[ 31.767644] BUG: Bad rss-counter state mm:0000000004c2d526 type:MM_FILEPAGES val:33 [ 31.768897] BUG: Bad rss-counter state mm:0000000004c2d526 type:MM_ANONPAGES val:22 [ 31.810321] ================================================================== [ 31.811319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.812289] Read of size 8 at addr ffff88800f061140 by task sshd/220 [ 31.813050] [ 31.813274] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.814135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.815120] Call Trace: [ 31.815436] [ 31.815726] dump_stack_lvl+0x91/0xf0 [ 31.816239] print_report+0xcc/0x620 [ 31.816724] ? __virt_addr_valid+0x102/0x340 [ 31.817285] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.817896] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.818514] kasan_report+0xbe/0xf0 [ 31.819002] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.819635] vma_interval_tree_remove+0xc75/0xec0 [ 31.820262] vma_prepare+0xc54/0x11a0 [ 31.820750] __split_vma+0x5af/0x950 [ 31.821231] ? __pfx___split_vma+0x10/0x10 [ 31.821777] ? find_held_lock+0x2c/0x110 [ 31.822305] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.822888] ? lock_is_held_type+0x9f/0x120 [ 31.823432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.824058] ? mtree_range_walk+0x632/0x900 [ 31.824637] ? mas_walk+0x5c7/0x7c0 [ 31.825122] do_vmi_munmap+0x1f1/0x2b0 [ 31.825624] mmap_region+0x1f9/0x2660 [ 31.826114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.826632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.827351] ? __pfx_lock_acquire+0x10/0x10 [ 31.827893] ? __pfx_mmap_region+0x10/0x10 [ 31.828452] ? security_mmap_addr+0x7d/0xa0 [ 31.828994] ? get_unmapped_area+0x1f5/0x3f0 [ 31.829556] do_mmap+0x854/0xf00 [ 31.830002] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.830508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.831082] ksys_mmap_pgoff+0x3af/0x500 [ 31.831595] do_syscall_64+0x3f/0x90 [ 31.832077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.832742] RIP: 0033:0x7f6e18285d82 [ 31.833203] 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 [ 31.835531] RSP: 002b:00007ffd116c0a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.836495] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e18285d82 [ 31.837364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e176bf000 [ 31.838227] RBP: 00007f6e176bf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.839086] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b25df4d90 [ 31.839949] R13: 00007ffd116c0a30 R14: 00007ffd116c0a60 R15: 00007ffd116c0dc0 [ 31.840844] [ 31.841139] [ 31.841357] Allocated by task 212: [ 31.841794] kasan_save_stack+0x22/0x50 [ 31.842308] kasan_set_track+0x25/0x30 [ 31.842811] __kasan_slab_alloc+0x59/0x70 [ 31.843345] kmem_cache_alloc+0x16b/0x370 [ 31.843878] vm_area_dup+0x20/0x160 [ 31.844354] __split_vma+0x170/0x950 [ 31.844823] split_vma+0xc6/0x110 [ 31.845268] mprotect_fixup+0x8d2/0xb30 [ 31.845777] do_mprotect_pkey+0x87e/0xd40 [ 31.846303] __x64_sys_mprotect+0x78/0xc0 [ 31.846828] do_syscall_64+0x3f/0x90 [ 31.847310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.847960] [ 31.848188] Freed by task 212: [ 31.848586] kasan_save_stack+0x22/0x50 [ 31.849095] kasan_set_track+0x25/0x30 [ 31.849598] kasan_save_free_info+0x2b/0x50 [ 31.850143] __kasan_slab_free+0x10a/0x190 [ 31.850689] kmem_cache_free+0x10d/0x4d0 [ 31.851207] rcu_core+0x8c8/0x2860 [ 31.851657] __do_softirq+0x1b7/0x7d4 [ 31.852144] [ 31.852390] Last potentially related work creation: [ 31.852981] kasan_save_stack+0x22/0x50 [ 31.853501] __kasan_record_aux_stack+0x8e/0xa0 [ 31.854083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.854734] remove_vma+0x139/0x170 [ 31.855197] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.855764] do_vmi_munmap+0x1f1/0x2b0 [ 31.856260] __vm_munmap+0x138/0x3a0 [ 31.856735] __x64_sys_munmap+0x59/0x80 [ 31.857240] do_syscall_64+0x3f/0x90 [ 31.857718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.858373] [ 31.858593] The buggy address belongs to the object at ffff88800f0610e8 [ 31.858593] which belongs to the cache vm_area_struct of size 168 [ 31.860075] The buggy address is located 88 bytes inside of [ 31.860075] freed 168-byte region [ffff88800f0610e8, ffff88800f061190) [ 31.861512] [ 31.861734] The buggy address belongs to the physical page: [ 31.862403] page:000000000aea452e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf061 [ 31.863507] memcg:ffff88800f060101 [ 31.863931] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.864608] page_type: 0xffffffff() [ 31.865061] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.865990] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f060101 [ 31.866907] page dumped because: kasan: bad access detected [ 31.867577] [ 31.867796] Memory state around the buggy address: [ 31.868389] ffff88800f061000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.869263] ffff88800f061080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.870138] >ffff88800f061100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.870998] ^ [ 31.871642] ffff88800f061180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.872517] ffff88800f061200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.873375] ================================================================== [ 31.874462] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.812655] BUG: Bad rss-counter state mm:000000006d5e361a type:MM_FILEPAGES val:33 [ 33.813663] BUG: Bad rss-counter state mm:000000006d5e361a type:MM_ANONPAGES val:22 [ 34.377176] BUG: Bad rss-counter state mm:00000000baaeeeda type:MM_FILEPAGES val:33 [ 34.378329] BUG: Bad rss-counter state mm:00000000baaeeeda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31565' (ECDSA) to the list of known hosts. 2023/06/20 11:10:52 fuzzer started 2023/06/20 11:10:52 dialing manager at localhost:36067 2023/06/20 11:10:52 checking machine... 2023/06/20 11:10:52 checking revisions... [ 35.032029] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:10:52 testing simple program... [ 35.073982] cgroup: Unknown subsys name 'net' [ 35.125204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88801ca57a90 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff1100394af53 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007fc80c785900 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=00007fc80cd3c618 CR3=000000001ca9a000 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=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 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=0000000000000001 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=00007fb89557f290 CR3=000000000c9ee000 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=fbe1e3105c957c8d0b41f0e5dc016bda XMM02=000000000011ad18eff9b2d0a8fce9cb XMM03=000000000011ade82c67c8bc2e329bc3 XMM04=db90e73ca2c4316400000000000ae988 XMM05=19e9129bd510f2350000000000131230 XMM06=c44c9eee9b528e4a0000000000130408 XMM07=e042d86d42eb936e0000000000121940 XMM08=00a86200f6ad836e000000000011ade8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000