syzkaller login: [ 30.537726] BUG: Bad rss-counter state mm:00000000bed9cd89 type:MM_FILEPAGES val:33 [ 30.539003] BUG: Bad rss-counter state mm:00000000bed9cd89 type:MM_ANONPAGES val:22 [ 30.653489] ================================================================== [ 30.654561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.655687] Read of size 8 at addr ffff88800e28d6b0 by task sshd/220 [ 30.656594] [ 30.656993] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.658028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.659218] Call Trace: [ 30.659581] [ 30.659801] dump_stack_lvl+0x91/0xf0 [ 30.660176] print_report+0xcc/0x620 [ 30.660543] ? __virt_addr_valid+0x102/0x340 [ 30.660966] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.661442] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.661916] kasan_report+0xbe/0xf0 [ 30.662287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662764] vma_interval_tree_remove+0xc75/0xec0 [ 30.663241] vma_prepare+0xc54/0x11a0 [ 30.663610] __split_vma+0x5af/0x950 [ 30.663982] ? __pfx___split_vma+0x10/0x10 [ 30.664383] ? find_held_lock+0x2c/0x110 [ 30.664790] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.665226] ? lock_is_held_type+0x9f/0x120 [ 30.665641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.666112] ? mtree_range_walk+0x632/0x900 [ 30.666547] ? mas_walk+0x5c7/0x7c0 [ 30.666929] do_vmi_munmap+0x1f1/0x2b0 [ 30.667314] mmap_region+0x1f9/0x2660 [ 30.667686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.668083] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.668635] ? __pfx_lock_acquire+0x10/0x10 [ 30.669043] ? __pfx_mmap_region+0x10/0x10 [ 30.669454] ? security_mmap_addr+0x7d/0xa0 [ 30.669869] ? get_unmapped_area+0x1f5/0x3f0 [ 30.670291] do_mmap+0x854/0xf00 [ 30.670629] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.671026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.671461] ksys_mmap_pgoff+0x3af/0x500 [ 30.671855] do_syscall_64+0x3f/0x90 [ 30.672224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.672731] RIP: 0033:0x7f0391e5cd82 [ 30.673087] 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 [ 30.674734] RSP: 002b:00007ffeace20718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.675443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0391e5cd82 [ 30.676101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0391296000 [ 30.676758] RBP: 00007f0391296000 R08: 0000000000000009 R09: 0000000000001000 [ 30.677416] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559378a64980 [ 30.678075] R13: 00007ffeace20730 R14: 00007ffeace20760 R15: 00007ffeace20ac0 [ 30.678735] [ 30.678972] [ 30.679141] Allocated by task 213: [ 30.679475] kasan_save_stack+0x22/0x50 [ 30.679866] kasan_set_track+0x25/0x30 [ 30.680255] __kasan_slab_alloc+0x59/0x70 [ 30.680658] kmem_cache_alloc+0x16b/0x370 [ 30.681061] vm_area_dup+0x20/0x160 [ 30.681413] __split_vma+0x170/0x950 [ 30.681778] split_vma+0xc6/0x110 [ 30.682112] mprotect_fixup+0x8d2/0xb30 [ 30.682499] do_mprotect_pkey+0x87e/0xd40 [ 30.682917] __x64_sys_mprotect+0x78/0xc0 [ 30.683319] do_syscall_64+0x3f/0x90 [ 30.683686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684184] [ 30.684349] Freed by task 213: [ 30.684652] kasan_save_stack+0x22/0x50 [ 30.685039] kasan_set_track+0x25/0x30 [ 30.685417] kasan_save_free_info+0x2b/0x50 [ 30.685829] __kasan_slab_free+0x10a/0x190 [ 30.686237] kmem_cache_free+0x10d/0x4d0 [ 30.686630] rcu_core+0x8c8/0x2860 [ 30.686981] __do_softirq+0x1b7/0x7d4 [ 30.687350] [ 30.687514] Last potentially related work creation: [ 30.687972] kasan_save_stack+0x22/0x50 [ 30.688359] __kasan_record_aux_stack+0x8e/0xa0 [ 30.688804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.689301] remove_vma+0x139/0x170 [ 30.689649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.690077] do_vmi_munmap+0x1f1/0x2b0 [ 30.690453] __vm_munmap+0x138/0x3a0 [ 30.690825] __x64_sys_munmap+0x59/0x80 [ 30.691211] do_syscall_64+0x3f/0x90 [ 30.691575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692080] [ 30.692250] Second to last potentially related work creation: [ 30.692776] kasan_save_stack+0x22/0x50 [ 30.693160] __kasan_record_aux_stack+0x8e/0xa0 [ 30.693600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.694099] remove_vma+0x139/0x170 [ 30.694452] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.694911] do_vmi_munmap+0x1f1/0x2b0 [ 30.695286] __vm_munmap+0x138/0x3a0 [ 30.695654] __x64_sys_munmap+0x59/0x80 [ 30.696041] do_syscall_64+0x3f/0x90 [ 30.696408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696903] [ 30.697070] The buggy address belongs to the object at ffff88800e28d658 [ 30.697070] which belongs to the cache vm_area_struct of size 168 [ 30.698333] The buggy address is located 88 bytes inside of [ 30.698333] freed 168-byte region [ffff88800e28d658, ffff88800e28d700) [ 30.699428] [ 30.699593] The buggy address belongs to the physical page: [ 30.700109] page:00000000a6af2347 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe28d [ 30.700952] memcg:ffff88800ea52501 [ 30.701282] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.701824] page_type: 0xffffffff() [ 30.702172] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.702896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea52501 [ 30.703594] page dumped because: kasan: bad access detected [ 30.704104] [ 30.704269] Memory state around the buggy address: [ 30.704716] ffff88800e28d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.705385] ffff88800e28d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.706049] >ffff88800e28d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.706707] ^ [ 30.707166] ffff88800e28d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.707829] ffff88800e28d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.708487] ================================================================== [ 30.709211] Disabling lock debugging due to kernel taint [ 32.896314] BUG: Bad rss-counter state mm:0000000035e98351 type:MM_FILEPAGES val:33 [ 32.897547] BUG: Bad rss-counter state mm:0000000035e98351 type:MM_ANONPAGES val:22 [ 33.292946] BUG: Bad rss-counter state mm:00000000b329587b type:MM_FILEPAGES val:33 [ 33.293992] BUG: Bad rss-counter state mm:00000000b329587b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43140' (ECDSA) to the list of known hosts. 2023/06/20 16:03:58 fuzzer started 2023/06/20 16:03:58 dialing manager at localhost:36067 2023/06/20 16:03:58 checking machine... 2023/06/20 16:03:58 checking revisions... [ 34.018854] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:03:59 testing simple program... [ 34.067147] cgroup: Unknown subsys name 'net' [ 34.115376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:58 Registers: info registers vcpu 0 RAX=1ffff11002d61eb9 RBX=ffffffff813ad470 RCX=ffff888016b0f620 RDX=ffff888016b10000 RSI=ffff888016b0f618 RDI=ffff888016b0f590 RBP=dffffc0000000000 RSP=ffff888016b0f550 R8 =0000000000000001 R9 =ffff888016b0f5c0 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1002d61eb2 R13=ffffed1002d61eb1 R14=ffff888016b0f5c8 R15=ffff888016b0f580 RIP=ffffffff81132d37 RFL=00000286 [--S--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 00007f0d72646900 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=00007f0d72bfd618 CR3=000000001c9da000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f63a54f3660 CR3=000000000c4fe000 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=254db57622faa49da744fef6baf4f469 XMM02=000000000011d240eff9b2d0a8fce9cb XMM03=000000000011d3102c67c8bc2e329bc3 XMM04=7cd1bf27c354133000000000000ae988 XMM05=422f02a4b321924b0000000000132cb0 XMM06=4fda316b135da52b00000000001326a8 XMM07=e042d86d42eb936e0000000000121bf8 XMM08=13c9b5465f3b7adf000000000011d310 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000