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[syzbot] Monthly fbdev report (Jun 2025) | 0 (1) | 2025/06/11 07:46 |
[syzbot] [fbdev?] KASAN: vmalloc-out-of-bounds Write in fillrect | 0 (1) | 2025/05/28 09:22 |
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[syzbot] Monthly fbdev report (Jun 2025) | 0 (1) | 2025/06/11 07:46 |
[syzbot] [fbdev?] KASAN: vmalloc-out-of-bounds Write in fillrect | 0 (1) | 2025/05/28 09:22 |
================================================================== BUG: KASAN: vmalloc-out-of-bounds in fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] BUG: KASAN: vmalloc-out-of-bounds in bitfill drivers/video/fbdev/core/fb_fillrect.h:134 [inline] BUG: KASAN: vmalloc-out-of-bounds in fb_fillrect_static drivers/video/fbdev/core/fb_fillrect.h:220 [inline] BUG: KASAN: vmalloc-out-of-bounds in fb_fillrect drivers/video/fbdev/core/fb_fillrect.h:279 [inline] BUG: KASAN: vmalloc-out-of-bounds in sys_fillrect+0x15d4/0x17b0 drivers/video/fbdev/core/sysfillrect.c:22 Write of size 8 at addr ffffc900036e9000 by task syz.2.878/11196 CPU: 0 UID: 0 PID: 11196 Comm: syz.2.878 Not tainted 6.16.0-rc2-syzkaller-00024-g9afe652958c3 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xcd/0x680 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] bitfill drivers/video/fbdev/core/fb_fillrect.h:134 [inline] fb_fillrect_static drivers/video/fbdev/core/fb_fillrect.h:220 [inline] fb_fillrect drivers/video/fbdev/core/fb_fillrect.h:279 [inline] sys_fillrect+0x15d4/0x17b0 drivers/video/fbdev/core/sysfillrect.c:22 drm_fbdev_shmem_defio_fillrect+0x22/0x140 drivers/gpu/drm/drm_fbdev_shmem.c:37 bit_clear+0x17a/0x220 drivers/video/fbdev/core/bitblit.c:73 __fbcon_clear+0x600/0x780 drivers/video/fbdev/core/fbcon.c:1297 fbcon_scroll+0x48b/0x690 drivers/video/fbdev/core/fbcon.c:1856 con_scroll+0x45f/0x690 drivers/tty/vt/vt.c:587 csi_M drivers/tty/vt/vt.c:2092 [inline] csi_ECMA drivers/tty/vt/vt.c:2504 [inline] do_con_trol drivers/tty/vt/vt.c:2678 [inline] do_con_write+0x5560/0x8280 drivers/tty/vt/vt.c:3174 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3516 process_output_block drivers/tty/n_tty.c:561 [inline] n_tty_write+0x40f/0x1160 drivers/tty/n_tty.c:2377 iterate_tty_write drivers/tty/tty_io.c:1006 [inline] file_tty_write.constprop.0+0x504/0x9b0 drivers/tty/tty_io.c:1081 tty_write drivers/tty/tty_io.c:1102 [inline] redirected_tty_write drivers/tty/tty_io.c:1125 [inline] redirected_tty_write+0xd4/0x150 drivers/tty/tty_io.c:1105 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x6c7/0x1150 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fed0e78e929 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:00007fed0f548038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fed0e9b6160 RCX: 00007fed0e78e929 RDX: 000000000000003a RSI: 0000200000000440 RDI: 0000000000000005 RBP: 00007fed0e810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fed0e9b6160 R15: 00007ffdd27346b8 </TASK> The buggy address ffffc900036e9000 belongs to a vmalloc virtual mapping Memory state around the buggy address: ffffc900036e8f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900036e8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc900036e9000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc900036e9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900036e9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/06/17 03:44 | upstream | 9afe652958c3 | d1716036 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/15 06:45 | upstream | 8c6bc74c7f89 | 5f4b362d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/09 06:32 | upstream | 939f15e640f1 | 4826c28e | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/06 20:03 | upstream | e271ed52b344 | 3d899f2c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/05 10:06 | upstream | 1af80d00e1e0 | 6b6b5f21 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/31 23:09 | upstream | 0f70f5b08a47 | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/31 05:43 | upstream | 8477ab143069 | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/30 05:25 | upstream | e0797d3b91de | 3d2f584d | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/20 18:50 | upstream | a5806cd506af | b47f9e02 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/14 22:12 | upstream | 9f35e33144ae | a4fa04ef | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/05/09 12:58 | upstream | 9c69f8884904 | 43803998 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-qemu-gce-upstream-auto | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/21 11:58 | upstream | 11313e2f7812 | d6cdfb8a | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/20 05:23 | upstream | 41687a5c6f8b | ed3e87f7 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/17 04:10 | upstream | 9afe652958c3 | d1716036 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/06/10 15:17 | upstream | f09079bd04a9 | 5d7e17ca | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: vmalloc-out-of-bounds Write in fillrect | ||
2025/04/16 00:23 | upstream | 1a1d569a75f3 | a95239b1 | .config | console log | report | info | [disk image (non-bootable)] [vmlinux] [kernel image] | ci-qemu-upstream | KASAN: vmalloc-out-of-bounds Write in fillrect |