syzkaller login: [ 32.262575] BUG: Bad rss-counter state mm:00000000505c1f0d type:MM_FILEPAGES val:33 [ 32.263524] BUG: Bad rss-counter state mm:00000000505c1f0d type:MM_ANONPAGES val:22 [ 32.428358] ================================================================== [ 32.429454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.430598] Read of size 8 at addr ffff888019ed9798 by task sshd/221 [ 32.431656] [ 32.431867] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.432712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.433682] Call Trace: [ 32.433986] [ 32.434254] dump_stack_lvl+0x91/0xf0 [ 32.434717] print_report+0xcc/0x620 [ 32.435171] ? __virt_addr_valid+0x102/0x340 [ 32.435691] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.436280] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.436892] kasan_report+0xbe/0xf0 [ 32.437363] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.437984] vma_interval_tree_remove+0xc75/0xec0 [ 32.438584] vma_prepare+0xc54/0x11a0 [ 32.439103] __split_vma+0x5af/0x950 [ 32.439600] ? __pfx___split_vma+0x10/0x10 [ 32.440168] ? find_held_lock+0x2c/0x110 [ 32.440744] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.441346] ? lock_is_held_type+0x9f/0x120 [ 32.441927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.442574] ? mtree_range_walk+0x632/0x900 [ 32.443163] ? mas_walk+0x5c7/0x7c0 [ 32.443659] do_vmi_munmap+0x1f1/0x2b0 [ 32.444185] mmap_region+0x1f9/0x2660 [ 32.444712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.445257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.446030] ? __pfx_lock_acquire+0x10/0x10 [ 32.446602] ? __pfx_mmap_region+0x10/0x10 [ 32.447179] ? security_mmap_addr+0x7d/0xa0 [ 32.447741] ? get_unmapped_area+0x1f5/0x3f0 [ 32.448332] do_mmap+0x854/0xf00 [ 32.448796] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.449323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.449920] ksys_mmap_pgoff+0x3af/0x500 [ 32.450465] do_syscall_64+0x3f/0x90 [ 32.450980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.451664] RIP: 0033:0x7ff2b8992d82 [ 32.452155] 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 [ 32.454418] RSP: 002b:00007ffdd84a1218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.455374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2b8992d82 [ 32.456280] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2b7dcc000 [ 32.457185] RBP: 00007ff2b7dcc000 R08: 0000000000000009 R09: 0000000000001000 [ 32.458089] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d98309ec0 [ 32.458982] R13: 00007ffdd84a1230 R14: 00007ffdd84a1260 R15: 00007ffdd84a15c0 [ 32.459891] [ 32.460225] [ 32.460451] Allocated by task 214: [ 32.460914] kasan_save_stack+0x22/0x50 [ 32.461441] kasan_set_track+0x25/0x30 [ 32.461971] __kasan_slab_alloc+0x59/0x70 [ 32.462532] kmem_cache_alloc+0x16b/0x370 [ 32.463094] vm_area_dup+0x20/0x160 [ 32.463571] __split_vma+0x170/0x950 [ 32.464066] split_vma+0xc6/0x110 [ 32.464527] mprotect_fixup+0x8d2/0xb30 [ 32.465063] do_mprotect_pkey+0x87e/0xd40 [ 32.465607] __x64_sys_mprotect+0x78/0xc0 [ 32.466167] do_syscall_64+0x3f/0x90 [ 32.466669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.467341] [ 32.467575] Freed by task 204: [ 32.467997] kasan_save_stack+0x22/0x50 [ 32.468533] kasan_set_track+0x25/0x30 [ 32.469060] kasan_save_free_info+0x2b/0x50 [ 32.469622] __kasan_slab_free+0x10a/0x190 [ 32.470195] kmem_cache_free+0x10d/0x4d0 [ 32.470738] rcu_core+0x8c8/0x2860 [ 32.471217] __do_softirq+0x1b7/0x7d4 [ 32.471725] [ 32.471960] Last potentially related work creation: [ 32.472590] kasan_save_stack+0x22/0x50 [ 32.473119] __kasan_record_aux_stack+0x8e/0xa0 [ 32.473725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.474399] remove_vma+0x139/0x170 [ 32.474882] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.475479] do_vmi_munmap+0x1f1/0x2b0 [ 32.475996] __vm_munmap+0x138/0x3a0 [ 32.476493] __x64_sys_munmap+0x59/0x80 [ 32.477028] do_syscall_64+0x3f/0x90 [ 32.477527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.478214] [ 32.478444] Second