syzkaller login: [ 30.499495] BUG: Bad rss-counter state mm:000000004e6d7b7e type:MM_FILEPAGES val:33 [ 30.500804] BUG: Bad rss-counter state mm:000000004e6d7b7e type:MM_ANONPAGES val:22 [ 30.669382] ================================================================== [ 30.670459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.671570] Read of size 8 at addr ffff88801b8a2310 by task sshd/219 [ 30.672645] [ 30.672934] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.674097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.675409] Call Trace: [ 30.675807] [ 30.676082] dump_stack_lvl+0x91/0xf0 [ 30.676557] print_report+0xcc/0x620 [ 30.677020] ? __virt_addr_valid+0x102/0x340 [ 30.677547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678135] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678720] kasan_report+0xbe/0xf0 [ 30.679191] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.679803] vma_interval_tree_remove+0xc75/0xec0 [ 30.680408] vma_prepare+0xc54/0x11a0 [ 30.680881] __split_vma+0x5af/0x950 [ 30.681358] ? __pfx___split_vma+0x10/0x10 [ 30.681880] ? find_held_lock+0x2c/0x110 [ 30.682394] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.682964] ? lock_is_held_type+0x9f/0x120 [ 30.683527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.684142] ? mtree_range_walk+0x632/0x900 [ 30.684706] ? mas_walk+0x5c7/0x7c0 [ 30.685188] do_vmi_munmap+0x1f1/0x2b0 [ 30.685676] mmap_region+0x1f9/0x2660 [ 30.686150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.686673] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.687400] ? __pfx_lock_acquire+0x10/0x10 [ 30.687939] ? __pfx_mmap_region+0x10/0x10 [ 30.688471] ? security_mmap_addr+0x7d/0xa0 [ 30.689002] ? get_unmapped_area+0x1f5/0x3f0 [ 30.689551] do_mmap+0x854/0xf00 [ 30.689986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.690474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.691038] ksys_mmap_pgoff+0x3af/0x500 [ 30.691555] do_syscall_64+0x3f/0x90 [ 30.692030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692674] RIP: 0033:0x7f6671b8ad82 [ 30.693127] 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 [ 30.695265] RSP: 002b:00007ffd871e70f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.696164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6671b8ad82 [ 30.697002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6670fc4000 [ 30.697839] RBP: 00007f6670fc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.698677] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e9cd77d90 [ 30.699537] R13: 00007ffd871e7110 R14: 00007ffd871e7140 R15: 00007ffd871e74a0 [ 30.700387] [ 30.700670] [ 30.700883] Allocated by task 212: [ 30.701310] kasan_save_stack+0x22/0x50 [ 30.701801] kasan_set_track+0x25/0x30 [ 30.702284] __kasan_slab_alloc+0x59/0x70 [ 30.702803] kmem_cache_alloc+0x16b/0x370 [ 30.703324] vm_area_dup+0x20/0x160 [ 30.703773] __split_vma+0x170/0x950 [ 30.704232] split_vma+0xc6/0x110 [ 30.704660] mprotect_fixup+0x8d2/0xb30 [ 30.705143] do_mprotect_pkey+0x87e/0xd40 [ 30.705668] __x64_sys_mprotect+0x78/0xc0 [ 30.706175] do_syscall_64+0x3f/0x90 [ 30.706641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.707288] [ 30.707504] Freed by task 212: [ 30.707884] kasan_save_stack+0x22/0x50 [ 30.708383] kasan_set_track+0x25/0x30 [ 30.708863] kasan_save_free_info+0x2b/0x50 [ 30.709381] __kasan_slab_free+0x10a/0x190 [ 30.709906] kmem_cache_free+0x10d/0x4d0 [ 30.710400] rcu_core+0x8c8/0x2860 [ 30.710835] __do_softirq+0x1b7/0x7d4 [ 30.711318] [ 30.711532] Last potentially related work creation: [ 30.712150] kasan_save_stack+0x22/0x50 [ 30.712731] __kasan_record_aux_stack+0x8e/0xa0 [ 30.713421] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.714155] remove_vma+0x139/0x170 [ 30.714674] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.715317] do_vmi_munmap+0x1f1/0x2b0 [ 30.715859] __vm_munmap+0x138/0x3a0 [ 30.716380] __x64_sys_munmap+0x59/0x80 [ 30.716940] do_syscall_64+0x3f/0x90 [ 30.717481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718191] [ 30.718437] The buggy address belongs to the object at ffff88801b8a22b8 [ 30.718437] which belongs to the cache vm_area_struct of size 168 [ 30.720109] The buggy address is located 88 bytes inside of [ 30.720109] freed 168-byte region [ffff88801b8a22b8, ffff88801b8a2360) [ 30.721705] [ 30.721952] The buggy address belongs to the physical page: [ 30.722699] page:00000000a1933a77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b8a2 [ 30.723927] memcg:ffff88800c672901 [ 30.724418] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.725147] page_type: 0xffffffff() [ 30.725656] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.726685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c672901 [ 30.727737] page dumped because: kasan: bad access detected [ 30.728501] [ 30.728743] Memory state around the buggy address: [ 30.729390] ffff88801b8a2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.730352] ffff88801b8a2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.731326] >ffff88801b8a2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.732291] ^ [ 30.732818] ffff88801b8a2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.733787] ffff88801b8a2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.734754] ================================================================== [ 30.735811] Disabling lock debugging due to kernel taint [ 33.272684] BUG: Bad rss-counter state mm:0000000075a8edcb type:MM_FILEPAGES val:33 [ 33.273667] BUG: Bad rss-counter state mm:0000000075a8edcb type:MM_ANONPAGES val:22 [ 33.704612] BUG: Bad rss-counter state mm:000000008d981902 type:MM_FILEPAGES val:33 [ 33.706272] BUG: Bad rss-counter state mm:000000008d981902 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33752' (ECDSA) to the list of known hosts. 2023/06/20 23:43:25 fuzzer started 2023/06/20 23:43:25 dialing manager at localhost:36067 2023/06/20 23:43:25 checking machine... 2023/06/20 23:43:25 checking revisions... [ 34.439167] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:43:25 testing simple program... [ 34.485335] cgroup: Unknown subsys name 'net' [ 34.537604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:43:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014573680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888014573a74 RBP=00007f95b852b19d RSP=ffff8880147c7438 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f95b852b19d R13=0000000000000000 R14=ffff888014573680 R15=1ffff110028f8f1d RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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 00007f95b7c61900 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=00007f3a9085c650 CR3=000000000c54c000 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=cd48c2f2b921fd8a1d47fc63badbe6f0 XMM02=000000000011d968eff9b2d0a8fce9cb XMM03=000000000011da382c67c8bc2e329bc3 XMM04=525035a383ffaf3200000000000ae988 XMM05=fe89e0945a385bf00000000000132880 XMM06=806171799158d9670000000000131300 XMM07=fb795ef6d65770560000000000121648 XMM08=2c67c8bc2e329bc3000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83636c06 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100203feec RSI=ffffffff83636c06 RDI=ffff8880101ff7d0 RBP=ffff8880101ff7a0 RSP=ffff8880101ff700 R8 =0000000000000001 R9 =ffff8880101ff748 R10=0000000000038001 R11=0000000000091bda R12=ffff8880101ff7d0 R13=0000000000000000 R14=ffff888017d5b680 R15=0000000000082cc0 RIP=ffffffff813ad474 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 00007f3a902a7900 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=00007f3a9085e618 CR3=0000000014778000 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