syzkaller login: [ 31.566009] BUG: Bad rss-counter state mm:00000000e7f612b6 type:MM_FILEPAGES val:33 [ 31.566796] BUG: Bad rss-counter state mm:00000000e7f612b6 type:MM_ANONPAGES val:22 [ 31.598911] ================================================================== [ 31.599734] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.600492] Read of size 8 at addr ffff888019bec880 by task sshd/219 [ 31.601123] [ 31.601300] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.602054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.602841] Call Trace: [ 31.603099] [ 31.603328] dump_stack_lvl+0x91/0xf0 [ 31.603687] print_report+0xcc/0x620 [ 31.604026] ? __virt_addr_valid+0x102/0x340 [ 31.604513] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.604991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.605428] kasan_report+0xbe/0xf0 [ 31.605835] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.606275] vma_interval_tree_remove+0xc75/0xec0 [ 31.606710] vma_prepare+0xc54/0x11a0 [ 31.607052] __split_vma+0x5af/0x950 [ 31.607391] ? __pfx___split_vma+0x10/0x10 [ 31.607764] ? find_held_lock+0x2c/0x110 [ 31.608127] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.608538] ? lock_is_held_type+0x9f/0x120 [ 31.608919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.609348] ? mtree_range_walk+0x632/0x900 [ 31.609776] ? mas_walk+0x5c7/0x7c0 [ 31.610116] do_vmi_munmap+0x1f1/0x2b0 [ 31.610462] mmap_region+0x1f9/0x2660 [ 31.610804] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.611387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.611891] ? __pfx_lock_acquire+0x10/0x10 [ 31.612299] ? __pfx_mmap_region+0x10/0x10 [ 31.612691] ? security_mmap_addr+0x7d/0xa0 [ 31.613067] ? get_unmapped_area+0x1f5/0x3f0 [ 31.613471] do_mmap+0x854/0xf00 [ 31.613844] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.614219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.614616] ksys_mmap_pgoff+0x3af/0x500 [ 31.614977] do_syscall_64+0x3f/0x90 [ 31.615356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615816] RIP: 0033:0x7f46a3ebdd82 [ 31.616141] 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 [ 31.617684] RSP: 002b:00007ffdbd11eee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.618322] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46a3ebdd82 [ 31.618913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46a32f7000 [ 31.619516] RBP: 00007f46a32f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.620116] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562867858ec0 [ 31.620722] R13: 00007ffdbd11ef00 R14: 00007ffdbd11ef30 R15: 00007ffdbd11f290 [ 31.621331] [ 31.621565] [ 31.621712] Allocated by task 212: [ 31.622014] kasan_save_stack+0x22/0x50 [ 31.622415] kasan_set_track+0x25/0x30 [ 31.622765] __kasan_slab_alloc+0x59/0x70 [ 31.623140] kmem_cache_alloc+0x16b/0x370 [ 31.623503] vm_area_dup+0x20/0x160 [ 31.623824] __split_vma+0x170/0x950 [ 31.624156] split_vma+0xc6/0x110 [ 31.624468] mprotect_fixup+0x8d2/0xb30 [ 31.624834] do_mprotect_pkey+0x87e/0xd40 [ 31.625219] __x64_sys_mprotect+0x78/0xc0 [ 31.625631] do_syscall_64+0x3f/0x90 [ 31.625981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.626493] [ 31.626641] Freed by task 212: [ 31.626922] kasan_save_stack+0x22/0x50 [ 31.627292] kasan_set_track+0x25/0x30 [ 31.627647] kasan_save_free_info+0x2b/0x50 [ 31.628025] __kasan_slab_free+0x10a/0x190 [ 31.628418] kmem_cache_free+0x10d/0x4d0 [ 31.628792] rcu_core+0x8c8/0x2860 [ 31.629103] __do_softirq+0x1b7/0x7d4 [ 31.629454] [ 31.629661] Last potentially related work creation: [ 31.630089] kasan_save_stack+0x22/0x50 [ 31.630455] __kasan_record_aux_stack+0x8e/0xa0 [ 31.630865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.631314] remove_vma+0x139/0x170 [ 31.631619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.632007] do_vmi_munmap+0x1f1/0x2b0 [ 