[ 31.628129] BUG: Bad rss-counter state mm:0000000010fda437 type:MM_FILEPAGES val:33 [ 31.629198] BUG: Bad rss-counter state mm:0000000010fda437 type:MM_ANONPAGES val:22 [ 31.797437] ================================================================== [ 31.798518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.799639] Read of size 8 at addr ffff88800edfd880 by task sshd/218 [ 31.800746] [ 31.801010] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.802136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.803252] Call Trace: [ 31.803589] [ 31.803895] dump_stack_lvl+0x91/0xf0 [ 31.804416] print_report+0xcc/0x620 [ 31.804926] ? __virt_addr_valid+0x102/0x340 [ 31.805551] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.806222] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.806870] kasan_report+0xbe/0xf0 [ 31.807377] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.808035] vma_interval_tree_remove+0xc75/0xec0 [ 31.808682] vma_prepare+0xc54/0x11a0 [ 31.809236] __split_vma+0x5af/0x950 [ 31.809767] ? __pfx___split_vma+0x10/0x10 [ 31.810341] ? find_held_lock+0x2c/0x110 [ 31.810896] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.811495] ? lock_is_held_type+0x9f/0x120 [ 31.812076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.812722] ? mtree_range_walk+0x632/0x900 [ 31.813362] ? mas_walk+0x5c7/0x7c0 [ 31.813903] do_vmi_munmap+0x1f1/0x2b0 [ 31.814464] mmap_region+0x1f9/0x2660 [ 31.814986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.815531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.816293] ? __pfx_lock_acquire+0x10/0x10 [ 31.816862] ? __pfx_mmap_region+0x10/0x10 [ 31.817425] ? security_mmap_addr+0x7d/0xa0 [ 31.818020] ? get_unmapped_area+0x1f5/0x3f0 [ 31.818649] do_mmap+0x854/0xf00 [ 31.819121] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.819650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.820268] ksys_mmap_pgoff+0x3af/0x500 [ 31.820820] do_syscall_64+0x3f/0x90 [ 31.821335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.822063] RIP: 0033:0x7f9fee107d82 [ 31.822590] 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 [ 31.824876] RSP: 002b:00007ffeda88b398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.825866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fee107d82 [ 31.826821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fed541000 [ 31.827731] RBP: 00007f9fed541000 R08: 0000000000000009 R09: 0000000000001000 [ 31.828637] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558514926ec0 [ 31.829550] R13: 00007ffeda88b3b0 R14: 00007ffeda88b3e0 R15: 00007ffeda88b740 [ 31.830547] [ 31.830862] [ 31.831096] Allocated by task 210: [ 31.831552] kasan_save_stack+0x22/0x50 [ 31.832096] kasan_set_track+0x25/0x30 [ 31.832625] __kasan_slab_alloc+0x59/0x70 [ 31.833190] kmem_cache_alloc+0x16b/0x370 [ 31.833765] vm_area_dup+0x20/0x160 [ 31.834296] __split_vma+0x170/0x950 [ 31.834804] split_vma+0xc6/0x110 [ 31.835271] mprotect_fixup+0x8d2/0xb30 [ 31.835807] do_mprotect_pkey+0x87e/0xd40 [ 31.836368] __x64_sys_mprotect+0x78/0xc0 [ 31.836931] do_syscall_64+0x3f/0x90 [ 31.837441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.838162] [ 31.838420] Freed by task 210: [ 31.838841] kasan_save_stack+0x22/0x50 [ 31.839381] kasan_set_track+0x25/0x30 [ 31.839909] kasan_save_free_info+0x2b/0x50 [ 31.840479] __kasan_slab_free+0x10a/0x190 [ 31.841052] kmem_cache_free+0x10d/0x4d0 [ 31.841654] rcu_core+0x8c8/0x2860 [ 31.842151] __do_softirq+0x1b7/0x7d4 [ 31.842697] [ 31.842935] Last potentially related work creation: [ 31.843555] kasan_save_stack+0x22/0x50 [ 31.844098] __kasan_record_aux_stack+0x8e/0xa0 [ 31.844712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.845402] remove_vma+0x139/0x170 [ 31.845912] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.846558] do_vmi_munmap+0x1f1/0x2b0 [ 31.847082] __vm_munmap+0x138/0x3a0 [ 31.847581] __x64_sys_munmap+0x59/0x80 [ 31.848114] do_syscall_64+0x3f/0x90 [ 31.848622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.849303] [ 31.849533] The buggy address belongs to the object at ffff88800edfd828 [ 31.849533] which belongs to the cache vm_area_struct of size 168 [ 31.851182] The buggy address is located 88 bytes inside of [ 31.851182] freed 168-byte region [ffff88800edfd828, ffff88800edfd8d0) [ 31.852692] [ 31.852927] The buggy address belongs to the physical page: [ 31.853646] page:00000000ae02b344 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedfd [ 31.854866] memcg:ffff88800ee1a001 [ 31.855326] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.856026] page_type: 0xffffffff() [ 31.856512] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ba600 dead000000000008 [ 31.857499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1a001 [ 31.858551] page dumped because: kasan: bad access detected [ 31.859267] [ 31.859498] Memory state around the buggy address: [ 31.860116] ffff88800edfd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.861016] ffff88800edfd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.861934] >ffff88800edfd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.862883] ^ [ 31.863328] ffff88800edfd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.864256] ffff88800edfd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.865152] ================================================================== [ 31.866164] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.466329] BUG: Bad rss-counter state mm:00000000a8a6b615 type:MM_FILEPAGES val:33 [ 34.467031] BUG: Bad rss-counter state mm:00000000a8a6b615 type:MM_ANONPAGES val:22 [ 35.050722] BUG: Bad rss-counter state mm:0000000093d56cea type:MM_FILEPAGES val:33 [ 35.051799] BUG: Bad rss-counter state mm:0000000093d56cea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36800' (ECDSA) to the list of known hosts. 2023/06/21 10:44:15 fuzzer started 2023/06/21 10:44:15 dialing manager at localhost:36067 2023/06/21 10:44:15 checking machine... 2023/06/21 10:44:15 checking revisions... [ 35.811363] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:44:15 testing simple program... [ 35.856044] cgroup: Unknown subsys name 'net' [ 35.913077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:15 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888019961b40 RCX=0000000000000000 RDX=ffff888019961b40 RSI=ffffffff814023fa RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800fbffbe0 R8 =0000000000000005 R9 =0000000000000000 R10=00000000ffffffff R11=0000000000000000 R12=ffff88800fbffcc0 R13=ffffed100332c368 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b RFL=00000282 [--S----] 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 00007fdf4ddee700 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=00007f9cff9b1d50 CR3=000000000c636000 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=2034313a34343a3031203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=ffffffff85d7ae88 RCX=ffffffff8100455b RDX=0000000000000013 RSI=ffffffff860743f8 RDI=ffffffff85d7ae64 RBP=ffffffff85d7ae64 RSP=ffff888008e378c0 R8 =ffffffff860743f8 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000000128 R12=ffffffff85d7aeb0 R13=ffffffff85d7ae64 R14=ffffffff85d7ae64 R15=dffffc0000000000 RIP=ffffffff8112fc73 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 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=00007f2475188618 CR3=0000000008cc6000 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