syzkaller login: [ 31.561931] BUG: Bad rss-counter state mm:000000002eb1749e type:MM_FILEPAGES val:33 [ 31.563059] BUG: Bad rss-counter state mm:000000002eb1749e type:MM_ANONPAGES val:22 [ 31.730008] ================================================================== [ 31.730989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.731957] Read of size 8 at addr ffff888018edf968 by task sshd/220 [ 31.732753] [ 31.732978] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.734013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.735047] Call Trace: [ 31.735388] [ 31.735690] dump_stack_lvl+0x91/0xf0 [ 31.736202] print_report+0xcc/0x620 [ 31.736703] ? __virt_addr_valid+0x102/0x340 [ 31.737272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.737919] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.738555] kasan_report+0xbe/0xf0 [ 31.739073] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739724] vma_interval_tree_remove+0xc75/0xec0 [ 31.740350] vma_prepare+0xc54/0x11a0 [ 31.740844] __split_vma+0x5af/0x950 [ 31.741336] ? __pfx___split_vma+0x10/0x10 [ 31.741885] ? find_held_lock+0x2c/0x110 [ 31.742423] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.743026] ? lock_is_held_type+0x9f/0x120 [ 31.743593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.744235] ? mtree_range_walk+0x632/0x900 [ 31.744809] ? mas_walk+0x5c7/0x7c0 [ 31.745302] do_vmi_munmap+0x1f1/0x2b0 [ 31.745815] mmap_region+0x1f9/0x2660 [ 31.746325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.746854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.747602] ? __pfx_lock_acquire+0x10/0x10 [ 31.748166] ? __pfx_mmap_region+0x10/0x10 [ 31.748724] ? security_mmap_addr+0x7d/0xa0 [ 31.749279] ? get_unmapped_area+0x1f5/0x3f0 [ 31.749850] do_mmap+0x854/0xf00 [ 31.750313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.750828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.751433] ksys_mmap_pgoff+0x3af/0x500 [ 31.751960] do_syscall_64+0x3f/0x90 [ 31.752454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.753131] RIP: 0033:0x7fcba3fb8d82 [ 31.753607] 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 [ 31.755869] RSP: 002b:00007ffc79c3abb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.756835] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcba3fb8d82 [ 31.757717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcba33f2000 [ 31.758610] RBP: 00007fcba33f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.759513] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623e22cfb20 [ 31.760396] R13: 00007ffc79c3abd0 R14: 00007ffc79c3ac00 R15: 00007ffc79c3af60 [ 31.761286] [ 31.761585] [ 31.761807] Allocated by task 213: [ 31.762257] kasan_save_stack+0x22/0x50 [ 31.762784] kasan_set_track+0x25/0x30 [ 31.763312] __kasan_slab_alloc+0x59/0x70 [ 31.763854] kmem_cache_alloc+0x16b/0x370 [ 31.764386] vm_area_dup+0x20/0x160 [ 31.764862] __split_vma+0x170/0x950 [ 31.765338] split_vma+0xc6/0x110 [ 31.765792] mprotect_fixup+0x8d2/0xb30 [ 31.766320] do_mprotect_pkey+0x87e/0xd40 [ 31.766860] __x64_sys_mprotect+0x78/0xc0 [ 31.767416] do_syscall_64+0x3f/0x90 [ 31.767922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.768584] [ 31.768805] Freed by task 203: [ 31.769207] kasan_save_stack+0x22/0x50 [ 31.769724] kasan_set_track+0x25/0x30 [ 31.770229] kasan_save_free_info+0x2b/0x50 [ 31.770781] __kasan_slab_free+0x10a/0x190 [ 31.771346] kmem_cache_free+0x10d/0x4d0 [ 31.771861] rcu_core+0x8c8/0x2860 [ 31.772342] __do_softirq+0x1b7/0x7d4 [ 31.772840] [ 31.773059] Last potentially related work creation: [ 31.773669] kasan_save_stack+0x22/0x50 [ 31.774199] __kasan_record_aux_stack+0x8e/0xa0 [ 31.774871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.775581] remove_vma+0x139/0x170 [ 31.776049] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.776634] do_vmi_munmap+0x1f1/0x2b0 [ 31.777140] __vm_munmap+0x138/0x3a0 [ 31.777637] __x64_sys_munmap+0x59/0x80 [ 31.778142] do_syscall_64+0x3f/0x90 [ 31.778631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.779310] [ 31.779536] The buggy address belongs to the object at ffff888018edf910 [ 31.779536] which belongs to the cache vm_area_struct of size 168 [ 31.781067] The buggy address is located 88 bytes inside of [ 31.781067] freed 168-byte region [ffff888018edf910, ffff888018edf9b8) [ 31.782539] [ 31.782767] The buggy address belongs to the physical page: [ 31.783470] page:00000000648c2c74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18edf [ 31.784597] memcg:ffff88800dc0fd01 [ 31.785043] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.785708] page_type: 0xffffffff() [ 31.786181] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.787159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc0fd01 [ 31.788115] page dumped because: kasan: bad access detected [ 31.788797] [ 31.789019] Memory state around the buggy address: [ 31.789625] ffff888018edf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.790521] ffff888018edf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.791437] >ffff888018edf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.792322] ^ [ 31.793148] ffff888018edf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.794048] ffff888018edfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.794955] ================================================================== [ 31.795949] Disabling lock debugging due to kernel taint [ 33.912008] BUG: Bad rss-counter state mm:000000001994bb6e type:MM_FILEPAGES val:33 [ 33.913204] BUG: Bad rss-counter state mm:000000001994bb6e type:MM_ANONPAGES val:22 [ 34.456771] BUG: Bad rss-counter state mm:00000000c004e777 type:MM_FILEPAGES val:33 [ 34.457935] BUG: Bad rss-counter state mm:00000000c004e777 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57431' (ECDSA) to the list of known hosts. 2023/06/21 05:20:31 fuzzer started 2023/06/21 05:20:32 dialing manager at localhost:36067 2023/06/21 05:20:32 checking machine... 2023/06/21 05:20:32 checking revisions... [ 35.154859] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:20:32 testing simple program... [ 35.194352] cgroup: Unknown subsys name 'net' [ 35.242950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:20:31 Registers: info registers vcpu 0 RAX=1ffff11002cfd8ab RBX=ffff8880167ec528 RCX=1ffff11001f98544 RDX=dffffc0000000000 RSI=ffff88801927ecf8 RDI=ffff8880167ec558 RBP=ffff88800fcc29f0 RSP=ffff88801674fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801927ebc0 R13=0000000000000000 R14=ffff88800ea6fc28 R15=ffff88800ea6fbe0 RIP=ffffffff8184767e RFL=00000046 [---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 00007f117436d900 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=00007f11749250b0 CR3=000000001cdb2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f72937df640 CR3=000000000d644000 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=524d0cb32bc7a088db4df845a3c6609e XMM02=000000000011aba0eff9b2d0a8fce9cb XMM03=000000000011ac702c67c8bc2e329bc3 XMM04=ba565c321cf24ff900000000000ae988 XMM05=19e9129bd510f2350000000000132300 XMM06=8f5e7b56778cafb10000000000131168 XMM07=e042d86d42eb936e0000000000122700 XMM08=38c3ba065826e544000000000011ac70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000