syzkaller login: [ 31.548325] BUG: Bad rss-counter state mm:00000000de7846f4 type:MM_FILEPAGES val:33 [ 31.549935] BUG: Bad rss-counter state mm:00000000de7846f4 type:MM_ANONPAGES val:22 [ 31.714721] ================================================================== [ 31.715653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.716600] Read of size 8 at addr ffff88801a350b38 by task sshd/219 [ 31.717362] [ 31.717577] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.718534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.719507] Call Trace: [ 31.719832] [ 31.720113] dump_stack_lvl+0x91/0xf0 [ 31.720606] print_report+0xcc/0x620 [ 31.721091] ? __virt_addr_valid+0x102/0x340 [ 31.721642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722266] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722891] kasan_report+0xbe/0xf0 [ 31.723388] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724010] vma_interval_tree_remove+0xc75/0xec0 [ 31.724617] vma_prepare+0xc54/0x11a0 [ 31.725098] __split_vma+0x5af/0x950 [ 31.725571] ? __pfx___split_vma+0x10/0x10 [ 31.726099] ? find_held_lock+0x2c/0x110 [ 31.726621] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.727198] ? lock_is_held_type+0x9f/0x120 [ 31.727735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.728345] ? mtree_range_walk+0x632/0x900 [ 31.728895] ? mas_walk+0x5c7/0x7c0 [ 31.729369] do_vmi_munmap+0x1f1/0x2b0 [ 31.729857] mmap_region+0x1f9/0x2660 [ 31.730348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.730856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.731589] ? __pfx_lock_acquire+0x10/0x10 [ 31.732120] ? __pfx_mmap_region+0x10/0x10 [ 31.732645] ? security_mmap_addr+0x7d/0xa0 [ 31.733177] ? get_unmapped_area+0x1f5/0x3f0 [ 31.733728] do_mmap+0x854/0xf00 [ 31.734167] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.734667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.735233] ksys_mmap_pgoff+0x3af/0x500 [ 31.735743] do_syscall_64+0x3f/0x90 [ 31.736217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.736859] RIP: 0033:0x7fde9b2eed82 [ 31.737312] 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 [ 31.739427] RSP: 002b:00007ffc82d00118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.740328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde9b2eed82 [ 31.741172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde9a728000 [ 31.742011] RBP: 00007fde9a728000 R08: 0000000000000009 R09: 0000000000001000 [ 31.742856] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d6f280ec0 [ 31.743726] R13: 00007ffc82d00130 R14: 00007ffc82d00160 R15: 00007ffc82d004c0 [ 31.744579] [ 31.744871] [ 31.745088] Allocated by task 212: [ 31.745524] kasan_save_stack+0x22/0x50 [ 31.746025] kasan_set_track+0x25/0x30 [ 31.746526] __kasan_slab_alloc+0x59/0x70 [ 31.747056] kmem_cache_alloc+0x16b/0x370 [ 31.747573] vm_area_dup+0x20/0x160 [ 31.748023] __split_vma+0x170/0x950 [ 31.748500] split_vma+0xc6/0x110 [ 31.748950] mprotect_fixup+0x8d2/0xb30 [ 31.749460] do_mprotect_pkey+0x87e/0xd40 [ 31.749975] __x64_sys_mprotect+0x78/0xc0 [ 31.750493] do_syscall_64+0x3f/0x90 [ 31.750977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.751623] [ 31.751840] Freed by task 212: [ 31.752232] kasan_save_stack+0x22/0x50 [ 31.752740] kasan_set_track+0x25/0x30 [ 31.753234] kasan_save_free_info+0x2b/0x50 [ 31.753769] __kasan_slab_free+0x10a/0x190 [ 31.754302] kmem_cache_free+0x10d/0x4d0 [ 31.754809] rcu_core+0x8c8/0x2860 [ 31.755265] __do_softirq+0x1b7/0x7d4 [ 31.755743] [ 31.755959] Last potentially related work creation: [ 31.756546] kasan_save_stack+0x22/0x50 [ 31.757045] __kasan_record_aux_stack+0x8e/0xa0 [ 31.757623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.758263] remove_vma+0x139/0x170 [ 31.758713] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.759281] do_vmi_munmap+0x1f1/0x2b0 [ 31.759776] __vm_munmap+0x138/0x3a0 [ 31.760241] __x64_sys_munmap+0x59/0x80 [ 31.760737] do_syscall_64+0x3f/0x90 [ 31.761207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.761842] [ 31.762059] The buggy address belongs to the object at ffff88801a350ae0 [ 31.762059] which belongs to the cache vm_area_struct of size 168 [ 31.763542] The buggy address is located 88 bytes inside of [ 31.763542] freed 168-byte region [ffff88801a350ae0, ffff88801a350b88) [ 31.764933] [ 31.765154] The buggy address belongs to the physical page: [ 31.765817] page:0000000057c1cd32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a350 [ 31.766909] memcg:ffff888016dacd01 [ 31.767347] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.767990] page_type: 0xffffffff() [ 31.768445] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.769356] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dacd01 [ 31.770255] page dumped because: kasan: bad access detected [ 31.770910] [ 31.771148] Memory state around the buggy address: [ 31.771728] ffff88801a350a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.772583] ffff88801a350a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.773456] >ffff88801a350b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.774310] ^ [ 31.774919] ffff88801a350b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.775782] ffff88801a350c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.776663] ================================================================== [ 31.777700] Disabling lock debugging due to kernel taint [ 33.669263] BUG: Bad rss-counter state mm:000000000ab08430 type:MM_FILEPAGES val:33 [ 33.670434] BUG: Bad rss-counter state mm:000000000ab08430 type:MM_ANONPAGES val:22 [ 34.094309] BUG: Bad rss-counter state mm:0000000077d94ea4 type:MM_FILEPAGES val:33 [ 34.095491] BUG: Bad rss-counter state mm:0000000077d94ea4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60322' (ECDSA) to the list of known hosts. 2023/06/19 23:19:15 fuzzer started 2023/06/19 23:19:15 dialing manager at localhost:44161 2023/06/19 23:19:15 checking machine... 2023/06/19 23:19:15 checking revisions... [ 34.716861] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:19:15 testing simple program... [ 34.766524] cgroup: Unknown subsys name 'net' [ 34.817053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:15 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=00007fffec6e56a8 CR3=0000000005482000 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=00007f5d526fe510000055e9e88fe790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c1a2d0 RBX=0000000000000002 RCX=ffffffff860d167c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806cf09b00 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d1680 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f80 R15=ffff88806cf09a98 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 00007f90fa857900 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=00007f90fae0e618 CR3=000000000de94000 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