[ 28.286506] BUG: Bad rss-counter state mm:00000000b9f50755 type:MM_FILEPAGES val:33 [ 28.288297] BUG: Bad rss-counter state mm:00000000b9f50755 type:MM_ANONPAGES val:22 [ 28.446816] ================================================================== [ 28.447832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.448776] Read of size 8 at addr ffff88801c0685c8 by task sshd/219 [ 28.449719] [ 28.449940] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.450818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.451824] Call Trace: [ 28.452149] [ 28.452436] dump_stack_lvl+0x91/0xf0 [ 28.452923] print_report+0xcc/0x620 [ 28.453412] ? __virt_addr_valid+0x102/0x340 [ 28.453964] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.454613] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.455232] kasan_report+0xbe/0xf0 [ 28.455717] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.456336] vma_interval_tree_remove+0xc75/0xec0 [ 28.456942] vma_prepare+0xc54/0x11a0 [ 28.457426] __split_vma+0x5af/0x950 [ 28.457903] ? __pfx___split_vma+0x10/0x10 [ 28.458442] ? find_held_lock+0x2c/0x110 [ 28.458964] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.459535] ? lock_is_held_type+0x9f/0x120 [ 28.460077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.460692] ? mtree_range_walk+0x632/0x900 [ 28.461247] ? mas_walk+0x5c7/0x7c0 [ 28.461725] do_vmi_munmap+0x1f1/0x2b0 [ 28.462220] mmap_region+0x1f9/0x2660 [ 28.462710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.463225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.463940] ? __pfx_lock_acquire+0x10/0x10 [ 28.464476] ? __pfx_mmap_region+0x10/0x10 [ 28.465015] ? security_mmap_addr+0x7d/0xa0 [ 28.465548] ? get_unmapped_area+0x1f5/0x3f0 [ 28.466099] do_mmap+0x854/0xf00 [ 28.466565] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.467066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.467635] ksys_mmap_pgoff+0x3af/0x500 [ 28.468150] do_syscall_64+0x3f/0x90 [ 28.468631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.469281] RIP: 0033:0x7f7b5c6d1d82 [ 28.469742] 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 [ 28.471886] RSP: 002b:00007ffc3d04fca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.472796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b5c6d1d82 [ 28.473652] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b5bb0b000 [ 28.474527] RBP: 00007f7b5bb0b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.475383] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635e03c1f60 [ 28.476238] R13: 00007ffc3d04fcc0 R14: 00007ffc3d04fcf0 R15: 00007ffc3d050050 [ 28.477120] [ 28.477415] [ 28.477631] Allocated by task 209: [ 28.478066] kasan_save_stack+0x22/0x50 [ 28.478576] kasan_set_track+0x25/0x30 [ 28.479089] __kasan_slab_alloc+0x59/0x70 [ 28.479632] kmem_cache_alloc+0x16b/0x370 [ 28.480158] vm_area_dup+0x20/0x160 [ 28.480617] __split_vma+0x170/0x950 [ 28.481088] split_vma+0xc6/0x110 [ 28.481536] mprotect_fixup+0x8d2/0xb30 [ 28.482040] do_mprotect_pkey+0x87e/0xd40 [ 28.482584] __x64_sys_mprotect+0x78/0xc0 [ 28.483110] do_syscall_64+0x3f/0x90 [ 28.483592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.484237] [ 28.484451] Freed by task 209: [ 28.484845] kasan_save_stack+0x22/0x50 [ 28.485355] kasan_set_track+0x25/0x30 [ 28.485848] kasan_save_free_info+0x2b/0x50 [ 28.486392] __kasan_slab_free+0x10a/0x190 [ 28.486943] kmem_cache_free+0x10d/0x4d0 [ 28.487461] rcu_core+0x8c8/0x2860 [ 28.487907] __do_softirq+0x1b7/0x7d4 [ 28.488397] [ 28.488615] Last potentially related work creation: [ 28.489204] kasan_save_stack+0x22/0x50 [ 28.489753] __kasan_record_aux_stack+0x8e/0xa0 [ 28.490357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.491029] remove_vma+0x139/0x170 [ 28.491486] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.492058] do_vmi_munmap+0x1f1/0x2b0 [ 28.492549] __vm_munmap+0x138/0x3a0 [ 28.493019] __x64_sys_munmap+0x59/0x80 [ 28.493520] do_syscall_64+0x3f/0x90 [ 28.493995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.494660] [ 28.494879] The buggy address belongs to the object at ffff88801c068570 [ 28.494879] which belongs to the cache vm_area_struct of size 168 [ 28.496363] The buggy address is located 88 bytes inside of [ 28.496363] freed 168-byte region [ffff88801c068570, ffff88801c068618) [ 28.497790] [ 28.498006] The buggy address belongs to the physical page: [ 28.498678] page:00000000a6003ea4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c068 [ 28.499794] memcg:ffff88801c05f401 [ 28.500233] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.500884] page_type: 0xffffffff() [ 28.501348] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.502284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801c05f401 [ 28.503220] page dumped because: kasan: bad access detected [ 28.503901] [ 28.504118] Memory state around the buggy address: [ 28.504708] ffff88801c068480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.505574] ffff88801c068500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.506434] >ffff88801c068580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.507287] ^ [ 28.507955] ffff88801c068600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.508817] ffff88801c068680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.509667] ================================================================== [ 28.510604] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.026985] BUG: Bad rss-counter state mm:000000006e502313 type:MM_FILEPAGES val:33 [ 31.028308] BUG: Bad rss-counter state mm:000000006e502313 type:MM_ANONPAGES val:22 [ 31.437507] BUG: Bad rss-counter state mm:00000000bc814c98 type:MM_FILEPAGES val:33 [ 31.438798] BUG: Bad rss-counter state mm:00000000bc814c98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62479' (ECDSA) to the list of known hosts. 2023/06/19 21:02:39 fuzzer started 2023/06/19 21:02:39 dialing manager at localhost:44161 2023/06/19 21:02:39 checking machine... 2023/06/19 21:02:39 checking revisions... [ 32.174813] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:02:39 testing simple program... [ 32.226933] cgroup: Unknown subsys name 'net' [ 32.263640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:34 Registers: info registers vcpu 0 RAX=ffffffff863b1c83 RBX=0000000000000001 RCX=ffffffff863b1c7e RDX=0000000000000000 RSI=1ffffffff0c76390 RDI=ffffffff85fa3980 RBP=ffff888013fa7950 RSP=ffff888013fa7888 R8 =ffffffff863b1c4e R9 =ffff888013fa7938 R10=0000000000038001 R11=000000000008a96b R12=ffff888013fa7958 R13=ffff888013fa7940 R14=ffff888013fa7939 R15=ffff888013fa78f8 RIP=ffffffff81130a5b RFL=00000216 [----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 00007f9655f97900 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=00007fff16c00000 CR3=000000000e71e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f885c73bcf0 CR3=000000000e594000 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=2038333a32303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a32303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000