syzkaller login: [ 39.005819] BUG: Bad rss-counter state mm:000000009ea50215 type:MM_FILEPAGES val:33 [ 39.007088] BUG: Bad rss-counter state mm:000000009ea50215 type:MM_ANONPAGES val:22 [ 39.044702] ================================================================== [ 39.045829] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.046836] Read of size 8 at addr ffff88800e2de310 by task sshd/220 [ 39.047644] [ 39.047869] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.048777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.049805] Call Trace: [ 39.050148] [ 39.050458] dump_stack_lvl+0x91/0xf0 [ 39.050960] print_report+0xcc/0x620 [ 39.051460] ? __virt_addr_valid+0x102/0x340 [ 39.052036] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.052683] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.053322] kasan_report+0xbe/0xf0 [ 39.053813] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.054482] vma_interval_tree_remove+0xc75/0xec0 [ 39.055111] vma_prepare+0xc54/0x11a0 [ 39.055623] __split_vma+0x5af/0x950 [ 39.056117] ? __pfx___split_vma+0x10/0x10 [ 39.056673] ? find_held_lock+0x2c/0x110 [ 39.057217] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.057806] ? lock_is_held_type+0x9f/0x120 [ 39.058383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.059036] ? mtree_range_walk+0x632/0x900 [ 39.059603] ? mas_walk+0x5c7/0x7c0 [ 39.060095] do_vmi_munmap+0x1f1/0x2b0 [ 39.060613] mmap_region+0x1f9/0x2660 [ 39.061120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.061661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.062423] ? __pfx_lock_acquire+0x10/0x10 [ 39.062972] ? __pfx_mmap_region+0x10/0x10 [ 39.063534] ? security_mmap_addr+0x7d/0xa0 [ 39.064092] ? get_unmapped_area+0x1f5/0x3f0 [ 39.064668] do_mmap+0x854/0xf00 [ 39.065128] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.065643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.066250] ksys_mmap_pgoff+0x3af/0x500 [ 39.066789] do_syscall_64+0x3f/0x90 [ 39.067285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.067951] RIP: 0033:0x7f4eb11fed82 [ 39.068423] 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 [ 39.070681] RSP: 002b:00007ffdb6a2d4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.071632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4eb11fed82 [ 39.072730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4eb0638000 [ 39.073631] RBP: 00007f4eb0638000 R08: 0000000000000009 R09: 0000000000001000 [ 39.074565] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560dc6f41ec0 [ 39.075465] R13: 00007ffdb6a2d510 R14: 00007ffdb6a2d540 R15: 00007ffdb6a2d8a0 [ 39.076376] [ 39.076683] [ 39.076907] Allocated by task 213: [ 39.077357] kasan_save_stack+0x22/0x50 [ 39.077885] kasan_set_track+0x25/0x30 [ 39.078407] __kasan_slab_alloc+0x59/0x70 [ 39.078958] kmem_cache_alloc+0x16b/0x370 [ 39.079509] vm_area_dup+0x20/0x160 [ 39.079982] __split_vma+0x170/0x950 [ 39.080473] split_vma+0xc6/0x110 [ 39.080932] mprotect_fixup+0x8d2/0xb30 [ 39.081456] do_mprotect_pkey+0x87e/0xd40 [ 39.082004] __x64_sys_mprotect+0x78/0xc0 [ 39.082561] do_syscall_64+0x3f/0x90 [ 39.083054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.083730] [ 39.083954] Freed by task 213: [ 39.084362] kasan_save_stack+0x22/0x50 [ 39.084893] kasan_set_track+0x25/0x30 [ 39.085408] kasan_save_free_info+0x2b/0x50 [ 39.085960] __kasan_slab_free+0x10a/0x190 [ 39.086520] kmem_cache_free+0x10d/0x4d0 [ 39.087035] rcu_core+0x8c8/0x2860 [ 39.087481] __do_softirq+0x1b7/0x7d4 [ 39.087950] [ 39.088167] Last potentially related work creation: [ 39.088752] kasan_save_stack+0x22/0x50 [ 39.089258] __kasan_record_aux_stack+0x8e/0xa0 [ 39.089834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.090485] remove_vma+0x139/0x170 [ 39.090940] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.091508] do_vmi_munmap+0x1f1/0x2b0 [ 39.091999] __vm_munmap+0x138/0x3a0 [ 39.092465] __x64_sys_munmap+0x59/0x80 [ 39.092960] do_syscall_64+0x3f/0x90 [ 39.093433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.094068] [ 39.094287] Second to last potentially related work creation: [ 39.094981] kasan_save_stack+0x22/0x50 [ 39.095481] __kasan_record_aux_stack+0x8e/0xa0 [ 39.096049] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.096691] remove_vma+0x139/0x170 [ 39.097139] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.097693] do_vmi_munmap+0x1f1/0x2b0 [ 39.098173] mmap_region+0x1f9/0x2660 [ 39.098671] do_mmap+0x854/0xf00 [ 39.099100] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.099588] ksys_mmap_pgoff+0x3af/0x500 [ 39.100081] do_syscall_64+0x3f/0x90 [ 39.100560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.101221] [ 39.101435] The buggy address belongs to the object at ffff88800e2de2b8 [ 39.101435] which belongs to the cache vm_area_struct of size 168 [ 39.102908] The buggy address is located 88 bytes inside of [ 39.102908] freed 168-byte region [ffff88800e2de2b8, ffff88800e2de360) [ 39.104291] [ 39.104505] The buggy address belongs to the physical page: [ 39.105158] page:000000003efa60d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2de [ 39.106238] memcg:ffff88800f9e1b01 [ 39.106662] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.107356] page_type: 0xffffffff() [ 39.107805] raw: 0100000000000200 ffff88800879fc80 ffffea00003fe800 dead000000000003 [ 39.108719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f9e1b01 [ 39.109624] page dumped because: kasan: bad access detected [ 39.110296] [ 39.110511] Memory state around the buggy address: [ 39.111087] ffff88800e2de200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.111943] ffff88800e2de280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.112793] >ffff88800e2de300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.113642] ^ [ 39.114104] ffff88800e2de380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.114963] ffff88800e2de400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.115806] ================================================================== [ 39.116844] Disabling lock debugging due to kernel taint [ 41.923122] BUG: Bad rss-counter state mm:00000000f154b501 type:MM_FILEPAGES val:33 [ 41.924161] BUG: Bad rss-counter state mm:00000000f154b501 type:MM_ANONPAGES val:22 [ 42.400559] BUG: Bad rss-counter state mm:00000000c68637fb type:MM_FILEPAGES val:33 [ 42.402412] BUG: Bad rss-counter state mm:00000000c68637fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31463' (ECDSA) to the list of known hosts. 2023/06/19 22:43:36 fuzzer started 2023/06/19 22:43:37 dialing manager at localhost:44161 2023/06/19 22:43:37 checking machine... 2023/06/19 22:43:37 checking revisions... [ 43.155393] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:43:37 testing simple program... [ 43.194877] cgroup: Unknown subsys name 'net' [ 43.252459] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:43:28 Registers: info registers vcpu 0 RAX=ffffffff8100455c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff36 RSI=ffffffff8100455c RDI=ffff888008d7fa20 RBP=ffff888008d7f9f0 RSP=ffff888008d7f950 R8 =0000000000000001 R9 =ffff888008d7f998 R10=0000000000038001 R11=0000000000009bea R12=ffff888008d7fa20 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800ec35d00 RIP=ffffffff813ad424 RFL=00000286 [--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 0000000000000000 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=00007f8d223570e0 CR3=000000001368a000 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=e35a8b3356062397b6425d36699f2fdf XMM02=000000000011ce48eff9b2d0a8fce9cb XMM03=000000000011cf182c67c8bc2e329bc3 XMM04=333dd3654e2b4bf400000000000ae988 XMM05=19e9129bd510f2350000000000135200 XMM06=217bc827ae6385f00000000000134068 XMM07=e042d86d42eb936e00000000001245a0 XMM08=dced2336f56489cd000000000011cf18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8609f9ba RDX=1ffff110011caf38 RSI=1ffff110011caf36 RDI=ffff888008e579c0 RBP=ffff888008e579b0 RSP=ffff888008e578e8 R8 =ffffffff8609f9be R9 =ffff888008e57998 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e579b8 R13=ffff888008e579a0 R14=ffff888008e57ed0 R15=ffff888008e57958 RIP=ffffffff811310f5 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 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=00007ffd0ad6b000 CR3=000000000e9f4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000