syzkaller login: [ 29.902071] BUG: Bad rss-counter state mm:00000000422496be type:MM_FILEPAGES val:33 [ 29.903576] BUG: Bad rss-counter state mm:00000000422496be type:MM_ANONPAGES val:22 [ 30.065058] ================================================================== [ 30.066012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.067025] Read of size 8 at addr ffff888019ff9798 by task sshd/219 [ 30.067831] [ 30.068056] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.069159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.070198] Call Trace: [ 30.070530] [ 30.070833] dump_stack_lvl+0x91/0xf0 [ 30.071358] print_report+0xcc/0x620 [ 30.071862] ? __virt_addr_valid+0x102/0x340 [ 30.072442] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.073108] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.073763] kasan_report+0xbe/0xf0 [ 30.074252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.074915] vma_interval_tree_remove+0xc75/0xec0 [ 30.075546] vma_prepare+0xc54/0x11a0 [ 30.076039] __split_vma+0x5af/0x950 [ 30.076532] ? __pfx___split_vma+0x10/0x10 [ 30.077112] ? find_held_lock+0x2c/0x110 [ 30.077668] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.078264] ? lock_is_held_type+0x9f/0x120 [ 30.078836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.079471] ? mtree_range_walk+0x632/0x900 [ 30.080047] ? mas_walk+0x5c7/0x7c0 [ 30.080542] do_vmi_munmap+0x1f1/0x2b0 [ 30.081074] mmap_region+0x1f9/0x2660 [ 30.081584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.082119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.082872] ? __pfx_lock_acquire+0x10/0x10 [ 30.083427] ? __pfx_mmap_region+0x10/0x10 [ 30.083991] ? security_mmap_addr+0x7d/0xa0 [ 30.084559] ? get_unmapped_area+0x1f5/0x3f0 [ 30.085149] do_mmap+0x854/0xf00 [ 30.085609] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.086127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.086720] ksys_mmap_pgoff+0x3af/0x500 [ 30.087249] do_syscall_64+0x3f/0x90 [ 30.087758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.088439] RIP: 0033:0x7f964e221d82 [ 30.088925] 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 [ 30.091202] RSP: 002b:00007ffc1841c238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.092144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f964e221d82 [ 30.093059] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f964d65b000 [ 30.093960] RBP: 00007f964d65b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.094838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4100d3ec0 [ 30.095748] R13: 00007ffc1841c250 R14: 00007ffc1841c280 R15: 00007ffc1841c5e0 [ 30.096654] [ 30.096960] [ 30.097179] Allocated by task 212: [ 30.097606] kasan_save_stack+0x22/0x50 [ 30.098116] kasan_set_track+0x25/0x30 [ 30.098607] __kasan_slab_alloc+0x59/0x70 [ 30.099127] kmem_cache_alloc+0x16b/0x370 [ 30.099644] vm_area_dup+0x20/0x160 [ 30.100092] __split_vma+0x170/0x950 [ 30.100556] split_vma+0xc6/0x110 [ 30.101006] mprotect_fixup+0x8d2/0xb30 [ 30.101514] do_mprotect_pkey+0x87e/0xd40 [ 30.102044] __x64_sys_mprotect+0x78/0xc0 [ 30.102564] do_syscall_64+0x3f/0x90 [ 30.103049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103687] [ 30.103899] Freed by task 212: [ 30.104290] kasan_save_stack+0x22/0x50 [ 30.104798] kasan_set_track+0x25/0x30 [ 30.105290] kasan_save_free_info+0x2b/0x50 [ 30.105817] __kasan_slab_free+0x10a/0x190 [ 30.106343] kmem_cache_free+0x10d/0x4d0 [ 30.106847] rcu_core+0x8c8/0x2860 [ 30.107291] __do_softirq+0x1b7/0x7d4 [ 30.107766] [ 30.107978] Last potentially related work creation: [ 30.108559] kasan_save_stack+0x22/0x50 [ 30.109075] __kasan_record_aux_stack+0x8e/0xa0 [ 30.109641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.110330] remove_vma+0x139/0x170 [ 30.110780] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.111336] do_vmi_munmap+0x1f1/0x2b0 [ 30.111821] __vm_munmap+0x138/0x3a0 [ 30.112284] __x64_sys_munmap+0x59/0x80 [ 30.112792] do_syscall_64+0x3f/0x90 [ 30.113269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.113904] [ 30.114119] The buggy address belongs to the object at ffff888019ff9740 [ 30.114119] which belongs to the cache vm_area_struct of size 168 [ 30.115583] The buggy address is located 88 bytes inside of [ 30.115583] freed 168-byte region [ffff888019ff9740, ffff888019ff97e8) [ 30.117034] [ 30.117248] The buggy address belongs to the physical page: [ 30.117917] page:000000002003ad7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ff9 [ 30.119011] memcg:ffff888016e32a01 [ 30.119439] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.120085] page_type: 0xffffffff() [ 30.120539] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f6bc0 000000000000000c [ 30.121517] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e32a01 [ 30.122426] page dumped because: kasan: bad access detected [ 30.123086] [ 30.123301] Memory state around the buggy address: [ 30.123888] ffff888019ff9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.124755] ffff888019ff9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.125597] >ffff888019ff9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.126468] ^ [ 30.126988] ffff888019ff9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.127899] ffff888019ff9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.128810] ================================================================== [ 30.129959] Disabling lock debugging due to kernel taint [ 32.051643] BUG: Bad rss-counter state mm:00000000f685930a type:MM_FILEPAGES val:33 [ 32.052574] BUG: Bad rss-counter state mm:00000000f685930a type:MM_ANONPAGES val:22 [ 32.539789] BUG: Bad rss-counter state mm:000000007796e7f8 type:MM_FILEPAGES val:33 [ 32.540766] BUG: Bad rss-counter state mm:000000007796e7f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10050' (ECDSA) to the list of known hosts. 2023/06/20 19:17:53 fuzzer started 2023/06/20 19:17:54 dialing manager at localhost:36067 2023/06/20 19:17:54 checking machine... 2023/06/20 19:17:54 checking revisions... [ 33.300212] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:17:54 testing simple program... [ 33.354410] cgroup: Unknown subsys name 'net' [ 33.410953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:17:53 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff888019b1e5c0 RCX=ffffffff81b28d55 RDX=0000000000000004 RSI=0000000000000004 RDI=0000000000000005 RBP=ffff888010028480 RSP=ffff888015f67718 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000004 R11=0000000000000000 R12=ffff88801918bd00 R13=ffff88801007c000 R14=ffff88801007c738 R15=ffff888015f67790 RIP=ffffffff814c0250 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 00007f537257e700 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=00007f7cbede8618 CR3=000000000da6a000 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=2033353a37313a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=1ffff1100d9e1354 RSI=ffff88806cf09de0 RDI=ffff88806cf09aa0 RBP=ffff88806cf09de0 RSP=ffff88806cf099f0 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 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=00007fd20facb020 CR3=000000000c868000 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=ee3bf3e516b1878b4341b7613054ee3c XMM02=2c67c8bc2e329bc3000000000011b6c8 XMM03=fb795ef6d65770560000000000122938 XMM04=8be2ab02f932e71c00000000000ae988 XMM05=dfcdbad4f1609c370000000000132ad0 XMM06=806171799158d9670000000000132958 XMM07=e042d86d42eb936e0000000000122bb8 XMM08=5b49726c7d1b93d4000000000011b728 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000