RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000005 RBP: 00007f1802b152a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1802cacfa0 R15: 00007fffc6da8468 ---[ end trace e777f26bc9a2f3bc ]--- ================================================================== BUG: KASAN: slab-out-of-bounds in __set_sit_entry_type fs/f2fs/segment.c:2257 [inline] BUG: KASAN: slab-out-of-bounds in reset_curseg+0x52e/0x590 fs/f2fs/segment.c:2663 Read of size 4 at addr ffff88810fd673c0 by task syz.8.274/1036 CPU: 0 PID: 1036 Comm: syz.8.274 Tainted: G W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 __set_sit_entry_type fs/f2fs/segment.c:2257 [inline] reset_curseg+0x52e/0x590 fs/f2fs/segment.c:2663 new_curseg+0x1371/0x18c0 fs/f2fs/segment.c:2723 __allocate_new_segment+0x144/0x870 fs/f2fs/segment.c:3039 __allocate_new_section fs/f2fs/segment.c:3047 [inline] f2fs_allocate_new_section+0x1c3/0x270 fs/f2fs/segment.c:3054 expand_inode_data+0x62d/0xc10 fs/f2fs/file.c:1713 f2fs_fallocate+0x429/0x7e0 fs/f2fs/file.c:1812 vfs_fallocate+0x492/0x570 fs/open.c:310 file_ioctl fs/ioctl.c:-1 [inline] do_vfs_ioctl+0x1686/0x1a30 fs/ioctl.c:732 __do_sys_ioctl fs/ioctl.c:751 [inline] __se_sys_ioctl+0x99/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1802a94169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f18010fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1802cacfa0 RCX: 00007f1802a94169 RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000005 RBP: 00007f1802b152a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1802cacfa0 R15: 00007fffc6da8468 Allocated by task 1036: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] __kmalloc+0x1aa/0x330 mm/slub.c:4033 __kmalloc_node include/linux/slab.h:418 [inline] kmalloc_node include/linux/slab.h:575 [inline] kvmalloc_node+0x82/0x130 mm/util.c:612 kvmalloc include/linux/mm.h:822 [inline] f2fs_kvmalloc fs/f2fs/f2fs.h:3368 [inline] f2fs_kvzalloc fs/f2fs/f2fs.h:3374 [inline] build_sit_info fs/f2fs/segment.c:4395 [inline] f2fs_build_segment_manager+0xd2c/0x49b0 fs/f2fs/segment.c:5258 f2fs_fill_super+0x6067/0x7d90 fs/f2fs/super.c:4268 mount_bdev+0x262/0x370 fs/super.c:1442 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593 vfs_get_tree+0x88/0x290 fs/super.c:1572 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917 path_mount+0x56f/0xcb0 fs/namespace.c:3247 do_mount fs/namespace.c:3260 [inline] __do_sys_mount fs/namespace.c:3468 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88810fd67000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 960 bytes inside of 1024-byte region [ffff88810fd67000, ffff88810fd67400) The buggy address belongs to the page: page:ffffea00043f5800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fd60 head:ffffea00043f5800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 ffffea00043e5600 0000000400000004 ffff888100042f00 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 94, ts 5867952989, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xbc/0x510 net/core/skbuff.c:212 alloc_skb include/linux/skbuff.h:1126 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1179 [inline] netlink_sendmsg+0x7a4/0xd00 net/netlink/af_netlink.c:1876 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg+0x1b1/0x280 net/socket.c:2466 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2466 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb page_owner free stack trace missing Memory state around the buggy address: ffff88810fd67280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88810fd67300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88810fd67380: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88810fd67400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88810fd67480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 1036 Comm: syz.8.274 Tainted: G B W 5.10.234-syzkaller-00033-g094fc3778d6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:update_sit_entry+0x434/0x1050 fs/f2fs/segment.c:-1 Code: 3b 48 89 45 b0 49 01 c7 41 f6 d5 41 80 e5 07 bb 01 00 00 00 44 89 e9 d3 e3 4d 89 fe 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b a5 68 ff ff ff 0f 85 05 09 00 00 45 0f RSP: 0018:ffffc90000b672b8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000080 RCX: 0000000000000007 RDX: 0000000000000000 RSI: 0000000000000282 RDI: ffff88810fd673c8 RBP: ffffc90000b67350 R08: ffffffff821fc8af R09: ffffffff821fc4fd R10: 0000000000000003 R11: ffff88810d52cf00 R12: 0000000000003e00 R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f18010fe6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2db1cff8 CR3: 0000000124faa000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_allocate_data_block+0x1512/0x3680 fs/f2fs/segment.c:3481 __allocate_data_block+0x5a7/0xb10 fs/f2fs/data.c:1407 f2fs_map_blocks+0x18ef/0x3e50 fs/f2fs/data.c:1575 expand_inode_data+0x682/0xc10 fs/f2fs/file.c:1717 f2fs_fallocate+0x429/0x7e0 fs/f2fs/file.c:1812 vfs_fallocate+0x492/0x570 fs/open.c:310 file_ioctl fs/ioctl.c:-1 [inline] do_vfs_ioctl+0x1686/0x1a30 fs/ioctl.c:732 __do_sys_ioctl fs/ioctl.c:751 [inline] __se_sys_ioctl+0x99/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:-1 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1802a94169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f18010fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1802cacfa0 RCX: 00007f1802a94169 RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000005 RBP: 00007f1802b152a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1802cacfa0 R15: 00007fffc6da8468 Modules linked in: ---[ end trace e777f26bc9a2f3bd ]--- RIP: 0010:update_sit_entry+0x434/0x1050 fs/f2fs/segment.c:-1 Code: 3b 48 89 45 b0 49 01 c7 41 f6 d5 41 80 e5 07 bb 01 00 00 00 44 89 e9 d3 e3 4d 89 fe 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 4c 8b a5 68 ff ff ff 0f 85 05 09 00 00 45 0f RSP: 0018:ffffc90000b672b8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000080 RCX: 0000000000000007 RDX: 0000000000000000 RSI: 0000000000000282 RDI: ffff88810fd673c8 RBP: ffffc90000b67350 R08: ffffffff821fc8af R09: ffffffff821fc4fd R10: 0000000000000003 R11: ffff88810d52cf00 R12: 0000000000003e00 R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f18010fe6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056213de9d0f8 CR3: 0000000124faa000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 3b 48 89 cmp -0x77(%rax),%ecx 3: 45 b0 49 rex.RB mov $0x49,%r8b 6: 01 c7 add %eax,%edi 8: 41 f6 d5 not %r13b b: 41 80 e5 07 and $0x7,%r13b f: bb 01 00 00 00 mov $0x1,%ebx 14: 44 89 e9 mov %r13d,%ecx 17: d3 e3 shl %cl,%ebx 19: 4d 89 fe mov %r15,%r14 1c: 49 c1 ee 03 shr $0x3,%r14 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 41 0f b6 04 06 movzbl (%r14,%rax,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 4c 8b a5 68 ff ff ff mov -0x98(%rbp),%r12 38: 0f 85 05 09 00 00 jne 0x943 3e: 45 rex.RB 3f: 0f .byte 0xf