syzkaller login: [ 38.826805] BUG: Bad rss-counter state mm:00000000b7d4ac7c type:MM_FILEPAGES val:33 [ 38.828206] BUG: Bad rss-counter state mm:00000000b7d4ac7c type:MM_ANONPAGES val:22 [ 38.990962] ================================================================== [ 38.991871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.992828] Read of size 8 at addr ffff88800e2a1df0 by task sshd/218 [ 38.993731] [ 38.993991] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.994857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.995837] Call Trace: [ 38.996177] [ 38.996465] dump_stack_lvl+0x91/0xf0 [ 38.996964] print_report+0xcc/0x620 [ 38.997452] ? __virt_addr_valid+0x102/0x340 [ 38.998007] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.998651] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999272] kasan_report+0xbe/0xf0 [ 38.999752] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.000380] vma_interval_tree_remove+0xc75/0xec0 [ 39.000993] vma_prepare+0xc54/0x11a0 [ 39.001479] __split_vma+0x5af/0x950 [ 39.001954] ? __pfx___split_vma+0x10/0x10 [ 39.002500] ? find_held_lock+0x2c/0x110 [ 39.003026] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.003605] ? lock_is_held_type+0x9f/0x120 [ 39.004157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.004766] ? mtree_range_walk+0x632/0x900 [ 39.005330] ? mas_walk+0x5c7/0x7c0 [ 39.005811] do_vmi_munmap+0x1f1/0x2b0 [ 39.006310] mmap_region+0x1f9/0x2660 [ 39.006803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.007318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.008042] ? __pfx_lock_acquire+0x10/0x10 [ 39.008582] ? __pfx_mmap_region+0x10/0x10 [ 39.009141] ? security_mmap_addr+0x7d/0xa0 [ 39.009686] ? get_unmapped_area+0x1f5/0x3f0 [ 39.010250] do_mmap+0x854/0xf00 [ 39.010728] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.011225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.011796] ksys_mmap_pgoff+0x3af/0x500 [ 39.012314] do_syscall_64+0x3f/0x90 [ 39.012799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.013461] RIP: 0033:0x7fd53f80ed82 [ 39.013931] 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 [ 39.016087] RSP: 002b:00007ffeb5036738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.017002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd53f80ed82 [ 39.017858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd53ec48000 [ 39.018717] RBP: 00007fd53ec48000 R08: 0000000000000009 R09: 0000000000001000 [ 39.019578] R10: 0000000000000812 R11: 0000000000000206 R12: 000055685260aec0 [ 39.020437] R13: 00007ffeb5036750 R14: 00007ffeb5036780 R15: 00007ffeb5036ae0 [ 39.021313] [ 39.021606] [ 39.021826] Allocated by task 211: [ 39.022258] kasan_save_stack+0x22/0x50 [ 39.022786] kasan_set_track+0x25/0x30 [ 39.023285] __kasan_slab_alloc+0x59/0x70 [ 39.023816] kmem_cache_alloc+0x16b/0x370 [ 39.024336] vm_area_dup+0x20/0x160 [ 39.024806] __split_vma+0x170/0x950 [ 39.025278] split_vma+0xc6/0x110 [ 39.025722] mprotect_fixup+0x8d2/0xb30 [ 39.026236] do_mprotect_pkey+0x87e/0xd40 [ 39.026779] __x64_sys_mprotect+0x78/0xc0 [ 39.027299] do_syscall_64+0x3f/0x90 [ 39.027782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.028425] [ 39.028642] Freed by task 211: [ 39.029043] kasan_save_stack+0x22/0x50 [ 39.029548] kasan_set_track+0x25/0x30 [ 39.030043] kasan_save_free_info+0x2b/0x50 [ 39.030600] __kasan_slab_free+0x10a/0x190 [ 39.031143] kmem_cache_free+0x10d/0x4d0 [ 39.031651] rcu_core+0x8c8/0x2860 [ 39.032155] __do_softirq+0x1b7/0x7d4 [ 39.032650] [ 39.032864] Last potentially related work creation: [ 39.033454] kasan_save_stack+0x22/0x50 [ 39.033966] __kasan_record_aux_stack+0x8e/0xa0 [ 39.034556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.035213] remove_vma+0x139/0x170 [ 