syzkaller login: [ 30.541083] BUG: Bad rss-counter state mm:000000003e351bc2 type:MM_FILEPAGES val:33 [ 30.542285] BUG: Bad rss-counter state mm:000000003e351bc2 type:MM_ANONPAGES val:22 [ 30.580415] ================================================================== [ 30.581490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.582619] Read of size 8 at addr ffff888019b59058 by task sshd/220 [ 30.583374] [ 30.583586] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.584565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.585653] Call Trace: [ 30.586060] [ 30.586346] dump_stack_lvl+0x91/0xf0 [ 30.586911] print_report+0xcc/0x620 [ 30.587485] ? __virt_addr_valid+0x102/0x340 [ 30.588158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.588863] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.589469] kasan_report+0xbe/0xf0 [ 30.590017] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.590759] vma_interval_tree_remove+0xc75/0xec0 [ 30.591360] vma_prepare+0xc54/0x11a0 [ 30.591853] __split_vma+0x5af/0x950 [ 30.592325] ? __pfx___split_vma+0x10/0x10 [ 30.592846] ? find_held_lock+0x2c/0x110 [ 30.593361] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.593918] ? lock_is_held_type+0x9f/0x120 [ 30.594457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.595051] ? mtree_range_walk+0x632/0x900 [ 30.595606] ? mas_walk+0x5c7/0x7c0 [ 30.596084] do_vmi_munmap+0x1f1/0x2b0 [ 30.596577] mmap_region+0x1f9/0x2660 [ 30.597053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.597581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.598360] ? __pfx_lock_acquire+0x10/0x10 [ 30.598891] ? __pfx_mmap_region+0x10/0x10 [ 30.599420] ? security_mmap_addr+0x7d/0xa0 [ 30.599967] ? get_unmapped_area+0x1f5/0x3f0 [ 30.600510] do_mmap+0x854/0xf00 [ 30.600951] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.601439] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.602005] ksys_mmap_pgoff+0x3af/0x500 [ 30.602512] do_syscall_64+0x3f/0x90 [ 30.602994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603651] RIP: 0033:0x7f603bd1cd82 [ 30.604121] 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 [ 30.606245] RSP: 002b:00007ffd407d20c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.607138] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f603bd1cd82 [ 30.607984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f603b156000 [ 30.609016] RBP: 00007f603b156000 R08: 0000000000000009 R09: 0000000000001000 [ 30.609863] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601b5d30ec0 [ 30.610706] R13: 00007ffd407d20e0 R14: 00007ffd407d2110 R15: 00007ffd407d2470 [ 30.611572] [ 30.611867] [ 30.612084] Allocated by task 213: [ 30.612518] kasan_save_stack+0x22/0x50 [ 30.613023] kasan_set_track+0x25/0x30 [ 30.613522] __kasan_slab_alloc+0x59/0x70 [ 30.614039] kmem_cache_alloc+0x16b/0x370 [ 30.614554] vm_area_dup+0x20/0x160 [ 30.615005] __split_vma+0x170/0x950 [ 30.615470] split_vma+0xc6/0x110 [ 30.615914] mprotect_fixup+0x8d2/0xb30 [ 30.616408] do_mprotect_pkey+0x87e/0xd40 [ 30.616928] __x64_sys_mprotect+0x78/0xc0 [ 30.617451] do_syscall_64+0x3f/0x90 [ 30.617917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.618560] [ 30.618772] Freed by task 213: [ 30.619158] kasan_save_stack+0x22/0x50 [ 30.619660] kasan_set_track+0x25/0x30 [ 30.620169] kasan_save_free_info+0x2b/0x50 [ 30.620703] __kasan_slab_free+0x10a/0x190 [ 30.621232] kmem_cache_free+0x10d/0x4d0 [ 30.621750] rcu_core+0x8c8/0x2860 [ 30.622193] __do_softirq+0x1b7/0x7d4 [ 30.622667] [ 30.622883] Last potentially related work creation: [ 30.623466] kasan_save_stack+0x22/0x50 [ 30.623978] __kasan_record_aux_stack+0x8e/0xa0 [ 30.624544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.625179] remove_vma+0x139/0x170 [ 30.625624] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.626176] do_vmi_munmap+0x1f1/0x2b0 [ 30.626656] __vm_munmap+0x138/0x3a0 [ 30.627122] __x64_sys_munmap+0x59/0x80 [ 30.627630] do_syscall_64+0x3f/0x90 [ 30.628106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.628749] [ 30.628968] The buggy address belongs to the object at ffff888019b59000 [ 30.628968] which belongs to the cache vm_area_struct of size 168 [ 30.630439] The buggy address is located 88 bytes inside of [ 30.630439] freed 168-byte region [ffff888019b59000, ffff888019b590a8) [ 30.631845] [ 30.632063] The buggy address belongs to the physical page: [ 30.632731] page:000000005df1a4aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b59 [ 30.633839] memcg:ffff888009ff5f01 [ 30.634266] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.634912] page_type: 0xffffffff() [ 30.635372] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.636302] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ff5f01 [ 30.637207] page dumped because: kasan: bad access detected [ 30.637871] [ 30.638084] Memory state around the buggy address: [ 30.638659] ffff888019b58f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.639517] ffff888019b58f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.640386] >ffff888019b59000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.641243] ^ [ 30.641969] ffff888019b59080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.642826] ffff888019b59100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.643670] ================================================================== [ 30.644631] Disabling lock debugging due to kernel taint [ 33.376500] BUG: Bad rss-counter state mm:000000004ce6f331 type:MM_FILEPAGES val:33 [ 33.377773] BUG: Bad rss-counter state mm:000000004ce6f331 type:MM_ANONPAGES val:22 [ 33.855433] BUG: Bad rss-counter state mm:000000001b2c496f type:MM_FILEPAGES val:33 [ 33.856633] BUG: Bad rss-counter state mm:000000001b2c496f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47386' (ECDSA) to the list of known hosts. 2023/06/21 01:45:11 fuzzer started 2023/06/21 01:45:11 dialing manager at localhost:36067 2023/06/21 01:45:11 checking machine... 2023/06/21 01:45:11 checking revisions... [ 34.497004] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:45:11 testing simple program... [ 34.538471] cgroup: Unknown subsys name 'net' [ 34.591258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:45:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800c2451f0 RCX=0000000000000000 RDX=ffff88800f5c7e18 RSI=ffff88800c2451f0 RDI=ffffffff856f0da0 RBP=ffff88800f5c7d08 RSP=ffff88800f5c7cd0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800f5c7e18 R13=ffffffff856f0da0 R14=0000000000000000 R15=00000000000007ff RIP=ffffffff814c086b RFL=00000296 [--S-AP-] 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 00007f936a0ed900 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=00007f936a6a50b0 CR3=000000000e740000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88807ffd7010 RCX=ffffffff811432de RDX=ffff888015ed0000 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000d7997a0 RSP=ffff88800694f798 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007f81a1052700 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=00007f0b224c35e0 CR3=000000000e6fc000 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=2031313a35343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000