[ 30.610564] BUG: Bad rss-counter state mm:000000009a04a2c6 type:MM_FILEPAGES val:33 [ 30.612025] BUG: Bad rss-counter state mm:000000009a04a2c6 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.787997] ================================================================== [ 30.789098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.790234] Read of size 8 at addr ffff888019b526b0 by task sshd/220 [ 30.791306] [ 30.791527] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.792395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.793379] Call Trace: [ 30.793702] [ 30.793987] dump_stack_lvl+0x91/0xf0 [ 30.794488] print_report+0xcc/0x620 [ 30.794977] ? __virt_addr_valid+0x102/0x340 [ 30.795536] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796155] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796781] kasan_report+0xbe/0xf0 [ 30.797265] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797891] vma_interval_tree_remove+0xc75/0xec0 [ 30.798515] vma_prepare+0xc54/0x11a0 [ 30.799014] __split_vma+0x5af/0x950 [ 30.799505] ? __pfx___split_vma+0x10/0x10 [ 30.800049] ? find_held_lock+0x2c/0x110 [ 30.800574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.801161] ? lock_is_held_type+0x9f/0x120 [ 30.801704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.802323] ? mtree_range_walk+0x632/0x900 [ 30.802903] ? mas_walk+0x5c7/0x7c0 [ 30.803390] do_vmi_munmap+0x1f1/0x2b0 [ 30.803882] mmap_region+0x1f9/0x2660 [ 30.804373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.804891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.805617] ? __pfx_lock_acquire+0x10/0x10 [ 30.806159] ? __pfx_mmap_region+0x10/0x10 [ 30.806708] ? security_mmap_addr+0x7d/0xa0 [ 30.807258] ? get_unmapped_area+0x1f5/0x3f0 [ 30.807830] do_mmap+0x854/0xf00 [ 30.808285] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.808787] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.809362] ksys_mmap_pgoff+0x3af/0x500 [ 30.809872] do_syscall_64+0x3f/0x90 [ 30.810362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811052] RIP: 0033:0x7fa96031dd82 [ 30.811534] 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 [ 30.813698] RSP: 002b:00007ffeff343638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.814627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa96031dd82 [ 30.815486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa95f757000 [ 30.816353] RBP: 00007fa95f757000 R08: 0000000000000009 R09: 0000000000001000 [ 30.817217] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c942bc5b20 [ 30.818070] R13: 00007ffeff343650 R14: 00007ffeff343680 R15: 00007ffeff3439e0 [ 30.818952] [ 30.819251] [ 30.819473] Allocated by task 213: [ 30.819909] kasan_save_stack+0x22/0x50 [ 30.820439] kasan_set_track+0x25/0x30 [ 30.820942] __kasan_slab_alloc+0x59/0x70 [ 30.821469] kmem_cache_alloc+0x16b/0x370 [ 30.822006] vm_area_dup+0x20/0x160 [ 30.822490] __split_vma+0x170/0x950 [ 30.822963] split_vma+0xc6/0x110 [ 30.823412] mprotect_fixup+0x8d2/0xb30 [ 30.823929] do_mprotect_pkey+0x87e/0xd40 [ 30.824468] __x64_sys_mprotect+0x78/0xc0 [ 30.824999] do_syscall_64+0x3f/0x90 [ 30.825492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826149] [ 30.826373] Freed by task 204: [ 30.826784] kasan_save_stack+0x22/0x50 [ 30.827296] kasan_set_track+0x25/0x30 [ 30.827804] kasan_save_free_info+0x2b/0x50 [ 30.828351] __kasan_slab_free+0x10a/0x190 [ 30.828899] kmem_cache_free+0x10d/0x4d0 [ 30.829424] rcu_core+0x8c8/0x2860 [ 30.829877] __do_softirq+0x1b7/0x7d4 [ 30.830369] [ 30.830592] Last potentially related work creation: [ 30.831180] kasan_save_stack+0x22/0x50 [ 30.831756] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833005] remove_vma+0x139/0x170 [ 30.833462] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834032] do_vmi_munmap+0x1f1/0x2b0 [ 30.834563] __vm_munmap+0x138/0x3a0 [ 30.835046] __x64_sys_munmap+0x59/0x80 [ 30.835555] do_syscall_64+0x3f/0x90 [ 30.836035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836689] [ 30.836907] The buggy address belongs to the object at ffff888019b52658 [ 30.836907] which belongs to the cache vm_area_struct of size 168 [ 30.838390] The buggy address is located 88 bytes inside of [ 30.838390] freed 168-byte region [ffff888019b52658, ffff888019b52700) [ 30.839840] [ 30.840058] The buggy address belongs to the physical page: [ 30.840749] page:00000000bfaf3d88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b52 [ 30.841877] memcg:ffff8880158df401 [ 30.842307] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.842984] page_type: 0xffffffff() [ 30.843442] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.844383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158df401 [ 30.845316] page dumped because: kasan: bad access detected [ 30.845981] [ 30.846196] Memory state around the buggy address: [ 30.846799] ffff888019b52580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.847676] ffff888019b52600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.848546] >ffff888019b52680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.849416] ^ [ 30.850014] ffff888019b52700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.850900] ffff888019b52780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.851772] ================================================================== [ 30.852820] Disabling lock debugging due to kernel taint [ 33.722873] BUG: Bad rss-counter state mm:0000000077690ab3 type:MM_FILEPAGES val:33 [ 33.724057] BUG: Bad rss-counter state mm:0000000077690ab3 type:MM_ANONPAGES val:22 [ 34.219913] BUG: Bad rss-counter state mm:00000000af9e818e type:MM_FILEPAGES val:33 [ 34.221078] BUG: Bad rss-counter state mm:00000000af9e818e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25557' (ECDSA) to the list of known hosts. 2023/06/20 06:48:13 fuzzer started 2023/06/20 06:48:13 dialing manager at localhost:44161 2023/06/20 06:48:13 checking machine... 2023/06/20 06:48:13 checking revisions... [ 34.865874] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:48:13 testing simple program... [ 34.923116] cgroup: Unknown subsys name 'net' [ 34.965720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81839a7d RSP=ffff88806ce09dc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=0000000000000000 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007fcdc79d8900 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=00007fcdc6e4fe10 CR3=000000000d672000 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=d9d2bc8db4ca0cb1ce42492890f86087 XMM02=eff9b2d0a8fce9cb000000000011d250 XMM03=2c67c8bc2e329bc3000000000011d378 XMM04=6a30c5614166b78900000000000ae988 XMM05=e3bd0ed1719a86300000000000134ab0 XMM06=4fda316b135da52b00000000001337e0 XMM07=fb795ef6d657705600000000001240c8 XMM08=2c67c8bc2e329bc3000000000011d378 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=ffff88801cad2d00 RCX=0000000000000000 RDX=ffff88800b997b40 RSI=0000000000000016 RDI=000000000000001f RBP=0000000000000014 RSP=ffff88800b997ad0 R8 =0000000000000004 R9 =0000000000000014 R10=0000000000000014 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801cad2d04 R14=000000000000001f R15=ffff88801bfea3c0 RIP=ffffffff81f2c954 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 00007fe1d54ae900 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=00007fe1d5a65618 CR3=0000000019ae0000 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