Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.375398] BUG: Bad rss-counter state mm:00000000b21d366e type:MM_FILEPAGES val:33 [ 31.376105] BUG: Bad rss-counter state mm:00000000b21d366e type:MM_ANONPAGES val:22 [ 31.417293] ================================================================== [ 31.417902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.418506] Read of size 8 at addr ffff88800da2d798 by task sshd/219 [ 31.419000] [ 31.419147] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.421060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.421686] Call Trace: [ 31.421941] [ 31.422135] dump_stack_lvl+0x91/0xf0 [ 31.422458] print_report+0xcc/0x620 [ 31.422776] ? __virt_addr_valid+0x102/0x340 [ 31.423252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.423792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.424253] kasan_report+0xbe/0xf0 [ 31.424597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.425051] vma_interval_tree_remove+0xc75/0xec0 [ 31.425443] vma_prepare+0xc54/0x11a0 [ 31.425759] __split_vma+0x5af/0x950 [ 31.426119] ? __pfx___split_vma+0x10/0x10 [ 31.426465] ? find_held_lock+0x2c/0x110 [ 31.426807] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.427254] ? lock_is_held_type+0x9f/0x120 [ 31.433188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.433585] ? mtree_range_walk+0x632/0x900 [ 31.434001] ? mas_walk+0x5c7/0x7c0 [ 31.434315] do_vmi_munmap+0x1f1/0x2b0 [ 31.434640] mmap_region+0x1f9/0x2660 [ 31.435011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.435374] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.435828] ? __pfx_lock_acquire+0x10/0x10 [ 31.436248] ? __pfx_mmap_region+0x10/0x10 [ 31.436586] ? security_mmap_addr+0x7d/0xa0 [ 31.436977] ? get_unmapped_area+0x1f5/0x3f0 [ 31.438114] do_mmap+0x854/0xf00 [ 31.438405] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.438728] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.439232] ksys_mmap_pgoff+0x3af/0x500 [ 31.440710] do_syscall_64+0x3f/0x90 [ 31.441082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441656] RIP: 0033:0x7f558b3e0d82 [ 31.442010] 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 [ 31.443645] RSP: 002b:00007ffdf1d0da78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.444310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f558b3e0d82 [ 31.445006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f558a81a000 [ 31.445719] RBP: 00007f558a81a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.446320] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc3a3ebec0 [ 31.447001] R13: 00007ffdf1d0da90 R14: 00007ffdf1d0dac0 R15: 00007ffdf1d0de20 [ 31.447697] [ 31.447965] [ 31.448117] Allocated by task 212: [ 31.448486] kasan_save_stack+0x22/0x50 [ 31.448824] kasan_set_track+0x25/0x30 [ 31.449204] __kasan_slab_alloc+0x59/0x70 [ 31.449630] kmem_cache_alloc+0x16b/0x370 [ 31.450024] vm_area_dup+0x20/0x160 [ 31.450323] __split_vma+0x170/0x950 [ 31.450778] split_vma+0xc6/0x110 [ 31.451127] mprotect_fixup+0x8d2/0xb30 [ 31.452772] do_mprotect_pkey+0x87e/0xd40 [ 31.453171] __x64_sys_mprotect+0x78/0xc0 [ 31.453591] do_syscall_64+0x3f/0x90 [ 31.453949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.454479] [ 31.454620] Freed by task 0: [ 31.454868] kasan_save_stack+0x22/0x50 [ 31.455262] kasan_set_track+0x25/0x30 [ 31.455714] kasan_save_free_info+0x2b/0x50 [ 31.456153] __kasan_slab_free+0x10a/0x190 [ 31.456629] kmem_cache_free+0x10d/0x4d0 [ 31.457021] rcu_core+0x8c8/0x2860 [ 31.457578] __do_softirq+0x1b7/0x7d4 [ 31.457951] [ 31.458101] Last potentially related work creation: [ 31.458629] kasan_save_stack+0x22/0x50 [ 31.459023] __kasan_record_aux_stack+0x8e/0xa0 [ 31.460243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.460673] remove_vma+0x139/0x170 [ 31.461100] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.461473] do_vmi_munmap+0x1f1/0x2b0 [ 31.461794] __vm_munmap+0x138/0x3a0 [ 31.462226] __x64_sys_munmap+0x59/0x80 [ 31.462560] do_syscall_64+0x3f/0x90 [ 31.462872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.465010] [ 31.465167] The buggy address belongs to the object at ffff88800da2d740 [ 31.465167] which belongs to the cache vm_area_struct of size 168 [ 31.466195] The buggy address is located 88 bytes inside of [ 31.466195] freed 168-byte region [ffff88800da2d740, ffff88800da2d7e8) [ 31.467181] [ 31.467354] The buggy address belongs to the physical page: [ 31.467792] page:0000000092b84906 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda2d [ 31.468589] memcg:ffff88800df75301 [ 31.468879] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.469365] page_type: 0xffffffff() [ 31.469675] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.470335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df75301 [ 31.470991] page dumped because: kasan: bad access detected [ 31.471652] [ 31.471799] Memory state around the buggy address: [ 31.472191] ffff88800da2d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.475804] ffff88800da2d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.479907] >ffff88800da2d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.480567] ^ [ 31.480940] ffff88800da2d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.481612] ffff88800da2d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.482297] ================================================================== [ 31.483221] Disabling lock debugging due to kernel taint [ 36.990508] BUG: Bad rss-counter state mm:0000000066f43ce4 type:MM_FILEPAGES val:33 [ 36.991207] BUG: Bad rss-counter state mm:0000000066f43ce4 type:MM_ANONPAGES val:22 [ 38.269134] BUG: Bad rss-counter state mm:0000000027610a7c type:MM_FILEPAGES val:33 [ 38.269757] BUG: Bad rss-counter state mm:0000000027610a7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59875' (ECDSA) to the list of known hosts. 2023/06/20 08:21:03 fuzzer started 2023/06/20 08:21:03 dialing manager at localhost:44161 2023/06/20 08:21:03 checking machine... 2023/06/20 08:21:03 checking revisions... [ 39.283464] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:21:03 testing simple program... [ 39.341315] cgroup: Unknown subsys name 'net' [ 39.418015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:21:03 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ef9b680 RSI=ffffffff81764f65 RDI=0000000000000007 RBP=ffffea0001b3bd40 RSP=ffff888018c0f608 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffea0001b3bd40 R13=ffff888009f3b910 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c07eb RFL=00000293 [--S-A-C] 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 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=00007f2c877e3790 CR3=0000000018eea000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=a957c480ba628ca40000000000000000 XMM05=a7b4ef36902c00783e652f903d463c95 XMM06=e3c2ea43259beec51708c2519c6f0298 XMM07=5cf97654fd23e33ef3b7dca877381c35 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81740fa8 RBX=ffffffff85df2540 RCX=ffffffff81740f90 RDX=0000000000000000 RSI=ffffffff86127dd0 RDI=ffffffff85df252c RBP=ffffffff85df252c RSP=ffff888018c0f2c0 R8 =ffffffff86127dd0 R9 =ffff888018c0f3b8 R10=0000000000038001 R11=000000000001e456 R12=ffffffff85df253c R13=ffffffff85df252c R14=ffffffff85df252c R15=dffffc0000000000 RIP=ffffffff8112fca2 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 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=00007fc6f1f65260 CR3=0000000018eea000 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=756e696c2d34365f3638782f62696c2f XMM01=732e746964756162696c2f756e672d78 XMM02=00312e6f732e746964756162696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000