[ 24.264803] BUG: Bad rss-counter state mm:00000000e6740c39 type:MM_FILEPAGES val:33 [ 24.266064] BUG: Bad rss-counter state mm:00000000e6740c39 type:MM_ANONPAGES val:22 [ 24.423122] ================================================================== [ 24.424224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.425460] Read of size 8 at addr ffff88800c93c880 by task sshd/220 [ 24.426301] [ 24.426519] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.427423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.428431] Call Trace: [ 24.428789] [ 24.429072] dump_stack_lvl+0x91/0xf0 [ 24.429571] print_report+0xcc/0x620 [ 24.430076] ? __virt_addr_valid+0x102/0x340 [ 24.430636] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.431270] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.431914] kasan_report+0xbe/0xf0 [ 24.432398] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.433049] vma_interval_tree_remove+0xc75/0xec0 [ 24.433658] vma_prepare+0xc54/0x11a0 [ 24.434158] __split_vma+0x5af/0x950 [ 24.434636] ? __pfx___split_vma+0x10/0x10 [ 24.435184] ? find_held_lock+0x2c/0x110 [ 24.435730] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.436318] ? lock_is_held_type+0x9f/0x120 [ 24.437008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.437777] ? mtree_range_walk+0x632/0x900 [ 24.438463] ? mas_walk+0x5c7/0x7c0 [ 24.439045] do_vmi_munmap+0x1f1/0x2b0 [ 24.439657] mmap_region+0x1f9/0x2660 [ 24.440252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.440931] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.441809] ? __pfx_lock_acquire+0x10/0x10 [ 24.442467] ? __pfx_mmap_region+0x10/0x10 [ 24.443126] ? security_mmap_addr+0x7d/0xa0 [ 24.443782] ? get_unmapped_area+0x1f5/0x3f0 [ 24.444454] do_mmap+0x854/0xf00 [ 24.445011] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.445631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.446324] ksys_mmap_pgoff+0x3af/0x500 [ 24.446962] do_syscall_64+0x3f/0x90 [ 24.447547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.448344] RIP: 0033:0x7fd13f17cd82 [ 24.448913] 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 [ 24.451585] RSP: 002b:00007ffcabd2d368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.452714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd13f17cd82 [ 24.453808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd13e5b6000 [ 24.454652] RBP: 00007fd13e5b6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.455495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e838d70d90 [ 24.456341] R13: 00007ffcabd2d380 R14: 00007ffcabd2d3b0 R15: 00007ffcabd2d710 [ 24.457212] [ 24.457502] [ 24.457720] Allocated by task 213: [ 24.458153] kasan_save_stack+0x22/0x50 [ 24.458652] kasan_set_track+0x25/0x30 [ 24.459149] __kasan_slab_alloc+0x59/0x70 [ 24.459674] kmem_cache_alloc+0x16b/0x370 [ 24.460193] vm_area_dup+0x20/0x160 [ 24.460648] __split_vma+0x170/0x950 [ 24.461126] split_vma+0xc6/0x110 [ 24.461563] mprotect_fixup+0x8d2/0xb30 [ 24.462068] do_mprotect_pkey+0x87e/0xd40 [ 24.462587] __x64_sys_mprotect+0x78/0xc0 [ 24.463112] do_syscall_64+0x3f/0x90 [ 24.463595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.464238] [ 24.464450] Freed by task 213: [ 24.464863] kasan_save_stack+0x22/0x50 [ 24.465367] kasan_set_track+0x25/0x30 [ 24.465856] kasan_save_free_info+0x2b/0x50 [ 24.466400] __kasan_slab_free+0x10a/0x190 [ 24.466925] kmem_cache_free+0x10d/0x4d0 [ 24.467439] rcu_core+0x8c8/0x2860 [ 24.467881] __do_softirq+0x1b7/0x7d4 [ 24.468355] [ 24.468571] Last potentially related work creation: [ 24.469164] kasan_save_stack+0x22/0x50 [ 24.469662] __kasan_record_aux_stack+0x8e/0xa0 [ 24.470238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.470874] remove_vma+0x139/0x170 [ 24.471325] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.471881] do_vmi_munmap+0x1f1/0x2b0 [ 24.472371] __vm_munmap+0x138/0x3a0 [ 24.472849] __x64_sys_munmap+0x59/0x80 [ 24.473339] do_syscall_64+0x3f/0x90 [ 24.473821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.474462] [ 24.474678] Second to last potentially related work creation: [ 24.475352] kasan_save_stack+0x22/0x50 [ 24.475871] __kasan_record_aux_stack+0x8e/0xa0 [ 24.476440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.477114] remove_vma+0x139/0x170 [ 24.477564] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.478125] do_vmi_munmap+0x1f1/0x2b0 [ 24.478610] mmap_region+0x1f9/0x2660 [ 24.479098] do_mmap+0x854/0xf00 [ 24.479522] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.480014] ksys_mmap_pgoff+0x3af/0x500 [ 24.480510] do_syscall_64+0x3f/0x90 [ 24.480985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.481640] [ 24.481857] The buggy address belongs to the object at ffff88800c93c828 [ 24.481857] which belongs to the cache vm_area_struct of size 168 [ 24.483337] The buggy address is located 88 bytes inside of [ 24.483337] freed 168-byte region [ffff88800c93c828, ffff88800c93c8d0) [ 24.484753] [ 24.484971] The buggy address belongs to the physical page: [ 24.485625] page:000000001eee4530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc93c [ 24.486707] memcg:ffff88800eeba801 [ 24.487135] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.487827] page_type: 0xffffffff() [ 24.488274] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9680 dead000000000003 [ 24.489211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeba801 [ 24.490104] page dumped because: kasan: bad access detected [ 24.490767] [ 24.490982] Memory state around the buggy address: [ 24.491555] ffff88800c93c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.492409] ffff88800c93c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.493266] >ffff88800c93c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.494108] ^ [ 24.494515] ffff88800c93c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.495370] ffff88800c93c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 24.496228] ================================================================== [ 24.497215] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.374500] BUG: Bad rss-counter state mm:00000000f9c9d5bd type:MM_FILEPAGES val:33 [ 26.375500] BUG: Bad rss-counter state mm:00000000f9c9d5bd type:MM_ANONPAGES val:22 [ 26.877209] BUG: Bad rss-counter state mm:000000003fa461ec type:MM_FILEPAGES val:33 [ 26.878666] BUG: Bad rss-counter state mm:000000003fa461ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56222' (ECDSA) to the list of known hosts. 2023/06/20 17:53:59 fuzzer started 2023/06/20 17:54:00 dialing manager at localhost:36067 2023/06/20 17:54:00 checking machine... 2023/06/20 17:54:00 checking revisions... [ 27.592680] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:54:00 testing simple program... [ 27.647986] cgroup: Unknown subsys name 'net' [ 27.685848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:59 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888014797dd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8186b780 R13=ffff88801466b680 R14=0000000000000001 R15=ffff88800ebce500 RIP=ffffffff8180f0a1 RFL=00000086 [--S--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 00007f56ca14c900 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=00007fb19de68650 CR3=00000000094c2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ed97b76de1207e6c00000000000ae988 XMM05=57ce689fc6d1bd3f0000000000133678 XMM06=fc9ec96b91d962be0000000000131dd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=1ffffffff0a58f21 RSI=ffffffff813bcfd9 RDI=0000000000000007 RBP=ffff88806cf09dc8 RSP=ffff88806cf09d88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=000000125fa080d8 R12=ffff88806cf39500 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8124f60a RFL=00000086 [--S--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=00007ffcad0325d8 CR3=000000001817a000 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=2039353a33353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000