to last potentially related work creation: [ 32.479188] kasan_save_stack+0x22/0x50 [ 32.479725] __kasan_record_aux_stack+0x8e/0xa0 [ 32.480352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.481043] remove_vma+0x139/0x170 [ 32.481523] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.482129] do_vmi_munmap+0x1f1/0x2b0 [ 32.482638] mmap_region+0x1f9/0x2660 [ 32.483145] do_mmap+0x854/0xf00 [ 32.483600] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.484126] ksys_mmap_pgoff+0x7d/0x500 [ 32.484646] do_syscall_64+0x3f/0x90 [ 32.485149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.485849] [ 32.486081] The buggy address belongs to the object at ffff888019ed9740 [ 32.486081] which belongs to the cache vm_area_struct of size 168 [ 32.487635] The buggy address is located 88 bytes inside of [ 32.487635] freed 168-byte region [ffff888019ed9740, ffff888019ed97e8) [ 32.489149] [ 32.489376] The buggy address belongs to the physical page: [ 32.490082] page:00000000553aabc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ed9 [ 32.491236] memcg:ffff888015f84d01 [ 32.491698] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.492400] page_type: 0xffffffff() [ 32.492875] raw: 0100000000000200 ffff88800879fc80 ffffea0000575640 0000000000000006 [ 32.493860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f84d01 [ 32.494820] page dumped because: kasan: bad access detected [ 32.495516] [ 32.495747] Memory state around the buggy address: [ 32.496369] ffff888019ed9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.497282] ffff888019ed9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.498197] >ffff888019ed9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.499111] ^ [ 32.499630] ffff888019ed9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.500560] ffff888019ed9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.501458] ================================================================== [ 32.502616] Disabling lock debugging due to kernel taint [ 34.436806] BUG: Bad rss-counter state mm:0000000024d33100 type:MM_FILEPAGES val:33 [ 34.437774] BUG: Bad rss-counter state mm:0000000024d33100 type:MM_ANONPAGES val:22 [ 34.929005] BUG: Bad rss-counter state mm:00000000a1fc8a80 type:MM_FILEPAGES val:33 [ 34.930017] BUG: Bad rss-counter state mm:00000000a1fc8a80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5766' (ECDSA) to the list of known hosts. 2023/06/20 01:37:16 fuzzer started 2023/06/20 01:37:16 dialing manager at localhost:44161 2023/06/20 01:37:16 checking machine... 2023/06/20 01:37:16 checking revisions... [ 35.672584] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:37:16 testing simple program... [ 35.714786] cgroup: Unknown subsys name 'net' [ 35.758122] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:37:14 Registers: info registers vcpu 0 RAX=1ffffffff0a5883d RBX=000000000000002e RCX=ffffffff817907df RDX=0000000000000000 RSI=0000000000016d4b RDI=ffffea00005b52c0 RBP=ffffea00005b52c0 RSP=ffff88806ce09e10 R8 =0000000000000001 R9 =fffff940000b6a5e R10=ffffea00005b52f7 R11=0000000000000000 R12=0000000000000000 R13=0000000000016d4b R14=ffff88806ce35000 R15=ffffea00005b52c0 RIP=ffffffff817885a7 RFL=00000216 [----AP-] 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 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=00007f5146e44000 CR3=0000000009da4000 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=2036313a37333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001f82fc2 RBX=0000000000000008 RCX=ffffffff8449f02b RDX=ffff88801a0351c0 RSI=00007f4174c8efff RDI=00007f4174c8f000 RBP=ffff88800fc17e08 RSP=ffff888009e8f048 R8 =0000000000000000 R9 =0000000000000001 R10=000000000000000f R11=00000000000b6996 R12=0000000000000001 R13=000000000000000f R14=00007f4174c8f000 R15=00007f4174c8efff RIP=ffffffff814c02f8 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 00007f4174cda900 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=00007f4174c93008 CR3=000000001479c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000