syzkaller login: [ 35.816121] BUG: Bad rss-counter state mm:000000001a66efea type:MM_FILEPAGES val:33 [ 35.817129] BUG: Bad rss-counter state mm:000000001a66efea type:MM_ANONPAGES val:22 [ 35.991066] ================================================================== [ 35.992029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.993037] Read of size 8 at addr ffff88800e05ddf0 by task sshd/220 [ 35.993968] [ 35.994200] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.995126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.996168] Call Trace: [ 35.996506] [ 35.996821] dump_stack_lvl+0x91/0xf0 [ 35.997341] print_report+0xcc/0x620 [ 35.997865] ? __virt_addr_valid+0x102/0x340 [ 35.998473] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.999125] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.999790] kasan_report+0xbe/0xf0 [ 36.000303] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.000963] vma_interval_tree_remove+0xc75/0xec0 [ 36.001603] vma_prepare+0xc54/0x11a0 [ 36.002141] __split_vma+0x5af/0x950 [ 36.002657] ? __pfx___split_vma+0x10/0x10 [ 36.003232] ? find_held_lock+0x2c/0x110 [ 36.003800] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.004406] ? lock_is_held_type+0x9f/0x120 [ 36.004985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.005630] ? mtree_range_walk+0x632/0x900 [ 36.006253] ? mas_walk+0x5c7/0x7c0 [ 36.006775] do_vmi_munmap+0x1f1/0x2b0 [ 36.007302] mmap_region+0x1f9/0x2660 [ 36.007817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.008366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.009138] ? __pfx_lock_acquire+0x10/0x10 [ 36.009710] ? __pfx_mmap_region+0x10/0x10 [ 36.010290] ? security_mmap_addr+0x7d/0xa0 [ 36.010869] ? get_unmapped_area+0x1f5/0x3f0 [ 36.011464] do_mmap+0x854/0xf00 [ 36.011931] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.012454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.013067] ksys_mmap_pgoff+0x3af/0x500 [ 36.013617] do_syscall_64+0x3f/0x90 [ 36.014164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.014861] RIP: 0033:0x7f9ee92f4d82 [ 36.015353] 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 [ 36.017660] RSP: 002b:00007ffc35db23d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.018661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ee92f4d82 [ 36.019577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ee872e000 [ 36.020501] RBP: 00007f9ee872e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.021428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8ba151ec0 [ 36.022342] R13: 00007ffc35db23f0 R14: 00007ffc35db2420 R15: 00007ffc35db2780 [ 36.023267] [ 36.023584] [ 36.023812] Allocated by task 212: [ 36.024269] kasan_save_stack+0x22/0x50 [ 36.024823] kasan_set_track+0x25/0x30 [ 36.025360] __kasan_slab_alloc+0x59/0x70 [ 36.025922] kmem_cache_alloc+0x16b/0x370 [ 36.026523] vm_area_dup+0x20/0x160 [ 36.027027] __split_vma+0x170/0x950 [ 36.027550] split_vma+0xc6/0x110 [ 36.028048] mprotect_fixup+0x8d2/0xb30 [ 36.028604] do_mprotect_pkey+0x87e/0xd40 [ 36.029182] __x64_sys_mprotect+0x78/0xc0 [ 36.029757] do_syscall_64+0x3f/0x90 [ 36.030294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.031017] [ 36.031260] Freed by task 212: [ 36.031693] kasan_save_stack+0x22/0x50 [ 36.032251] kasan_set_track+0x25/0x30 [ 36.032807] kasan_save_free_info+0x2b/0x50 [ 36.033402] __kasan_slab_free+0x10a/0x190 [ 36.034010] kmem_cache_free+0x10d/0x4d0 [ 36.034570] rcu_core+0x8c8/0x2860 [ 36.035065] __do_softirq+0x1b7/0x7d4 [ 36.035594] [ 36.035839] Last potentially related work creation: [ 36.036483] kasan_save_stack+0x22/0x50 [ 36.037039] __kasan_record_aux_stack+0x8e/0xa0 [ 36.037674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.038405] remove_vma+0x139/0x170 [ 36.038902] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.039528] do_vmi_munmap+0x1f1/0x2b0 [ 36.040064] __vm_munmap+0x138/0x3a0 [ 36.040580] __x64_sys_munmap+0x59/0x80 [ 36.041137] do_syscall_64+0x3f/0x90 [ 36.041660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.042386] [ 36.042619] Second to last potentially related work creation: [ 36.043385] kasan_save_stack+0x22/0x50 [ 36.043941] __kasan_record_aux_stack+0x8e/0xa0 [ 36.044574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.045282] remove_vma+0x139/0x170 [ 36.045779] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.046426] do_vmi_munmap+0x1f1/0x2b0 [ 36.046964] mmap_region+0x1f9/0x2660 [ 36.047493] do_mmap+0x854/0xf00 [ 36.047969] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.048506] ksys_mmap_pgoff+0x3af/0x500 [ 36.049059] do_syscall_64+0x3f/0x90 [ 36.049584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.050299] [ 36.050532] The buggy address belongs to the object at ffff88800e05dd98 [ 36.050532] which belongs to the cache vm_area_struct of size 168 [ 36.052177] The buggy address is located 88 bytes inside of [ 36.052177] freed 168-byte region [ffff88800e05dd98, ffff88800e05de40) [ 36.053728] [ 36.053990] The buggy address belongs to the physical page: [ 36.054719] page:00000000e31c841c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe05d [ 36.055925] memcg:ffff88800def5801 [ 36.056406] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.057119] page_type: 0xffffffff() [ 36.057622] raw: 0100000000000200 ffff8880087a0c80 ffffea00003972c0 dead000000000006 [ 36.058645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800def5801 [ 36.059665] page dumped because: kasan: bad access detected [ 36.060395] [ 36.060632] Memory state around the buggy address: [ 36.061262] ffff88800e05dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.062227] ffff88800e05dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.063184] >ffff88800e05dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.064134] ^ [ 36.065044] ffff88800e05de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.066005] ffff88800e05de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.066958] ================================================================== [ 36.068131] Disabling lock debugging due to kernel taint [ 38.664514] BUG: Bad rss-counter state mm:00000000c4050255 type:MM_FILEPAGES val:33 [ 38.665783] BUG: Bad rss-counter state mm:00000000c4050255 type:MM_ANONPAGES val:22 [ 39.150641] BUG: Bad rss-counter state mm:000000005d18c8c6 type:MM_FILEPAGES val:33 [ 39.152153] BUG: Bad rss-counter state mm:000000005d18c8c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44931' (ECDSA) to the list of known hosts. 2023/06/20 15:01:27 fuzzer started 2023/06/20 15:01:27 dialing manager at localhost:36067 2023/06/20 15:01:27 checking machine... 2023/06/20 15:01:27 checking revisions... [ 39.855108] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:01:27 testing simple program... [ 39.904947] cgroup: Unknown subsys name 'net' [ 39.955336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:01:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000004 RCX=0000000000000000 RDX=ffff888018328000 RSI=0000000000000004 RDI=000000000000000a RBP=0000000000000005 RSP=ffff88800fd077b8 R8 =0000000000000005 R9 =0000000000000082 R10=0000000000000004 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99b00 R14=ffff88800cbd7579 R15=0000000000000006 RIP=ffffffff814c0340 RFL=00000293 [--S-A-C] 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 00007ff683232900 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=00007ff6837e9618 CR3=000000000e820000 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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000008 RSI=ffff88806cf09e60 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a10 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff811303fe 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=00007fb0a67cf790 CR3=000000000f068000 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=2036323a31303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000