39.035668] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.036231] do_vmi_munmap+0x1f1/0x2b0 [ 39.036721] __vm_munmap+0x138/0x3a0 [ 39.037198] __x64_sys_munmap+0x59/0x80 [ 39.037698] do_syscall_64+0x3f/0x90 [ 39.038176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038843] [ 39.039065] Second to last potentially related work creation: [ 39.039771] kasan_save_stack+0x22/0x50 [ 39.040280] __kasan_record_aux_stack+0x8e/0xa0 [ 39.040867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.041524] remove_vma+0x139/0x170 [ 39.041980] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.042571] do_vmi_munmap+0x1f1/0x2b0 [ 39.043072] mmap_region+0x1f9/0x2660 [ 39.043561] do_mmap+0x854/0xf00 [ 39.044010] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.044516] ksys_mmap_pgoff+0x7d/0x500 [ 39.045028] do_syscall_64+0x3f/0x90 [ 39.045518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.046185] [ 39.046414] The buggy address belongs to the object at ffff88800e2a1d98 [ 39.046414] which belongs to the cache vm_area_struct of size 168 [ 39.047925] The buggy address is located 88 bytes inside of [ 39.047925] freed 168-byte region [ffff88800e2a1d98, ffff88800e2a1e40) [ 39.049376] [ 39.049597] The buggy address belongs to the physical page: [ 39.050274] page:00000000a0d7313f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a1 [ 39.051382] memcg:ffff88800e068101 [ 39.051816] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.052521] page_type: 0xffffffff() [ 39.052978] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.053898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e068101 [ 39.054826] page dumped because: kasan: bad access detected [ 39.055497] [ 39.055717] Memory state around the buggy address: [ 39.056311] ffff88800e2a1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.057184] ffff88800e2a1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.058064] >ffff88800e2a1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.058956] ^ [ 39.059788] ffff88800e2a1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.060653] ffff88800e2a1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.061530] ================================================================== [ 39.062475] Disabling lock debugging due to kernel taint [ 40.875844] BUG: Bad rss-counter state mm:000000001d59271b type:MM_FILEPAGES val:33 [ 40.876777] BUG: Bad rss-counter state mm:000000001d59271b type:MM_ANONPAGES val:22 [ 41.398849] BUG: Bad rss-counter state mm:0000000095711092 type:MM_FILEPAGES val:33 [ 41.400042] BUG: Bad rss-counter state mm:0000000095711092 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14447' (ECDSA) to the list of known hosts. 2023/06/21 01:13:08 fuzzer started 2023/06/21 01:13:08 dialing manager at localhost:36067 2023/06/21 01:13:08 checking machine... 2023/06/21 01:13:08 checking revisions... [ 42.043061] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:13:08 testing simple program... [ 42.084781] cgroup: Unknown subsys name 'net' [ 42.121546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f70a5d94cd0 CR3=000000000f284000 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=2037303a33313a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a33313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e9ff370 RCX=0000000000000001 RDX=1ffff11001d3fe79 RSI=ffff88800e9ffc80 RDI=ffffffff83640612 RBP=ffff88800e9ff3c8 RSP=ffff88800e9ff358 R8 =0000000000000001 R9 =ffff88800e9ff3b0 R10=0000000000038001 R11=000000000008a84f R12=ffff88800e9ff438 R13=0000000000000000 R14=ffff8880169d0000 R15=0000000000002000 RIP=ffffffff811303b2 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 00007f3957794900 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=00007f3957d4b618 CR3=000000001671e000 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