syzkaller login: [ 30.861225] BUG: Bad rss-counter state mm:00000000f55b6c39 type:MM_FILEPAGES val:33 [ 30.862174] BUG: Bad rss-counter state mm:00000000f55b6c39 type:MM_ANONPAGES val:22 [ 30.997830] ================================================================== [ 30.998914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.999994] Read of size 8 at addr ffff88800f623ed8 by task sshd/220 [ 31.000669] [ 31.000859] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.001580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.002397] Call Trace: [ 31.002681] [ 31.002917] dump_stack_lvl+0x91/0xf0 [ 31.003331] print_report+0xcc/0x620 [ 31.003728] ? __virt_addr_valid+0x102/0x340 [ 31.004186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004700] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.005212] kasan_report+0xbe/0xf0 [ 31.005606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006127] vma_interval_tree_remove+0xc75/0xec0 [ 31.006650] vma_prepare+0xc54/0x11a0 [ 31.007052] __split_vma+0x5af/0x950 [ 31.007446] ? __pfx___split_vma+0x10/0x10 [ 31.007889] ? find_held_lock+0x2c/0x110 [ 31.008331] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.008806] ? lock_is_held_type+0x9f/0x120 [ 31.009255] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.009764] ? mtree_range_walk+0x632/0x900 [ 31.010231] ? mas_walk+0x5c7/0x7c0 [ 31.010642] do_vmi_munmap+0x1f1/0x2b0 [ 31.011059] mmap_region+0x1f9/0x2660 [ 31.011463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.011896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.012497] ? __pfx_lock_acquire+0x10/0x10 [ 31.012946] ? __pfx_mmap_region+0x10/0x10 [ 31.013386] ? security_mmap_addr+0x7d/0xa0 [ 31.013833] ? get_unmapped_area+0x1f5/0x3f0 [ 31.014299] do_mmap+0x854/0xf00 [ 31.014676] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.015092] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.015568] ksys_mmap_pgoff+0x3af/0x500 [ 31.015995] do_syscall_64+0x3f/0x90 [ 31.016398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.016944] RIP: 0033:0x7f21dd564d82 [ 31.017330] 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 [ 31.019152] RSP: 002b:00007fff3324b528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.019917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21dd564d82 [ 31.020629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21dc99e000 [ 31.021347] RBP: 00007f21dc99e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.022067] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bafee2ec0 [ 31.022789] R13: 00007fff3324b540 R14: 00007fff3324b570 R15: 00007fff3324b8d0 [ 31.023515] [ 31.023759] [ 31.023940] Allocated by task 213: [ 31.024296] kasan_save_stack+0x22/0x50 [ 31.024717] kasan_set_track+0x25/0x30 [ 31.025129] __kasan_slab_alloc+0x59/0x70 [ 31.025564] kmem_cache_alloc+0x16b/0x370 [ 31.025997] vm_area_dup+0x20/0x160 [ 31.026390] __split_vma+0x170/0x950 [ 31.026785] split_vma+0xc6/0x110 [ 31.027148] mprotect_fixup+0x8d2/0xb30 [ 31.027565] do_mprotect_pkey+0x87e/0xd40 [ 31.028001] __x64_sys_mprotect+0x78/0xc0 [ 31.028434] do_syscall_64+0x3f/0x90 [ 31.028830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029376] [ 31.029557] Freed by task 213: [ 31.029884] kasan_save_stack+0x22/0x50 [ 31.030306] kasan_set_track+0x25/0x30 [ 31.030750] kasan_save_free_info+0x2b/0x50 [ 31.031199] __kasan_slab_free+0x10a/0x190 [ 31.031640] kmem_cache_free+0x10d/0x4d0 [ 31.032069] rcu_core+0x8c8/0x2860 [ 31.032441] __do_softirq+0x1b7/0x7d4 [ 31.032845] [ 31.033022] Last potentially related work creation: [ 31.033515] kasan_save_stack+0x22/0x50 [ 31.033931] __kasan_record_aux_stack+0x8e/0xa0 [ 31.034413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034962] remove_vma+0x139/0x170 [ 31.035342] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035814] do_vmi_munmap+0x1f1/0x2b0 [ 31.036221] __vm_munmap+0x138/0x3a0 [ 31.036623] __x64_sys_munmap+0x59/0x80 [ 31.037041] do_syscall_64+0x3f/0x90 [ 31.037442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037983] [ 31.038158] The buggy address belongs to the object at ffff88800f623e80 [ 31.038158] which belongs to the cache vm_area_struct of size 168 [ 31.039423] The buggy address is located 88 bytes inside of [ 31.039423] freed 168-byte region [ffff88800f623e80, ffff88800f623f28) [ 31.040606] [ 31.040787] The buggy address belongs to the physical page: [ 31.041346] page:0000000071e6ea4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf623 [ 31.042256] memcg:ffff8880096b7f01 [ 31.042623] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.043163] page_type: 0xffffffff() [ 31.043541] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.044317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b7f01 [ 31.045079] page dumped because: kasan: bad access detected [ 31.045633] [ 31.045816] Memory state around the buggy address: [ 31.046306] ffff88800f623d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.047037] ffff88800f623e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.047751] >ffff88800f623e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.048461] ^ [ 31.049066] ffff88800f623f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.049783] ffff88800f623f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.050506] ================================================================== [ 31.051475] Disabling lock debugging due to kernel taint [ 32.911183] BUG: Bad rss-counter state mm:00000000c66336e6 type:MM_FILEPAGES val:33 [ 32.911996] BUG: Bad rss-counter state mm:00000000c66336e6 type:MM_ANONPAGES val:22 [ 33.360352] BUG: Bad rss-counter state mm:00000000d98f7adc type:MM_FILEPAGES val:33 [ 33.361530] BUG: Bad rss-counter state mm:00000000d98f7adc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27384' (ECDSA) to the list of known hosts. 2023/06/21 06:51:41 fuzzer started 2023/06/21 06:51:41 dialing manager at localhost:36067 2023/06/21 06:51:41 checking machine... 2023/06/21 06:51:41 checking revisions... [ 34.064941] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:51:41 testing simple program... [ 34.111347] cgroup: Unknown subsys name 'net' [ 34.184303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:51:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016a97b08 RSP=ffff888016a979f0 R8 =ffffffff86098096 R9 =ffff888016a97af0 R10=0000000000038001 R11=0000000000006097 R12=ffff888016a97b10 R13=ffff888016a97af8 R14=ffff888016a97ab0 R15=ffff888016a97ab0 RIP=ffffffff81131151 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 00007fde9ff08900 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=00007fdea04bf618 CR3=0000000019dd0000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe4a62f6f8 CR3=000000000fce4000 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=2030343a31353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000