.446243] Freed by task 213: [ 34.446647] kasan_save_stack+0x22/0x50 [ 34.447151] kasan_set_track+0x25/0x30 [ 34.447642] kasan_save_free_info+0x2b/0x50 [ 34.448176] __kasan_slab_free+0x10a/0x190 [ 34.448707] kmem_cache_free+0x10d/0x4d0 [ 34.449216] rcu_core+0x8c8/0x2860 [ 34.449663] __do_softirq+0x1b7/0x7d4 [ 34.450138] [ 34.450356] Last potentially related work creation: [ 34.450958] kasan_save_stack+0x22/0x50 [ 34.451459] __kasan_record_aux_stack+0x8e/0xa0 [ 34.452040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.452698] remove_vma+0x139/0x170 [ 34.453150] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.453704] do_vmi_munmap+0x1f1/0x2b0 [ 34.454193] __vm_munmap+0x138/0x3a0 [ 34.454666] __x64_sys_munmap+0x59/0x80 [ 34.455174] do_syscall_64+0x3f/0x90 [ 34.455646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.456279] [ 34.456493] Second to last potentially related work creation: [ 34.457184] kasan_save_stack+0x22/0x50 [ 34.457682] __kasan_record_aux_stack+0x8e/0xa0 [ 34.458260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.458916] remove_vma+0x139/0x170 [ 34.459363] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.459924] do_vmi_munmap+0x1f1/0x2b0 [ 34.460421] mmap_region+0x1f9/0x2660 [ 34.460905] do_mmap+0x854/0xf00 [ 34.461344] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.461837] ksys_mmap_pgoff+0x3af/0x500 [ 34.462351] do_syscall_64+0x3f/0x90 [ 34.462841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.463488] [ 34.463703] The buggy address belongs to the object at ffff88800eccc910 [ 34.463703] which belongs to the cache vm_area_struct of size 168 [ 34.465169] The buggy address is located 88 bytes inside of [ 34.465169] freed 168-byte region [ffff88800eccc910, ffff88800eccc9b8) [ 34.466577] [ 34.466805] The buggy address belongs to the physical page: [ 34.467474] page:000000001321a43e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeccc [ 34.468636] memcg:ffff88800e5f3a01 [ 34.469095] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.469791] page_type: 0xffffffff() [ 34.470269] raw: 0100000000000200 ffff88800879fc80 ffffea0000666dc0 0000000000000002 [ 34.471273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f3a01 [ 34.472240] page dumped because: kasan: bad access detected [ 34.472957] [ 34.473179] Memory state around the buggy address: [ 34.473797] ffff88800eccc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.474716] ffff88800eccc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.475638] >ffff88800eccc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.476558] ^ [ 34.477404] ffff88800eccc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.478331] ffff88800eccca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.479276] ================================================================== [ 34.480264] Disabling lock debugging due to kernel taint [ 36.247135] BUG: Bad rss-counter state mm:000000002c12e38d type:MM_FILEPAGES val:33 [ 36.248217] BUG: Bad rss-counter state mm:000000002c12e38d type:MM_ANONPAGES val:22 [ 36.679741] BUG: Bad rss-counter state mm:000000009661c1df type:MM_FILEPAGES val:33 [ 36.681362] BUG: Bad rss-counter state mm:000000009661c1df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64363' (ECDSA) to the list of known hosts. 2023/06/19 20:02:25 fuzzer started 2023/06/19 20:02:26 dialing manager at localhost:44161 2023/06/19 20:02:26 checking machine... 2023/06/19 20:02:26 checking revisions... [ 37.418019] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:02:26 testing simple program... [ 37.464192] cgroup: Unknown subsys name 'net' [ 37.528620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:02:22 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff8880147479d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff81808308 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8180f006 RFL=00000086 [--S--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 00007f277dbda900 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=00007f277e191618 CR3=000000000c5f0000 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=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=00007fa0a49d1ed0 CR3=000000000d8c8000 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=8fe027372cc1719f034896057047a3bf XMM02=2c67c8bc2e329bc3000000000011d008 XMM03=fb795ef6d65770560000000000124130 XMM04=0642bac41dedcb9600000000000ae988 XMM05=19e9129bd510f2350000000000135028 XMM06=9dd20a681f1a34e80000000000133e90 XMM07=e042d86d42eb936e00000000001243b0 XMM08=c709cf4baaa9d563000000000011d068 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000