31.632347] __vm_munmap+0x138/0x3a0 [ 31.632677] __x64_sys_munmap+0x59/0x80 [ 31.633019] do_syscall_64+0x3f/0x90 [ 31.633392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.633878] [ 31.634029] Second to last potentially related work creation: [ 31.634503] kasan_save_stack+0x22/0x50 [ 31.634852] __kasan_record_aux_stack+0x8e/0xa0 [ 31.635253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.635702] remove_vma+0x139/0x170 [ 31.636018] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.636408] do_vmi_munmap+0x1f1/0x2b0 [ 31.636729] mmap_region+0x1f9/0x2660 [ 31.637046] do_mmap+0x854/0xf00 [ 31.637349] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.637743] ksys_mmap_pgoff+0x3af/0x500 [ 31.638086] do_syscall_64+0x3f/0x90 [ 31.638413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.638858] [ 31.639008] The buggy address belongs to the object at ffff888019bec828 [ 31.639008] which belongs to the cache vm_area_struct of size 168 [ 31.640022] The buggy address is located 88 bytes inside of [ 31.640022] freed 168-byte region [ffff888019bec828, ffff888019bec8d0) [ 31.640986] [ 31.641138] The buggy address belongs to the physical page: [ 31.641642] page:000000008dff5fac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bec [ 31.642399] memcg:ffff88800f53a301 [ 31.642689] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.643175] page_type: 0xffffffff() [ 31.643472] raw: 0100000000000200 ffff88800879fc80 ffffea0000260e00 dead000000000005 [ 31.644090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f53a301 [ 31.644739] page dumped because: kasan: bad access detected [ 31.645188] [ 31.645355] Memory state around the buggy address: [ 31.645807] ffff888019bec780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.646399] ffff888019bec800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.646989] >ffff888019bec880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.647574] ^ [ 31.647856] ffff888019bec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.648448] ffff888019bec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.649024] ================================================================== [ 31.649914] Disabling lock debugging due to kernel taint [ 33.029144] BUG: Bad rss-counter state mm:0000000044df654a type:MM_FILEPAGES val:33 [ 33.029928] BUG: Bad rss-counter state mm:0000000044df654a type:MM_ANONPAGES val:22 [ 33.412251] BUG: Bad rss-counter state mm:00000000bb43faf3 type:MM_FILEPAGES val:33 [ 33.412975] BUG: Bad rss-counter state mm:00000000bb43faf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49656' (ECDSA) to the list of known hosts. 2023/06/20 09:43:06 fuzzer started 2023/06/20 09:43:07 dialing manager at localhost:44161 2023/06/20 09:43:07 checking machine... 2023/06/20 09:43:07 checking revisions... [ 33.992377] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:43:07 testing simple program... [ 34.029739] cgroup: Unknown subsys name 'net' [ 34.076913] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:06 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=00007ffea4321978 CR3=000000000ea0e000 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=2036303a33343a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a33343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fbd1b40 RBX=ffffffff813ad420 RCX=ffff8880198a7288 RDX=0000000000000000 RSI=ffff88800fbd1b40 RDI=ffff8880198a71f0 RBP=ffff8880198a7288 RSP=ffff8880198a71e8 R8 =ffff8880198a7530 R9 =0000000000000000 R10=ffffed1001d8d200 R11=00000000000b6996 R12=ffff8880198a72b8 R13=0000000000000000 R14=ffff88800fbd1b40 R15=0000000000001000 RIP=ffffffff81132a70 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 00007f7247428900 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=00007f72479df618 CR3=000000000e412000 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