syzkaller login: [ 48.997201] BUG: Bad rss-counter state mm:000000002021e90b type:MM_FILEPAGES val:33 [ 48.998384] BUG: Bad rss-counter state mm:000000002021e90b type:MM_ANONPAGES val:22 [ 49.036494] ================================================================== [ 49.037520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.038491] Read of size 8 at addr ffff888019eaded8 by task sshd/226 [ 49.039285] [ 49.039537] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.040426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.041450] Call Trace: [ 49.041782] [ 49.042083] dump_stack_lvl+0x91/0xf0 [ 49.042590] print_report+0xcc/0x620 [ 49.043100] ? __virt_addr_valid+0x102/0x340 [ 49.043691] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.044343] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.044995] kasan_report+0xbe/0xf0 [ 49.045494] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.046146] vma_interval_tree_remove+0xc75/0xec0 [ 49.046779] vma_prepare+0xc54/0x11a0 [ 49.047287] __split_vma+0x5af/0x950 [ 49.047799] ? __pfx___split_vma+0x10/0x10 [ 49.048357] ? find_held_lock+0x2c/0x110 [ 49.048906] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.049503] ? lock_is_held_type+0x9f/0x120 [ 49.050078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.050714] ? mtree_range_walk+0x632/0x900 [ 49.051298] ? mas_walk+0x5c7/0x7c0 [ 49.051813] do_vmi_munmap+0x1f1/0x2b0 [ 49.052338] mmap_region+0x1f9/0x2660 [ 49.052846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.053397] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.054158] ? __pfx_lock_acquire+0x10/0x10 [ 49.054722] ? __pfx_mmap_region+0x10/0x10 [ 49.055286] ? security_mmap_addr+0x7d/0xa0 [ 49.055862] ? get_unmapped_area+0x1f5/0x3f0 [ 49.056442] do_mmap+0x854/0xf00 [ 49.056908] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.057431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.058025] ksys_mmap_pgoff+0x3af/0x500 [ 49.058559] do_syscall_64+0x3f/0x90 [ 49.059072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.059767] RIP: 0033:0x7f228d33ed82 [ 49.060249] 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 [ 49.062496] RSP: 002b:00007ffd399a4238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.063626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f228d33ed82 [ 49.064527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f228c778000 [ 49.065430] RBP: 00007f228c778000 R08: 0000000000000009 R09: 0000000000001000 [ 49.066337] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556df1f45980 [ 49.067234] R13: 00007ffd399a4250 R14: 00007ffd399a4280 R15: 00007ffd399a45e0 [ 49.068151] [ 49.068469] [ 49.068696] Allocated by task 219: [ 49.069156] kasan_save_stack+0x22/0x50 [ 49.069692] kasan_set_track+0x25/0x30 [ 49.070214] __kasan_slab_alloc+0x59/0x70 [ 49.070767] kmem_cache_alloc+0x16b/0x370 [ 49.071316] vm_area_dup+0x20/0x160 [ 49.071815] __split_vma+0x170/0x950 [ 49.072308] split_vma+0xc6/0x110 [ 49.072769] mprotect_fixup+0x8d2/0xb30 [ 49.073302] do_mprotect_pkey+0x87e/0xd40 [ 49.073992] __x64_sys_mprotect+0x78/0xc0 [ 49.074549] do_syscall_64+0x3f/0x90 [ 49.075067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.075767] [ 49.076004] Freed by task 219: [ 49.076432] kasan_save_stack+0x22/0x50 [ 49.076978] kasan_set_track+0x25/0x30 [ 49.077507] kasan_save_free_info+0x2b/0x50 [ 49.078076] __kasan_slab_free+0x10a/0x190 [ 49.078641] kmem_cache_free+0x10d/0x4d0 [ 49.079190] rcu_core+0x8c8/0x2860 [ 49.079688] __do_softirq+0x1b7/0x7d4 [ 49.080200] [ 49.080431] Last potentially related work creation: [ 49.081070] kasan_save_stack+0x22/0x50 [ 49.081611] __kasan_record_aux_stack+0x8e/0xa0 [ 49.082225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.082913] remove_vma+0x139/0x170 [ 49.083397] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.084011] do_vmi_munmap+0x1f1/0x2b0 [ 49.084531] __vm_munmap+0x138/0x3a0 [ 49.085084] __x64_sys_munmap+0x59/0x80 [ 49.085604] do_syscall_64+0x3f/0x90 [ 49.086103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.086779] [ 49.087007] The buggy address belongs to the object at ffff888019eade80 [ 49.087007] which belongs to the cache vm_area_struct of size 168 [ 49.088564] The buggy address is located 88 bytes inside of [ 49.088564] freed 168-byte region [ffff888019eade80, ffff888019eadf28) [ 49.090049] [ 49.090277] The buggy address belongs to the physical page: [ 49.090968] page:000000007af3f723 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ead [ 49.092139] memcg:ffff888019ea9201 [ 49.092589] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.093267] page_type: 0xffffffff() [ 49.093755] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.094714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ea9201 [ 49.095676] page dumped because: kasan: bad access detected [ 49.096384] [ 49.096612] Memory state around the buggy address: [ 49.097227] ffff888019eadd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.098127] ffff888019eade00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 49.099033] >ffff888019eade80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.099939] ^ [ 49.100718] ffff888019eadf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 49.101628] ffff888019eadf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.102530] ================================================================== [ 49.103799] Disabling lock debugging due to kernel taint [ 51.639971] BUG: Bad rss-counter state mm:000000008c2b4b28 type:MM_FILEPAGES val:33 [ 51.641186] BUG: Bad rss-counter state mm:000000008c2b4b28 type:MM_ANONPAGES val:22 [ 52.183114] BUG: Bad rss-counter state mm:000000000e96818d type:MM_FILEPAGES val:33 [ 52.184313] BUG: Bad rss-counter state mm:000000000e96818d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10552' (ECDSA) to the list of known hosts. 2023/06/19 14:51:27 fuzzer started 2023/06/19 14:51:27 dialing manager at localhost:44161 2023/06/19 14:51:27 checking machine... 2023/06/19 14:51:27 checking revisions... [ 52.846419] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:51:27 testing simple program... [ 52.902135] cgroup: Unknown subsys name 'net' [ 52.949802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:51:17 Registers: info registers vcpu 0 RAX=ffffffff83642d72 RBX=ffffffff85fa4144 RCX=ffffffff83642d11 RDX=0000000000000000 RSI=ffffffff863b27c4 RDI=ffffffff85fa4124 RBP=ffffffff85fa4124 RSP=ffff888016e27358 R8 =ffffffff863b27c4 R9 =ffff888016e27450 R10=0000000000038001 R11=000000000008ab54 R12=ffffffff85fa4140 R13=ffffffff85fa4124 R14=ffffffff85fa4124 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-APC] 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 00007f0478f00900 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=00007f04794b7618 CR3=000000001a8aa000 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=00007fa6f5fe5018 CR3=0000000013a32000 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=2edeb30a382e3bb1e140d93a9c962b1d XMM02=0000000000120388ec2efd57dc4c00df XMM03=00000000001256e02223ed3d891a7179 XMM04=051e1b468889ce2600000000000ae988 XMM05=e545df062acfd4df00000000001363f8 XMM06=94aac670ef06ff650000000000135820 XMM07=e042d86d42eb936e0000000000126120 XMM08=2223ed3d891a717900000000001203e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000