syzkaller login: [ 30.897458] BUG: Bad rss-counter state mm:000000008a9e5c96 type:MM_FILEPAGES val:33 [ 30.898290] BUG: Bad rss-counter state mm:000000008a9e5c96 type:MM_ANONPAGES val:22 [ 31.014902] ================================================================== [ 31.015543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.016182] Read of size 8 at addr ffff88800ddf3310 by task sshd/222 [ 31.016707] [ 31.016856] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.017441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.018103] Call Trace: [ 31.018324] [ 31.018513] dump_stack_lvl+0x91/0xf0 [ 31.018838] print_report+0xcc/0x620 [ 31.019169] ? __virt_addr_valid+0x102/0x340 [ 31.019669] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020093] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020507] kasan_report+0xbe/0xf0 [ 31.020826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021247] vma_interval_tree_remove+0xc75/0xec0 [ 31.021655] vma_prepare+0xc54/0x11a0 [ 31.021984] __split_vma+0x5af/0x950 [ 31.022310] ? __pfx___split_vma+0x10/0x10 [ 31.022673] ? find_held_lock+0x2c/0x110 [ 31.023025] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.023404] ? lock_is_held_type+0x9f/0x120 [ 31.023785] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.024190] ? mtree_range_walk+0x632/0x900 [ 31.024563] ? mas_walk+0x5c7/0x7c0 [ 31.024885] do_vmi_munmap+0x1f1/0x2b0 [ 31.025219] mmap_region+0x1f9/0x2660 [ 31.025543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.025888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.026368] ? __pfx_lock_acquire+0x10/0x10 [ 31.026722] ? __pfx_mmap_region+0x10/0x10 [ 31.027080] ? security_mmap_addr+0x7d/0xa0 [ 31.027454] ? get_unmapped_area+0x1f5/0x3f0 [ 31.027826] do_mmap+0x854/0xf00 [ 31.028129] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.028464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.028842] ksys_mmap_pgoff+0x3af/0x500 [ 31.029180] do_syscall_64+0x3f/0x90 [ 31.029512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029951] RIP: 0033:0x7fe280abcd82 [ 31.030258] 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 [ 31.031735] RSP: 002b:00007ffce41dbf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.032349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe280abcd82 [ 31.032915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe27fef6000 [ 31.033490] RBP: 00007fe27fef6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.034067] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fda0f7db20 [ 31.034638] R13: 00007ffce41dbfa0 R14: 00007ffce41dbfd0 R15: 00007ffce41dc330 [ 31.035227] [ 31.035441] [ 31.035593] Allocated by task 215: [ 31.035882] kasan_save_stack+0x22/0x50 [ 31.036226] kasan_set_track+0x25/0x30 [ 31.036560] __kasan_slab_alloc+0x59/0x70 [ 31.036915] kmem_cache_alloc+0x16b/0x370 [ 31.037267] vm_area_dup+0x20/0x160 [ 31.037576] __split_vma+0x170/0x950 [ 31.037890] split_vma+0xc6/0x110 [ 31.038192] mprotect_fixup+0x8d2/0xb30 [ 31.038530] do_mprotect_pkey+0x87e/0xd40 [ 31.038889] __x64_sys_mprotect+0x78/0xc0 [ 31.039246] do_syscall_64+0x3f/0x90 [ 31.039579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.040011] [ 31.040161] Freed by task 215: [ 31.040422] kasan_save_stack+0x22/0x50 [ 31.040763] kasan_set_track+0x25/0x30 [ 31.041096] kasan_save_free_info+0x2b/0x50 [ 31.041451] __kasan_slab_free+0x10a/0x190 [ 31.041810] kmem_cache_free+0x10d/0x4d0 [ 31.042154] rcu_core+0x8c8/0x2860 [ 31.042456] __do_softirq+0x1b7/0x7d4 [ 31.042774] [ 31.042924] Last potentially related work creation: [ 31.043322] kasan_save_stack+0x22/0x50 [ 31.043706] __kasan_record_aux_stack+0x8e/0xa0 [ 31.044095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.044530] remove_vma+0x139/0x170 [ 31.044831] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.045207] do_vmi_munmap+0x1f1/0x2b0 [ 31.045539] __vm_munmap+0x138/0x3a0 [ 31.045869] __x64_sys_munmap+0x59/0x80 [ 31.046211] do_syscall_64+0x3f/0x90 [ 31.046534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046967] [ 31.047111] The buggy address belongs to the object at ffff88800ddf32b8 [ 31.047111] which belongs to the cache vm_area_struct of size 168 [ 31.048133] The buggy address is located 88 bytes inside of [ 31.048133] freed 168-byte region [ffff88800ddf32b8, ffff88800ddf3360) [ 31.049084] [ 31.049231] The buggy address belongs to the physical page: [ 31.049680] page:00000000eb3daa85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf3 [ 31.050429] memcg:ffff8880142b9701 [ 31.050714] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.051171] page_type: 0xffffffff() [ 31.051500] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.052117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142b9701 [ 31.052721] page dumped because: kasan: bad access detected [ 31.053162] [ 31.053304] Memory state around the buggy address: [ 31.053692] ffff88800ddf3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.054266] ffff88800ddf3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.054835] >ffff88800ddf3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.055405] ^ [ 31.055755] ffff88800ddf3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.056328] ffff88800ddf3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.056896] ================================================================== [ 31.057587] Disabling lock debugging due to kernel taint [ 32.817472] BUG: Bad rss-counter state mm:00000000c47f0a98 type:MM_FILEPAGES val:33 [ 32.818193] BUG: Bad rss-counter state mm:00000000c47f0a98 type:MM_ANONPAGES val:22 [ 33.257772] BUG: Bad rss-counter state mm:00000000428614e8 type:MM_FILEPAGES val:33 [ 33.258556] BUG: Bad rss-counter state mm:00000000428614e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31119' (ECDSA) to the list of known hosts. 2023/06/21 09:36:50 fuzzer started 2023/06/21 09:36:50 dialing manager at localhost:36067 2023/06/21 09:36:50 checking machine... 2023/06/21 09:36:50 checking revisions... [ 33.753151] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:36:50 testing simple program... [ 33.784815] cgroup: Unknown subsys name 'net' [ 33.816316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88801a325ec0 RIP=ffffffff813744ba 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 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=00007ffc9d634bc8 CR3=000000000dd4e000 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=2030353a36333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a36333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff84d2ff20 RDI=ffff88800fc7e108 RBP=ffff88800fc7e0f8 RSP=ffff88800b97fc88 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff87f95760 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88800fc7e0e0 RIP=ffffffff812db324 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 00007f4a6e85f900 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=00007f4a6ee170b0 CR3=0000000018f54000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000