syzkaller login: [ 30.833159] BUG: Bad rss-counter state mm:00000000e042e460 type:MM_FILEPAGES val:33 [ 30.834467] BUG: Bad rss-counter state mm:00000000e042e460 type:MM_ANONPAGES val:22 [ 30.999429] ================================================================== [ 31.000314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.001215] Read of size 8 at addr ffff88800eeedd08 by task sshd/221 [ 31.001969] [ 31.002182] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.003040] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.004031] Call Trace: [ 31.004344] [ 31.004614] dump_stack_lvl+0x91/0xf0 [ 31.005079] print_report+0xcc/0x620 [ 31.005535] ? __virt_addr_valid+0x102/0x340 [ 31.006052] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007204] kasan_report+0xbe/0xf0 [ 31.007656] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008245] vma_interval_tree_remove+0xc75/0xec0 [ 31.008811] vma_prepare+0xc54/0x11a0 [ 31.009263] __split_vma+0x5af/0x950 [ 31.009738] ? __pfx___split_vma+0x10/0x10 [ 31.010324] ? find_held_lock+0x2c/0x110 [ 31.010888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.011455] ? lock_is_held_type+0x9f/0x120 [ 31.011987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.012675] ? mtree_range_walk+0x632/0x900 [ 31.013306] ? mas_walk+0x5c7/0x7c0 [ 31.013762] do_vmi_munmap+0x1f1/0x2b0 [ 31.014237] mmap_region+0x1f9/0x2660 [ 31.014709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.015204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.015895] ? __pfx_lock_acquire+0x10/0x10 [ 31.016435] ? __pfx_mmap_region+0x10/0x10 [ 31.016957] ? security_mmap_addr+0x7d/0xa0 [ 31.017477] ? get_unmapped_area+0x1f5/0x3f0 [ 31.018019] do_mmap+0x854/0xf00 [ 31.018449] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.018928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.019488] ksys_mmap_pgoff+0x3af/0x500 [ 31.020093] do_syscall_64+0x3f/0x90 [ 31.020615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.021305] RIP: 0033:0x7f652a2a5d82 [ 31.021785] 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 [ 31.024046] RSP: 002b:00007fff20664438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.024944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f652a2a5d82 [ 31.025770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65296df000 [ 31.026594] RBP: 00007f65296df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.027495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9bde71b20 [ 31.028396] R13: 00007fff20664450 R14: 00007fff20664480 R15: 00007fff206647e0 [ 31.029253] [ 31.029546] [ 31.029760] Allocated by task 214: [ 31.030191] kasan_save_stack+0x22/0x50 [ 31.030696] kasan_set_track+0x25/0x30 [ 31.031188] __kasan_slab_alloc+0x59/0x70 [ 31.031709] kmem_cache_alloc+0x16b/0x370 [ 31.032241] vm_area_dup+0x20/0x160 [ 31.032698] __split_vma+0x170/0x950 [ 31.033163] split_vma+0xc6/0x110 [ 31.033605] mprotect_fixup+0x8d2/0xb30 [ 31.034103] do_mprotect_pkey+0x87e/0xd40 [ 31.034621] __x64_sys_mprotect+0x78/0xc0 [ 31.035143] do_syscall_64+0x3f/0x90 [ 31.035617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036263] [ 31.036479] Freed by task 214: [ 31.036869] kasan_save_stack+0x22/0x50 [ 31.037372] kasan_set_track+0x25/0x30 [ 31.037867] kasan_save_free_info+0x2b/0x50 [ 31.038395] __kasan_slab_free+0x10a/0x190 [ 31.038922] kmem_cache_free+0x10d/0x4d0 [ 31.039426] rcu_core+0x8c8/0x2860 [ 31.039867] __do_softirq+0x1b7/0x7d4 [ 31.040353] [ 31.040569] Last potentially related work creation: [ 31.041154] kasan_save_stack+0x22/0x50 [ 31.041652] __kasan_record_aux_stack+0x8e/0xa0 [ 31.042222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.042862] remove_vma+0x139/0x170 [ 31.043312] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.043870] do_vmi_munmap+0x1f1/0x2b0 [ 31.044414] __vm_munmap+0x138/0x3a0 [ 31.044883] __x64_sys_munmap+0x59/0x80 [ 31.045378] do_syscall_64+0x3f/0x90 [ 31.045849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046493] [ 31.046710] The buggy address belongs to the object at ffff88800eeedcb0 [ 31.046710] which belongs to the cache vm_area_struct of size 168 [ 31.048165] The buggy address is located 88 bytes inside of [ 31.048165] freed 168-byte region [ffff88800eeedcb0, ffff88800eeedd58) [ 31.049574] [ 31.049788] The buggy address belongs to the physical page: [ 31.050450] page:0000000084b234e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeed [ 31.051520] memcg:ffff88800e850501 [ 31.051945] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.052677] page_type: 0xffffffff() [ 31.053132] raw: 0100000000000200 ffff88800879fc80 ffffea00003bb440 dead00000000000b [ 31.054047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e850501 [ 31.054952] page dumped because: kasan: bad access detected [ 31.055617] [ 31.055832] Memory state around the buggy address: [ 31.056421] ffff88800eeedc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.057270] ffff88800eeedc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.058119] >ffff88800eeedd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.058970] ^ [ 31.059413] ffff88800eeedd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.060275] ffff88800eeede00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.061123] ================================================================== [ 31.062216] Disabling lock debugging due to kernel taint [ 33.200137] BUG: Bad rss-counter state mm:000000009b5edfd0 type:MM_FILEPAGES val:33 [ 33.201136] BUG: Bad rss-counter state mm:000000009b5edfd0 type:MM_ANONPAGES val:22 [ 33.702571] BUG: Bad rss-counter state mm:0000000059348e2b type:MM_FILEPAGES val:33 [ 33.704172] BUG: Bad rss-counter state mm:0000000059348e2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49936' (ECDSA) to the list of known hosts. 2023/06/20 06:05:43 fuzzer started 2023/06/20 06:05:44 dialing manager at localhost:44161 2023/06/20 06:05:44 checking machine... 2023/06/20 06:05:44 checking revisions... [ 34.437441] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:05:44 testing simple program... [ 34.481579] cgroup: Unknown subsys name 'net' [ 34.540073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:05:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f453680 RSI=ffffffff8163080d RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888019e078b8 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6996 R12=ffffea00006c3800 R13=1ffff110033c0f18 R14=ffff888019e078e0 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000292 [--S-A--] 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 00007f00d5baf700 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=0000563f8db31290 CR3=0000000014404000 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=2033343a35303a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35303a3630203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000007694f530 RBX=00000000bd319552 RCX=ffff88800da873c8 RDX=0000000000000011 RSI=0000000000000004 RDI=00000000dcd6119e RBP=ffff88800844f780 RSP=ffff88800da872e8 R8 =00000000bd319552 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff88800da87350 R15=0000000000000011 RIP=ffffffff82270ec4 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 00007f2895ed1900 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=00007f469aa9f650 CR3=0000000013ab6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3225e36fafb6b62f00000000000ae988 XMM05=db289bde1be081f80000000000134650 XMM06=2967ae361e535e7800000000001333f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000