syzkaller login: [ 45.228396] BUG: Bad rss-counter state mm:00000000adc6d2c4 type:MM_FILEPAGES val:33 [ 45.229080] BUG: Bad rss-counter state mm:00000000adc6d2c4 type:MM_ANONPAGES val:22 [ 45.441400] ================================================================== [ 45.442302] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.443244] Read of size 8 at addr ffff88800e4ccc20 by task sshd/221 [ 45.444126] [ 45.444356] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.445221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.446201] Call Trace: [ 45.446517] [ 45.446802] dump_stack_lvl+0x91/0xf0 [ 45.447287] print_report+0xcc/0x620 [ 45.447772] ? __virt_addr_valid+0x102/0x340 [ 45.448327] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.448941] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.449563] kasan_report+0xbe/0xf0 [ 45.450036] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.450664] vma_interval_tree_remove+0xc75/0xec0 [ 45.451272] vma_prepare+0xc54/0x11a0 [ 45.451753] __split_vma+0x5af/0x950 [ 45.452245] ? __pfx___split_vma+0x10/0x10 [ 45.452773] ? find_held_lock+0x2c/0x110 [ 45.453293] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.453861] ? lock_is_held_type+0x9f/0x120 [ 45.454401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.455012] ? mtree_range_walk+0x632/0x900 [ 45.455562] ? mas_walk+0x5c7/0x7c0 [ 45.456035] do_vmi_munmap+0x1f1/0x2b0 [ 45.456542] mmap_region+0x1f9/0x2660 [ 45.457026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.457536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.458261] ? __pfx_lock_acquire+0x10/0x10 [ 45.458809] ? __pfx_mmap_region+0x10/0x10 [ 45.459334] ? security_mmap_addr+0x7d/0xa0 [ 45.459864] ? get_unmapped_area+0x1f5/0x3f0 [ 45.460429] do_mmap+0x854/0xf00 [ 45.460869] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.461370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.461940] ksys_mmap_pgoff+0x3af/0x500 [ 45.462444] do_syscall_64+0x3f/0x90 [ 45.462920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.463562] RIP: 0033:0x7fe08ec29d82 [ 45.464019] 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 [ 45.466160] RSP: 002b:00007fff09236d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.467063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe08ec29d82 [ 45.467914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe08e063000 [ 45.468768] RBP: 00007fe08e063000 R08: 0000000000000009 R09: 0000000000001000 [ 45.469626] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fc35efb20 [ 45.470476] R13: 00007fff09236d40 R14: 00007fff09236d70 R15: 00007fff092370d0 [ 45.471328] [ 45.471620] [ 45.471833] Allocated by task 212: [ 45.472278] kasan_save_stack+0x22/0x50 [ 45.472785] kasan_set_track+0x25/0x30 [ 45.473277] __kasan_slab_alloc+0x59/0x70 [ 45.473807] kmem_cache_alloc+0x16b/0x370 [ 45.474323] vm_area_dup+0x20/0x160 [ 45.474780] __split_vma+0x170/0x950 [ 45.475246] split_vma+0xc6/0x110 [ 45.475685] mprotect_fixup+0x8d2/0xb30 [ 45.476192] do_mprotect_pkey+0x87e/0xd40 [ 45.476717] __x64_sys_mprotect+0x78/0xc0 [ 45.477235] do_syscall_64+0x3f/0x90 [ 45.477709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.478354] [ 45.478569] Freed by task 212: [ 45.478963] kasan_save_stack+0x22/0x50 [ 45.479471] kasan_set_track+0x25/0x30 [ 45.479968] kasan_save_free_info+0x2b/0x50 [ 45.480523] __kasan_slab_free+0x10a/0x190 [ 45.481057] kmem_cache_free+0x10d/0x4d0 [ 45.481565] rcu_core+0x8c8/0x2860 [ 45.482005] __do_softirq+0x1b7/0x7d4 [ 45.482483] [ 45.482699] Last potentially related work creation: [ 45.483290] kasan_save_stack+0x22/0x50 [ 45.483790] __kasan_record_aux_stack+0x8e/0xa0 [ 45.484375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.485012] remove_vma+0x139/0x170 [ 45.485464] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.486021] do_vmi_munmap+0x1f1/0x2b0 [ 45.486506] __vm_munmap+0x138/0x3a0 [ 45.487021] __x64_sys_munmap+0x59/0x80 [ 45.487576] do_syscall_64+0x3f/0x90 [ 45.488052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.488745] [ 45.488962] Second to last potentially related work creation: [ 45.489655] kasan_save_stack+0x22/0x50 [ 45.490164] __kasan_record_aux_stack+0x8e/0xa0 [ 45.490738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.491393] remove_vma+0x139/0x170 [ 45.491862] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.492444] do_vmi_munmap+0x1f1/0x2b0 [ 45.492931] mmap_region+0x1f9/0x2660 [ 45.493416] do_mmap+0x854/0xf00 [ 45.493848] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.494348] ksys_mmap_pgoff+0x7d/0x500 [ 45.494852] do_syscall_64+0x3f/0x90 [ 45.495346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.496019] [ 45.496249] The buggy address belongs to the object at ffff88800e4ccbc8 [ 45.496249] which belongs to the cache vm_area_struct of size 168 [ 45.497816] The buggy address is located 88 bytes inside of [ 45.497816] freed 168-byte region [ffff88800e4ccbc8, ffff88800e4ccc70) [ 45.499318] [ 45.499551] The buggy address belongs to the physical page: [ 45.500288] page:0000000039d5aeee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4cc [ 45.501458] memcg:ffff88800e5fb301 [ 45.501912] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.502602] page_type: 0xffffffff() [ 45.503083] raw: 0100000000000200 ffff88800879fc80 ffffea00003992c0 dead000000000004 [ 45.504053] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5fb301 [ 45.505046] page dumped because: kasan: bad access detected [ 45.505755] [ 45.505990] Memory state around the buggy address: [ 45.506622] ffff88800e4ccb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.507537] ffff88800e4ccb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 45.508474] >ffff88800e4ccc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 45.509383] ^ [ 45.509940] ffff88800e4ccc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 45.510857] ffff88800e4ccd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 45.511769] ================================================================== [ 45.512882] Disabling lock debugging due to kernel taint [ 47.409812] BUG: Bad rss-counter state mm:000000008fe39360 type:MM_FILEPAGES val:33 [ 47.410970] BUG: Bad rss-counter state mm:000000008fe39360 type:MM_ANONPAGES val:22 [ 47.936499] BUG: Bad rss-counter state mm:00000000f26ca90c type:MM_FILEPAGES val:33 [ 47.937731] BUG: Bad rss-counter state mm:00000000f26ca90c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54919' (ECDSA) to the list of known hosts. 2023/06/19 13:57:31 fuzzer started 2023/06/19 13:57:31 dialing manager at localhost:44161 2023/06/19 13:57:31 checking machine... 2023/06/19 13:57:31 checking revisions... [ 48.575321] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:57:31 testing simple program... [ 48.624147] cgroup: Unknown subsys name 'net' [ 48.710275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:57:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f5c51faf048 CR3=000000000dca4000 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=2031333a37353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37353a3331203931 XMM08=6d65747379733d6a6275732035393237 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888015d67248 RSP=ffff888015d67180 R8 =ffffffff86137542 R9 =ffff888015d67230 R10=0000000000038001 R11=0000000000020d8a R12=ffff888015d67250 R13=ffff888015d67238 R14=0000000000000005 R15=ffff888015d671f0 RIP=ffffffff81130b3f 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 00007f6702b9d900 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=00007ffdbc5f1000 CR3=000000000d30c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000