syzkaller login: [ 38.800409] BUG: Bad rss-counter state mm:000000001f948d39 type:MM_FILEPAGES val:33 [ 38.801417] BUG: Bad rss-counter state mm:000000001f948d39 type:MM_ANONPAGES val:22 [ 38.968616] ================================================================== [ 38.969540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.970482] Read of size 8 at addr ffff88800e642ed8 by task sshd/218 [ 38.971251] [ 38.971470] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.972492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.973473] Call Trace: [ 38.973797] [ 38.974107] dump_stack_lvl+0x91/0xf0 [ 38.974599] print_report+0xcc/0x620 [ 38.975086] ? __virt_addr_valid+0x102/0x340 [ 38.975636] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976258] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976881] kasan_report+0xbe/0xf0 [ 38.977362] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.977992] vma_interval_tree_remove+0xc75/0xec0 [ 38.978594] vma_prepare+0xc54/0x11a0 [ 38.979068] __split_vma+0x5af/0x950 [ 38.979541] ? __pfx___split_vma+0x10/0x10 [ 38.980066] ? find_held_lock+0x2c/0x110 [ 38.980585] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.981149] ? lock_is_held_type+0x9f/0x120 [ 38.981685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.982311] ? mtree_range_walk+0x632/0x900 [ 38.982867] ? mas_walk+0x5c7/0x7c0 [ 38.983339] do_vmi_munmap+0x1f1/0x2b0 [ 38.983829] mmap_region+0x1f9/0x2660 [ 38.984316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.984821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.985545] ? __pfx_lock_acquire+0x10/0x10 [ 38.986080] ? __pfx_mmap_region+0x10/0x10 [ 38.986610] ? security_mmap_addr+0x7d/0xa0 [ 38.987137] ? get_unmapped_area+0x1f5/0x3f0 [ 38.987688] do_mmap+0x854/0xf00 [ 38.988125] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.988618] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.989177] ksys_mmap_pgoff+0x3af/0x500 [ 38.989679] do_syscall_64+0x3f/0x90 [ 38.990179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990826] RIP: 0033:0x7f96d5888d82 [ 38.991281] 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 [ 38.993389] RSP: 002b:00007ffcba640ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.994311] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96d5888d82 [ 38.995155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96d4cc2000 [ 38.995999] RBP: 00007f96d4cc2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.996843] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e20a2b2ec0 [ 38.997687] R13: 00007ffcba640ec0 R14: 00007ffcba640ef0 R15: 00007ffcba641250 [ 38.998557] [ 38.998852] [ 38.999066] Allocated by task 211: [ 38.999493] kasan_save_stack+0x22/0x50 [ 38.999993] kasan_set_track+0x25/0x30 [ 39.000483] __kasan_slab_alloc+0x59/0x70 [ 39.001007] kmem_cache_alloc+0x16b/0x370 [ 39.001528] vm_area_dup+0x20/0x160 [ 39.001999] __split_vma+0x170/0x950 [ 39.002465] split_vma+0xc6/0x110 [ 39.002903] mprotect_fixup+0x8d2/0xb30 [ 39.003421] do_mprotect_pkey+0x87e/0xd40 [ 39.003955] __x64_sys_mprotect+0x78/0xc0 [ 39.004479] do_syscall_64+0x3f/0x90 [ 39.004957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005626] [ 39.005843] Freed by task 19: [ 39.006240] kasan_save_stack+0x22/0x50 [ 39.006745] kasan_set_track+0x25/0x30 [ 39.007236] kasan_save_free_info+0x2b/0x50 [ 39.007766] __kasan_slab_free+0x10a/0x190 [ 39.008300] kmem_cache_free+0x10d/0x4d0 [ 39.008810] rcu_core+0x8c8/0x2860 [ 39.009257] __do_softirq+0x1b7/0x7d4 [ 39.009732] [ 39.009964] Last potentially related work creation: [ 39.010555] kasan_save_stack+0x22/0x50 [ 39.011057] __kasan_record_aux_stack+0x8e/0xa0 [ 39.011626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.012276] remove_vma+0x139/0x170 [ 39.012724] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.013277] do_vmi_munmap+0x1f1/0x2b0 [ 39.013761] __vm_munmap+0x138/0x3a0 [ 39.014232] __x64_sys_munmap+0x59/0x80 [ 39.014734] do_syscall_64+0x3f/0x90 [ 39.015207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.015848] [ 39.016063] Second to last potentially related work creation: [ 39.016747] kasan_save_stack+0x22/0x50 [ 39.017247] __kasan_record_aux_stack+0x8e/0xa0 [ 39.017829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.018476] remove_vma+0x139/0x170 [ 39.018924] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.019482] do_vmi_munmap+0x1f1/0x2b0 [ 39.019966] mmap_region+0x1f9/0x2660 [ 39.020442] do_mmap+0x854/0xf00 [ 39.020869] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.021353] ksys_mmap_pgoff+0x7d/0x500 [ 39.021845] do_syscall_64+0x3f/0x90 [ 39.022337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.022975] [ 39.023189] The buggy address belongs to the object at ffff88800e642e80 [ 39.023189] which belongs to the cache vm_area_struct of size 168 [ 39.024648] The buggy address is located 88 bytes inside of [ 39.024648] freed 168-byte region [ffff88800e642e80, ffff88800e642f28) [ 39.026050] [ 39.026264] The buggy address belongs to the physical page: [ 39.026937] page:00000000a44dd51f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe642 [ 39.028017] memcg:ffff88800d3ff801 [ 39.028441] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.029137] page_type: 0xffffffff() [ 39.029592] raw: 0100000000000200 ffff8880087a0c80 ffffea0000409500 dead000000000005 [ 39.030525] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3ff801 [ 39.031434] page dumped because: kasan: bad access detected [ 39.032085] [ 39.032300] Memory state around the buggy address: [ 39.032886] ffff88800e642d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.033749] ffff88800e642e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.034643] >ffff88800e642e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.035491] ^ [ 39.036230] ffff88800e642f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.037093] ffff88800e642f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.037967] ================================================================== [ 39.039103] Disabling lock debugging due to kernel taint [ 41.700406] BUG: Bad rss-counter state mm:00000000b58891c0 type:MM_FILEPAGES val:33 [ 41.701368] BUG: Bad rss-counter state mm:00000000b58891c0 type:MM_ANONPAGES val:22 [ 42.241742] BUG: Bad rss-counter state mm:000000006a04ae58 type:MM_FILEPAGES val:33 [ 42.242707] BUG: Bad rss-counter state mm:000000006a04ae58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33365' (ECDSA) to the list of known hosts. 2023/06/20 23:41:16 fuzzer started 2023/06/20 23:41:16 dialing manager at localhost:36067 2023/06/20 23:41:16 checking machine... 2023/06/20 23:41:16 checking revisions... [ 42.954604] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:41:16 testing simple program... [ 42.997843] cgroup: Unknown subsys name 'net' [ 43.041230] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bd87c RDX=1ffff1100d9c135f RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864bd880 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f38 R15=ffff88806ce09a98 RIP=ffffffff811310d4 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=00007ffee732b678 CR3=0000000016d88000 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=2035313a31343a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000002b RCX=ffffffff81f57e33 RDX=ffff88800f299b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800f516800 RSP=ffff88801687fa90 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=0000000000000000 R12=ffff888008dfc0d8 R13=ffff8880093b8180 R14=0000000000000010 R15=dffffc0000000000 RIP=ffffffff81f57e33 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 00007f6bd7490900 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=00007f6bd7a47618 CR3=000000000e2ba000 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=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