[ 24.300725] BUG: Bad rss-counter state mm:00000000a2dfefeb type:MM_FILEPAGES val:33 [ 24.301448] BUG: Bad rss-counter state mm:00000000a2dfefeb type:MM_ANONPAGES val:22 [ 24.460552] ================================================================== [ 24.461476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.462458] Read of size 8 at addr ffff88800dfdfd08 by task sshd/219 [ 24.463233] [ 24.463459] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.464395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.465386] Call Trace: [ 24.465731] <TASK> [ 24.466023] dump_stack_lvl+0x91/0xf0 [ 24.466519] print_report+0xcc/0x620 [ 24.467006] ? __virt_addr_valid+0x102/0x340 [ 24.467560] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.468179] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.468814] kasan_report+0xbe/0xf0 [ 24.469300] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.469972] vma_interval_tree_remove+0xc75/0xec0 [ 24.470582] vma_prepare+0xc54/0x11a0 [ 24.471064] __split_vma+0x5af/0x950 [ 24.471541] ? __pfx___split_vma+0x10/0x10 [ 24.472072] ? find_held_lock+0x2c/0x110 [ 24.472609] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.473177] ? lock_is_held_type+0x9f/0x120 [ 24.473742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.474361] ? mtree_range_walk+0x632/0x900 [ 24.474928] ? mas_walk+0x5c7/0x7c0 [ 24.475411] do_vmi_munmap+0x1f1/0x2b0 [ 24.475917] mmap_region+0x1f9/0x2660 [ 24.476415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.476935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.477679] ? __pfx_lock_acquire+0x10/0x10 [ 24.478221] ? __pfx_mmap_region+0x10/0x10 [ 24.478773] ? security_mmap_addr+0x7d/0xa0 [ 24.479323] ? get_unmapped_area+0x1f5/0x3f0 [ 24.479894] do_mmap+0x854/0xf00 [ 24.480350] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.480849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.481419] ksys_mmap_pgoff+0x3af/0x500 [ 24.481956] do_syscall_64+0x3f/0x90 [ 24.482447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.483100] RIP: 0033:0x7f021944fd82 [ 24.483569] 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 [ 24.485746] RSP: 002b:00007ffd42105988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.486663] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f021944fd82 [ 24.487537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0218889000 [ 24.488407] RBP: 00007f0218889000 R08: 0000000000000009 R09: 0000000000001000 [ 24.489273] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e87bdef70 [ 24.490150] R13: 00007ffd421059a0 R14: 00007ffd421059d0 R15: 00007ffd42105d30 [ 24.491029] </TASK> [ 24.491325] [ 24.491548] Allocated by task 210: [ 24.491977] kasan_save_stack+0x22/0x50 [ 24.492489] kasan_set_track+0x25/0x30 [ 24.492993] __kasan_slab_alloc+0x59/0x70 [ 24.493528] kmem_cache_alloc+0x16b/0x370 [ 24.494063] vm_area_dup+0x20/0x160 [ 24.494526] __split_vma+0x170/0x950 [ 24.495003] split_vma+0xc6/0x110 [ 24.495457] mprotect_fixup+0x8d2/0xb30 [ 24.495968] do_mprotect_pkey+0x87e/0xd40 [ 24.496507] __x64_sys_mprotect+0x78/0xc0 [ 24.497030] do_syscall_64+0x3f/0x90 [ 24.497514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.498174] [ 24.498397] Freed by task 210: [ 24.498792] kasan_save_stack+0x22/0x50 [ 24.499306] kasan_set_track+0x25/0x30 [ 24.499804] kasan_save_free_info+0x2b/0x50 [ 24.500346] __kasan_slab_free+0x10a/0x190 [ 24.500894] kmem_cache_free+0x10d/0x4d0 [ 24.501406] rcu_core+0x8c8/0x2860 [ 24.501873] __do_softirq+0x1b7/0x7d4 [ 24.502366] [ 24.502586] Last potentially related work creation: [ 24.503184] kasan_save_stack+0x22/0x50 [ 24.503738] __kasan_record_aux_stack+0x8e/0xa0 [ 24.504350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.505039] remove_vma+0x139/0x170 [ 24.505541] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.506141] do_vmi_munmap+0x1f1/0x2b0 [ 24.506661] __vm_munmap+0x138/0x3a0 [ 24.507167] __x64_sys_munmap+0x59/0x80 [ 24.507690] do_syscall_64+0x3f/0x90 [ 24.508188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.508852] [ 24.509072] The buggy address belongs to the object at ffff88800dfdfcb0 [ 24.509072] which belongs to the cache vm_area_struct of size 168 [ 24.510592] The buggy address is located 88 bytes inside of [ 24.510592] freed 168-byte region [ffff88800dfdfcb0, ffff88800dfdfd58) [ 24.512067] [ 24.512279] The buggy address belongs to the physical page: [ 24.512973] page:00000000c0d31185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdf [ 24.514082] memcg:ffff88800eba6c01 [ 24.514520] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.515192] page_type: 0xffffffff() [ 24.515653] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329fc0 dead000000000002 [ 24.516590] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba6c01 [ 24.517507] page dumped because: kasan: bad access detected [ 24.518209] [ 24.518431] Memory state around the buggy address: [ 24.519028] ffff88800dfdfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.519902] ffff88800dfdfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.520772] >ffff88800dfdfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.521649] ^ [ 24.522095] ffff88800dfdfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.522955] ffff88800dfdfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.523816] ================================================================== [ 24.524792] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.445430] BUG: Bad rss-counter state mm:00000000e2b95c14 type:MM_FILEPAGES val:33 [ 26.447208] BUG: Bad rss-counter state mm:00000000e2b95c14 type:MM_ANONPAGES val:22 [ 26.994009] BUG: Bad rss-counter state mm:00000000328b90e4 type:MM_FILEPAGES val:33 [ 26.995187] BUG: Bad rss-counter state mm:00000000328b90e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49959' (ECDSA) to the list of known hosts. 2023/06/20 16:23:36 fuzzer started 2023/06/20 16:23:37 dialing manager at localhost:36067 2023/06/20 16:23:37 checking machine... 2023/06/20 16:23:37 checking revisions... [ 27.656845] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:23:37 testing simple program... [ 27.708693] cgroup: Unknown subsys name 'net' [ 27.769776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:36 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=000000000000000c RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000d RDI=ffff88800f9b7ac8 RBP=dffffc0000000000 RSP=ffff88800f9b79d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000000 R14=ffff88800f9b7a68 R15=ffff88800e9c7d80 RIP=ffffffff813ad651 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 00007fe087f6a900 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=00007fe088521618 CR3=000000000df08000 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=2036333a33323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f15e4399320 CR3=00000000145a0000 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=6ebd167e14c1bf809f4bf9500ba22790 XMM02=2c67c8bc2e329bc3000000000011b720 XMM03=fb795ef6d657705600000000001219a0 XMM04=c2738ddf4efd33f400000000000ae988 XMM05=dfcdbad4f1609c3700000000001314f8 XMM06=2da7224ed065ea6800000000001306d0 XMM07=e042d86d42eb936e0000000000121c20 XMM08=dbf5de7560432a01000000000011b780 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000